ammonites
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Taxonomic names from J. J. Sepkoski 2002

  • Aachenaspis [Cephalaspidiformes]
  • Aacocrinus, Bowsher 1955 [Monobathrida]
  • Aaglacrinus [Cladida]
  • Aaleniella [Archaeogastropoda]
  • Aaleniella [Podocopida]
  • Aatocrinus, Moore and Plummer 1940 [Cladida]
  • Abacocrinus, Angelin 1878 [Monobathrida]
  • Abactinocrinus, L. R. Laudon and J. L. Severson 1953 [Monobathrida]
  • Abadehella, Okimura and Ishii 1975 [Abadehellidae]
  • Abadiella, Hupe 1952 [Abadiellidae]
  • Abadzekhia, Bannikov 1985 [Perciformes]
  • Abakania, Poletaeva 1973 [Corynexochidae]
  • Abakanopleura, Sivov 1955 [Trilobita]
  • Abakolia, Bognibova 1970 [Weymouthiidae]
  • Abathocrinus, Strimple 1963 [Monobathrida]
  • Abathomphalus [Foraminifera]
  • Abatocrinus, Lane 1963 [Monobathrida]
  • Abatus [Schizasteridae]
  • Abbasites [Hammatoceratidae]
  • Abderospira, Dall 1896 [Cylichnidae]
  • Abditodentrix [Bolivinitidae]
  • Abditoloculina [Palaeocopida]
  • Abdounia, Cappetta 1980 [Carchariniformes]
  • Abdullaevia [Foraminifera]
  • Aberia [Rhactorthidae]
  • Abertella, Durham 1953 [Abertellidae]
  • Abharella, Wittke 1984 [Anomocaridae]
  • Abicyathus [Cribricyathea]
  • Abiesgraptus [Graptoloidea]
  • Abludoglyptocrinus, Kolata 1982 [Monobathrida]
  • Abnormisphaera [Nassellaria]
  • Aboriginella, Koneva 1983 [Lingulellotretidae]
  • Abra, Lamarck 1818 [Semelidae]
  • Abrachiocrinus, Wanner 1923 [Cladida]
  • Abrardia [Foraminifera]
  • Abretiella [Neogastropoda]
  • Abrobairdia [Bairdiidae]
  • Abrocythereis [Podocopida]
  • Abrograptus [Graptoloidea]
  • Abrotocrinus, Miller and Gurley 1890 [Cladida]
  • Abruptolopha, Vialov 1936 [Ostreidae]
  • Absalomichthys, Whitley 1933 [Perciformes]
  • Absenticosta [Productellidae]
  • Absidaticonus [Helcionellidae]
  • Absonocytheropteron [Podocopida]
  • Abursus [Podocopida]
  • Abyssamina [Foraminifera]
  • Abyssocrinus, Strimple 1963 [Crinoidea]
  • Abyssocypris [Podocopida]
  • Abyssocythere [Podocopida]
  • Abyssocythereis [Podocopida]
  • Abyssothyris [Dyscoliidae]
  • Acabaria, Gray 1859 [Gorgonacea]
  • Acaciapora, Moore and Jeffords 1945 [Pachyporidae]
  • Acacocrinus, Wachsmuth and Springer 1897 [Monobathrida]
  • Acadagnostus, Kobayashi 1939 [Diplagnostidae]
  • Acadiocaris [Tanaidacea]
  • Acadoparadoxides, Green 1834 [Paradoxididae]
  • Acaeniotyle, Foreman 1973 [Parvivaccidae]
  • Acalepha [Trachylinida]
  • Acambona [Retziidae]
  • Acamptochetus [Neogastropoda]
  • Acamptogenotia, Rovereto 1899 [Turridae]
  • Acandylacanthus, St. John and Worthen 1875 [Ctenacanthiformes]
  • Acanothyra [Hexactinellida]
  • Acanthactinella [Reticulosa]
  • Acanthaecites [Oppeliidae]
  • Acanthambonia, Cooper 1956 [Siphonotretidae]
  • Acantharia, class [Actinopoda]
  • Acanthastrea, Milne-Edwards and Haime 1848 [Mussidae]
  • Acanthastrella [Astrophorida]
  • Acanthastus, Kozlowski 1948 [Graptolithina]
  • Acanthechinus [Phymosomatidae]
  • Acanthina, Fischer de Waldheim 1807 [Muricidae]
  • Acanthinites, E. v. Mojsisovics 1893 [Tibetitidae]
  • Acanthinucella [Muricidae]
  • Acanthobolbina [Palaeocopida]
  • Acanthocardia, Gray 1851 [Cardiidae]
  • Acanthocarpus, Stimpson 1870 [Calappidae]
  • Acanthocella [Cheilostomata]
  • Acanthocephalus, Qiu 1983 [Trilobita]
  • Acanthoceramoporella [Cystoporata]
  • Acanthoceras, Neumayr 1875 [Acanthoceratidae]
  • Acanthoceratites, Schrammen 1928 [Ceratitidae]
  • Acanthochaetetes, Fischer 1970 [Acanthochaetetidae]
  • Acanthochirana, Strand 1928 [Aegeridae]
  • Acanthochitina [Rhizopodea]
  • Acanthochitona, Gray 1821 [Acanthochitonidae]
  • Acanthocircus, Squinabol 1903 [Saturnalidae]
  • Acanthoclava [Problematica]
  • Acanthoclema [Nikiforovellidae]
  • Acanthoclymenia, Hyatt 1900 [Acanthoclymeniidae]
  • Acanthocordylodus [Conodontophorida]
  • Acanthocosta [Productidae]
  • Acanthocrania, Williams 1943 [Craniidae]
  • Acanthocrinus, F. A. Roemer 1850 [Diplobathrida]
  • Acanthocyathus, Milne-Edwards and Haime 1848 [Caryophylliidae]
  • Acanthocystites, Barrande 1887 [Eocrinoidea]
  • Acanthocythere [Podocopida]
  • Acanthocythereis [Podocopida]
  • Acanthodesia [Membraniporidae]
  • Acanthodictya [Reticulosa]
  • Acanthodida, order, Berg 1940 [Acanthodii]
  • Acanthodii, class, Owen 1846 [Teleostomi]
  • Acanthodina [Conodontophorida]
  • Acanthodiscus, Uhlig 1905 [Neocomitidae]
  • Acanthodus [Conodontophorida]
  • Acanthogammaridae, family [Amphipoda]
  • Acanthoglypha [Clarkellidae]
  • Acanthognathus, Duncker 1912 [Gasterosteiformes]
  • Acanthograptus [Dendroidea]
  • Acanthogyra, Ogilvie 1897 [Rhipidogyridae]
  • Acanthohoplites, Sinzow 1908 [Deshayesitidae]
  • Acantholambrus, W. C. Blow and R. B. Manning 1996 [Parthenopidae]
  • Acantholaminatus [Trepostomida]
  • Acantholenus, Matthew 1898 [Trilobita]
  • Acantholepis [Rhombifera]
  • Acantholytoceras, Spath 1932 [Crioceratitidae]
  • Acanthomeridion, Hou et al. 1989 [Bradoriida]
  • Acanthomeridion [Ostracoda]
  • Acanthometopus, Lu and Qian 1983 [Ptychopariida]
  • Acanthomicmacca, Hupé 1953 [Chengkouiidae]
  • Acanthomorpha, order, Rosen 1973 [Actinopteri]
  • Acanthonautilus, Foord 1896 [Solenochilidae]
  • Acanthonotus, Cuvier 1800 [Perciformes]
  • Acanthophillia [Anthozoa]
  • Acanthophora [Astrophorida]
  • Acanthophyllia, Wells 1937 [Mussidae]
  • Acanthophyllum, Dybowski 1873 [Ptenophyllidae]
  • Acanthoplecta [Productellidae]
  • Acanthopleura, Guilding 1829 [Chitonidae]
  • Acanthopleurella, Groom 1902 [Ptychopariida]
  • Acanthopleuroceras, Hyatt 1900 [Polymorphitidae]
  • Acanthopora [Cyclostomata]
  • Acanthoporella [Cheilostomata]
  • Acanthoporidea [Cheilostomata]
  • Acanthoproductus [Productidae]
  • Acanthopygaeus, Leriche 1906 [Perciformes]
  • Acanthopyge, Hawle and Corda 1847 [Lichidae]
  • Acanthopyle [Spumellaria]
  • Acanthopyrgus, R.C. Handfield 1967 [Capsulocyathida]
  • Acanthoraphis [Poecilosclerida]
  • Acanthorthis [Platystrophiidae]
  • Acanthoscapha [Beecherellidae]
  • Acanthoscaphites, Nowak 1911 [Scaphitidae]
  • Acanthoscyllium, Cappetta 1980 [Orectolobiformes]
  • Acanthosphaera, Ehrenberg 1859 [Actinommidae]
  • Acanthospirifer [Delthyrididae]
  • Acanthospongia [Lyssacinosa]
  • Acanthoteuthis [Belemnitida]
  • Acanthothiris, d'Orbigny 1849 [Acanthothirididae]
  • Acanthothoraci, order, Stensiö 1944 [Placodermi]
  • Acanthotoechia [Polytoechiidae]
  • Acanthotrigonia [Megatrigoniidae]
  • Acanthotrophia [Gastropoda]
  • Acanthotrypa [Trepostomida]
  • Acanthotrypina [Trepostomida]
  • Acanthurus, Forskal 1775 [Acanthuridae]
  • Acantonodella, Zaspelova 1952 [Drepanellidae]
  • Acar, Gray 1857 [Arcidae]
  • Acareorthis [Chileidae]
  • Acariaeocrinus, Biese 1935 [Crinoidea]
  • Acariaiocrinus, Wanner 1924 [Cladida]
  • Acarinina [Foraminifera]
  • Acaroceras [Ellesmerocerida]
  • Acasta, Leach 1817 [Archaeobalanidae]
  • Acastava, Richter 1954 [Acastidae]
  • Acaste, Goldfuss 1843 [Acastidae]
  • Acastella, Reed 1925 [Acastidae]
  • Acastellina, Richter and Richter 1975 [Phacopida]
  • Acastoides, Delo 1935 [Acastidae]
  • Acastopyge, Tomczykowa and Tomczyk 1970 [Phacopida]
  • Accordiella [Pfenderinidae]
  • Acculina, Misius and Ushatinskaya 1977 [Leptellinidae]
  • Accurganaxon [Anthozoa]
  • Acdalina [Anthozoa]
  • Acentrogobius, Bleeker 1874 [Perciformes]
  • Acentrophorus, Traquair 1877 [Semionotidae]
  • Acentrotremites, R. Etheridge and P. H. Carpenter 1883 [Spiraculata]
  • Acerahedrina [Nassellaria]
  • Acercostraca, order, Lehmann 1955 [Marrelomorpha]
  • Acernaspis, Campbell 1967 [Phacopidae]
  • Acerocanium [Nassellaria]
  • Acerocare [Olenidae]
  • Acerocarina, Poulson 1951 [Olenidae]
  • Aceroproetus, Kolobova 1988 [Proetida]
  • Acervularia, Schweigger 1819 [Acervulariidae]
  • Acervulina [Acervulinidae]
  • Acestrus, Agassiz 1845 [Perciformes]
  • Acetopeltis [Proetida]
  • Acevina [Mollusca]
  • Acharax, Dall 1908 [Solemyidae]
  • Achatella, Delo 1935 [Pterygometopidae]
  • Acheilops, Ulrich 1931 [Catillicephalidae]
  • Acheilus, Clark 1924 [Catillicephalidae]
  • Achiurus [Pleuronectiformes]
  • Achorocyathus [Cribricyathea]
  • Achradocrinus, Schultze 1866 [Cladida]
  • Achradocystites [Comarocystitida]
  • Achrestogrammus, Jordan 1921 [Scorpaeniformes]
  • Achrochordonia [Demospongea]
  • Aciculella [Hippocrepinidae]
  • Aciculiscala, N. F. Sohl 1963 [Epitoniidae]
  • Acidaspidella, Pokrovskaya 1963 [Lichakephalidae]
  • Acidaspides, Lermontova 1951 [Odontopleurida]
  • Acidaspidina, Lazerenko 1960 [Lichakephalidae]
  • Acidaspis, Murchison 1839 [Odontopleuridae]
  • Acidiphorus, Raymond 1925 [Bathyuridae]
  • Acidiscus, Rasetti 1966 [Weymouthiidae]
  • Acidnomelos [Nassellaria]
  • Acidocharacus [Sabelliditida]
  • Acidolites, Lang et al. 1940 [Coccoserididae]
  • Acidotocarena [Problematica]
  • Acidusus, Opik 1979 [Agnostida]
  • Acila, H. Adams and A. Adams 1858 [Nuculidae]
  • Acila (Truncacila), Grant and Gale 1931 [Nuculidae]
  • Acilia, Koken 1896 [Prostyliferidae]
  • Acimetopus, Rasetti 1966 [Weymouthiidae]
  • Acinophyllum, McLaren 1959 [Eridophyllidae]
  • Acipenseriformes, order, Berg 1940 [Actinopteri]
  • Acirsa, Mörch 1857 [Epitoniidae]
  • Acirsella, de Boury 1886 [Neotaenioglossa]
  • Acleistoceras, Hyatt 1884 [Acleistoceratidae]
  • Acliceratia [Neotaenioglossa]
  • Aclis, Loven 1846 [Neotaenioglossa]
  • Acloeodictya [Reticulosa]
  • Acmaea, Eschscholtz 1830 [Lottiidae]
  • Acmarhachis, Resser 1938 [Agnostidae]
  • Acme, Hartman 1821 [Aciculidae]
  • Acmoniodus, Hussakof and Bryant 1920 [Copodontiformes]
  • Acmophyllum, Sytova 1968 [Ptenophyllidae]
  • Acobaecardium [Pterioida]
  • Acolocrinus, Kesling and Paul 1971 [Crinoidea]
  • Acominia [Neogastropoda]
  • Acompsoceras [Acanthoceratidae]
  • Aconeceras, Hyatt 1903 [Oppeliidae]
  • Acontheus, Angelin 1852 [Corynexochida]
  • Acorylus, Olsson and Harbison 1953 [Tellinidae]
  • Acoscinopleura [Cheilostomata]
  • Acosmostroma, Stock 1998 [Densastromatidae]
  • Acostina [Foraminifera]
  • Acotripus [Nassellaria]
  • Acratia, Delo 1930 [Acratiidae]
  • Acratina [Bairdiidae]
  • Acratinella [Acratiidae]
  • Acravincula [Palaeocopida]
  • Acriaster [Cassiduloida]
  • Acriclymenia, Bogoslovsky 1975 [Carinoclymeniidae]
  • Acrilloscala [Neotaenioglossa]
  • Acrimeroceras, Becker 1993 [Dimeroceratidae]
  • Acrioceras, Hyatt 1900 [Ancyloceratidae]
  • Acrobotrys, Haeckel 1881 [Cannobotryidae]
  • Acrobrochus [Terebratulidae]
  • Acrocanites, Schindewolf 1922 [Prodromitidae]
  • Acrocephalaspis, Ivshin 1953 [Solenopleuridae]
  • Acrocephalella, Rozova 1963 [Acrocephalitidae]
  • Acrocephalina, Troedsson 1937 [Solenopleuridae]
  • Acrocephalites, Wallerius 1895 [Acrocephalitidae]
  • Acrocephalops, Poulson 1927 [Bolaspididae]
  • Acrocidaris [Pseudodiadematidae]
  • Acrocoelites [Megateuthididae]
  • Acrocoelum [Neotaenioglossa]
  • Acrocolpus, Cossmann 1895 [Cephalaspida]
  • Acrocosmia [Coelostylinidae]
  • Acrocrinus, Yandell 1855 [Monobathrida]
  • Acrocyathus, d'Orbigny 1849 [Lithostrotionidae]
  • Acrocythere, Neale 1960 [Progonocytheridae]
  • Acrodirotes, Opik 1967 [Ptychopariida]
  • Acrogenia [Cystoporata]
  • Acrognathus, Agassiz 1836 [Actinopterygii]
  • Acrograptus [Graptoloidea]
  • Acrohelia, Milne-Edwards and Haime 1857 [Oculinidae]
  • Acrohybus, raymond 1937 [Trilobita]
  • Acrolusia [Disasteridae]
  • Acronotella [Podocopida]
  • Acropeltis [Arbaciidae]
  • Acrophyllum, Thomson and Nicholson 1876 [Acrophyllidae]
  • Acropoma, Guenther 1859 [Acropomatidae]
  • Acropora, Oken 1815 [Acroporidae]
  • Acropora [Cheilostomata]
  • Acroreia [Basommatophora]
  • Acrosaster [Arbaciidae]
  • Acrosmilia, d'Orbigny 1849 [Acrosmiliidae]
  • Acrosolarium, Koken 1896 [Cirridae]
  • Acrosphaera, Haeckel 1881 [Collosphaeridae]
  • Acrosphaerorthoceras [Orthocerida]
  • Acrospirifer, Wedekind 1926 [Acrospiriferidae]
  • Acrospyris, Haeckel 1881 [Triospyrididae]
  • Acrossula [Ostracoda]
  • Acrostemma, Cossmann 1889 [Cephalaspida]
  • Acrosterigma, Dall 1900 [Cardiidae]
  • Acrostylus, Cossmann 1896 [Heterostrophia]
  • Acroteuthis, Stolley 1911 [Belemnitidae]
  • Acrothele, Linnarsson 1876 [Acrothelidae]
  • Acrothyra, Mathew 1901 [Acrotretidae]
  • Acrothyris [Stringocephalidae]
  • Acrotreta, Kutorga 1848 [Acrotretidae]
  • Acrotretella, Ireland 1961 [Torynelasmatidae]
  • Acrotretida, order, Kuhn 1949 [Lingulata]
  • Acruliammina, Loeblich and Tappan 1946 [Haplophragmoiidae]
  • Acsaspedites [Trachylinida]
  • Actaea, De Haan 1833 [Xanthidae]
  • Actaeon, Oken 1815 [Acteonidae]
  • Actaeonella (d'Orbigny 1843) [Acteonellidae]
  • Actaeonellina, Pchelintsev 1963 [Cephalaspida]
  • Actaeonema [Neotaenioglossa]
  • Actaeonidea, Gabb 1872 [Cephalaspida]
  • Actaeopsis, Carter 1898 [Decapoda]
  • Actaeopyramis, P. Fischer 1885 [Cimidae]
  • Actaeus [Arthropoda]
  • Acteocina, Gray 1847 [Cylichnidae]
  • Acteosaurus, H. von Meyer 1860 [Pythonomorpha]
  • Actiangulata [Podocopida]
  • Actinacis, d'Orbigny 1849 [Actinacididae]
  • Actinaraea, d'Orbigny 1849 [Actinacididae]
  • Actinaraeopsis, Roniewicz 1968 [Haplaraeidae]
  • Actinastraea (d'Orbigny 1849) [Actinastreidae]
  • Actinastraeopsis, Sikharulidze 1977 [Isastreidae]
  • Actiniaria, order [Anthozoa]
  • Actinobalanus, Moroni 1867 [Cirripedia]
  • Actinocamax, Miller 1823 [Belemnitellidae]
  • Actinoceras, Bronn 1837 [Actinoceratidae]
  • Actinocerida, order, C. Teichert 1933 [Cephalopoda]
  • Actinochilina [Palaeocopida]
  • Actinoconchus [Athyrididae]
  • Actinocrinites, J. S. Miller 1821 [Actinocrinitidae]
  • Actinocyathus, d'Orbigny 1849 [Axophyllidae]
  • Actinocyclina [Foraminifera]
  • Actinocythereis, Puri 1953 [Trachyleberididae]
  • Actinodesma, Sandberger 1856 [Pterineidae]
  • Actinodictya [Reticulosa]
  • Actinodictyon, Parks 1909 [Actinodictyidae]
  • Actinodonta, Philipps 1848 [Grammysiidae]
  • Actinofungia [Axinellida]
  • Actinoleuca, Oliver 1926 [Patellogastropoda]
  • Actinomena, Opik 1930 [Strophomenidae]
  • Actinomma, Haeckel 1862 [Actinommidae]
  • Actinomorpha, Flower 1943 [Valcouroceratidae]
  • Actinopeltis, Hawle and Corda 1847 [Cheiruridae]
  • Actinophrentis, Ivanovskiy 1967 [Antiphyllidae]
  • Actinophyma [Phymosomatoida]
  • Actinopoda, phylum [Protista]
  • Actinopora, d'Orbigny 1852 [Cyclostomata]
  • Actinopsis [Neotaenioglossa]
  • Actinosepia, Whiteaves 1897 [Teuthida]
  • Actinosiphon [Foraminifera]
  • Actinostreon, Bayle 1878 [Ostreidae]
  • Actinostroma, Nicholson 1886 [Actinostromatidae]
  • Actinostromaria, Haug 1909 [Actinostromariidae]
  • Actinostromarianina, Lecompte 1952 [Actinostromarianinidae]
  • Actinostromella, Boehnke 1915 [Actinostromellidae]
  • Actinotaxia [Cyclostomata]
  • Actinotocarcinus, R. Jenkins 1974 [Majidae]
  • Actinotrigonia [Trigoniida]
  • Actinotrypa [Cystoporata]
  • Actisecos [Cheilostomata]
  • Actomphalus () [Omphalocirridae]
  • Actumnus, Dana 1851 [Pilumnidae]
  • Acuariceras [Cephalopoda]
  • Aculatostroma [Stromatoporoidea]
  • Aculeochrea, Val'kov and Sysoev 1970 [Trilobozoa]
  • Aculopileus [Mollusca]
  • Acuminia [Neogastropoda]
  • Acuminothyris [Strophopleuridae]
  • Acuprisma [Metacopida]
  • Acupurpura [Muricidae]
  • Acutatheca [Adolfiidae]
  • Acutella, Lyashenko 1973 [Cyrtospiriferidae]
  • Acuticarpus [Cornuta]
  • Acuticloudina, Hahn and Pflug 1985 [Cloudinidae]
  • Acuticostites [Cephalopoda]
  • Acuticythereis [Podocopida]
  • Acuticytheretta [Podocopida]
  • Acutilineolus [Cyrtiidae]
  • Acutimitoceras, Librovitch 1957 [Gattendorfiidae]
  • Acutiramus [Eurypterida]
  • Acutirostriconus [Mollusca]
  • Acutitheca [Problematica]
  • Acutoria [Spinocyrtiidae]
  • Acutostrea, Vyalov 1936 [Flemingostreidae]
  • Acvocaria [Bythocytheridae]
  • Acylocrinus [Cladida]
  • Acyrena [Cardiida]
  • Adacrinus, Pabian and Strimple 1985 [Aesiocrinidae]
  • Adamanophyllum, Vasilyuk 1959 [Adamanophyllidae]
  • Adamczakia [Podocopida]
  • Adamczakites [Palaeocopida]
  • Adamnestia, Iredale 1936 [Cephalaspida]
  • Adamsoceras [Actinocerida]
  • Adansonella [Cardiida]
  • Adaptatrypa [Atrypidae]
  • Adastocephalum, Mitchell 1919 [Phacopida]
  • Adaverina, Klaamann 1969 [Aulocystidae]
  • Adectorhynchus [Areostrophiidae]
  • Adeditia [Podocopida]
  • Adekoheastrea, Ogbe 1976 [Scleractinia]
  • Adekunbiellda [Pogonophora]
  • Adeloceras [Nautilida]
  • Adelocoenia, d'Orbigny 1849 [Stylinidae]
  • Adelocyrtis [Nassellaria]
  • Adelodonex [Cardiida]
  • Adelogonus, Opik 1967 [Trilobita]
  • Adelograptus [Dendroidea]
  • Adelomelon, Dall 1906 [Volutidae]
  • Adelomelon (Miomelon), Dall 1907 [Volutidae]
  • Adelophthalmus, von Meyer 1853 [Adelophthalmidae]
  • Adelosina, d'Orbigny 1826 [Spiroloculinidae]
  • Adelphobolbina [Palaeocopida]
  • Adelphoceras, Barrande 1870 [Rutoceratidae]
  • Adelungia [Hormosinidae]
  • Ademtula [Neogastropoda]
  • Adenifera [Cheilostomata]
  • Adenus [Trimerellida]
  • Adeona [Adeonidae]
  • Adeonella [Adeonellidae]
  • Adeonellopsis [Adeonidae]
  • Adeorbis, S. Wood 1848 [Vitrinellidae]
  • Adercotryma [Foraminifera]
  • Adesmoconularia [Scyphozoa]
  • Adetognathus [Conodontophorida]
  • Adetopora, Sokolov 1955 [Aulocystidae]
  • Adhaerentia [Foraminifera]
  • Adiaphragma [Rafinesquinidae]
  • Adinocrinus, Kirk 1938 [Cladida]
  • Adinophyllum [Anthozoa]
  • Adinus [Neogastropoda]
  • Adiozoptyxis, Dietrich 1925 [Nerineidae]
  • Adkinsites, Spath 1931 [Brancoceratidae]
  • Admete, Mller 1842 [Cancellariidae]
  • Admetopsis [Neogastropoda]
  • Adminiculoria [Strophopleuridae]
  • Admirabilinella [Palaeocopida]
  • Admiratella [Fenestrata]
  • Admixtella [Polytoechiidae]
  • Admodorugosus [Productellidae]
  • Adnatida [Terebratellidae]
  • Adnatoceras, Flower 1939 [Spyroceratidae]
  • Adocetocystis [Rhombifera]
  • Adolfispirifer, Krylova 1962 [Echinospiriferidae]
  • Adontorhina [Cardiida]
  • Adradosia, Birenheide and Soto 1977 [Hapsiphyllidae]
  • Adraheutina [Foraminifera]
  • Adrana, Adams and Adams 1858 [Nuculanidae]
  • Adrenia [Meganterididae]
  • Adriacentrus, Radovcic 1975 [Beryciformes]
  • Adrianella [Demospongea]
  • Adriatella [Axinellida]
  • Adula, H. Adams and A. Adams 1857 [Mytilidae]
  • Adulomya [Solemyoida]
  • Adusta, Jousseaume 1884 [Cypraeidae]
  • Adversella [Sachitida]
  • Adygella [Dielasmatidae]
  • Adygelloides [Zugmayeriidae]
  • Adygeya, Dogushaeva 1996 [Sepiida]
  • Adytaster [Toxasteridae]
  • Aechmella, Canu and Bassler 1917 [Onychocellidae]
  • Aechmina, Jones and Holl 1869 [Aechminidae]
  • Aechminaria, Coryell and Williamson 1936 [Aechminidae]
  • Aedotes, Opik 1967 [Leiostegiidae]
  • Aeduella, Westoll 1937 [Aeduellidae]
  • Aegasteroceras [Arietitidae]
  • Aeger, Munster 1839 [Aegeridae]
  • Aegides [Maikhanellidae]
  • Aegilops [Arcida]
  • Aegiria, Opik 1933 [Aegiromenidae]
  • Aegironetes [Aegiromenidae]
  • Aegoceras [Liparoceratidae]
  • Aegocrioceras, Spath 1924 [Aegocrioceratidae]
  • Aegolytoceras [Lytoceratidae]
  • Aegospyris, Haeckel 1881 [Triospyrididae]
  • Aegrotocatellus, Adrain and Edgecombe 1995 [Phacopida]
  • Aegyptiana [Podocopida]
  • Aegyptopora [Cheilostomata]
  • Aehmospira [Archaeogastropoda]
  • Aeidimytilus, Olsson 1961 [Mytilidae]
  • Aelga [Periplomatidae]
  • Aellograptus [Graptolithina]
  • Aemula [Platidiidae]
  • Aemulophyllum, Oliver 1958 [Zaphrentidae]
  • Aeneator, Finlay 1926 [Buccinidae]
  • Aenigmastricklandia [Stricklandiidae]
  • Aenigmastrophia, Boucot 1971 [Aenigmastrophiidae]
  • Aenigmatectus, Hoare and Mapes 1996 [Hercolepadida]
  • Aenigmatoceras, J. J. Sepkoski 2002 [Cravenoceratidae]
  • Aenigmocrinus, Strimple 1973 [Cladida]
  • Aenona, Conrad 1870 [Tellinidae]
  • Aeolisaccus [Earlandiidae]
  • Aeoliscoides, Blot 1981 [Gasterosteiformes]
  • Aeoliscus, Jordan and Starks 1902 [Gasterosteiformes]
  • Aeolodon, H. von Meyer 1830 [Reptilia]
  • Aeolopneustes [Phymosomatidae]
  • Aeolopora [Cheilostomata]
  • Aeolostreptis [Foraminifera]
  • Aeora [Cardiida]
  • Aepyaster [Edrioasterida]
  • Aequipecten, Fischer 1886 [Pectinidae]
  • Aequispirella, Finlay 1924 [Turbinidae]
  • Aequspiriferina [Balatonospiridae]
  • Aeretica [Cardiida]
  • Aerithyris [Terebratulida]
  • Aeschronectida, order, Schram 1969 [Malacostraca]
  • Aesiocrinus [Aesiocrinidae]
  • Aesopomum [Areostrophiidae]
  • Aesopus, Gould 1860 [Columbellidae]
  • Aetea [Cheilostomata]
  • Aethalionopsis, Gaudant 1967 [Gonorhynchiformes]
  • Aetheia [Basiliolidae]
  • Aetheloxoceras [Yanhecerida]
  • Aetheretmon, White 1927 [Actinopterygii]
  • Aethiosolen [Orthocerida]
  • Aethirhynchia, Shi 1990 [Erymnariidae]
  • Aethoceras, Teichert and Glenister 1954 [Estonioceratidae]
  • Aethocrinus, Ubaghs 1969 [Cladida]
  • Aethodionide (Zhou and Ju 1983) [Dionididae]
  • Aetholicotoxotis [Palaeocopida]
  • Aethotaxis [Conodontophorida]
  • Aetobatus, Blainville 1816 [Myliobatidae]
  • Aetomylaeus, Garman 1908 [Myliobatidae]
  • Aetostreon, Bayle 1878 [Gryphaeidae]
  • Aexitrophocrinus [Dactylocrinidae]
  • Afer, Conrad 1858 [Turbinellidae]
  • Affinetrina, Luczkovska 1972 [Hauerinidae]
  • Affiniptyxis [Archaeogastropoda]
  • Affinocrinus, Knapp 1969 [Pirasocrinidae]
  • Affrollonia [Archaeogastropoda]
  • Afganodesma, Termier and Termier 1971 [Praenuculidae]
  • Afghanella, Thompson 1946 [Neoschwagerinidae]
  • Afghanocare, Wolfart 1975 [Anomocaridae]
  • Afiacyathus [Ajacicyathida]
  • Aforia, Dall 1889 [Turridae]
  • Afossochiton [Neoloricata]
  • Afranticythereis [Podocopida]
  • Africanaspis, Long et al. 1997 [Arthrodiriformes]
  • Africentrum, White and Moy-Thomas 1941 [Beryciformes]
  • Africogryphaea, Freneix 1963 [Gryphaeidae]
  • Africoterebellum [Neotaenioglossa]
  • Afrobolivina [Foraminifera]
  • Afrocardium, Tomlin 1931 [Cardiidae]
  • Afrocornulina [Neotaenioglossa]
  • Afrocypraea [Neotaenioglossa]
  • Afrocytheridea [Podocopida]
  • Afrops, Alberti 1983 [Phacopidae]
  • Afrovolutilithes [Neogastropoda]
  • Agapella [Arcticidae]
  • Agarhyncha [Trigonirhynchiidae]
  • Agaricia, Lamarck 1801 [Agariciidae]
  • Agaricocrinus, Austin 1851 [Monobathrida]
  • Agaso, Cobbold 1934 [Agraulidae]
  • Agasoma [Neogastropoda]
  • Agassiceras [Arietitidae]
  • Agassizia, Valenciennes 1846 [Schizasteridae]
  • Agassizocrinus, Owen and Shumard 1852 [Cladida]
  • Agassizodus, St. John and Worthen 1875 [Agassizodontidae]
  • Agastapleura [Brachiopoda]
  • Agastograptus, Obut and Zaslavskaya 1983 [Retiolitidae]
  • Agastophyllum [Anthozoa]
  • Agastrioceras, Schmidt 1938 [Reticuloceratidae]
  • Agastrocyathus [Archaeocyathida]
  • Agatha, A. Adams 1860 [Pyramidellidae]
  • Agathammina, Neumayr 1887 [Hemigordiopsidae]
  • Agathamminoides, Zaninetti 1969 [Ophthalmidiidae]
  • Agathelia, Reuss 1854 [Agatheliidae]
  • Agathiphyllia, Reuss 1864 [Faviidae]
  • Agathistoma [Trochidae]
  • Agathocrinus, Stoddart 1876 [Monobathrida]
  • Agathodonta, Cossmann 1918 [Chilodontidae]
  • Agathotoma, Cossmann 1899 [Turridae]
  • Agecephalichthys, Wade 1935 [Palaeonisciformes]
  • Agelagma, Opik 1967 [Catillicephalidae]
  • Agelasina [Cardiida]
  • Ageleodus, Owen 1867 [Chondrichthyes]
  • Ageria, Abbass 1973 [Procerithiidae]
  • Agerina, Tjernvik 1956 [Leiostegiidae]
  • Agerinella [Bactryniidae]
  • Agerostrea, Vialov 1936 [Ostreidae]
  • Agetograptus [Graptoloidea]
  • Agetolitella, Kim 1962 [Agetolitidae]
  • Agetolites, Sokolov 1955 [Agetolitidae]
  • Agglutinella [Hauerinidae]
  • Agglutisolena, Senowbari-Daryan 1984 [Ataxophragmiidae]
  • Aggregopora [Cyclostomata]
  • Aglagalia, Hupé 1960 [Trilobita]
  • Aglaocrinus, Strimple 1961 [Cromyocrinidae]
  • Aglaspella, Raasch 1939 [Aglaspididae]
  • Aglaspis, Hall 1862 [Aglaspididae]
  • Aglaspoides, Raasch 1939 [Aglaspididae]
  • Aglaurides [Eunicemorpha]
  • Aglithodictya [Reticulosa]
  • Aglyptorhynchus [Palaeorhynchidae]
  • Agmoblastus, Fay 1961 [Codasteridae]
  • Agnewia, Tenison-Woods 1878 [Muricidae]
  • Agnocardia, Stewart 1930 [Cardiidae]
  • Agnomyax [Cardiida]
  • Agnostardis, Opik 1963 [Agnostidae]
  • Agnostida, order, Salter 1864 [Trilobita]
  • Agnostogonus, Opik 1967 [Agnostida]
  • Agnostotes, Opik 1963 [Diplagnostidae]
  • Agnostus, Brongniart 1822 [Agnostidae]
  • Agoniatites, Meek 1877 [Agoniatitidae]
  • Agonus, Schneider 1801 [Scorpaeniformes]
  • Agostocrinus, Kesling and Paul 1971 [Crinoidea]
  • Agramatia [Araksalosiidae]
  • Agraulaeva [Trilobita]
  • Agraulopsis, Ruzicka 1940 [Ptychopariida]
  • Agrenocythere [Podocopida]
  • Agrioceras [Oncocerida]
  • Agriopleura [Caprotinidae]
  • Agriopoma, Dall 1902 [Veneridae]
  • Aguaraya, Rusconi 1954 [Trilobita]
  • Aguayoaster [Brissidae]
  • Aguilerella, Chavan 1951 [Grallatoridae]
  • Agulhasia [Chlidonophoridae]
  • Agulhasina [Podocopida]
  • Agyrekia, Koneva 1979 [Kutorginidae]
  • Agyrekocyathus [Ajacicyathida]
  • Ahlintella [Palaeocopida]
  • Ahrdorffia, Trauth 1911 [Curtoseriidae]
  • Ahtiella [Taffiidae]
  • Ahtioconcha [Pterioida]
  • Aiaiaspis, Nazarov 1973 [Solenopleuridae]
  • Aidarella, Lermontova 1951 [Trilobita]
  • Aidynkulirhynchia [Basiliolidae]
  • Aigialosaurus, Kramberger 1892 [Aigialosauridae]
  • Aigoceras [Discosorida]
  • Aikenicythere [Podocopida]
  • Ailsacrinus [Millericrinida]
  • Aimitus [Hyolithida]
  • Aimulosia [Buffonellodidae]
  • Ainacrinus, Wright 1941 [Sagenocrinida]
  • Ainia, Leleshus 1974 [Romingeriidae]
  • Ainigmacrinus, Hagdorn 1988 [Encrinida]
  • Ainiktozoon [Problematica]
  • Ainoceras [Nostoceratidae]
  • Aipetoceras [Discosorida]
  • Aipichthyoides, Gayet 1980 [Polymixiiformes]
  • Aipichthys, Bassani 1882 [Polymixiiformes]
  • Aipoceras, Hyatt 1883 [Aipoceratidae]
  • Airina [Palaeocopida]
  • Airtonia [Anopliidae]
  • Aisenvergia [Trepostomida]
  • Aistagnostus, Xiang and Zhang 1985 [Agnostida]
  • Aithriocrinus, Donov and Veltka 1993 [Cladida]
  • Aitilia [Palaeocopida]
  • Aizyella [Archaeogastropoda]
  • Ajacicrepida, Wengtang and Jell 1987 [Asaphida]
  • Ajacicyathellus [Ajacicyathida]
  • Ajacicyathida, order, Bedford and Bedford 1939 [Regulares]
  • Ajacicyathus [Ajacicyathida]
  • Ajchalina [Palaeocopida]
  • Ajrikina, Kryskov 1963 [Diceratocephalidae]
  • Ajukuzella [Zeilleriidae]
  • Aka, De Laubenfels 1936 [Adociidae]
  • Akademiophyllum [Cribricyathea]
  • Akadocrinus, Prokop 1962 [Eocrinoidea]
  • Akagophyllum, Minato and Kato 1965 [Waagenophyllidae]
  • Akantharges, Phleger 1936 [Lichida]
  • Akatopora [Antroporidae]
  • Akbashichia [Redlichiida]
  • Akburunella [Neogastropoda]
  • Akelina [Plectambonitidae]
  • Akera, Muller 1776 [Anaspidea]
  • Akidograptus [Graptoloidea]
  • Akiyoshiella [Foraminifera]
  • Akiyosiphyllum, Yabe and Sugiyama 1942 [Lithostrotionidae]
  • Akkermites [Palaeocopida]
  • Akmilleria, Ruzhencev 1940 [Medlicottiidae]
  • Akopovorhynchia [Rhynchonellidae]
  • Akroceras [Discosorida]
  • Aksopora [Disjectoporidae]
  • Aktassia, Popov 1976 [Acrotretidae]
  • Aktastioceras, Shimanskiy 1948 [Parabactritidae]
  • Aktinorbitoides [Foraminifera]
  • Aktjubocheilus [Oncocerida]
  • Aktubinskia, Ruzhencev 1940 [Medlicottiidae]
  • Aktubites, Ruzhencev 1955 [Parashumarditidae]
  • Aktuboclymenia, Bogoslovsky 1979 [Clymeniidae]
  • Aktugaia, Missarzhevsky 1976 [Mobergellidae]
  • Ala [Spiriferidae]
  • Alaba, H. Adams and A. A 1853 [Litiopidae]
  • Alabamina, Toulmin 1941 [Alabaminidae]
  • Alabaminoides [Foraminifera]
  • Alabina, Dall 1902 [Cerithiidae]
  • Alainaspis [Pteraspidomorphes]
  • Alaiophyllum, Goryanov 1961 [Disphyllidae]
  • Alakiria, Cuif 1976 [Volzeiidae]
  • Alakolites [Palaeocopida]
  • Alalcomenaeus, Simonetta 1970 [Arachnomorpha]
  • Alanisia, Hupe 1953 [Estaingiidae]
  • Alanites, Shevyrev 1968 [Khvalynitidae]
  • Alaoceras, Ruzhencev and Bogoslovskaya 1971 [Neoglyphioceratidae]
  • Alariopsis [Neotaenioglossa]
  • Alaskabolbina [Palaeocopida]
  • Alaskacoscinus [Archaeocyathida]
  • Alaskadiscus, Zhang 1980 [Yukoniidae]
  • Alaskaspongia [Porata]
  • Alaskoceras, Miller and Kummel 1945 [Estonioceratidae]
  • Alasonia [Pharetronida]
  • Alatacavellina [Podocopida]
  • Alatacythere [Podocopida]
  • Alataleberis [Podocopida]
  • Alataucyathus [Capsulocyathida]
  • Alataurus, Repina 1964 [Palaeolenidae]
  • Alatiformia [Spinocyrtiidae]
  • Alatoconus [Hydroconozoa]
  • Albaillella, Deflandre 1952 [Albaillellidae]
  • Albanites [Meekoceratidae]
  • Albansia, Howell 1937 [Solenopleuridae]
  • Albertaprion [Eunicemorpha]
  • Albertellina, Palmer 1979 [Zacanthoididae]
  • Alberticoryphe, Erben 1966 [Tropidocoryphidae]
  • Albertoceras, Ulrich and Foerste 1936 [Ellesmeroceratidae]
  • Albiconus [Conodonta]
  • Albrunnicola, Martinsson 1979 [Hipponicharionidae]
  • Albula, Gronow 1763 [Albulidae]
  • Albumares, Fedonkin 1976 [Trilobozoa]
  • Alcaldops, Arbizu 1979 [Phacopida]
  • Alceste, Hawle and Corda 1847 [Styginidae]
  • Alcidellus [Oppeliidae]
  • Alcidiella [Neotaenioglossa]
  • Alcimocrinus, Kirk 1938 [Cladida]
  • Alcira [Neogastropoda]
  • Alconeracyathus [Archaeocyathida]
  • Alcymene, Ramsköld et al. 1994 [Calymenidae]
  • Alcyonacea, order, Lamouroux 1816 [Anthozoa]
  • Aldanaspis, Lermontova 1940 [Solenopleuridae]
  • Aldania [Chancelloriida]
  • Aldanispirifer [Delthyrididae]
  • Aldanites [Orulganitidae]
  • Aldanospina [Chancelloriida]
  • Aldanotheca [Orthothecida]
  • Aldanotreta, Pel'man 1977 [Cryptotretidae]
  • Alderina [Calloporidae]
  • Aldingia [Kingenidae]
  • Aldonaia [Aldonaiidae]
  • Aldrichia [Neogastropoda]
  • Alectis, Rafinesque 1815 [Perciformes]
  • Alectona, Carter 1879 [Clionaidae]
  • Alectrion, Montfort 1810 [Nassariidae]
  • Alectryonella, Sacco 1897 [Ostreidae]
  • Alekcinella, Ivshin 1862 [Ptychopariida]
  • Alekseevaella [Innaechiidae]
  • Alekseites, Ljaschenko 1969 [Volynitidae]
  • Aleomorphella [Foraminifera]
  • Alepes, Swainson 1839 [Perciformes]
  • Alepisauriformes, order, Regan 1911 [Actinopteri]
  • Alepisaurus [Alepisauridae]
  • Aletes, Carpenter 1857 [Vermetidae]
  • Alethynoceras [Nautilida]
  • Aletoceras, Flower 1938 [Brevicoceratidae]
  • Aletograptus, Obut and Sobolevskaya 1962 [Dendroidea]
  • Alexandronautilus, Shimanskiy 1962 [Liroceratidae]
  • Alexenia [Productidae]
  • Alfeldites [Cephalopoda]
  • Alfredina [Foraminifera]
  • Algaroda [Neotaenioglossa]
  • Algerina [Podocopida]
  • Algerites [Cephalopoda]
  • Algherella [Conodontophorida]
  • Algomella [Mollusca]
  • Alia, H. Adams and A. Adams 1853 [Columbellidae]
  • Alichovia [Siphonotretidae]
  • Aliconchidium, St.-Joseph 1942 [Subrianidae]
  • Aliculastrum, Pilsbry 1896 [Haminoeidae]
  • Alievium, Pessagno 1972 [Pseudoaulophacidae]
  • Aligena, Lea 1843 [Lasaeidae]
  • Aliger [Strombidae]
  • Alimbella [Anomalorthidae]
  • Alinkioduncanella [Anthozoa]
  • Aliodonax [Cardiida]
  • Aliofusus, L. W. Stephenson 1941 [Buccinidae]
  • Aliomactra, L. W. Stephenson 1953 [Mactridae]
  • Aliquantula [Terebratellidae]
  • Alisea, Jordan and Gilbert 1919 [Clupeiformes]
  • Alisina, Rowell 1962 [Trematobolidae]
  • Alisocrinus, Kirk 1929 [Monobathrida]
  • Alispira [Atrypinidae]
  • Alispirifer [Strophopleuridae]
  • Alkenopterus [Eurypterida]
  • Allagecrinus, Etheridge and Carpenter 1881 [Crinoidea]
  • Allanella [Adolfiidae]
  • Allanetes [Chonetidae]
  • Allanicytidium [Mitrata]
  • Allanoceras, Barskov 1959 [Spyroceratidae]
  • Allantopora [Calloporidae]
  • Alleinacin [Cardiida]
  • Alleiolepis, Heller 1953 [Semionotiformes]
  • Allelepidotus, Fric 1906 [Semionotiformes]
  • Alleynia, Pocta 1902 [Laccophyllidae]
  • Alleynodictyon, Webby 1971 [Aulaceratidae]
  • Alliatina [Foraminifera]
  • Alliatinella [Foraminifera]
  • Alligaticeras [Cephalopoda]
  • Allionia, Michelotti 1861 [Comatulida]
  • Alloberyx, Gaudant 1969 [Beryciformes]
  • Allobodochus, Opik 1979 [Agnostida]
  • Allobuchia [Pterioida]
  • Allocatillocrinus, Wanner 1937 [Catillocrinidae]
  • Allocentrotus [Echinoida]
  • Alloceras [Oncocerida]
  • Alloceratites, L. F. Spath 1934 [Ceratitidae]
  • Allochiton [Ischnochitonidae]
  • Alloclionites, L. F. Spath 1951 [Steinmannitidae]
  • Allocoenia, Etallon 1858 [Actinastreidae]
  • Allocosmia [Neotaenioglossa]
  • Allocotoceras, Teichert and Glenister 1953 [Endoceratidae]
  • Allocrinus, Wachsmuth and Springer 1889 [Monobathrida]
  • Allocrioceras, Spath 1926 [Anisoceratidae]
  • Allocryptaspis [Pteraspidomorphes]
  • Allocyrtium [Spumellaria]
  • Allocystites [Diploporita]
  • Allocythereis [Podocopida]
  • Allodesma, Ulrich 1894 [Allodesmatidae]
  • Allograptus [Graptoloidea]
  • Alloiteaucoenia, Beauvais 1964 [Stylinidae]
  • Alloiteausmilia, Beauvais 1986 [Zardinophyllidae]
  • Allolepidotus, Deecke 1889 [Semionotidae]
  • Allomactra, Tomlin 1931 [Mactridae]
  • Allomera [Demospongea]
  • Allomma [Hemicidaroidea]
  • Allomorphina [Foraminifera]
  • Allomorphinella [Foraminifera]
  • Allonema [Eucarya]
  • Allonia, Doré and Reid 1965 [Chancelloriidae]
  • Allonychia, E. O. Ulrich 1895 [Ambonychiidae]
  • Allopagus [Cardiida]
  • Allophyllum, Schouppe 1957 [Hapsiphyllidae]
  • Allopiloceras, Ulrich and Foerste 1936 [Piloceratidae]
  • Allopleuron, Baur 1888 [Cheloniidae]
  • Allopora [Stylasterina]
  • Alloprosallocrinus, Casseday and Lyon 1862 [Monobathrida]
  • Alloptychites, L. F. Spath 1951 [Isculitidae]
  • Allorhynchus [Allorhynchidae]
  • Allosaccus [Demospongea]
  • Allosmerus, Hubbs 1925 [Osmeriformes]
  • Allosocrinus [Calceolispongiidae]
  • Allosycocrinus, Wanner 1924 [Cladida]
  • Allothrissops, Nybelin 1964 [Ichthyodectiformes]
  • Allotoxaster [Spatangoida]
  • Allotrioceras, Flower 1955 [Allotrioceratidae]
  • Allotropiophyllum, Grabau 1928 [Hapsiphyllidae]
  • Allozygocrinus, Witzke and Strimple 1981 [Diplobathrida]
  • Allumettoceras, A. F. Foerste 1926 [Tripteroceratidae]
  • Almaena [Foraminifera]
  • Almaloceras [Oncocerida]
  • Almascyllium, Cappetta 1980 [Orectolobiformes]
  • Almerarhynchia [Cyclothyrididae]
  • Almites, Toumansky 1941 [Marathonitidae]
  • Almohadites [Cephalopoda]
  • Almorhynchia [Basiliolidae]
  • Alnifia [Pterioida]
  • Alocaxis, Cossmann 1889 [Trypanaxidae]
  • Alocolytoceras [Lytoceratidae]
  • Alocopocythere [Podocopida]
  • Alocospira, Cossmann 1899 [Olividae]
  • Aloculatia [Palaeocopida]
  • Alokistocare, Lorenz 1906 [Alokistocaridae]
  • Alokistocarella, Resser 1938 [Alokistocaridae]
  • Alomataspis, Opik 1967 [Trilobita]
  • Alopias, Rafinesque 1810 [Alopiidae]
  • Alosa, Linck 1790 [Clupeidae]
  • Alosculum [Lychniscosa]
  • Alpenachitina [Rhizopodea]
  • Alpenoceras, Foerste 1927 [Discosoridae]
  • Alphacyathus [Ajacicyathida]
  • Alpicidaris [Cidaridae]
  • Alpillina [Foraminifera]
  • Alpinites, Bogoslovsky 1971 [Posttornoceratidae]
  • Alpinophragmium, Flügel 1967 [Coscinophragmatidae]
  • Alpinophyllia, Roniewicz 1989 [Alpinophylliidae]
  • Alpinoseris, Roniewicz 1989 [Alpinophylliidae]
  • Alsatites, Haug 1894 [Arietitidae]
  • Alsopocrinus, Tansey 1922 [Cladida]
  • Altaecypris [Palaeocopida]
  • Altaeorthis [Hesperorthidae]
  • Altaepeltis, Maksimova 1968 [Corynexochida]
  • Altaesajania, Maksimova 1978 [Phacopida]
  • Altaestrophia [Douvillinidae]
  • Altaethyrella [Rhynchonellata]
  • Altaicornus [Hyolithida]
  • Altaicyathus [Kazakhstanicyathida]
  • Altaiophyllum, Ivaniya 1955 [Streptelasmatidae]
  • Altaipecten [Pterioida]
  • Altaja, Zheltonogova 1960 [Entelophyllidae]
  • Altajaharpes, Petrunina 1984 [Trilobita]
  • Altajella, Kulkov 1962 [Xenomartiniidae]
  • Altaspiratella [Thecosomata]
  • Altasterella [Foraminifera]
  • Alternatus, Ljaschenko 1969 [Uniconidae]
  • Alternognathus [Conodontophorida]
  • Altha [Podocopida]
  • Altinerina [Milioliporidae]
  • Altiocculus, Sunbe 1994 [Alokistocaridae]
  • Altistoma [Foraminifera]
  • Altitudella, Repina 1974 [Ptychopariidae]
  • Altivasum [Neogastropoda]
  • Altrix, Palmer 1942 [Fissurellidae]
  • Altshedata [Cystoporata]
  • Altudoceras, Ruzhencev 1940 [Paragastrioceratidae]
  • Altunella [Tetralobulidae]
  • Alula [Sanguinolitidae]
  • Alurites, Ruzhencev and Bogoslovskaya 1975 [Reticuloceratidae]
  • Aluta, Mathew 1896 [Beyrichonidae]
  • Alutella [Comptalutidae]
  • Alutera, Oken 1817 [Tetraodontiformes]
  • Aluvarus, Bannikov and Tyler 1995 [Perciformes]
  • Aluverina [Fenestrata]
  • Aluveroceras [Actinocerida]
  • Alvania, Risso 1826 [Rissoidae]
  • Alvarezites [Athyrididae]
  • Alveinus, Conrad 1865 [Kelliellidae]
  • Alveocyclammina [Foraminifera]
  • Alveolaria [Cyclostomata]
  • Alveolella [Palaeocopida]
  • Alveolina [Alveolinidae]
  • Alveolinella [Alveolinidae]
  • Alveolites, Lamarck 1801 [Alveolitidae]
  • Alveolophragmium [Foraminifera]
  • Alveopora, Blainville 1830 [Poritidae]
  • Alveosepta, Hottinger 1967 [Hottingeritidae]
  • Alveovalvulina [Foraminifera]
  • Alvinia [Neotaenioglossa]
  • Alwynia [Notothyrididae]
  • Alwynopora [Fenestrata]
  • Alwynulus, Tripp 1967 [Phacopida]
  • Alysidota [Cheilostomata]
  • Alzonella [Foraminifera]
  • Amaea, H. Adams and A. Adams 1853 [Epitoniidae]
  • Amaea (Discoscala), Saccoa 1890 [Epitoniidae]
  • Amalda, H. Adams and A. Adams 1853 [Olividae]
  • Amalgamoporous, Farmer 1975 [Rhinidictyidae]
  • Amalgamoprus [Fenestrata]
  • Amaltheocrinus [Cyclocrinidae]
  • Amaltheus, de Montfort 1808 [Amaltheidae]
  • Amandaraia, Lavrusevich 1968 [Polycoeliidae]
  • Amandophyllum, Heritsch 1941 [Durhaminidae]
  • Amanses, Gray 1835 [Tetraodontiformes]
  • Amaraphyllum, Pedder 1970 [Disphyllidae]
  • Amarassites, O. Welter 1914 [Haloritidae]
  • Amarophos, Woodring 1964 [Buccinidae]
  • Amarsupiocrinus, Frest 1975 [Monobathrida]
  • Amathia [Ctenostomata]
  • Amaura, Moller 1842 [Heterostrophia]
  • Amaurellina, Fischer 1885 [Ampullinidae]
  • Amauroceras [Amaltheidae]
  • Amauropsis, Mörch 1857 [Naticidae]
  • Amauropsona [Neotaenioglossa]
  • Amaurospina [Naticidae]
  • Ambardella [Archaeorthidae]
  • Amberleya, Morris and Lycett 1851 [Eucyclidae]
  • Ambicocrinus, Kirk 1945 [Diplobathrida]
  • Ambigostrea, N. Malchus 1990 [Ostreidae]
  • Ambipleurus, Lambert 1932 [Temnopleuroida]
  • Ambitropus [Foraminifera]
  • Amblacrinus, Orbigny 1850 [Monobathrida]
  • Amblyacrum, Cossmann 1889 [Turridae]
  • Amblypneustes [Temnopleuridae]
  • Amblypterina, Berg 1940 [Palaeonisciformes]
  • Amblysiphonelloides [Sebargasiidae]
  • Ambocardia [Cardiida]
  • Ambocoelia, Hall 1860 [Ambocoeliidae]
  • Ambocythere [Podocopida]
  • Amboglossa [Ambocoeliidae]
  • Ambolostoma, R. E. Peck 1930 [Spiraculata]
  • Ambonlepidos [Turrilepadida]
  • Ambonolium, Raymond 1924 [Illaenuridae]
  • Ambonorthella [Rhipidomellidae]
  • Ambonychia, Hall 1847 [Ambonychiidae]
  • Ambostracon [Podocopida]
  • Ambrolinevitus, Syssoiev 1958 [Sulcavitidae]
  • Amecephalina, Poulson 1927 [Alokistocaridae]
  • Amecephalus, Walcott 1924 [Alokistocaridae]
  • Amecystis [Pleurocystitidae]
  • Amekichilus [Neotaenioglossa]
  • Amekicythara [Neogastropoda]
  • Ameranella, Beu 1988 [Ranellidae]
  • Americardia, Stewart 1930 [Cardiidae]
  • Americare, Lochman and Hu 1960 [Anomocarellidae]
  • Americaspis [Pteraspidomorphes]
  • Amerigobolbina [Palaeocopida]
  • Amerirostra, Jeletzky 1969 [Sepiida]
  • Amerista [Meristidae]
  • Amerycina [Cardiida]
  • Amesopleura [Strophopleuridae]
  • Amgaspis, Juan and Zhao [Amgaspididae]
  • Amginia, Pegel 1981 [Asaphida]
  • Amginoerbia, Chernysheva 1967 [Corynexochida]
  • Amginouyia, Chernysheva 1956 [Trilobita]
  • Amiantis, Carpenter 1863 [Veneridae]
  • Amiaspis, Lochmann 1944 [Lonchocephalidae]
  • Amictocracens, Henderson and MacKinnon 1981 [Acrotretidae]
  • Amicula, Gray 1847 [Mopaliidae]
  • Amicus, Koroleva 1967 [Ptychopariida]
  • Amiella [Anomalocarididae]
  • Amiiformes, order, O. P. Hay 1929 [Actinopteri]
  • Amijiella [Foraminifera]
  • Amiopsis, Kner 1863 [Amiidae]
  • Amiskwia [Problematica]
  • Amissopecten [Septalariidae]
  • Ammagnostus, Opik 1967 [Agnostidae]
  • Ammatophora [Cheilostomata]
  • Ammoastuta [Lituolidae]
  • Ammobacularia [Haplophragmoiidae]
  • Ammobaculites, Cushman 1910 [Haplophragmoiidae]
  • Ammobaculoides [Foraminifera]
  • Ammocycloculina [Foraminifera]
  • Ammodiscella [Ammodiscidae]
  • Ammodiscoides [Ammodiscidae]
  • Ammodiscus, Reuss 1862 [Ammodiscidae]
  • Ammoelphidiella [Foraminifera]
  • Ammoglobigerina [Foraminifera]
  • Ammolagena [Ammodiscidae]
  • Ammomarginulina, Wiesner 1931 [Lituolidae]
  • Ammonellipsites, Parkinson 1822 [Pericyclidae]
  • Ammonia, Bruennich 1772 [Rotaliidae]
  • Ammonicrinus [Sagenocrinida]
  • Ammonitida, order, A. Hyatt 1889 [Cephalopoda]
  • Ammonitina, suborder, A. Hyatt 1889 [Ammonitida]
  • Ammonitoceras [Cephalopoda]
  • Ammonoceratites, Bowditch 1822 [Lytoceratidae]
  • Ammonoidea, order, Zittel 1884 [Cephalopoda]
  • Ammopalmula [Haplophragmoiidae]
  • Ammoscalaria [Discamminidae]
  • Ammosiphonia [Haplophragmoididae]
  • Ammosphaeroidina [Foraminifera]
  • Ammospirata [Foraminifera]
  • Ammotium, Loeblich and Tappan 1953 [Haplophragmoiidae]
  • Ammotrochoides [Foraminifera]
  • Ammovertella [Miliolidae]
  • Ammovertellina [Ammodiscidae]
  • Ammovolummina [Ammodiscidae]
  • Amnestostroma [Stromatoporoidea]
  • Amniopora, Sokolov 1955 [Pyrgiidae]
  • Amoebites [Cardioceratidae]
  • Amoeboceras [Cardioceratidae]
  • Amoenirhynchia [Prionorhynchiidae]
  • Amoenospirifer [Adolfiidae]
  • Amonilea [Archaeogastropoda]
  • Amonohexacrinus, Schevchenko 1967 [Monobathrida]
  • Amonotis, Kittl 1904 [Posidoniidae]
  • Amoraster [Spatangoida]
  • Amorena [Neogastropoda]
  • Amoria, Gray 1855 [Volutidae]
  • Amorphognathus [Conodontophorida]
  • Amosina [Strophochonetidae]
  • Ampellatocephalina [Trilobita]
  • Ampelocrinus, Kirk 1942 [Ampelocrinidae]
  • Ampezzamilda [Heterostrophia]
  • Ampezzoella [Neotaenioglossa]
  • Ampezzogyra, Bandel 1996 [Heterostrophia]
  • Ampezzoscala [Neotaenioglossa]
  • Ampezzotrochus [Eucycloscalidae]
  • Amphelia [Oculinidae]
  • Ampheristocrinus, Hall 1879 [Cladida]
  • Amphiaraus, Vokes 1946 [Astartidae]
  • Amphiaulastrea, Geyer 1955 [Amphiastreidae]
  • Amphiblestrella [Chaperiidae]
  • Amphiblestrum [Calloporidae]
  • Amphibrachium, Hertwig 1879 [Patulibracchiidae]
  • Amphicervicis [Hemisphaeramminidae]
  • Amphichaena [Cardiida]
  • Amphiclina (Amphiclinodonta), Bittner 1888 [Koninckinidae]
  • Amphiclinodonta (Bittner 1888) [Koninckinidae]
  • Amphicoryna [Foraminifera]
  • Amphicostella [Metacopida]
  • Amphicrinus [Sagenocrinida]
  • Amphictene [Terebellomorpha]
  • Amphicyclia [Spumellaria]
  • Amphicyrtoceras, Foerste 1924 [Acleistoceratidae]
  • Amphicythere [Podocopida]
  • Amphicytherura [Podocopida]
  • Amphidesma [Cardiida]
  • Amphidiscosa, order, Schrammen 1924 [Hexactinellida]
  • Amphidonte, Fischer von Waldheim 1829 [Gryphaeidae]
  • Amphigeisina [Protoconodontida]
  • Amphigenia [Centronellidae]
  • Amphigraptus [Graptoloidea]
  • Amphijanira [Pterioida]
  • Amphikegelites [Amphissitidae]
  • Amphileberis [Podocopida]
  • Amphilectella, Schrammen 1901 [Pleromatidae]
  • Amphilichas, Raymond 1905 [Lichidae]
  • Amphimenium, Haeckel 1881 [Larnacillidae]
  • Amphimorphina [Foraminifera]
  • Amphimorsoniella [Cyclostomata]
  • Amphinomorpha, order [Polychaeta]
  • Amphiocoelia, Hall 1867 [Ambonychiidae]
  • Amphiperas, Herrmannsen 1846 [Ovulidae]
  • Amphiperca, Weitzel 1933 [Perciformes]
  • Amphipoda, order, Latreille 1816 [Malacostraca]
  • Amphipora, Schulz 1883 [Amphiporidae]
  • Amphiporella [Trepostomida]
  • Amphipsalidocrinus, Weller 1930 [Cladida]
  • Amphipsammus [Cardiida]
  • Amphipyndax, Foreman 1966 [Amphipyndacidae]
  • Amphisella [Palaeocopida]
  • Amphisorus, Ehrenberg 1839 [Soritidae]
  • Amphisphaera [Spumellaria]
  • Amphissa, H. Adams and A. Adams 1853 [Columbellidae]
  • Amphistegina [Amphisteginidae]
  • Amphistegina [Podocopida]
  • Amphistichus, Agassiz 1854 [Perciformes]
  • Amphistrophia [Amphistrophiidae]
  • Amphistrophiella [Amphistrophiidae]
  • Amphistylus [Spumellaria]
  • Amphithalamus, Carpenter 1864 [Barleeidae]
  • Amphitomaria [Discohelicidae]
  • Amphitomella [Diplospirellidae]
  • Amphitoxotis [Palaeocopida]
  • Amphitremoida [Saccamminidae]
  • Amphitriscoelus [Caprinidae]
  • Amphitrochus [Archaeogastropoda]
  • Amphitryon, Hawle and Corda 1874 [Remopleurididae]
  • Amphizona [Palaeocopida]
  • Amphorachitina [Rhizopodea]
  • Amphoracrinus, Austin 1848 [Monobathrida]
  • Amphoracrocrinus, Moore and Strimple 1969 [Monobathrida]
  • Amphoracystis [Diploporita]
  • Amphoratheca [Foraminifera]
  • Amphorella [Ptychopariida]
  • Amphorellina [Spirotrichia]
  • Amphorometra [Comatulida]
  • Amphorosteus, Gibbes 1850 [Mosasauridae]
  • Amphoton, Lorenz 1906 [Dolichometopidae]
  • Amphotonella, Kobayashi 1942 [Corynexochida]
  • Amplectoproductina [Foraminifera]
  • Ampletochilina [Palaeocopida]
  • Amplexiphyllum, Stumm 1949 [Stereolasmatidae]
  • Amplexizaphrentis, Vaughan 1906 [Hapsiphyllidae]
  • Amplexocarinia, Soshkina 1928 [Laccophyllidae]
  • Amplexograptus [Graptoloidea]
  • Amplexoides, Wang 1947 [Amplexidae]
  • Amplexopora [Trepostomida]
  • Amplexus, Sowerby 1814 [Amplexidae]
  • Ampliura, Morris and Collins 1991 [Leucosiidae]
  • Amplosipho [Neogastropoda]
  • Amplostoma [Neotaenioglossa]
  • Ampthillia [Cephalopoda]
  • Ampulla, Roding 1798 [Volutidae]
  • Ampullella, Cox 1931 [Ampullinidae]
  • Ampullina, Férussac 1822 [Ampullinidae]
  • Ampullinopsis, Conrad 1865 [Ampullinidae]
  • Ampullospira, Harris 1897 [Ampullinidae]
  • Ampuloides [Pachydomellidae]
  • Ampulonatica [Neotaenioglossa]
  • Ampurocrinus [Diplobathrida]
  • Ampyx, Dalman 1827 [Raphiophoridae]
  • Ampyxella, Dean 1960 [Raphiophoridae]
  • Ampyxina, Ullrich 1922 [Raphiophoridae]
  • Ampyxinella, Korleva 1959 [Raphiophoridae]
  • Amquia, Rasseti 1946 [Ptychopariida]
  • Amsassia, Sokolov and Mironova 1959 [Cryptolichenariidae]
  • Amsassipora [Trepostomida]
  • Amsdenella [Hebetoechiidae]
  • Amsdenina [Gypidulidae]
  • Amsdenoides, Sutherland 1965 [Amsdenoididae]
  • Amsdenostrophiella [Amphistrophiidae]
  • Amuletum, L. W. Stephenson 1941 [Turridae]
  • Amurodictya, Romanchuk 1979 [Cryptostomata]
  • Amuropecten [Pterioida]
  • Amussiopecten, Sacco 1897 [Pectinidae]
  • Amyclina, Iredale 1918 [Nassariidae]
  • Amydaicornus [Hyolithida]
  • Amydrotaxis [Conodontophorida]
  • Amygdalella [Palaeocopida]
  • Amygdalocystites [Comarocystitida]
  • Amygdalophyllidium, Kato and Minato 1974 [Pseudopavonidae]
  • Amygdalophylloides, Dobrolyubova and Kabakovich 1948 [Geyerophyllidae]
  • Amygdalophyllum, Dun and Benson 1920 [Aulophyllidae]
  • Amygdalotheca [Cornuta]
  • Amygdalum, Megerle 1811 [Mytilidae]
  • Amylodon, Storms 1894 [Chimaeriformes]
  • Amyssodropa [Neogastropoda]
  • Amzasskiella, Poletaeva 1960 [Ptychopariida]
  • Anabaia [Leptocoeliidae]
  • Anabaraceps, Repina 1972 [Redlichiida]
  • Anabaraspis, Lermontova 1951 [Redlichiida]
  • Anabaraspis, Lermontova 1951 [Ptychopariida]
  • Anabaria [Atrypinidae]
  • Anabaricornus [Hyolithida]
  • Anabarochilina [Ostracoda]
  • Anabolotreta, Rowell and Henderson 1978 [Acrotretidae]
  • Anacaenaspis, Bruton 1967 [Odontopleuridae]
  • Anacheirurus, Reed 1896 [Pilekiidae]
  • Anachis, H. Adams and A. Adams 1853 [Columbellidae]
  • Anacithara [Neogastropoda]
  • Anacleoniceras [Cephalopoda]
  • Anaclitacanthus, St. John and Worthen 1875 [Ctenacanthiformes]
  • Anaconularia [Scyphozoa]
  • Anacopodia [Trilobita]
  • Anactolasma [Anthozoa]
  • Anadara, Gray 1847 [Arcidae]
  • Anadara (Tosarca), Noda 1965 [Arcidae]
  • Anadesmoceras [Hoplitidae]
  • Anaethalion, White 1938 [Elopidae]
  • Anafesta (M. A. Fedonkin 1984) [Trilobozoa]
  • Anagaudryceras, Shimizu 1934 [Gaudryceratidae]
  • Anagymnites, A. Hyatt 1900 [Gymnitidae]
  • Anagymnotoceras, F. H. McLearn 1946 [Beyrichitidae]
  • Anahamulina, Hyatt 1900 [Hamulinidae]
  • Anahoplites [Hoplitidae]
  • Anahuacia [Rectonariidae]
  • Anakinetica [Terebratellidae]
  • Anaklinoceras, Stephenson 1941 [Nostoceratidae]
  • Anakrusa, Nazarov 1977 [Anakrusidae]
  • Analectis, Daniltshenko 1980 [Lampridiformes]
  • Analocaspis, Owens 1970 [Proetidae]
  • Analox, Rasetti 1966 [Weymouthiidae]
  • Analytoceras [Cephalopoda]
  • Anamesoceras [Discosorida]
  • Anamesocrinus, Goldring 1923 [Crinoidea]
  • Ananorites, C. Diener 1907 [Noritidae]
  • Ananterodonta [Modiomorphida]
  • Anapachydiscus, Yabe and Shimizu 1926 [Pachydiscidae]
  • Anapagurus, Henderson 1886 [Paguridae]
  • Anapepta [Neogastropoda]
  • Anaphragma [Trepostomida]
  • Anapliomerella [Phacopida]
  • Anapteris, Van Winkle 1919 [Corbulidae]
  • Anaptopora [Cheilostomata]
  • Anaptyctocyathus [Ajacicyathida]
  • Anarcestes, Mojsisovics 1882 [Anarcestidae]
  • Anarcestida, order [Cephalopoda]
  • Anarchocrinus, Jaekel 1918 [Cladida]
  • Anarhynchia [Peregrinellidae]
  • Anarosaurus, Dames 1890 [Eosauropterygia]
  • Anarrhichthys, Ayres 1855 [Perciformes]
  • Anarthropora [Cheilostomata]
  • Anartiocrinus, Kirk 1940 [Cladida]
  • Anartiocystis [Rhombifera]
  • Anascaphites [Cephalopoda]
  • Anasibirites, E. v. Mojsisovics 1896 [Prionitidae]
  • Anasirenites, E. v. Mojsisovics 1893 [Trachyceratidae]
  • Anaspidea, order, P. Fischer 1883 [Gastropoda]
  • Anaspyroceras, S. Shimizu and T. Obata 1935 [Dawsonoceratidae]
  • Anastes [Archaeogastropoda]
  • Anastomoceras, Flower 1939 [Spyroceratidae]
  • Anastomopora [Fenestrata]
  • Anastrophia [Parastrophinidae]
  • Anastrophognathus [Conodontophorida]
  • Anathyrella [Athyrididae]
  • Anathyris [Athyrididae]
  • Anatibetites, E. v. Mojsisovics 1896 [Tibetitidae]
  • Anaticinella [Foraminifera]
  • Anatiferopsis [Mitrata]
  • Anatifopsis, Barrande 1872 [Kirkocystidae]
  • Anatimya, Conrad 1860 [Laternulidae]
  • Anatina, Schumacher 1817 [Mactridae]
  • Anatipopecten, Hertlein 1936 [Pectinidae]
  • Anatolepsis [Pteraspidomorphes]
  • Anatoma, Woodward 1859 [Anatomidae]
  • Anatomites, E. v. Mojsisovics 1893 [Haloritidae]
  • Anatreta [Ephippelasmatidae]
  • Anatrypa [Atrypidae]
  • Anatsabites, Ruzhencev 1957 [Paragastrioceratidae]
  • Anaulocidaris [Miocidaridae]
  • Anavirgatites [Cephalopoda]
  • Anazola, Gray 1853 [Olividae]
  • Anazyga [Anazygidae]
  • Anbullina [Neogastropoda]
  • Ancalocrinus, Webster and Lane 1987 [Monobathrida]
  • Anceps [Archaeogastropoda]
  • Anchicrinus, Strimple and Watkins 1969 [Laudonocrinidae]
  • Anchigonites [Gonambonitidae]
  • Anchiopella, Reed 1907 [Calmoniidae]
  • Anchiopsis, Delo 1935 [Dalmanitidae]
  • Anchispirocyclina [Foraminifera]
  • Anchistrocheles [Podocopida]
  • Anchoa, Jordan and Evermann 1927 [Clupeiformes]
  • Anchomasa, Leach 1852 [Pholadidae]
  • Anchura, Conrad 1860 [Aporrhaidae]
  • Ancienta [Problematica]
  • Ancilla, Lamarck 1799 [Olividae]
  • Ancillarina [Neogastropoda]
  • Ancillina, Bellardi 1882 [Olividae]
  • Ancillista, Iredale 1936 [Olividae]
  • Ancillopsis [Olividae]
  • Ancillotoechia [Trigonirhynchiidae]
  • Ancistroceras, Boll 1867 [Lituitidae]
  • Ancistrocrania, Dall 1877 [Craniidae]
  • Ancistrocrinus [Sagenocrinida]
  • Ancistrolepis, Dall 1895 [Buccinidae]
  • Ancistromesus, Dall 1871 [Patellogastropoda]
  • Ancistrorhyncha [Ancistrorhynchidae]
  • Ancistrosyrinx, Dall 1881 [Turridae]
  • Ancliffia [Cardiida]
  • Anclyoceras [Cephalopoda]
  • Ancolioceras [Graphoceratidae]
  • Ancoracrinus [Sagenocrinida]
  • Ancoradella [Conodontophorida]
  • Ancorellina [Thecideidae]
  • Ancorhynchia [Wellerellidae]
  • Anculosa [Neotaenioglossa]
  • Ancylocidaris [Diadematoida]
  • Ancylostrophia [Douvillinidae]
  • Ancyrochitina [Rhizopodea]
  • Ancyrocrinus, Hall 1862 [Cladida]
  • Ancyrodella [Conodontophorida]
  • Ancyrodelloides [Conodontophorida]
  • Ancyrognathus [Conodontophorida]
  • Ancyrolepis [Conodontophorida]
  • Ancyropyge, Clark 1891 [Styginidae]
  • Ancyropyge [Odontopleurida]
  • Andalucinetes [Strophochonetidae]
  • Andalusiana, Lotze 1958 [Holmiidae]
  • Andamookia [Foraminifera]
  • Andemantastraea, Alloiteau 1951 [Andemantastraeidae]
  • Andenothyone [Dendrochirotida]
  • Anderkenia [Pterioida]
  • Andersenia [Foraminifera]
  • Andersenolina [Foraminifera]
  • Andersonites [Cephalopoda]
  • Anderssonella, Kobayashi 1936 [Saukiidae]
  • Anderssonoceras, Grabau 1924 [Anderssonoceratidae]
  • Andesites [Cephalopoda]
  • Andiceras [Cephalopoda]
  • Andicula [Turridae]
  • Andinacaste, Eldredge and Ormiston 1979 [Calmoniidae]
  • Andinodesma [Pholadomyida]
  • Anditrigonia [Trigoniida]
  • Andivaugonia [Trigoniida]
  • Andobolus [Problematica]
  • Andonia [Neogastropoda]
  • Andorina, Lorenthey 1901 [Leucosiidae]
  • Andrarina, Raymond 1937 [Andrarinidae]
  • Andrazella, Cuif 1976 [Procyclolitidae]
  • Andreaea, Schrammen 1902 [Cribrospongiidae]
  • Andreaspira [Spiriferidae]
  • Andreioceras [Discosorida]
  • Andrejella [Foraminifera]
  • Andreolepis, Gross 1968 [Osteichthyes]
  • Andriopora [Cheilostomata]
  • Androgynoceras [Liparoceratidae]
  • Andromeda [Amphipyndacidae]
  • Androsina [Soritidae]
  • Andrusella, Korobkov 1954 [Mactridae]
  • Andrusovicardium [Cardiida]
  • Anebocythereis [Podocopida]
  • Anebolithus, Huges and Wright 1970 [Trinucleidae]
  • Anechophragma [Grorudiidae]
  • Aneisohealdia [Podocopida]
  • Anelotreta, Pelman 1986 [Acrotretidae]
  • Anemetocrinus, Wright 1938 [Cladida]
  • Anemocephalops, Ivshin 1962 [Ptychopariida]
  • Anemocephalus, Ivshin 1955 [Ptychopariida]
  • Anepheloceras [Nautilida]
  • Anetoceras, Schindewolf 1934 [Mimosphinctidae]
  • Aneuretoceras [Collignoniceratidae]
  • Aneurystoma, Cossmann 1899 [Cancellariidae]
  • Anfaceras [Ceratitida]
  • Anfedatia [Ostracoda]
  • Angaraspis [Pteraspidomorphes]
  • Angarella, Asatkin 1932 [Acrotretida]
  • Angaria, Röding 1798 [Turbinidae]
  • Angaricyathus [Ajacicyathida]
  • Angarocaris [Merostomata]
  • Angastobactrites [Anarcestida]
  • Angelina, Salter 1859 [Olenidae]
  • Angelinoceras, Hyatt 1894 [Lituitidae]
  • Angeliphyllia, Barta-Calmus 1973 [Faviidae]
  • Angelopora [Cheilostomata]
  • Angioblastus, J. Wanner 1931 [Fissiculata]
  • Angiospirifer [Choristitidae]
  • Anglagnostus, Howell 1935 [Metagnostidae]
  • Anglaspis [Pteraspidomorphes]
  • Angliaecytheridea [Podocopida]
  • Anglicornus, Flower and Caster 1935 [Brevicoceratidae]
  • Anglidiscus, Regnll 1950 [Hemicystitidae]
  • Anglonautlis [Nautilida]
  • Angochitina [Rhizopodea]
  • Angolosaurus, Fitzsimons 1953 [Mosasauridae]
  • Angotia [Foraminifera]
  • Angranoceras (Sheng 1978) [Mongoloceratidae]
  • Anguilla, Schrank 1798 [Anguilliformes]
  • Anguillavus, Hay 1902 [Anguilliformes]
  • Anguilliformes, order, P. H. Greenwood et al. 1966 [Actinopteri]
  • Anguilloides, Cadrobbi 1962 [Anguilliformes]
  • Anguipecten [Pectinidae]
  • Anguisia [Cyclostomata]
  • Angularia [Purpurinidae]
  • Angulaticeras [Schlotheimiidae]
  • Angullophyllum, McLean 1974 [Arachnophyllidae]
  • Angulobracchia, Baumgartner 1980 [Angulobracchiidae]
  • Angulocrinus [Millericrinida]
  • Angulodiscus, Kristan 1957 [Involutinidae]
  • Angulodus [Conodontophorida]
  • Angulogavelinella [Foraminifera]
  • Angulogerina, Williamson 1858 [Rotaliina]
  • Angulotreta, Palmer 1954 [Acrotretidae]
  • Angulus, Megerle 1811 [Tellinidae]
  • Angustaeva, Hupé 1953 [Ptychopariida]
  • Angusticardinia [Angusticardiniidae]
  • Angusticardo [Cardiida]
  • Angusticornus [Hyolithida]
  • Angustiphyllum, Altevogt 1965 [Streptelasmatidae]
  • Angustolenellus, Palm and Repi 1993 [Olenellida]
  • Angustothyris [Angustothyrididae]
  • Anhelkocephalon [Isopoda]
  • Anhuiaspis, Qian and Qiu 1983 [Kaolishaniidae]
  • Anhuiceras [Ellesmerocerida]
  • Anhuiella [Sabelliditida]
  • Aniabrochus [Capillithyrididae]
  • Anictosphaera [Psammosphaeridae]
  • Anidanthus [Linoproductidae]
  • Anisactinella [Diplospirellidae]
  • Anisarcestes, Kittl 1908 [Arcestidae]
  • Anisastraea [Scleractinia]
  • Anisocardia, Munier-Chalmas 1863 [Arcticidae]
  • Anisoceras, Pictet 1854 [Anisoceratidae]
  • Anisocerasites [Eunicemorpha]
  • Anisochilina, Teichert 1937 [Leperditiidae]
  • Anisocidaris [Psychocidaridae]
  • Anisocoenia, Reuss 1867 [Faviidae]
  • Anisocorbula, Iredale 1930 [Corbulidae]
  • Anisocrinus [Sagenocrinida]
  • Anisocyamus [Podocopida]
  • Anisodonta, Deshayes 1858 [Sportellidae]
  • Anisograptus, Ruedemann 1937 [Dendroidea]
  • Anisomyon, Meek and Hayden 1860 [Siphonariidae]
  • Anisonotella, Whittington 1952 [Raphiophoridae]
  • Anisophyllum, Milne-Edwards and Haime 1850 [Anisophyllidae]
  • Anisopleurella, Cooper 1956 [Sowerbyellidae]
  • Anisotremus [Pomadasyidae]
  • Anisotrypa [Trepostomida]
  • Ankhelasma, Sando 1961 [Zaphrentoididae]
  • Ankinatsytes, Collignon 1965 [Nostoceratidae]
  • Ankitokazocaris [Concavicarida]
  • Ankoura, Resser 1938 [Kingstoniidae]
  • Ankumia [Platycopida]
  • Ankyloceras, Zhuravleva 1974 [Karoceratidae]
  • Ankylophorus [Pachycormiformes]
  • Annachlamys, Iredale 1939 [Pectinidae]
  • Annaecoelia, Senowbari-Daryan 1978 [Tebagathalamiidae]
  • Annamitella, Mansuy 1920 [Leiostegiidae]
  • Annamitia, Mansuy 1916 [Alokistocaridae]
  • Annectina, Suleymanov 1963 [Ammodiscidae]
  • Annectocyma [Cyclostomata]
  • Annepona [Neotaenioglossa]
  • Anningella, Cox 1958 [Buchiidae]
  • Annoceras, Flower 1964 [Ellesmeroceratidae]
  • Annulinectes [Pterioida]
  • Annuloceras, Murphy et al. 1995 [Aegocrioceratidae]
  • Annulocibicides [Foraminifera]
  • Annulocyathella [Ajacicyathida]
  • Annulocyathus [Ajacicyathida]
  • Annulofrondicularia [Foraminifera]
  • Annulofungia [Ajacicyathida]
  • Annulopatellina [Annulopatellinidae]
  • Annunziopora [Trepostomida]
  • Anobasicrinus, Strimple 1961 [Anobasicrinidae]
  • Anodontia, Link 1807 [Lucinidae]
  • Anodontopleura [Hippuritida]
  • Anodontopsis, McCoy 1851 [Allodesmatidae]
  • Anofia [Cardiida]
  • Anolcites, E. v. Mojsisovics 1893 [Trachyceratidae]
  • Anolotichia [Cystoporata]
  • Anomactinella [Diplospirellidae]
  • Anomalinella [Foraminifera]
  • Anomalinoides, Brotzen 1942 [Heterolepidae]
  • Anomalisipho [Neogastropoda]
  • Anomalocardia, Schumacher 1817 [Veneridae]
  • Anomalocaris [Anomalocarididae]
  • Anomaloceras, Hyatt 1884 [Rutoceratidae]
  • Anomalocrinus, Meek and Worthen 1868 [Crinoidea]
  • Anomalocystites [Mitrata]
  • Anomalodiscus [Veneridae]
  • Anomalodonta, S.A. Miller 1874 [Ambonychiidae]
  • Anomalofusus, B. Wade 1916 [Fasciolariidae]
  • Anomaloglossa [Obolidae]
  • Anomalograptus [Graptoloidea]
  • Anomalokellia [Cardiida]
  • Anomalomya [Sacoglossa]
  • Anomalopleuroides [Pholadomyida]
  • Anomalopsis [Squamata]
  • Anomalorthis [Anomalorthidae]
  • Anomalotoechus [Trepostomida]
  • Anomastraea, Marenzeller 1901 [Siderastreidae]
  • Anomeioceras, Foerste 1930 [Acleistoceratidae]
  • Anomia (Patro), Gray 1850 [Anomiidae]
  • Anomianella, Ryckholt 1851 [Anomiidae]
  • Anommatocyther [Podocopida]
  • Anomocare, Angelin 1854 [Anomocaridae]
  • Anomocarella, Walcott 1905 [Anomocarellidae]
  • Anomocarina, Lermontova 1940 [Anomocaridae]
  • Anomocarioides, Lermontova 1940 [Anomocaridae]
  • Anomocariopsis, Sivov 1955 [Asaphida]
  • Anomoclonella [Demospongea]
  • Anomocytheridea [Podocopida]
  • Anomoeodus, Forir 1887 [Pycnodontidae]
  • Anomopora [Scleractinia]
  • Anomorphites, Kolb 1910 [Pleromatidae]
  • Anomotodon, Arambourg 1952 [Mitsukurinidae]
  • Anonymoceras [Oncocerida]
  • Anopaea, Eichwald 1861 [Inoceramidae]
  • Anopisthodon [Trigoniida]
  • Anoplia [Anopliidae]
  • Anopliopsis [Anopliidae]
  • Anoploceras, Hyatt and Zittel 1900 [Tainoceratidae]
  • Anoplotheca [Anoplothecidae]
  • Anopocodia, Opik 1967 [Ptychopariida]
  • Anopolenus, Salter 1864 [Centropleuridae]
  • Anoptambonites, A. Williams 1962 [Hesperomenidae]
  • Anoria, Walcott 1924 [Dolichometopidae]
  • Anornithopora [Cribrilinidae]
  • Anorthopygus [Anorthopygidae]
  • Anostylostroma, Parks 1936 [Tienodictyidae]
  • Anotoceras, Hyatt 1900 [Otoceratidae]
  • Anotopora [Cheilostomata]
  • Anoxypristis, White and Moy-Thomas 1941 [Pristidae]
  • Ansates, Sowerby 1839 [Patellogastropoda]
  • Ansella [Conodontophorida]
  • Antacaroceras [Ellesmerocerida]
  • Antactinodion [Nuculida]
  • Antagmopleura, Lermontova 1960 [Trilobita]
  • Antagmus, Resser 1936 [Antagmidae]
  • Antalis, H. Adams and A. Adams 1854 [Dentaliidae]
  • Antalyna [Foraminifera]
  • Antarcticella [Foraminifera]
  • Antarctidromia, Forster 1985 [Homolodromiidae]
  • Antarctissa, Petrushevskaya 1967 [Lophophaenidae]
  • Antarctodarwinella, Zinsmeister 1976 [Struthiolariidae]
  • Antarctomithrax, R. Feldmann 1994 [Homolidae]
  • Antatlaeva, Hupé 1960 [Trilobita]
  • Antatlasia, Hupe 1952 [Ptychopariida]
  • Anteglossia [Neotaenioglossa]
  • Antelocoelia, Isaacson 1977 [Atrypida]
  • Antennarius, Lacpde 1798 [Lophiiformes]
  • Antepepta [Neogastropoda]
  • Antetrichomya, Iredale 1951 [Mytilidae]
  • Anthaspidella, Ulrich and Everett 1889 [Anthaspidellidae]
  • Anthemocrinus, Wachsmuth and Springer 1881 [Diplobathrida]
  • Antheria, Wu and Zhao 1974 [Petalaxidae]
  • Antherolites, Sokolov 1955 [Multisoleniidae]
  • Anthoblastus, J. Wanner 1924 [Fissiculata]
  • Anthoceras, Teichert and Glenister 1954 [Proterocameroceratidae]
  • Anthochitina [Rhizopodea]
  • Anthocyrtidium, Haeckel 1881 [Pterocorythidae]
  • Anthocyrtis [Nassellaria]
  • Anthocyrtoma [Nassellaria]
  • Anthograptus, Tsegelnjuk 1976 [Graptoloidea]
  • Antholites, Davis 1887 [Micheliniidae]
  • Anthomorpha [Archaeocyathida]
  • Anthomorpha [Oncocerida]
  • Anthonya, Gabb 1864 [Crassatellidae]
  • Anthospyris, Haeckel 1881 [Triospyrididae]
  • Anthozoa, class, Ehrenberg 1834 [Cnidaria]
  • Anthracaris [Mysidacea]
  • Anthracocaris [Tanaidacea]
  • Anthracoceras, Frech 1899 [Anthracoceratidae]
  • Anthracoceratites, Ramsbottom 1970 [Dimorphoceratidae]
  • Anthracoceratoides, Ramsbottom 1970 [Anthracoceratidae]
  • Anthracocrinus, Strimple 1955 [Diplobathrida]
  • Anthracomedusa [Carybdeida]
  • Anthracophausia [Eocaridacea]
  • Antiaechmia [Palaeocopida]
  • Antiarcha, order [Placodermi]
  • Antibythocypris [Podocopida]
  • Anticlimax, Pilsbry and McGinty 1946 [Vitrinellidae]
  • Anticonulus, Cossmann 1918 [Trochidae]
  • Anticostiella [Palaeocopida]
  • Anticythereis [Podocopida]
  • Antigona, Schumacher 1817 [Veneridae]
  • Antigonambonites [Gonambonitidae]
  • Antigonia, Lowe 1843 [Caproidae]
  • Antigoniarcula, Elliot 1959 [Terebratulida]
  • Antiguamya [Myoida]
  • Antiguraleus [Neogastropoda]
  • Antigyroceras [Discosorida]
  • Antihomocrinus, Schmidt 1934 [Cladida]
  • Antijanira [Pterioida]
  • Antikinkaidia, Fedorowski 1973 [Pentaphyllidae]
  • Antillaster [Asterostomatidae]
  • Antillia, Duncan 1863 [Mussidae]
  • Antillocaprina, Trechmann 1924 [Caprinidae]
  • Antillocyathus, Wells 1937 [Caryophylliidae]
  • Antillophos, Woodring 1928 [Buccinidae]
  • Antillophyllia, Vaughan 1932 [Faviidae]
  • Antillosarcolites, Chubb 1968 [Antillocaprinidae]
  • Antilloseris, Vaughan 1905 [Calamophylliidae]
  • Antimelatoma, Powell 1942 [Turridae]
  • Antimitra [Neogastropoda]
  • Antineosteus, Lelievre 1984 [Placodermi]
  • Antinodulus [Neotaenioglossa]
  • Antinomia, Catullo 1851 [Pygopidae]
  • Antipatharia, order [Anthozoa]
  • Antipecten [Pterioida]
  • Antiphragmoceras, Foerste 1925 [Westonoceratidae]
  • Antiplanes [Drilliidae]
  • Antiplectoceras, Foerste and Savage 1927 [Barrandoceratidae]
  • Antiptychina [Zeilleriidae]
  • Antiquatonia, Miloradovich 1945 [Productidae]
  • Antiquicyprina, Casey 1952 [Arcticidae]
  • Antiquilima, Cox 1943 [Limidae]
  • Antirhynchonella [Clorindidae]
  • Antischmidtella [Palaeocopida]
  • Antisolarium, Finlay 1927 [Trochidae]
  • Antispirifer [Hysterolitidae]
  • Antistrix [Meganterididae]
  • Antistrixia [Rhynchonellida]
  • Antizafra [Neogastropoda]
  • Antizygospira [Atrypinidae]
  • Antliodus, Newberry and Worthen 1866 [Petalodontidae]
  • Antofagastaichthys, Arratia 1986 [Elopiformes]
  • Antognathus [Conodontophorida]
  • Antohipponicharion, Huo and Shu 1985 [Archaeocopida]
  • Antoneila [Arcida]
  • Antoniocoscinus [Ajacicyathida]
  • Antonoceras, Shimanskiy 1957 [Oncocerida]
  • Antracophyllum [Anthozoa]
  • Antrimpos, Munster 1839 [Penaeidae]
  • Antrispongia [Hexactinellida]
  • Antropora, Norman 1903 [Antroporidae]
  • Antutitrigonia [Trigoniida]
  • Anulatrypa [Atrypidae]
  • Anulipecten, Ruzicka et al. 1959 [Pterinopectinidae]
  • Anulocrinus, Ramsbottom 1961 [Crinoidea]
  • Anuloides, Ivshin 1962 [Ptychopariida]
  • Anulostrea, Vialov 1936 [Ostreidae]
  • Anx [Obolidae]
  • Anzalia, Termier 1947 [Problematica]
  • Aojia, Kobayashi 1935 [Lisaniidae]
  • Aorocrinus, Wachsmuth and Springer 1897 [Batocrinidae]
  • Aorograptus, Williams and Stevens 1991 [Dendroidea]
  • Aostipora [Trepostomida]
  • Aotagnostus, Opik 1979 [Agnostida]
  • Aoteadrillia, Powell 1942 [Turridae]
  • Apachia, Frederickson 1949 [Ptychopariida]
  • Aparchitella [Palaeocopida]
  • Aparchitellina [Palaeocopida]
  • Aparchites [Palaeocopida]
  • Aparchitocythere [Podocopida]
  • Apataxia [Neotaenioglossa]
  • Apatella [Conodontophorida]
  • Apateloschizocythere [Podocopida]
  • Apateopholis [Ichthyotringidae]
  • Apatobolbina, Ulrich and Bassler 1923 [Beyrichiidae]
  • Apatobolus [Obolidae]
  • Apatochilina [Palaeocopida]
  • Apatocythere [Podocopida]
  • Apatognathus [Conodontophorida]
  • Apatokephalina, Sivov 1955 [Asaphida]
  • Apatokephaloides, Raymond 1924 [Remopleurididae]
  • Apatokephalops, Lu 1975 [Remopleurididae]
  • Apatokephalus, Brögger 1896 [Remopleurididae]
  • Apatomorpha [Leptellinidae]
  • Apatopygus, Hawkins 1920 [Apatopygidae]
  • Apatorthis [Angusticardiniidae]
  • Apatoskenidioides [Orthida]
  • Apatotervia [Cyclostomata]
  • Apelismilia [Scleractinia]
  • Apertauroria [Foraminifera]
  • Apertirhynchella [Wellerellidae]
  • Apertostella [Fenestrata]
  • Aphaea [Cardiida]
  • Aphanaia, Koninck 1877 [Atomodesmatidae]
  • Aphanepygus, Bassini 1879 [Amiiformes]
  • Aphanites [Goniatitida]
  • Aphanomena, J. Bergstrom 1968 [Leptostrophiidae]
  • Aphanoptyxis, Cossmann 1896 [Heterostrophia]
  • Aphanotaenia [Heterostrophia]
  • Apheathyris [Athyridida]
  • Aphelaspis, Resser 1935 [Aphelaspididae]
  • Aphelecrinus, Kirk 1944 [Aphelecrinidae]
  • Aphelesia, Cooper 1959 [Basiliolidae]
  • Aphelocythere [Podocopida]
  • Aphelognathus [Conodontophorida]
  • Apheloides, Ivshin 1962 [Asaphida]
  • Aphelolepis, Heller 1953 [Semionotiformes]
  • Aphelotreta, Rowell 1980 [Acrotretidae]
  • Apheoorthina [Eoorthidae]
  • Apheoorthis, Ulrich and Cooper 1936 [Eoorthidae]
  • Aphera, H. Adams and A. Adams 1854 [Cancellariidae]
  • Aphetoceras, Hyatt 1894 [Estonioceratidae]
  • Aphia, Risso 1826 [Perciformes]
  • Aphlebospongia [Pharetronida]
  • Aphractus [Nautilida]
  • Aphragmites, Barrande 1865 [Ascoceratidae]
  • Aphragmus [Sellithyrididae]
  • Aphraxonia, Uensalaner 1951 [Disphyllidae]
  • Aphrikanecythere [Podocopida]
  • Aphrocallistes, Gray 1858 [Aphrocallistidae]
  • Aphrodina, Conrad 1869 [Veneridae]
  • Aphroelasma [Anthozoa]
  • Aphroidophyllum, Lenz 1961 [Ptenophyllidae]
  • Aphrophylloides, Pickett 1967 [Aphrophyllidae]
  • Aphrophyllum, Smith 1920 [Aphrophyllidae]
  • Aphrosalpinx [Aphrosalpingidae]
  • Aphyctoceras [Oncocerida]
  • Aphyllum, Soshkina 1937 [Tryplasmatidae]
  • Apicaria [Neotaenioglossa]
  • Apicilirella [Chilidiopsidae]
  • Apiocardia, Olsson 1961 [Cardiidae]
  • Apioceras, Fahrenkohl 1844 [Oncocerida]
  • Apiocrinites, Miller 1821 [Apiocrinitidae]
  • Apiocypraea, Schilder 1927 [Ovulidae]
  • Apiocystites [Rhombifera]
  • Apiograptus [Graptoloidea]
  • Apionicon [Cyclidae]
  • Apiotoma [Neogastropoda]
  • Apiotrigonia, Cox 1952 [Megatrigoniidae]
  • Apletosia [Terebratulidae]
  • Apleuroceras, A. Hyatt 1900 [Aplococeratidae]
  • Aplexura, Rozova 1963 [Liostracinidae]
  • Aploceras, d'Orbigny 1849 [Carbactinoceratidae]
  • Aplococeras, A. Hyatt 1900 [Aplococeratidae]
  • Aplocus [Archaeogastropoda]
  • Aplocyathus, d'Orbigny 1849 [Scleractinia]
  • Aplodinotus, Rafinesque 1818 [Sciaenidae]
  • Aplophyllia, D'Orbigny 1849 [Stylinidae]
  • Aplosmilia, d'Orbigny 1849 [Rhipidogyridae]
  • Aplosphecion [Pharetronida]
  • Aplotaspis, Henderson 1976 [Ceratopygidae]
  • Aplousina, Canu and Bassler 1927 [Calloporidae]
  • Aplustrum, Schumacher 1817 [Aplustridae]
  • Aplysinofibra [Demospongea]
  • Apocalymene, Chatterton and Campbell 1980 [Calymenidae]
  • Apocrinoceras, Teichert and Glenister 1954 [Protocycloceratidae]
  • Apocyathus [Cribricyathea]
  • Apodactylocrinus [Sagenocrinida]
  • Apodasmocrinus, Warn and Strimple 1977 [Crinoidea]
  • Apoderoceras [Coeloceratidae]
  • Apodosia, Smirnova and Mackinnon 1995 [Rhynchonellida]
  • Apogon, Lacpde 1802 [Perciformes]
  • Apogonoides, Bleeker 1849 [Perciformes]
  • Apographiocrinus, Moore and Plummer 1940 [Apographiocrinidae]
  • Apolectus, Cuvier and Valenciennes 1831 [Perciformes]
  • Apollonorthis [Plectorthidae]
  • Apolymetis, Salisbury 1929 [Tellinidae]
  • Apomatella [Clitambonitidae]
  • Apomodocia, Hu 1971 [Ptychopariida]
  • Apopentamerus [Pentameridae]
  • Apoplanias, Lochmann 1964 [Olenidae]
  • Aporolepas, Withers 1953 [Scalpellidae]
  • Aporosocyathus [Ajacicyathida]
  • Aporrhais, da Costa 1778 [Aporrhaidae]
  • Aporthophyla [Taffiidae]
  • Aporthophylina [Taffiidae]
  • Aposolenopleura, Raymond 1937 [Ptychopariida]
  • Apousiella [Mucrospiriferidae]
  • Apoxypetalum [Spatangoida]
  • Appalachignathus [Conodontophorida]
  • Appendicysta, Hahn and Yuan 1989 [Proetida]
  • Appisania [Neogastropoda]
  • Applinocrinus, Peck [Saccocomidae]
  • Aprathia, Hahn and Brauckmann 1975 [Proetida]
  • Apricardia [Requieniidae]
  • Apringia [Basiliolidae]
  • Apsendesia [Frondiporidae]
  • Apsidoceras, Hyatt 1884 [Apsidoceratidae]
  • Apsidognathus [Conodontophorida]
  • Apsilingula, Williams 1977 [Lingulidae]
  • Apsilus, Cuvier and Valenciennes 1830 [Perciformes]
  • Apsocalymma [Orthotetidae]
  • Apsopelix [Crossognathiformes]
  • Apsorroceras [Cephalopoda]
  • Apsotreta, Palmer 1954 [Acrotretidae]
  • Apterrinella [Cornuspiridae]
  • Aptilechinus [Echinocystitoida]
  • Aptocyathella [Ajacicyathida]
  • Aptocyathus [Ajacicyathida]
  • Aptychodon, Reuss 1855 [Sauropterygia]
  • Aptycholathyrus, Cossmann and Pissarro 1905 [Fasciolariidae]
  • Aptychopsis [Malacostraca]
  • Aptyxiella, P. Fischer 1885 [Nerineidae]
  • Aptyxis, Troschel 1865 [Fasciolariidae]
  • Apulites [Hippuritida]
  • Apurocrinus, McIntosh 1981 [Diplobathrida]
  • Aquilofusus, Kautsky 1925 [Fasciolariidae]
  • Aquilonites, Kusina 1974 [Intoceratidae]
  • Aquitanastraea, Chevalier 1954 [Faviidae]
  • Aquitanophyllia [Mussidae]
  • Arabella [Eunicemorpha]
  • Arabellites [Eunicemorpha]
  • Arabia [Neotaenioglossa]
  • Arabica [Neotaenioglossa]
  • Arabitrigonia [Trigoniida]
  • Aracana, Gray 1833 [Tetraodontiformes]
  • Arachnastraea, Yabe and Hayasaka 1916 [Yatsengiidae]
  • Arachnida, class, Lamarck 1801 [Chelicerata]
  • Arachnidium [Ctenostomata]
  • Arachniograptus [Graptoloidea]
  • Arachniophyllum, Smyth 1915 [Aulophyllidae]
  • Arachniopleurus [Glyphocyphidae]
  • Arachnocrinus, Meek and Worthen 1866 [Cladida]
  • Arachnocystites [Rhombifera]
  • Arachnoidella [Ctenostomata]
  • Arachnolasma, Grabau 1922 [Aulophyllidae]
  • Arachnolasmella, Bykova 1966 [Aulophyllidae]
  • Arachnophyllum, Dana 1846 [Arachnophyllidae]
  • Arachnopusia [Cheilostomata]
  • Araeocrinus, Strimple and Watkins 1969 [Cladida]
  • Araeodactylus [Neotaenioglossa]
  • Araeopleura [Hippuritida]
  • Araeopoma, Lindström 1883 [Goniophyllidae]
  • Araeopora, Etheridge and Nicholson 1879 [Cleistoporidae]
  • Araeosoma [Echinothuriidae]
  • Araeosteus, Jordan and Gilbert 1920 [Perciformes]
  • Aragonella [Foraminifera]
  • Aragonia [Foraminifera]
  • Araiophyllum, Cuif 1975 [Microsolenidae]
  • Araiopleura, Harrington and Leanza 1957 [Alsataspididae]
  • Araiostrotion, Guo 1965 [Cleistoporidae]
  • Arakaevella [Foraminifera]
  • Araksalosia [Araksalosiidae]
  • Aralocardia [Cardiida]
  • Aramichthys, Signeux 1959 [Perciformes]
  • Araneatrypa [Punctatrypidae]
  • Araneites, Bogoslovsky 1971 [Sporadoceratidae]
  • Araneograptus [Dendroidea]
  • Arapahoia, Miller 1936 [Plethopeltidae]
  • Araripichthys, R. Silva Santos 1985 [Araripichthyidae]
  • Araspirifer [Cyrtinopsidae]
  • Arathecus [Circothecida]
  • Aratidecthes, Schram 1969 [Aeschronectida]
  • Aratoechia [Trigonirhynchiidae]
  • Aratrocypris [Podocopida]
  • Arauzia, Mader 1986 [Ctenacanthiformes]
  • Araxoceras, Ruzhencev 1959 [Araxoceratidae]
  • Arbacia, Gray 1835 [Arbaciidae]
  • Arbacina, Pomel 1869 [Temnopleuroida]
  • Arbia, Cooke 1948 [Arbaciidae]
  • Arbizustrophia [Strophodontidae]
  • Arborocladia [Fenestrata]
  • Arbuscula [Demospongea]
  • Arca (Lissarca), E. A. Smith 1877 [Limopsidae]
  • Arcacythere [Podocopida]
  • Arcanoceras, Ruzhencev 1965 [Eogonioloboceratidae]
  • Arcavicula, Cox 1964 [Pteriidae]
  • Arcelinithyris [Lissajousithyrididae]
  • Arcestes, Suess 1865 [Arcestidae]
  • Arceythyris [Postepithyrididae]
  • Archaeagnostus, Kobayashi 1939 [Peronopsidae]
  • Archaealveolina [Alveolinidae]
  • Archaeaspis, Repina 1965 [Archaeaspididae]
  • Archaecyclus [Foraminifera]
  • Archaediscus [Archaediscidae]
  • Archaeglobigerina [Foraminifera]
  • Archaeoantennularia [Hydroida]
  • Archaeocalyptocrinus, Whitzke and Strimple 1981 [Monobathrida]
  • Archaeocarabus, McCoy 1849 [Palinuridae]
  • Archaeocaris, Meek 1872 [Palaeostomatopoda]
  • Archaeochintinia [Foraminifera]
  • Archaeochitosa [Allogromiidae]
  • Archaeoconularia [Scyphozoa]
  • Archaeoconus [Hypseloconida]
  • Archaeocothurnus [Cornuta]
  • Archaeocrinus, Wachsmuth and Springer 1881 [Diplobathrida]
  • Archaeocryptolaria [Hydroida]
  • Archaeocyathida, order, Okulitch 1935 [Irregulares]
  • Archaeocyathus [Archaeocyathida]
  • Archaeocypoda, Secretan 1975 [Dorippidae]
  • Archaeodictyomitra, E. A. Pessagno 1977 [Archaeodictyomitridae]
  • Archaeodictyota [Graptolithina]
  • Archaeodoryderma [Demospongea]
  • Archaeofenestella [Fenestrata]
  • Archaeogastropoda, order, J. Thiele 1925 [Gastropoda]
  • Archaeogeryon, Colosi 1924 [Geryonidae]
  • Archaeognathus [Conodontophorida]
  • Archaeohagiastrum, Baumgartner 1984 [Hagiastridae]
  • Archaeolafoea [Hydroida]
  • Archaeolamna, M. Siverson 1992 [Archaeolamnidae]
  • Archaeolasmogyra, Kolosvary 1957 [Scleractinia]
  • Archaeolepas, Zittel 1884 [Scalpellidae]
  • Archaeolynthus [Monocyathida]
  • Archaeomeson [Stenolaemata]
  • Archaeometra [Comatulida]
  • Archaeonectris [Hydroida]
  • Archaeonectrus, Novozhilov 1964 [Rhomaleosauridae]
  • Archaeoniscus [Isopoda]
  • Archaeopetasus [Problematica]
  • Archaeopharetra [Archaeocyathida]
  • Archaeophyllia, Beauvais 1972 [Reimaniphylliidae]
  • Archaeophyllum [Cribricyathea]
  • Archaeoplax, Stimpson 1863 [Retroplumidae]
  • Archaeoprion [Eunicemorpha]
  • Archaeopus, M. J. Rathbun 1908 [Retroplumidae]
  • Archaeopyramisa, Cheng 1986 [Latentifistulidae]
  • Archaeorthis [Archaeorthidae]
  • Archaeoscyphia, Hinde 1889 [Anthaspidellidae]
  • Archaeosepia [Sepiida]
  • Archaeosepta [Foraminifera]
  • Archaeosphaeroma [Isopoda]
  • Archaeostraca, order, Claus 1888 [Malacostraca]
  • Archaeosycon [Archaeocyathida]
  • Archaeotritrabs, Steiger 1992 [Tritrabidae]
  • Archaeotrypa [Anthozoa]
  • Archaeozaphrentis, Ivanovskiy 1959 [Streptelasmatidae]
  • Archaephippus, Blot 1969 [Perciformes]
  • Archaepyrgus [Isorophida]
  • Archaesphaera [Archaesphaeridae]
  • Archaetaxocrinus, Lewis 1981 [Taxocrinida]
  • Archaias, Montfort 1808 [Soritidae]
  • Archaiosteges [Aulostegidae]
  • Archarenicola [Drilomorpha]
  • Archeeucyrtis [Nassellaria]
  • Archegocystis [Diploporita]
  • Archegonaspis [Pteraspidomorphes]
  • Archelon, Weiland 1896 [Protostegidae]
  • Archendoceras [Yanhecerida]
  • Archeocosta [Podocopida]
  • Archeocuneocythere [Podocopida]
  • Archeocydippida [Ctenophora]
  • Archeolimulus [Xiphosurida]
  • Archeosolenocera, Carriol and Riou 1991 [Decapoda]
  • Archiacia, Agassiz 1847 [Archiaciidae]
  • Archiacina [Peneroplidae]
  • Archiacoceras, Foerste 1926 [Archiacoceratidae]
  • Archiclimacograptus [Graptoloidea]
  • Archicorys [Nassellaria]
  • Archicypraea [Neotaenioglossa]
  • Archicythereis [Podocopida]
  • Archierato [Neotaenioglossa]
  • Archimedes [Fenestellidae]
  • Archimediella, Sacco 1895 [Turritellidae]
  • Archimediella (Torculoidella), Sacco 1895 [Turritellidae]
  • Archiretiolites [Graptoloidea]
  • Archisymplectes [Nemertina]
  • Architectonica, Röding 1798 [Architectonicidae]
  • Archithelphusa [Decapoda]
  • Archivesica, Dall 1908 [Vesicomyidae]
  • Archoceras, Schindewolf 1937 [Gephuroceratidae]
  • Archocyrtium, Deflandre 1972 [Archocyrtiidae]
  • Archodus [Pteraspidomorphes]
  • Archypora, Chekhovich 1975 [Alveolitidae]
  • Arcinella, Schumacher 1817 [Chamidae]
  • Arcobelus [Belemnitida]
  • Arcocyathus [Anthozoa]
  • Arcoida, order, Stoliczka 1871 [Bivalvia]
  • Arcomya, Agassiz 1838 [Pholadomyidae]
  • Arcomytilus, Agassiz 1843 [Mytilidae]
  • Arcopagella, Meek 1871 [Tellinidae]
  • Arcopagia, Leach 1827 [Tellinidae]
  • Arcopaginula, Lamy 1918 [Tellinidae]
  • Arcopagiopsis [Cardiida]
  • Arcoperna, Conard 1865 [Mytilidae]
  • Arcoplasma [Anthozoa]
  • Arcopsis, Koenen 1885 [Noetiidae]
  • Arcoscalpellum, Hoek 1907 [Scalpellidae]
  • Arctangia, Wells 1937 [Rhizangiidae]
  • Arcthoplites [Hoplitidae]
  • Arctica, Schumacher 1817 [Arcticidae]
  • Arcticalymene, Adrain and Edgecombe 1997 [Calymenidae]
  • Arcticeramus [Pterioida]
  • Arcticoceras [Cadoceratidae]
  • Arctinurus, Castelnau 1843 [Lichidae]
  • Arctipeltis, Maksimova 1986 [Styginidae]
  • Arctipoora [Fenestrata]
  • Arctispira [Atrypinidae]
  • Arctites, Ljaschenko 1969 [Volynitidae]
  • Arctocephalites [Cadoceratidae]
  • Arctocephalus, F. Cuvier 1826 [Otariidae]
  • Arctoceras, Hyatt 1900 [Arctoceratidae]
  • Arctogymnites, Y. N. Popov 1962 [Beyrichitidae]
  • Arctohedra [Arctohedridae]
  • Arctohungarites, C. Diener 1916 [Longobarditidae]
  • Arctomeekoceras [Proptychitidae]
  • Arctomelon [Neogastropoda]
  • Arctomercaticeras [Hildoceratidae]
  • Arctomeristina [Meristellidae]
  • Arctomyalina [Pterioida]
  • Arctonema, Orvig 1969 [Arthrodiriformes]
  • Arctophyllum, Fedorowski 1975 [Cyathopsidae]
  • Arctopratulum [Cardiidae]
  • Arctoprionites [Prionitidae]
  • Arctoptychites, Y. V. Archipov et al. 1974 [Ptychitidae]
  • Arctosirenites, E. T. Tozer 1961 [Trachyceratidae]
  • Arctosomus, Berg 1941 [Pholidopleuriformes]
  • Arctostrea, Pervinquiere 1910 [Ostreidae]
  • Arctostroma, Yavorsky 1967 [Ferestromatoporidae]
  • Arctotirolites, Y. Popov 1963 [Xenodiscidae]
  • Arctotis, Bodylevsky 1960 [Oxytomidae]
  • Arcturellina, Chavan 1951 [Carditidae]
  • Arcualla [Dalmanellidae]
  • Arcuaria [Podocopida]
  • Arcuatothyris [Cnismatocentridae]
  • Arcuatula, Jousseaume 1919 [Mytilidae]
  • Arcullaea, Vokes 1949 [Glycymerididae]
  • Arcuolenellus [Olenellidae]
  • Arcuolimbus, Palmer 1955 [Llanoaspididae]
  • Arcyzona [Palaeocopida]
  • Ardeamya [Cardiida]
  • Ardennea [Palaeocopida]
  • Ardiodus, White 1931 [Perciformes]
  • Ardiviscus [Productidae]
  • Ardmosteges [Cyclacanthariidae]
  • Ardrossacyathus [Archaeocyathida]
  • Arduennella, Wenndorf 1990 [Phacopida]
  • Arduspirifer [Hysterolitidae]
  • Arechia, Cappetta 1983 [Myliobatiformes]
  • Areella, Erlang 1992 [Rhynchonellida]
  • Areia, Barrande 1868 [Cheiruridae]
  • Arellanella, Lochmann 1948 [Alokistocaridae]
  • Aremella [Archaeogastropoda]
  • Arenaciarcula [Terebrataliidae]
  • Arenagula [Foraminifera]
  • Arene, H. Adams and A. Adams 1854 [Turbinidae]
  • Arenicola [Drilomorpha]
  • Areniconulus [Hippocrepinidae]
  • Arenipiscis, Young 1981 [Arthrodiriformes]
  • Arenobulimina, Cushman 1927 [Globotextulariidae]
  • Arenodosaria, Finlay 1939 [Valvulinidae]
  • Arenogaudryina [Foraminifera]
  • Arenonionella [Foraminifera]
  • Arenoparrella [Foraminifera]
  • Arenosiphon [Hippocrepinidae]
  • Arenoturrispirillina [Ammodiscidae]
  • Arenovidalina [Involutinidae]
  • Areopsammia, Dietrich 1917 [Dendrophylliidae]
  • Areostrophia [Areostrophiidae]
  • Arestoceras [Brancoceratidae]
  • Aretograptus [Dendroidea]
  • Argalista, Iredale 1915 [Ataphridae]
  • Argella [Athyridida]
  • Argenticytheretta [Podocopida]
  • Argentiniceras [Cephalopoda]
  • Argentiproductus [Productellidae]
  • Argentopyge, Baldis 1972 [Phacopida]
  • Argillichthys [Alepisauriformes]
  • Argilloecia [Podocopida]
  • Argobuccinum, Bruguière 1792 [Ranellidae]
  • Argocheilus, Shimanskiy 1961 [Poterioceratidae]
  • Argodiscus [Isorophida]
  • Argolites, Renz 1939 [Trachyceratidae]
  • Argonauticeras, Anderson 1938 [Lytoceratidae]
  • Argopecten, Monterosato 1889 [Pectinidae]
  • Argopora [Cribrilinidae]
  • Argorhynx [Retziellidae]
  • Argosirenites, Y. N. Popov 1961 [Trachyceratidae]
  • Argovithyris [Lobothyrididae]
  • Argunaspis, Repina 1966 [Ptychopariida]
  • Argutastrea, Crickmay 1960 [Disphyllidae]
  • Argyripnus, Gilbert and Cramer 1897 [Stomiatiformes]
  • Argyrobessa [Neogastropoda]
  • Argyromya [Pholadomyida]
  • Argyropelecus, Cocco 1829 [Sternoptychidae]
  • Argyropeza, Melvill and Standen 1901 [Cerithiidae]
  • Argyrosomus, La Pylaie 1835 [Perciformes]
  • Argyrotheca, Dall 1900 [Megathyrididae]
  • Ariadnaria [Capulidae]
  • Arianites, G. v. Arthaber 1911 [Columbitidae]
  • Ariaspis, Wolfart 1974 [Damesellidae]
  • Aricoceras, Ruzhencev 1950 [Adrianitidae]
  • Arienigraptus [Graptoloidea]
  • Arieticeras, Seguenza 1885 [Hildoceratidae]
  • Arietites [Arietitidae]
  • Arietoceltites, C. Diener 1916 [Tropitidae]
  • Arikloedenia [Palaeocopida]
  • Ariomma, Jordan and Snyder 1904 [Perciformes]
  • Arionoceras, Barskov 1966 [Arionoceratidae]
  • Ariosoma, Swainson 1838 [Anguilliformes]
  • Arisaigia, McLearn 1918 [Malletiidae]
  • Arisostoma [Archaeogastropoda]
  • Arisphinctes [Cephalopoda]
  • Aristaluta [Ostracoda]
  • Aristerella [Archaeogastropoda]
  • Aristerella, Ulrich 1894 [Modiomorphidae]
  • Aristerostrophia [Neotaenioglossa]
  • Aristocaris [Arthropoda]
  • Aristoceras, Ruzhencev 1950 [Thalassoceratidae]
  • Aristoceratoides, Ruzhencev 1960 [Thalassoceratidae]
  • Aristocystites [Diploporita]
  • Aristoharpes, Whittington 1950 [Harpetidae]
  • Aristokainella, Zhiyi and Jinlin 1978 [Remopleurididae]
  • Aristophyllum, Bulvanker et al. 1975 [Disphyllidae]
  • Aristoptychites, C. Diener 1916 [Ptychitidae]
  • Aristozoe [Archaeostraca]
  • Aristozoe, Barrande 1868 [Isochilinidae]
  • Arites [Phyllodocemorpha]
  • Arius, Cuvier and Valenciennes 1840 [Ariidae]
  • Arkacrinus, Knapp 1969 [Arkacrinidae]
  • Arkanites, McCaleb et al. 1964 [Reticuloceratidae]
  • Arkonoceras, Flower 1945 [Cephalopoda]
  • Armagnostus, Howell 1937 [Agnostida]
  • Armalites, Chudinova 1964 [Roemeriidae]
  • Armatites, Becker 1993 [Tornoceratidae]
  • Armatobalanus [Cirripedia]
  • Armenina [Verbeekinidae]
  • Armenoceras, Foerste 1924 [Armenoceratidae]
  • Armenocrinus, Strimple and Horowitz 1971 [Cladida]
  • Armenostoma [Neotaenioglossa]
  • Armillopora [Trepostomida]
  • Armstrongia [Reticulosa]
  • Arnaudaster [Echinolampadidae]
  • Arnaudia [Hippuritida]
  • Arnaudiella [Foraminifera]
  • Arnheimograptus [Graptoloidea]
  • Arnioceltites, E. v. Mojsisovics 1893 [Tropiceltitidae]
  • Arnioceras [Arietitidae]
  • Arniotites [Arietitidae]
  • Arnoglossus, Bleeker 1862 [Pleuronectiformes]
  • Aromasithyris [Lobothyrididae]
  • Arossia, Newman 1982 [Balanidae]
  • Arpadites, E. v. Mojsisovics 1879 [Trachyceratidae]
  • Arpagodus, Trautschold 1879 [Agassizodontidae]
  • Arpaoceras, Zhuravleva 1962 [Pseudorthoceratidae]
  • Arraphus, Angelin 1854 [Ptychopariida]
  • Arrazocypris [Podocopida]
  • Arrchinella [Spumellaria]
  • Arrectoalatus, Nazarov and Ormiston 1985 [Corythoecidae]
  • Arrectocrinus, Knapp 1969 [Catacrinidae]
  • Arrhoges (Gabb 1868) [Aporrhaidae]
  • Arrythmocricus [Archaeocyathida]
  • Arsiriina [Palaeocopida]
  • Artchedella [Cryptostomata]
  • Artedius, Girard 1856 [Scorpaeniformes]
  • Arterioceras [Orthocerida]
  • Arthaberia [Astrophorida]
  • Arthaberites, C. Diener 1900 [Noritidae]
  • Arthessidae, family [Sacoglossa]
  • Arthricocephalus, Bergeron 1899 [Oryctocephalidae]
  • Arthritica, Finlay 1927 [Erycinidae]
  • Arthroacantha, Wlliams 1883 [Monobathrida]
  • Arthrochirotida, order [Holothuroidea]
  • Arthrochites, Chen 1982 [Hexangulaconulariidae]
  • Arthroclema, Billings 1862 [Arthrostylidae]
  • Arthrodira, order, Woodward 1891 [Placodermi]
  • Arthrophyllum, Beyrich 1850 [Lamellorthoceratidae]
  • Arthropoda, phylum, Latreille 1829 [Panarthropoda]
  • Arthropoma [Lacernidae]
  • Arthrorhachis, Hawle and Corda 1847 [Metagnostidae]
  • Arthrostyloecia [Cryptostomata]
  • Arthrostylus [Fenestrata]
  • Artichthyocrinus [Euryocrinidae]
  • Articularia, Luczkovska 1972 [Hauerinidae]
  • Articulina, d'Orbigny 1826 [Hauerinidae]
  • Artifactella [Podocopida]
  • Artigesia [Hippuritida]
  • Artimyctella [Problematica]
  • Artinksia (J. J. Sepkoski 2002) [Medlicottiidae]
  • Artioceras, Ruzhencev 1947 [Medlicottiidae]
  • Artioceratoides, Leonova 1985 [Medlicottiidae]
  • Artiotreta, Ireland 1961 [Scaphelasmatidae]
  • Artiscus [Spumellaria]
  • Artocapsa, Haeckel 1881 [Eucyrtidiidae]
  • Artokephalus, Sivov and Egorova 1955 [Asaphida]
  • Artoperina [Nassellaria]
  • Artophormis, Haeckel 1881 [Eucyrtidiidae]
  • Artospirifer [Spiriferida]
  • Artostrobium [Nassellaria]
  • Artostrobus, Haeckel 1887 [Acropyramididae]
  • Arturocyathus [Ajacicyathida]
  • Aruduce [Podocopida]
  • Aryballocrinus, Breimer 1962 [Monobathrida]
  • Arystidictyon [Reticulosa]
  • Arzelella [Pterioida]
  • Asa, Basterot 1825 [Veneridae]
  • Asanoina [Foraminifera]
  • Asanonella, Huang 1965 [Epistomariidae]
  • Asanospira [Haplophragmoididae]
  • Asaphechinus [Temnopleuroida]
  • Asaphellina, Chalmas and Bergeron 1989 [Taihungshaniidae]
  • Asaphellus, Callaway 1877 [Asaphidae]
  • Asaphiceras, Foerste 1928 [Oncoceratidae]
  • Asaphida, order, Fortey and Chatterton 1988 [Trilobita]
  • Asaphinella [Cardiida]
  • Asaphinoides [Cardiida]
  • Asaphis, Modeer 1793 [Psammobiidae]
  • Asaphiscus, Meek 1873 [Asaphiscidae]
  • Asaphoceras [Arietitidae]
  • Asaphocrinus [Sagenocrinida]
  • Asapholytoceras [Cephalopoda]
  • Asaphoon, Hutchison and Ingham 1967 [Asaphidae]
  • Asaphopsis, Mansuy 1920 [Taihungshaniidae]
  • Asaphopsoides, Hupé 1953 [Hungaiidae]
  • Asaphus, Brongniart 1822 [Asaphidae]
  • Asarcophyllum [Anthozoa]
  • Asbestoceras [Discosorida]
  • Ascalobos [Pachycormiformes]
  • Ascaulocardium, Pojeta and N. F. N. F 1987 [Clavagellidae]
  • Ascensovoluta [Neogastropoda]
  • Ascetocrinus, Kirk 1940 [Cladida]
  • Ascetoleberis [Podocopida]
  • Aschemocella [Aschemocellidae]
  • Asciocythere [Podocopida]
  • Ascionepea, Opik 1967 [Ptychopariida]
  • Ascitellina [Cardiida]
  • Ascoceras, Barrande 1847 [Ascoceratidae]
  • Ascocerida, order, Kuhn 1949 [Cephalopoda]
  • Ascocystites, Barrande 1887 [Ascocystitida]
  • Ascocystitida, order [Eocrinoidea]
  • Ascodictyon [Ascodictyidae]
  • Ascograptus [Graptolithina]
  • Ascolatirus [Fasciolariidae]
  • Ascoliella [Foraminifera]
  • Ascopeltis [Proetida]
  • Ascopora [Rhabdomesidae]
  • Ascosyrinx [Problematica]
  • Aseptalium [Innaechiidae]
  • Aseptella [Productellidae]
  • Aseptirhynchia [Aseptorhynchiidae]
  • Aseptonetes [Chonetidae]
  • Aserotaspis [Pteraspidomorphi]
  • Asiagena, Maksimova 1975 [Brachymetopidae]
  • Asiarhynchia, Su 1980 [Rhynchonellida]
  • Asiatella, Repina 1964 [Ellipsocephalidae]
  • Asiatotrigonia [Trigoniida]
  • Asilluchus, Opik 1963 [Ptychopariida]
  • Asima, Giebel 1848 [Perciformes]
  • Asineops, Cope 1870 [Actinopteri]
  • Asiocephalus, Palmer 1968 [Ceratopygidae]
  • Askeatonolucidum [Nautilida]
  • Askepasma, Laurie 1986 [Cryptotretidae]
  • Askeptosaurus, Nopcsa 1925 [Askeptosauridae]
  • Asketaspis [Pteraspidomorphes]
  • Asklepioceras, O. Renz 1911 [Trachyceratidae]
  • Asoella, Tokuyama 1959 [Heteropectinidae]
  • Aspasmophyllum, C. F. Roemer 1880 [Halliidae]
  • Aspella, Mörch 1877 [Muricidae]
  • Aspeluindia [Conodontophorida]
  • Asperdaphne [Neogastropoda]
  • Asperilla [Cirridae]
  • Asperocare, Paulson 1958 [Corynexochida]
  • Asperophyllum, Spasskiy 1964 [Cystiphyllidae]
  • Asperopora [Trepostomida]
  • Asphinctites [Cephalopoda]
  • Aspidaeglina, Holub 1911 [Cyclopygidae]
  • Aspidagnostus, Whitehouse 1936 [Clavagnostidae]
  • Aspidichthys, Newberry 1873 [Arthrodira]
  • Aspidiscus, Koenig 1825 [Cyclolitidae]
  • Aspidocarpus [Mitrata]
  • Aspidoceras, Zittel [Cephalopoda]
  • Aspidocrinus, Hall 1858 [Cyrtocrinida]
  • Aspidogaster [Decapoda]
  • Aspidograptus [Dendroidea]
  • Aspidopholas, Fischer 1887 [Pholadidae]
  • Aspidopora [Trepostomida]
  • Aspidostephanus [Cephalopoda]
  • Aspidosteus [Pteraspidomorphes]
  • Aspidostoma [Cheilostomata]
  • Aspidothyris [Dielasmatidae]
  • Aspinoceras [Cephalopoda]
  • Aspinosella [Productidae]
  • Assatkinella [Stenolaemata]
  • Asselodiscus [Foraminifera]
  • Asserculinia, Schouppé and Stacul 1959 [Metriophyllidae]
  • Assilina [Nummulitidae]
  • Astacodes, Bell 1863 [Palinuridae]
  • Astacolus, de Montfort 1808 [Vaginulinidae]
  • Astacopsis, Huxley 1879 [Parastacidae]
  • Astacus, Fabricius 1775 [Astacidae]
  • Astandes [Maturifusidae]
  • Astarte, J. Sowerby 1816 [Astartidae]
  • Astartellopsis, Beurlen 1954 [Astartidae]
  • Astartemya, L. W. Stephenson 1941 [Astartidae]
  • Astartopis [Cardiida]
  • Astartopsis [Cardiida]
  • Astele, Swainson 1855 [Trochidae]
  • Astenaspis [Redlichiida]
  • Asteracmea, Oliver 1926 [Acmaeidae]
  • Asteractinella [Heteractinida]
  • Asterigerina, d'Orbigny 1839 [Asterigerinidae]
  • Asterigerinata [Foraminifera]
  • Asterigerinella [Foraminifera]
  • Asterigerinoides [Foraminifera]
  • Asteroammonia [Foraminifera]
  • Asteroarchaediscus [Archaediscidae]
  • Asterobillingsia, Oliver 1974 [Eridophyllidae]
  • Asteroblastus [Diploporita]
  • Asterocalyx [Demospongea]
  • Asteroceras [Arietitidae]
  • Asterocidaris [Hemicidaridae]
  • Asteroconus [Hydroconozoa]
  • Asterocyathus [Ajacicyathida]
  • Asterocyclina [Foraminifera]
  • Asterocystis [Diploporita]
  • Asterodisphyllum [Anthozoa]
  • Asterohedbergella [Foraminifera]
  • Asterohelix [Archaeogastropoda]
  • Asterolepidina [Foraminifera]
  • Asterophragmina [Foraminifera]
  • Asteropyge, Hawle and Corda 1847 [Acastidae]
  • Asterorbis [Foraminifera]
  • Asterorotalia [Foraminifera]
  • Asterosalpinx [Serpulimorpha]
  • Asterosmilia, Duncan 1867 [Caryophylliidae]
  • Asterospongia [Demospongea]
  • Asterosteus, Newberry 1875 [Rhenaniformes]
  • Asterostoma [Asterostomatidae]
  • Asterotumulus [Ajacicyathida]
  • Asthenoceras [Sonniniidae]
  • Asthenocormus [Pachycormidae]
  • Asthenophyllum, Grubbs 1939 [Streptelasmatidae]
  • Asthenopsis, Whitehouse 1939 [Ptychopariidae]
  • Asthenosoma [Echinothuriidae]
  • Asthenotoma, Harris and Burrows 1891 [Turridae]
  • Astiericeras [Cephalopoda]
  • Astieridiscus [Cephalopoda]
  • Astoceras [Actinocerida]
  • Astraborthis [Anomalorthidae]
  • Astractura [Spumellaria]
  • Astraea, Röding 1798 [Turbinidae]
  • Astraeoconus [Heteractinida]
  • Astraeofungia, Alloiteau 1952 [Latomeandridae]
  • Astraeomorpha, Reuss 1854 [Astraeomorphidae]
  • Astraeophyllum, Nicholson and Hinde 1874 [Anthozoa]
  • Astralium, Link 1807 [Turbinidae]
  • Astralochoma [Trepostomida]
  • Astrangia, Milne-Edwards and Haime 1848 [Rhizangiidae]
  • Astraraea, Felix 1900 [Astraraeidae]
  • Astraspidiformes, order, Berg 1940 [Pteraspidomorphi]
  • Astreopora, Blainville 1830 [Acroporidae]
  • Astreptoceras [Cephalopoda]
  • Astreptoscolex [Phyllodocemorpha]
  • Astrhelia, Milne-Edwards and Haime 1849 [Oculinidae]
  • Astrictophyllum, Spasskiy 1971 [Stauriidae]
  • Astrobolia, Zittel 1878 [Azoricidae]
  • Astrocerium, Hall 1851 [Favositidae]
  • Astrocladia, Zittel 1878 [Astrocladiidae]
  • Astrococcus [Spumellaria]
  • Astrocoenia, Milne-Edwards and Haime 1848 [Astrocoeniidae]
  • Astroconia [Reticulosa]
  • Astrocrinites, Conrad 1840 [Fissiculata]
  • Astrocrinus, J. Morris 1843 [Fissiculata]
  • Astrocyclia [Spumellaria]
  • Astrocystites [Edrioasterida]
  • Astrodapsis [Echinarachniidae]
  • Astroentactinia, Nazarov 1975 [Entactiniidae]
  • Astrogyra, Felix 1900 [Placocoeniidae]
  • Astroides, Quoy and Gaimard 1827 [Dendrophylliidae]
  • Astrolemma [Demospongea]
  • Astrolithium [Acantharia]
  • Astromma [Spumellaria]
  • Astronesthes, Richardson 1845 [Stomiatiformes]
  • Astrononion, Cushman and Edwards 1927 [Nonionidae]
  • Astropegma, Pomel 1872 [Ventriculitidae]
  • Astropentagnathus [Conodontophorida]
  • Astrophacus, Haeckel 1881 [Heliodiscidae]
  • Astrophorida, order [Demospongea]
  • Astroproetus, Begg 1939 [Proetidae]
  • Astrorhiza [Astrorhizidae]
  • Astrorotalia [Foraminifera]
  • Astrosclerida [Axinellida]
  • Astrosestrum [Spumellaria]
  • Astrostylopsis, Germovsek 1954 [Actinostromariidae]
  • Astrovidictya [Cryptostomata]
  • Astroviella [Trepostomida]
  • Astroviellina [Trepostomida]
  • Astua [Trigonirhynchiidae]
  • Asturiella [Podocopida]
  • Asturiphyllum [Anthozoa]
  • Asturistrophia [Strophodontidae]
  • Asturoceras, Ruzhencev and Bogoslovskaya 1969 [Dimorphoceratidae]
  • Astutorhyncha [Camarotoechiidae]
  • Astya, Stechow 1921 [Stylasterina]
  • Astycoryphe, Richter 1919 [Tropidocoryphidae]
  • Astylomanon [Demospongea]
  • Astylospongia, Roemer 1860 [Astylospongiidae]
  • Astylospongiella, Rigby and Lenz 1978 [Astylospongiidae]
  • Astyris, H. Adams and A. Adams 1853 [Columbellidae]
  • Asymmetricythere [Podocopida]
  • Asymmetrina [Foraminifera]
  • Asymmetrochonetes [Strophochonetidae]
  • Asymmetrocrinus, Wanner 1937 [Cladida]
  • Asymphylotoechia [Polytoechiidae]
  • Asymptoceras, Ryckholt 1852 [Aipoceratidae]
  • Asyrinx [Syringothyrididae]
  • Asyrinxia [Syringothyrididae]
  • Atacama [Cheilostomata]
  • Atacamichthyss [Pachycormiformes]
  • Atactocrinus, Goldring 1923 [Diplobathrida]
  • Atactolituola [Haplophragmoiidae]
  • Atactopora [Trepostomida]
  • Atactoporella [Trepostomida]
  • Atactoporidra [Cheilostomata]
  • Atactosia [Sellithyrididae]
  • Atactotoechus [Atactotoechidae]
  • Atactus [Echinidae]
  • Atagma [Cyclostomata]
  • Ataktaspis, Lochman and Duncan 1944 [Corynexochida]
  • Atalacmea, Iredale 1915 [Patellogastropoda]
  • Atalantia [Trigoniida]
  • Ataphropsis [Archaeogastropoda]
  • Ataphrus, Gabb 1869 [Ataphridae]
  • Atavograptus [Graptoloidea]
  • Ataxioceras [Cephalopoda]
  • Ataxiocyathus [Archaeocyathida]
  • Ataxocerithium, Tate 1893 [Cerithiidae]
  • Ataxoorbignyna [Foraminifera]
  • Ataxophragmium [Ataxophragmiidae]
  • Ataxotrochus [Neotaenioglossa]
  • Atdabanella, Repina 1965 [Dorypygidae]
  • Atdabanithes [Hyolithida]
  • Atelaspidiformes, order [Cephalaspidomorphi]
  • Atelaspis [Atelaspidiformes]
  • Atelecyclus, Leach 1814 [Atelecyclidae]
  • Atelelasma, Cooper 1956 [Clitambonitidae]
  • Atelelasmoidea [Gonambonitidae]
  • Ateleocystites, Lindstrm 1888 [Anomalocystitidae]
  • Ateleopus, Agassiz 1846 [Lampridiformes]
  • Atelesopora [Cyclostomata]
  • Atelestocrinus, Wachsmuth and Springer 1886 [Cladida]
  • Atelikamara [Hemisphaeramminidae]
  • Atelithyris [Harpotothyrididae]
  • Atelodictyon, Lecompte 1951 [Atelodictyidae]
  • Atelospatangus [Spatangidae]
  • Atergatis, De Haan 1835 [Xanthidae]
  • Athabascacrinus, Laudon and Parks 1952 [Monobathrida]
  • Athabaschia [Petasmariidae]
  • Athabaskiella, Kobayashi 1942 [Dolichometopidae]
  • Athanatoceras [Discosorida]
  • Athenaegis, Soehn and Wilson 1990 [Pteraspidomorphes]
  • Atheresthes, Jordan and Gilbert 1881 [Pleuronectiformes]
  • Atheriniformes, order, Rosen 1966 [Actinopteri]
  • Atherinopsis, Girard 1854 [Atheriniformes]
  • Athleta, Conrad 1853 [Volutidae]
  • Athlocrinus, Moore and Plummer 1940 [Laudonocrinidae]
  • Athrophragma [Cryptostomata]
  • Athyrhynchus, Johnson 1973 [Septalariidae]
  • Athyris [Athyrididae]
  • Athyrisina [Athyrididae]
  • Athyrisinoides, Chen and Wan 1979 [Athyrididae]
  • Athyrisinopsis [Athyrididae]
  • Atilia, H. Adams and A. Adams 1853 [Columbellidae]
  • Atira, Stewart 1926 [Trochidae]
  • Atjehella [Podocopida]
  • Atkinsonella [Neogastropoda]
  • Atlanta, Lesueur 1817 [Atlantidae]
  • Atlanticocoelia, Koch 1996 [Rhynchonellata]
  • Atlanticythere, Benson 1977 [Trachyleberididae]
  • Atlantida [Plectorthidae]
  • Atlantidosteus, Lelievre 1984 [Arthrodiriformes]
  • Atlantobellerophon, Trechmann 1930 [Bellerophontida]
  • Atlantoceras, Bensaid 1974 [Atlantoceratidae]
  • Atlantochelys, Agassiz 1849 [Testudines]
  • Atlasaster [Pygasteroida]
  • Atokacrinus, Knapp 1969 [Paradelocrinidae]
  • Atoma [Neogastropoda]
  • Atomoceras [Oncocerida]
  • Atopacanthus, Hussakof and Bryant 1920 [Ischnacanthida]
  • Atopasaphus, Shergold 1971 [Asaphida]
  • Atopechinus [Arbaciidae]
  • Atopocephala, Brough 1934 [Brookvaliidae]
  • Atopoceras, Kilian 1889 [Heteroceratidae]
  • Atopocrinus, Clark 1912 [Crinoidea]
  • Atopograptus [Graptoloidea]
  • Atopostroma, Yang and Dong 1979 [Syringostromatidae]
  • Atops, Emmons 1844 [Atopidae]
  • Atractites [Xiphoteuthididae]
  • Atractocrinus, Kirk 1948 [Cladida]
  • Atractopyge, Hawle and Corda 1847 [Encrinuridae]
  • Atractosella, Hinde 1887 [Alcyonacea]
  • Atractosoecia, Canu 1922 [Cyclostomata]
  • Atractotrema, Cossmann 1888 [Fissurellidae]
  • Atraktus, Gardner 1937 [Volutidae]
  • Atrapocrinus, Strimple 1975 [Cladida]
  • Atratebia, Shergold 1975 [Trilobita]
  • Atremacrinus, Wanner 1929 [Cladida]
  • Atresius [Neotaenioglossa]
  • Atreta, Etallon 1862 [Dimyidae]
  • Atribonium [Stenoscismatidae]
  • Atrina, Gray 1842 [Pinnidae]
  • Atrochaetetes, Cuif and Fischer 1974 [Ceratoporellidae]
  • Atropicaris [Conchyliocarida]
  • Atrypa, Dalman 1828 [Atrypidae]
  • Atryparia [Atrypidae]
  • Atrypella [Lissatrypidae]
  • Atrypellina [Lissatrypidae]
  • Atrypida, order, Rzhonsnitskaya 1960 [Rhynchonellata]
  • Atrypina [Atrypinidae]
  • Atrypinella [Punctatrypidae]
  • Atrypinopsis [Atrypinidae]
  • Atrypoidea, Mitchell and Dun 1920 [Lissatrypidae]
  • Atrypopsis [Septatrypidae]
  • Atrypunculus [Atrypidae]
  • Atrythyris [Athyrididae]
  • Atsabites, Haniel 1915 [Paragastrioceratidae]
  • Attenuata, Hedley 1918 [Rissoidae]
  • Atterdagia [Palaeocopida]
  • Attiliosa, Emerson 1968 [Muricidae]
  • Attinopora [Cyclostomata]
  • Attungaia, Pickett 1969 [Astylospongiidae]
  • Aturia, Bronn 1838 [Nautilidae]
  • Aturoidea, Vredenburg 1925 [Hercoglossidae]
  • Atwillina [Foraminifera]
  • Atyphocrinus, Ulrich 1925 [Crinoidea]
  • Atys, Montfort 1810 [Haminoeidae]
  • Aubertianella [Spirotrichia]
  • Aubignyna, Margerel 1989 [Rotaliina]
  • Aucellina, Pompeckj 1901 [Buchiidae]
  • Auchenopora [Cheilostomata]
  • Auchmerella [Araksalosiidae]
  • Audaxlytoceras [Lytoceratidae]
  • Audienusina [Foraminifera]
  • Augea [Pterioida]
  • Augurites [Agoniatitida]
  • Augustoceras, R.H. Flower 1946 [Valcouroceratidae]
  • Aulacatrypa [Lissatrypidae]
  • Aulacella [Rhipidomellidae]
  • Aulacera [Aulaceratidae]
  • Aulacoceras [Aulacoceratidae]
  • Aulacocerida, order [Cephalopoda]
  • Aulacodigma, Opik 1967 [Ptychopariida]
  • Aulacofusus [Buccinidae]
  • Aulacognathus [Conodontophorida]
  • Aulacomya, Mörch 1853 [Mytilidae]
  • Aulacomyella, Furlani 1910 [Posidoniidae]
  • Aulaconautilus, Spath 1927 [Paracenoceratidae]
  • Aulacophoria [Schizophoriidae]
  • Aulacophyllum, Milne-Edwards and Haime 1850 [Halliidae]
  • Aulacopleura, Hawle and Corda 1847 [Aulacopleuridae]
  • Aulacopleurina, Pribyl 1949 [Eodrevermanniinae]
  • Aulacopleurum [Trigoniida]
  • Aulacopsis [Palaeocopida]
  • Aulacosia [Hexactinosa]
  • Aulacosphinctes [Himalayitidae]
  • Aulacosphinctoides [Perisphinctidae]
  • Aulacospongia [Demospongea]
  • Aulacostephanus [Cephalopoda]
  • Aulacoteuthis [Belemnitida]
  • Aulacothyris, Douville 1880 [Zeilleriidae]
  • Aulacothyropsis [Aulacothyropsidae]
  • Aulakolepos [Turrilepadida]
  • Aulasimoceras [Cephalopoda]
  • Aulastraea, Ogilvie 1897 [Amphiastreidae]
  • Aulastraeopora, Prever 1909 [Aulastraeoporidae]
  • Aulatornoceras, Schindewolf 1922 [Tornoceratidae]
  • Aulaxinia, Zittel 1878 [Siphoniidae]
  • Aulechinus [Lepidocentridae]
  • Aulica, Gray 1847 [Volutidae]
  • Aulicina, Roverato 1929 [Volutidae]
  • Aulidospira [Meristidae]
  • Aulie [Hesperomenidae]
  • Auliela, Nazarov 1977 [Anakrusidae]
  • Aulina, Smith 1917 [Lithostrotionidae]
  • Auliscocyathus [Archaeocyathida]
  • Auliskocrinus, Broadhead 1981 [Dichocrinidae]
  • Aulites [Cryptoporidae]
  • Aulocaulis, Fenton and Fenton 1937 [Auloporidae]
  • Auloclisia, Lewis 1927 [Aulophyllidae]
  • Auloconus, Piller 1978 [Involutinidae]
  • Aulocopella, Rauff 1895 [Anthaspidellidae]
  • Aulocopina [Demospongea]
  • Aulocopium, Oswald 1847 [Streptosolenidae]
  • Aulocricus [Ajacicyathida]
  • Aulocrinus, Wachsmuth and Springer 1897 [Cladida]
  • Aulocyclus [Calcarea]
  • Aulocystella, Kuzina 1955 [Aulocystidae]
  • Aulocystis, Schlüter 1885 [Aulocystidae]
  • Aulocytheridea [Podocopida]
  • Aulodesocrinus, Wright 1942 [Cladida]
  • Aulodomus, Schrammen 1937 [Euretidae]
  • Aulograptus [Graptoloidea]
  • Aulokoninckophyllum, Sando 1976 [Lithostrotionidae]
  • Aulonotreta [Aulonotretidae]
  • Aulophax [Lychniscosa]
  • Aulophyllum, Milne-Edwards and Haime 1850 [Aulophyllidae]
  • Aulopiformes, order, Rosen 1973 [Actinopteri]
  • Aulopora, Goldfuss 1829 [Auloporidae]
  • Auloporella, Grubbs 1939 [Auloporidae]
  • Auloprotonia [Productidae]
  • Aulopus, Cloquet 1816 [Aulopidae]
  • Aulorhamphus, Zigno 1890 [Gasterosteiformes]
  • Aulorhynchus, Gill 1861 [Gasterosteiformes]
  • Aulosmilia, Alloiteau 1952 [Meandrinidae]
  • Aulosoma [Demospongea]
  • Aulospongia [Calcarea]
  • Aulostegites, Lejeune and Pel 1973 [Aulocystidae]
  • Aulostomoides, Blot 1981 [Gasterosteiformes]
  • Aulostomus, Lacpde 1803 [Aulostomes]
  • Aulostrotion [Anthozoa]
  • Aulostylus, Sando 1976 [Lithostrotionidae]
  • Aulotortus, Weynschenk 1956 [Involutinidae]
  • Aulozoa, Grubbs 1939 [Auloporidae]
  • Aupouria, Powell 1937 [Philobryidae]
  • Aurelianella, Cossmann 1893 [Diastomatidae]
  • Aureocrinus, Prokop 1982 [Crinoidea]
  • Auriala [Neotaenioglossa]
  • Auriculatella, Tan 1980 [Archaeocopida]
  • Aurigerites [Bufinidae]
  • Aurila [Hemicytheridae]
  • Aurina [Neogastropoda]
  • Auristomia, Monterosato 1884 [Heterostrophia]
  • Auritama, Opik 1976 [Asaphida]
  • Auroria [Foraminifera]
  • Auroria [Stromatoporoidea]
  • Auseria [Archaeogastropoda]
  • Ausia, G. Hahn and H. D. Pflug 1985 [Cnidaria]
  • Aussites [Aulacocerida]
  • Austinella, Foerste 1909 [Plaesiomyidae]
  • Austinoceras, Foerste 1934 [Acleistoceratidae]
  • Austinocrinus, Loriol 1889 [Isselicrinidae]
  • Austinvillia, Resser 1938 [Ptychopariidae]
  • Austracuculiaea [Arcida]
  • Australanthus [Faujasiidae]
  • Australiarcula [Bouchardiidae]
  • Australicythere [Podocopida]
  • Australina [Lissatrypidae]
  • Australirhynchia [Machaerariidae]
  • Australobollia [Palaeocopida]
  • Australobuchia [Buchiidae]
  • Australocoelia [Leptocoeliidae]
  • Australoconularia [Scyphozoa]
  • Australocystis [Mitrata]
  • Australoecia [Podocopida]
  • Australofenestella [Fenestrata]
  • Australoharpes, Harrington and Leanza 1957 [Harpetidae]
  • Australokaskia, B.A. Engel and N. Morris 1994 [Proetidae]
  • Australolaxispira [Neotaenioglossa]
  • Australolepis [Thelodontiformes]
  • Australoneilo, Zinsmeister 1984 [Malletiidae]
  • Australophyllum, Stumm 1949 [Ptenophyllidae]
  • Australopolypora [Fenestrata]
  • Australops, Baldis 1972 [Phacopida]
  • Australopsis [Ostracoda]
  • Australopyge, Harrington and Leanza 1957 [Asaphidae]
  • Australosia [Araksalosiidae]
  • Australosomus, Pivetau 1930 [Pholidopleuridae]
  • Australospirifer [Hysterolitidae]
  • Australostrophia [Strophochonetidae]
  • Austriacopsis, Haber 1932 [Fissurellidae]
  • Austriellula, Strand 1928 [Norellidae]
  • Austriocaris [Conchyliocarida]
  • Austrirhynchia [Austrirhynchidae]
  • Austrisaturnalis, Kozur and Mostler 1972 [Multiarcusellidae]
  • Austroaporrhais [Neotaenioglossa]
  • Austrobalanus, Pilsbry 1916 [Cirripedia]
  • Austroblastus, Mckellar 1969 [Fissiculata]
  • Austrocardium, Freneix 1978 [Cardiidae]
  • Austroceratites, Wegner 1957 [Ceratitidae]
  • Austrochiton [Neoloricata]
  • Austrochoristites [Spiriferidae]
  • Austrocidaris, Clark 1907 [Cidaroida]
  • Austroclavus, Powell 1942 [Turridae]
  • Austroclupea, Bardack 1961 [Clupeiformes]
  • Austrocochlis, Finlay 1937 [Naticidae]
  • Austrocolomi [Foraminifera]
  • Austrocypraea [Neotaenioglossa]
  • Austrodosinia, Dall 1902 [Veneridae]
  • Austrodrillia, Hedley 1918 [Turridae]
  • Austrofusus, Kobelt 1879 [Buccinidae]
  • Austroharpa, Finlay 1931 [Harpidae]
  • Austrohedra [Eoorthidae]
  • Austrolepidotus [Semionotiformes]
  • Austrolithes [Neogastropoda]
  • Austromacoma [Cardiida]
  • Austromegabalanus [Cirripedia]
  • Austromitra, Finlay 1927 [Costellariidae]
  • Austromytilus, Laseron 1956 [Mytilida]
  • Austronoplia [Chonetidae]
  • Austrophycis, Ogilby 1897 [Gadiformes]
  • Austropleuropholis [Pachycormiformes]
  • Austrosassia [Ranellidae]
  • Austroscintilla [Cardiida]
  • Austrosinia, Zhang and Jell 1987 [Solenopleuridae]
  • Austrosphaera, Camacho 1949 [Neogastropoda]
  • Austrospirifer [Cyrtospiriferidae]
  • Austroteuthis [Aulacocerida]
  • Austrothyris [Terebratellidae]
  • Austrotoma, Finlay 1924 [Turridae]
  • Austrotrigonia [Trigoniida]
  • Austrotrillina [Austrotrillinidae]
  • Austrotriton [Neotaenioglossa]
  • Austrotrophon, Dall 1902 [Muricidae]
  • Austrovenus, Finlay 1926 [Veneridae]
  • Autoloxolichas, Phleger 1936 [Lichidae]
  • Avalanchurus, Edgecom and Chatte 1993 [Encrinuridae]
  • Avalonia, Walcott 1889 [Trilobita]
  • Avascutellum, Snajdr 1989 [Trilobita]
  • Avellana, d'Orbigny 1842 [Ringiculidae]
  • Averianowograptus [Graptoloidea]
  • Aversovalva [Podocopida]
  • Avesnella [Foraminifera]
  • Aveyroniceras [Dactylioceratidae]
  • Aviacypris [Podocopida]
  • Avicenia, Leleshus 1974 [Proheliolitidae]
  • Avichlamys [Pterioida]
  • Avicularca [Pterioida]
  • Avicularium [Cardiidae]
  • Aviculocardium [Cardiida]
  • Aviculocephaloconus [Mollusca]
  • Aviculolima, Philippi 1900 [Limidae]
  • Aviculomya [Bivalvia]
  • Aviculomyalina, Assman 1916 [Myalinidae]
  • Aviculoperna [Pterioida]
  • Aviculovulsa [Pterioida]
  • Avilionella, Flower 1952 [Barrandoceratidae]
  • Avimactra, Andrussov 1905 [Mactridae]
  • Avisyrinx [Strophopleuridae]
  • Avitolabrax, Takai 1942 [Perciformes]
  • Avitoluvarus, Bannikov and Tyler 1995 [Perciformes]
  • Avoceras, J. J. Sepkoski 2002 [Bassleroceratidae]
  • Avonia [Productellidae]
  • Avonina, Lochman 1936 [Ptychopariida]
  • Awateria, Suter 1917 [Turridae]
  • Awhea [Nodosariidae]
  • Axinellida, order, Bergquist 1967 [Demospongea]
  • Axinola, Hertlein and Grant 1972 [Glycymerididae]
  • Axinolobus, Gordon 1960 [Welleritidae]
  • Axinopsida [Thyasiridae]
  • Axinulus, Verrill and Bush 1898 [Thyasiridae]
  • Axinura, Castelnau 1843 [Anthozoa]
  • Axiodeaneia [Rhynchotetradidae]
  • Axiopolina [Hauerinidae]
  • Axiothea [Conodontophorida]
  • Axiphoria, Cherepnina 1960 [Streptelasmatidae]
  • Axius, Leach 1816 [Axiidae]
  • Axoclisia, Semenoff-Tian-Chansky 1974 [Aulophyllidae]
  • Axocricophyllum [Anthozoa]
  • Axocyathus, Alloiteau 1952 [Caryophylliidae]
  • Axogaster, Lonsdale 1850 [Gorgonacea]
  • Axolasma, Ivanovskiy 1963 [Streptelasmatidae]
  • Axolithophyllum, Fomichev 1953 [Geyerophyllidae]
  • Axonoceras, Stephenson 1941 [Nostoceratidae]
  • Axophyllum, Milne-Edwards and Haime 1850 [Axophyllidae]
  • Axopora [Milleporina]
  • Axoporella [Milleporina]
  • Axoprunum, Haeckel 1887 [Saturnalidae]
  • Axosmilia, Milne-Edwards and Haime 1848 [Axosmiliidae]
  • Axuolites, Sharkova 1963 [Alveolitidae]
  • Axymene [Neogastropoda]
  • Ayalaina [Meandropsinidae]
  • Aysheaia [Onychophora]
  • Azamella [Trigonirhynchiidae]
  • Azor [Solecurtidae]
  • Azorica, Carter 1873 [Azoricidae]
  • Azorinus, Récluz 1869 [Solecurtidae]
  • Azumapecten [Pectinidae]
  • Azygidium [Productellidae]
  • Azygocrinus, Lane 1963 [Monobathrida]
  • Azygograptus, Nicholson and Lapworth 1875 [Graptoloidea]
  • Azyricyathus [Cribricyathea]
  • Azyrtalia [Hexactinellida]
  • Babakovia, Sivov 1955 [Corynexochida]
  • Babelispirillina [Foraminifera]
  • Babella, Dall & Bartsch 1906 [Heterostrophia]
  • Babina [Strophochonetidae]
  • Babinka, Barrande 1881 [Babinkidae]
  • Babinocystis [Cornuta]
  • Babukella [Aulacothyropsidae]
  • Babylonella, Conrad 1865 [Cancellariidae]
  • Babylonia, Schlüter 1838 [Buccinidae]
  • Baccispongia [Hexactinellida]
  • Bacinella [Problematica]
  • Backhausina [Thecideidae]
  • Bactrellaria [Candidae]
  • Bactridium [Escharinidae]
  • Bactrites, Sandberger 1843 [Bactritidae]
  • Bactroceras, Holm 1898 [Baltoceratidae]
  • Bactrocrinites, Schnur 1849 [Cladida]
  • Bactrognathus [Conodontophorida]
  • Bactronella, Hinde 1884 [Minchinellidae]
  • Bactropora [Cryptostomata]
  • Bactroptyxis, Cossmann 1896 [Heterostrophia]
  • Bactrospira, Cossmann 1912 [Turritellidae]
  • Bactrotheca, Novak 1891 [Orthothecidae]
  • Bactrynium, Emmrich 1855 [Bactryniidae]
  • Baculina, d'Orbigny 1850 [Bochianitidae]
  • Baculites, Lamarck 1799 [Baculitidae]
  • Baculocystites [Diploporita]
  • Baculogypsina [Foraminifera]
  • Baculogypsinoides [Foraminifera]
  • Baculopora [Acanthocladiidae]
  • Badainjaranaspis, Lu et al. 1986 [Ptychopariida]
  • Badainjarania [Cyrtiidae]
  • Badiotella, Bittner 1890 [Limidae]
  • Badiotites, E. v. Mojsisovics 1879 [Badiotitidae]
  • Badouceras [Orthocerida]
  • Baelenia [Foraminifera]
  • Baeopleuroceras, Williams 1935 [Nephriticeratidae]
  • Baerocrinus, Volborth 1865 [Disparata]
  • Baffincythere [Podocopida]
  • Bagenoviella [Mollusca]
  • Baggatella [Foraminifera]
  • Baggina, Cushman 1926 [Bagginidae]
  • Bagginoides [Foraminifera]
  • Bagnorthis [Dalmanellidae]
  • Bagongshania, Lin 1983 [Crepicephalidae]
  • Bagrasia [Sentosiidae]
  • Baikalocyathus [Ajacicyathida]
  • Baikitolites, Sokolov 1955 [Syringophyllidae]
  • Baikonuraspis, Ergaliev 1983 [Ptychopariida]
  • Bailiaspis, Resser 1936 [Conocoryphidae]
  • Bailiella, Mathews 1885 [Conocoryphidae]
  • Bailielloides, Kobayashi and Hamada 1972 [Proetida]
  • Bailongjiangella [Trigonirhynchiidae]
  • Bailya, Smith 1944 [Buccinidae]
  • Bainbridgia, Ball 1933 [Pyrgiidae]
  • Bainella, Rennie 1930 [Calmoniidae]
  • Bairdianella [Bairdiidae]
  • Bairdiella, Gill 1861 [Perciformes]
  • Bairdiocypris [Podocopida]
  • Bairdiohealdites [Podocopida]
  • Bairdiolites, Croneis and Gale 1939 [Bairdiidae]
  • Bairdites [Metacopida]
  • Bairdoppilata [Podocopida]
  • Bairdops, Schram 1979 [Palaeostomatopoda]
  • Baisalina [Baisalinidae]
  • Baitalites, Chekhovich 1977 [Proporidae]
  • Baituganella [Foraminifera]
  • Baituganocaris [Archaeostraca]
  • Bajacythere [Podocopida]
  • Bajaichthys, Sorbini 1983 [Lampridiformes]
  • Bajanhongorella [Strophomenidae]
  • Bajanorthis [Orthida]
  • Bajgolia, Dzyubo 1962 [Bajgoliidae]
  • Bajiella, Jiang 1982 [Archaeocopida]
  • Bajkaloceras, Balashov 1960 [Bajkaloceratidae]
  • Bajolla [Stenolaemata]
  • Bakevellia, King 1848 [Grallatoridae]
  • Bakevelloides, Tokuyama 1959 [Grallatoridae]
  • Bakunella [Podocopida]
  • Balabania [Hippuritida]
  • Balacrinus, Ramsbottom 1961 [Diplobathrida]
  • Balakhonia [Linoproductidae]
  • Balangia, Chien 1961 [Corynexochida]
  • Balanocidaris [Cidaridae]
  • Balanoconcha [Gillediidae]
  • Balanocrinus, Agassiz 1847 [Isocrinidae]
  • Balanocystites [Mitrata]
  • Balanophyllia, Wood 1844 [Dendrophylliidae]
  • Balantionella, Schrammen 1902 [Euretidae]
  • Balantiostoma [Romancheinidae]
  • Balantoides [Palaeocopida]
  • Balanus, Da Costa 1778 [Balanidae]
  • Balashovia [Oncocerida]
  • Balatonia [Disjectoporidae]
  • Balatonites, E. v. Mojsisovics 1879 [Balatonitidae]
  • Balcis, Leach 1847 [Melanellidae]
  • Balcoracania, Pocock 1970 [Emuellidae]
  • Balderia, Robison 1988 [Menomoniidae]
  • Balearites, Sarkar 1954 [Crioceratitidae]
  • Balearocrinus, Bourrouilh and Termier 1974 [Crinoidea]
  • Baleiichthys [Pachycormiformes]
  • Balistomorphus, Gill 1888 [Tetraodontiformes]
  • Balizoma, Holloway 1980 [Encrinuridae]
  • Balkanites, Ganev 1966 [Dinaritinae]
  • Balkhania [Foraminifera]
  • Balkhasheconcha [Echinoconchidae]
  • Balkoceras [Balkoceratidae]
  • Ballardina [Palaeocopida]
  • Balowella [Podocopida]
  • Baltagnostus, Lochmann 1944 [Diplagnostidae]
  • Balticella [Palaeocopida]
  • Balticeras [Cephalopoda]
  • Balticoceras, Teichert 1940 [Cephalopoda]
  • Balticopora [Trepostomida]
  • Balticoporella [Trepostomida]
  • Balticoporellina [Cystoporata]
  • Baltoeurypterus [Eurypterida]
  • Baltoniodus [Conodontophorida]
  • Baltonotella [Palaeocopida]
  • Baltoparadoxides [Redlichiida]
  • Baluchicardia, Rutsch and Schenck 1943 [Carditidae]
  • Balvia, Lange 1929 [Prionoceratidae]
  • Bambusoceras [Ellesmerocerida]
  • Bamyaniceras, Termier and Termier 1970 [Medlicottiidae]
  • Bananogmius, Whitley 1940 [Plethodidae]
  • Banastella [Fenestrata]
  • Bancroftina [Dalmanellidae]
  • Bandalaspis, Ivshin 1962 [Asaphida]
  • Bandelium [Wortheniellidae]
  • Bandellina, Schroder 1995 [Cornirostridae]
  • Bandyella [Foraminifera]
  • Banffella [Foraminifera]
  • Banffia [Problematica]
  • Banis, L. W. Stephenson 1941 [Naticidae]
  • Bankia, Gray 1842 [Teredinidae]
  • Bankivia, Krauss 1848 [Trochidae]
  • Bannerella [Foraminifera]
  • Bapingaspis, Yuan 1988 [Proetida]
  • Baptopora [Cheilostomata]
  • Baptornis, O. C. Marsh 1877 [Aves]
  • Barbaestrophia [Leptostrophiidae]
  • Barbarella, Flügel 1972 [Plerophyllidae]
  • Barbarofusus [Neogastropoda]
  • Barbarorthis, Opik 1934 [Hesperorthidae]
  • Barbarothyris [Meganterididae]
  • Barbatia, Gray 1842 [Arcidae]
  • Barbatia (Ovalarca), Woodring 1925 [Arcidae]
  • Barbatulella [Obolidae]
  • Barbierella, Chavan 1938 [Lucinidae]
  • Barbieria [Diploporita]
  • Barbosaia [Pterioida]
  • Barbotella [Archaeogastropoda]
  • Barbourinella [Foraminifera]
  • Barcarenichthys, Gayet 1989 [Salmoniformes]
  • Barcoona [Bivalvia]
  • Barehamia [Pterioida]
  • Barella, Herdström 1930 [Hyolithellidae]
  • Barentsia [Entoprocta]
  • Barkeria [Neogastropoda]
  • Barkerina [Foraminifera]
  • Barklyella, Shergold 1969 [Trilobita]
  • Barkolia [Septatrypidae]
  • Barleeia, Clark 1853 [Barleeidae]
  • Barnardina [Foraminifera]
  • Barnea, Leach 1826 [Pholadidae]
  • Barnumia [Spatangoida]
  • Baronnites [Cephalopoda]
  • Barrandeites, E. v. Mojsisovics 1893 [Haloritidae]
  • Barrandeocarpus [Mitrata]
  • Barrandeoceras, Hyatt 1884 [Barrandoceratidae]
  • Barrandeocrinus, Angelin 1878 [Monobathrida]
  • Barrandeograptus [Graptoloidea]
  • Barrandeolites, Sokolov and Prantl 1965 [Tiverinidae]
  • Barrandeophyllum, Pocta 1902 [Laccophyllidae]
  • Barrandia, McCoy 1849 [Nileidae]
  • Barrandina [Clorindidae]
  • Barremites [Desmoceratidae]
  • Barrettia [Hippuritidae]
  • Barroisella, Cooper 1942 [Lingulidae]
  • Barroisia, Munier-Chalmas 1882 [Sphaerocoeliidae]
  • Barroisiceras, de Grossouvre 1894 [Collignoniceratidae]
  • Barroisucaulus [Murchisoniidae]
  • Barrosina [Palaeocopida]
  • Barrychilina [Podocopida]
  • Bartethusa, Quayle and Collins 1981 [Dorippidae]
  • Bartonia [Neogastropoda]
  • Bartramella, Verville et al. 1956 [Fusulinidae]
  • Bartrumia, Marwick 1934 [Tellinidae]
  • Bartschella, Iredale 1916 [Pyramidellidae]
  • Barunkhuraya [Productellidae]
  • Barychilina [Metacopida]
  • Baryconites [Hippuritida]
  • Barycrinus, Meeke and Worthen 1868 [Botryocrinidae]
  • Barycypraea [Neotaenioglossa]
  • Baryhelia, Milne-Edwards and Haime 1857 [Heterocoeniidae]
  • Barylasma, Weyer 1973 [Plerophyllidae]
  • Barymactra, Cossmann 1909 [Mactridae]
  • Barymepton [Palaeocopida]
  • Baryphyllia, Fromentel 1857 [Calamophylliidae]
  • Baryphyllum, Milne-Edwards and Haime 1850 [Plerophyllidae]
  • Barysmilia, Milne-Edwards and Haime 1848 [Rhipidogyridae]
  • Baryspira, Fischer 1883 [Olividae]
  • Barytellina, Marwick 1924 [Tellinidae]
  • Barytichisma, Moore and Jeffords 1945 [Hapsiphyllidae]
  • Barzellinia, Gregorio 1930 [Rhynchonellida]
  • Baschkirina [Bairdiocyprididae]
  • Baschkirites, Librovitch 1957 [Girtyoceratidae]
  • Bascomella, Morningstar 1922 [Ascodictyidae]
  • Bashkiria [Strophopleuridae]
  • Bashkiriella [Fenestrata]
  • Bashkortoceras, Ruzhencev and Bogoslovskaya 1971 [Homoceratidae]
  • Basidechenella, Richter 1912 [Proetidae]
  • Basilicorhynchus [Leiorhynchidae]
  • Basilicus, Salter 1849 [Asaphidae]
  • Basiliella, Kobayashi 1934 [Asaphidae]
  • Basiliola, Dall 1908 [Basiliolidae]
  • Basilirata [Neotaenioglossa]
  • Basilissa, Watson 1879 [Seguenziidae]
  • Basilitrona, Iredale 1930 [Cypraeidae]
  • Basleoceras [Adrianitidae]
  • Basleocrinus, Wanner 1916 [Cladida]
  • Basleophyllum, Schouppé and Stacul 1959 [Zaphrentoididae]
  • Basocephalus, Ivshin 1952 [Dorypygidae]
  • Basommatophora, order, Keferstein 1864 [Gastropoda]
  • Basseaster [Holasteridae]
  • Bassettina, Hodges 1995 [Cirripedia]
  • Bassina, Jukes-Brown 1914 [Veneridae]
  • Bassinaria, Marwick 1928 [Veneridae]
  • Bassipterus [Eurypterida]
  • Basslederella [Stenolaemata]
  • Bassleratia [Palaeocopida]
  • Basslerites [Podocopida]
  • Bassleroceras, Ulrich and Foerste 1936 [Bassleroceratidae]
  • Basslerocystis [Mitrata]
  • Bassozetus, Gill 1883 [Ophidiiformes]
  • Basterotia, Mayer in Hörnes 1859 [Sportellidae]
  • Bastindoceras [Nautilida]
  • Bastropia [Neogastropoda]
  • Batalleria [Diploporita]
  • Batavocythere [Podocopida]
  • Batchatiella, Poletaeva 1970 [Ptychopariida]
  • Bateroboceras [Tarphycerida]
  • Baterospirifer [Cyrtiidae]
  • Bathericrinus, Jaekel 1918 [Cladida]
  • Batherocystis, Bassler 1950 [Eocrinoidea]
  • Bathmoceras, Barrande 1867 [Bathmoceratidae]
  • Bathosella [Cheilostomata]
  • Bathotheca [Demospongea]
  • Bathraspira, Cossmann 1906 [Mathildidae]
  • Bathrocalpis [Nassellaria]
  • Bathronocrinus, Strimple 1962 [Laudonocrinidae]
  • Bathropyramis, Haeckel 1881 [Acropyramididae]
  • Bathrotomaria, Cox 1956 [Pleurotomariidae]
  • Bathyarca, Kobelt 1891 [Arcidae]
  • Bathybalva [Anthozoa]
  • Bathybembix, Crosse 1892 [Calliotropidae]
  • Bathycheilus, Holub 1908 [Bathycheilidae]
  • Bathyclupea, Alcock 1891 [Perciformes]
  • Bathycoenia, Tomes 1883 [Meandrinidae]
  • Bathycrinus, Thomson 1872 [Isocrinida]
  • Bathycyathus, Milne-Edwards and Haime [Turbinoliidae]
  • Bathycythere [Podocopida]
  • Bathydiscus, Rasetti 1966 [Weymouthiidae]
  • Bathygadus, Guenther 1878 [Gadiformes]
  • Bathygalea, Woodring and Olsson 1957 [Cassidae]
  • Bathylagus, Gnther 1878 [Bathylagidae]
  • Bathylasma, Newman and Ross 1971 [Pachylasmatidae]
  • Bathymyonia [Echinoconchidae]
  • Bathynotellus, Lermontova 1940 [Trilobita]
  • Bathynotus, Hall 1860 [Chengkouaspidae]
  • Bathyocos, Sunbe 1994 [Ptychopariida]
  • Bathyrhyncha [Trigonirhynchiidae]
  • Bathysiphon, G. O. Sars 1872 [Bathysiphonidae]
  • Bathysoma, Davis 1890 [Lampridiformes]
  • Bathysquilla [Stomatopoda]
  • Bathystomella [Cheilostomata]
  • Bathytoma, Harris and Burrows 1891 [Turridae]
  • Bathytormus, Stewart 1930 [Crassatellidae]
  • Bathyurellus, Billings 1865 [Bathyuridae]
  • Bathyuriscellus, Lermontova 1951 [Jakutidae]
  • Bathyuriscidella, Rasetti 1948 [Dolichometopidae]
  • Bathyuriscops, Keller and Lisogor 1954 [Leiostegiidae]
  • Bathyuriscopsis, Suvorova 1960 [Corynexochida]
  • Bathyuriscus, Meek [Dolichometopidae]
  • Bathyurus, Billings 1859 [Bathyuridae]
  • Batillaria, Benson 1842 [Sorbeoconcha]
  • Batillaria (Tateiwaia), Makiyama 1936 [Potamididae]
  • Batillona, Finlay 1927 [Turritellidae]
  • Batissa, Gray 1853 [Corbiculidae]
  • Batocara, Strusz 1980 [Encrinuridae]
  • Batocrinus, Casseday 1854 [Monobathrida]
  • Batolites [Hippuritida]
  • Batopora [Batoporidae]
  • Batostoma [Trepostomida]
  • Batostomella [Trepostomida]
  • Batostomellina [Trepostomida]
  • Batrachoides, Lapepède 1800 [Batrachoidiformes]
  • Batrachoidiformes, order [Actinopteri]
  • Batrachopora [Cheilostomata]
  • Batschykicyathus [Ajacicyathida]
  • Battaglia, Senowbari-Daryan and Schäfer 1986 [Solenolmiidae]
  • Baturria [Proschizophoriidae]
  • Batyraspis, Apollonov and Tschugaeva 1983 [Phacopida]
  • Bauchioceras (Wrightoceras), Reyment 1954 [Pseudotissotiidae]
  • Baueria [Arbaciidae]
  • Bauneia, Peterhans 1927 [Chaetetidae]
  • Bauxia [Neotaenioglossa]
  • Bavarilla, Barrande 1868 [Bavarillidae]
  • Bayania, Munier-Chalmas 1877 [Thiaridae]
  • Bayanoteuthis [Belemnitida]
  • Bayfieldia, Clark 1924 [Eurekiidae]
  • Bayhaium, Langenheim and McCutcheon 1959 [Roemeriidae]
  • Baykonuroceras, I. S. Barskov 1972 [Proteoceratidae]
  • Bayleia [Hippuritida]
  • Bayleites [Cephalopoda]
  • Bayleoidea [Hippuritida]
  • Bazardarella [Zeilleriidae]
  • Bdelloidina [Lituolidae]
  • Beachia [Centronellidae]
  • Beania [Cheilostomata]
  • Beaniceras [Liparoceratidae]
  • Beatamoosina [Podocopida]
  • Beatites [Aspenitidae]
  • Beaumontia, Milne-Edwards and Haime 1851 [Micheliniidae]
  • Beaumontoperca, Gaudant 2000 [Perciformes]
  • Beaussetia [Lychniscosa]
  • Becharocrinus, Termier and Termier 1956 [Crinoidea]
  • Bechleja, Housa 1957 [Palaemonidae]
  • Beckerhealdia [Metacopida]
  • Beckmannia [Hebetoechiidae]
  • Becksia, Schlüter 1868 [Callodictyonidae]
  • Beckwithia, Resser 1931 [Beckwithiidae]
  • Bedeva, Iredale 1924 [Muricidae]
  • Beecherella [Podocopida]
  • Beecheria [Beecheriidae]
  • Beecheroscapha [Beecherellidae]
  • Beedeina [Fusulinidae]
  • Beekmanoceras, Ulrich and Foerste 1936 [Mollusca]
  • Beella [Foraminifera]
  • Beerichthys, Casier 1966 [Perciformes]
  • Beichuanella [Stenoscismatidae]
  • Beichuania [Bivalvia]
  • Beichuanrhynchus [Rhynchonellata]
  • Beigongia, Qiu 1983 [Asaphida]
  • Beikedamaspis [Trilobita]
  • Beiliupora, Yü and Deng 1974 [Favositidae]
  • Beishanella [Redlichiida]
  • Beisselia [Neogastropoda]
  • Beisselina [Tessaradomidae]
  • Beisselinopsis [Cheilostomata]
  • Beitaia [Atrypinidae]
  • Bejrutella [Tchegemithyrididae]
  • Bekena [Metacopida]
  • Bekkeromena [Rafinesquinidae]
  • Beklemishevites [Hyolithelminthes]
  • Bekoma, Riedel and Sanfilippo 1971 [Bekomidae]
  • Bela, Gray 1847 [Turridae]
  • Belanskicrinus, Strimple and Levorson 1969 [Cladida]
  • Belatomina [Neogastropoda]
  • Belbekella, Moisseev 1939 [Tetrarhynchiidae]
  • Belemnacanthus, Eastman 1898 [Arthrodiriformes]
  • Belemnella [Belemnitida]
  • Belemnellocamax [Belemnitida]
  • Belemnitella [Belemnitida]
  • Belemnites [Belemnitida]
  • Belemnitida, order, Gray 1849 [Cephalopoda]
  • Belemnitina [Belemnitida]
  • Belemnobatis, Thiollière 1854 [Rhinobatidae]
  • Belemnocamax [Belemnitida]
  • Belemnocrinus, Munier-chalmas 1876 [Crinoidea]
  • Belemnocystites [Soluta]
  • Belemnopsis, Bayle 1878 [Belemnopseidae]
  • Belemnosella, Naef 1922 [Sepiida]
  • Belemnosis, Edwards 1849 [Sepiida]
  • Belemnospongia, Ulrich 1889 [Demospongea]
  • Belemnostroma, Stearn 1990 [Tienodictyidae]
  • Belemnoteuthis, Pearce 1842 [Belemnoteuthididae]
  • Beleutella [Monticuliferidae]
  • Beleutoceras, Ruzhencev and Bogoslovskaya 1971 [Nomismoceratidae]
  • Belgradeophyllum, Cotton 1973 [Anthozoa]
  • Bellaspidella, Rasetti 1945 [Dokimocephalidae]
  • Bellaspira, Conrad 1868 [Turridae]
  • Bellaspis, Rasetti 1945 [Dokimocephalidae]
  • Bellastraea, Iredale 1924 [Turbinidae]
  • Bellatara, Strand 1928 [Cerithiidae]
  • Bellaxinaea, Nicol 1984 [Glycymerididae]
  • Bellefontia, Walcott 1924 [Asaphidae]
  • Bellerophina [Neotaenioglossa]
  • Bellerophontida, order, Ulrich and Scofield 1897 [Gastropoda]
  • Belliceps, Repina 1966 [Redlichiida]
  • Bellifusus, L. W. Stephenson 1941 [Fasciolariidae]
  • Bellimurina, Cooper 1956 [Strophomenidae]
  • Bellinuroopsis [Xiphosurida]
  • Bellinurus, Konig 1820 [Bellinuridae]
  • Belliscala, L. W. Stephenson 1941 [Epitoniidae]
  • Bellocaris [Mysidacea]
  • Belloceras [Ellesmerocerida]
  • Belloliva, Peile 1922 [Olividae]
  • Bellornatia [Palaeocopida]
  • Bellucina, Dall 1901 [Lucinidae]
  • Beloceras, Hyatt 1884 [Beloceratidae]
  • Belochthus [Isorophida]
  • Belocrinus, E. C. P. A Munier-Chalmas 1881 [Spiraculata]
  • Belocurta, Avnimelech 1956 [Sepiida]
  • Belodella [Conodontophorida]
  • Belodina [Conodontophorida]
  • Beloitoceras, A. F. Foerste 1924 [Oncoceratidae]
  • Belone, Oken 1816 [Beloniformes]
  • Belonechitina [Rhizopodea]
  • Belonidium, Cossmann 1892 [Heterostrophia]
  • Beloniformes, order [Actinopteri]
  • Belonisia [Hexactinosa]
  • Belophos [Neogastropoda]
  • Beloplaxus [Neoloricata]
  • Beloptera, de Blainville 1827 [Sepiida]
  • Belopteridium, Naef 1921 [Sepiida]
  • Belopterina, Munier-Chalmas 1872 [Sepiida]
  • Belorussiella [Verneuilinidae]
  • Belorussipora [Cystoporata]
  • Belosepia, Bronn 1838 [Sepiidae]
  • Belosepiella, Alessandri 1905 [Sepiida]
  • Belospirula [Belemnitida]
  • Belosteus, Jaeckel 1927 [Arthrodira]
  • Belotelson [Belotelsonidea]
  • Belotelsonidea, order, Schram 1981 [Malacostraca]
  • Belothyris [Kingenidae]
  • Belovia, Poletaeva 1956 [Lichakephalidae]
  • Belowea [Spumellaria]
  • Beltanacyathus [Archaeocyathida]
  • Beltanelliformis [Actiniaria]
  • Beltella, Lake 1919 [Olenidae]
  • Bemaspis, Frederickson 1949 [Ptychopariida]
  • Bembicium, Philippi 1846 [Littorinidae]
  • Bembridgia [Neotaenioglossa]
  • Bembrops, Steindachner 1877 [Perciformes]
  • Benacoceras [Cephalopoda]
  • Bendeia [Neogastropoda]
  • Bendemacoma [Cardiida]
  • Bendenius [Palaeonisciformes]
  • Beneckastraea, Cuif 1976 [Pamiroseriidae]
  • Beneckeia, E. v. Mojsisovics 1882 [Beneckeiidae]
  • Benesovella, Chlupac 1969 [Proetidae]
  • Bennviaspis [Ostracoda]
  • Bensonastraea, Pedder 1966 [Phillipsastreidae]
  • Bensonia, Gray 1847 [Naticidae]
  • Bensonocythere, Hazel 1967 [Trachyleberididae]
  • Benthamaspis, Poulsen 1946 [Bathyuridae]
  • Bentharca, Verrill and Bush 1898 [Arcidae]
  • Benthesicymus, Bate 1881 [Benthesicymidae]
  • Benthocardiella, Powell 1930 [Condylocardiidae]
  • Benthocometes, Goode and Bean 1896 [Ophidiiformes]
  • Benthocrinus, Verrill 1885 [Cladida]
  • Benthomangelia, Thiele 1925 [Turridae]
  • Benthosema, Goode and Bean 1896 [Myctophidae]
  • Bentoceras [Tarphycerida]
  • Benxioceras [Protactinocerida]
  • Benxiphyllum [Anthozoa]
  • Beogradophyllum, Cotton 1973 [Anthozoa]
  • Beothuckia, Ludvigsen and Westrop 1989 [Ptychopariida]
  • Berabichia, Geyer 1990 [Ellipsocephalidae]
  • Berbericeras [Cephalopoda]
  • Berdanopis [Palaeocopida]
  • Berenicea, Lamouroux 1821 [Bereniceidae]
  • Beretra, L. W. Stephenson 1941 [Turridae]
  • Bergalaria [Septalariidae]
  • Bergamia, Whittard 1955 [Trinucleidae]
  • Bergerolimbus, Hupé 1960 [Trilobita]
  • Bergeroniaspis, Lermontova 1951 [Ellipsocephalidae]
  • Bergeroniellus, Lermontova 1940 [Ellipsocephalidae]
  • Bergeronites, Sun 1937 [Damesellidae]
  • Berggrenia [Foraminifera]
  • Bergoceras, Flower 1939 [Pseudorthoceratidae]
  • Bergstroemognathus [Conodontophorida]
  • Bergstroemograptus [Graptoloidea]
  • Beringius, Dall 1886 [Neptuneidae]
  • Berkhia, Gorskiy 1951 [Aulophyllidae]
  • Berkutaspis, Lisogor 1947 [Ptychopariida]
  • Berlieria, de Loriol 1903 [Patellidae]
  • Bermudezella [Foraminifera]
  • Bermudezina [Foraminifera]
  • Bermudezinella [Foraminifera]
  • Bernaya [Cypraeidae]
  • Bernia, Frederickson 1949 [Asaphida]
  • Berniceras [Oppeliidae]
  • Bernoullius, Baumgartner 1984 [Gomberellidae]
  • Beroides [Mollusca]
  • Berolinella [Palaeocopida]
  • Berounella [Podocopida]
  • Berriasella, Uhlig 1905 [Neocomitidae]
  • Berrosiceras [Cephalopoda]
  • Berryteuthis, Naef 1923 [Teuthida]
  • Berthelina [Foraminifera]
  • Berthelinella [Foraminifera]
  • Berthelinia [Sacoglossa]
  • Berthelinopsis [Foraminifera]
  • Bertillonella [Myodocopida]
  • Berybolcensis, Sorbini 1984 [Beryciformes]
  • Beryciformes, order, Regan 1909 [Actinopteri]
  • Berycomorus, Arambourg 1967 [Beryciformes]
  • Berycopsia, Radovcic 1975 [Polymixiiformes]
  • Berycopsis, Agassiz 1850 [Polymixiiformes]
  • Beryllia [Cornuta]
  • Beryx, Cuvier 1829 [Beryciformes]
  • Beschevella [Martiniidae]
  • Besla, Dall and Bartsch 1904 [Pyramidellidae]
  • Besselodus [Conodontophorida]
  • Bestjubella, Ivshin 1955 [Lichakephalidae]
  • Bethanyphyllum, Stumm 1949 [Bethanyphyllidae]
  • Betterbergia [Hebetoechiidae]
  • Bettonia, Whittard 1956 [Asaphida]
  • Betyokites [Cephalopoda]
  • Beudanticeras, Hitzell 1902 [Desmoceratidae]
  • Beudantiella [Cephalopoda]
  • Beugniesastraea, Coen-Aubert 1988 [Spongophyllidae]
  • Bevahites [Collignoniceratidae]
  • Beyrichia, M'Coy 1846 [Beyrichiidae]
  • Beyrichiella [Palaeocopida]
  • Beyrichiopsis [Palaeocopida]
  • Beyrichites, Waagen 1895 [Beyrichitidae]
  • Beyrichoceras, Foord 1903 [Maxigoniatitidae]
  • Beyrichoceratoides, Bisat 1924 [Muensteroceratidae]
  • Beyrichocrinus, Waagen and Jahn 1899 [Monobathrida]
  • Beyrichona, Mathew 1886 [Beyrichonidae]
  • Bezanconia, Bayle in Fischer 1884 [Cerithiidae]
  • Biapertorbis [Foraminifera]
  • Biarea, Torbakova 1959 [Brachiopoda]
  • Biarritzina [Foraminifera]
  • Biasterigerina [Foraminifera]
  • Biaurina [Ostracoda]
  • Biavertia, Opik 1967 [Ptychopariida]
  • Biavicularium [Cheilostomata]
  • Bibradya [Foraminifera]
  • Bibucia, Roberts 1963 [Pyrgiidae]
  • Bicatillus, Swainson 1840 [Calyptraeidae]
  • Bicavea [Cyclostomata]
  • Bicella, Cooper 1989 [Ptychopariida]
  • Bicepsirhynchia, Shi 1990 [Cyclothyrididae]
  • Biceratops, Pack and Gayle 1971 [Olenellidae]
  • Bichilina, Sarv 1959 [Bolliidae]
  • Bicia, Walcott 1901 [Obolellidae]
  • Bicidiocrinus, Strimple 1975 [Cladida]
  • Bicingulites, Ljaschenko 1969 [Turmalitidae]
  • Bickmorites, Foerste 1925 [Barrandoceratidae]
  • Bicolumnostratum, Stock 1998 [Actinostromatidae]
  • Biconcava [Mayncinidae]
  • Biconostrophia [Carinatinidae]
  • Biconulites, de Chardin 1931 [Problematica]
  • Bicorbula, Fischer 1887 [Corbulidae]
  • Bicornella, Coryell and Cuskley 1934 [Aechminellidae]
  • Bicornellina [Palaeocopida]
  • Bicornifera [Problematica]
  • Bicornifera [Cheilostomata]
  • Bicornipyge, Lisogor 1961 [Trilobita]
  • Bicornucopina [Hippuritida]
  • Bicornucythere [Podocopida]
  • Bicoronipora [Cyclostomata]
  • Bicoscinus [Kazakhstanicyathida]
  • Bicrenucula [Nuculida]
  • Bicrenula [Nuculida]
  • Bicrisia [Cyclostomata]
  • Bicrisina [Cyclostomata]
  • Bicuspina, Havlicek 1950 [Triplesiidae]
  • Bideirella [Palaeocopida]
  • Bidentatus [Theodossiidae]
  • Bidiastopora [Cyclostomata]
  • Bidjinella, Repina 1964 [Chengkouiidae]
  • Bienella, Lochman 1944 [Corynexochida]
  • Bienvillia, Clark 1924 [Olenidae]
  • Biernatella [Athyrididae]
  • Biernatia, Holmer 1989 [Biernatidae]
  • Biernatium [Mystrophoridae]
  • Bifarilaminella [Foraminifera]
  • Bifarina [Foraminifera]
  • Bifarinella [Foraminifera]
  • Bifariostroma, Khalfina 1968 [Actinostromatidae]
  • Bifaxaria [Cheilostomata]
  • Bifericeras [Eoderoceratidae]
  • Bifida [Anoplothecidae]
  • Bifidoscala [Neotaenioglossa]
  • Bifissurinella [Cheilostomata]
  • Biflabellaria [Cyclostomata]
  • Biflustra, d'Orbigny [Membraniporidae]
  • Bifolium [Thecidellinidae]
  • Bifossularia, Dobrolyubova 1966 [Uraliniidae]
  • Bifoveoceras, Balashov 1956 [Orthoceratidae]
  • Bifurcammina [Ammodiscidae]
  • Bifurcium, Fischer 1884 [Columbellidae]
  • Bigenerina, d'Orbigny 1826 [Textulariidae]
  • Bighornia [Streptelasmatidae]
  • Biglobigerinella [Foraminifera]
  • Bignotella [Spirotrichia]
  • Bigotella [Neotaenioglossa]
  • Bigotina, Cobbold 1935 [Ptychopariida]
  • Bigotinella, Suvorova 1960 [Ptychopariida]
  • Bigotinops, Hupe 1952 [Bigotinidae]
  • Bigotites [Perisphinctidae]
  • Bihenduloceras [Cephalopoda]
  • Bija, Vologdin 1932 [Problematica]
  • Bikocrinus, Ausich 1985 [Monobathrida]
  • Bilaminella, Babanova 1964 [Rhynchonellidae]
  • Bilecicrinus, Manni and Nicosia 1990 [Cyrtocrinida]
  • Bilinguites, Librovitch 1946 [Reticuloceratidae]
  • Bilingulogavelinella [Foraminifera]
  • Bilinia, Obrhelova 1971 [Perciformes]
  • Billcobbanoceras [Cephalopoda]
  • Billiemia [Neotaenioglossa]
  • Billingsaria, Okulitch 1936 [Billingsariidae]
  • Billingsites, Hyatt 1864 [Ascoceratidae]
  • Billingsocystis [Comarocystitida]
  • Bilobatia [Palaeocopida]
  • Bilobia, Cooper 1956 [Leptestiidae]
  • Bilobissa [Gryphaeidae]
  • Biloclymenia, Schindewolf 1923 [Biloclymeniidae]
  • Biloculinella [Hauerinidae]
  • Bimonilina [Foraminifera]
  • Bimuria, E. O. Ulrich and Cooper 1942 [Bimuriidae]
  • Bimuropora [Trepostomida]
  • Binatisphinctes [Cephalopoda]
  • Bingeria, Martinsson 1962 [Leperditicopida]
  • Binkhorstia, Noetling 1881 [Longusorbiidae]
  • Binneyites [Cephalopoda]
  • Binodaspis, Lermontova 1951 [Ptychopariidae]
  • Binodella [Palaeocopida]
  • Binodina [Palaeocopida]
  • Bioistodina [Problematica]
  • Biokovina [Foraminifera]
  • Biolgina, Maksimova 1955 [Bathyuridae]
  • Biorbis [Foraminifera]
  • Biovicella [Cyclostomata]
  • Bipallicyathus [Ajacicyathida]
  • Biparietata [Foraminifera]
  • Biphyllum, Fedorowski 1971 [Aulophyllidae]
  • Biplanata [Foraminifera]
  • Biplanispira [Foraminifera]
  • Biplex, Perry 1811 [Ranellidae]
  • Biplica, Popenoe 1957 [Ringiculidae]
  • Biplicatoria [Sellithyrididae]
  • Biplices [Cephalopoda]
  • Bipygmaeus [Serpulimorpha]
  • Biradiolites, d'Orbigny 1850 [Radiolitidae]
  • Birdsallella [Metacopida]
  • Bireophax [Hormosinidae]
  • Birgeria, E. Stensiö 1919 [Birgeriidae]
  • Birkenia [Birkeniiformes]
  • Birkeniiformes, order [Cephalaspidomorphi]
  • Birkenmajeria, Wids and De Wever 1993 [Obeliscoitidae]
  • Birmanites, Sheng 1934 [Asaphidae]
  • Birostrina, De Luc and J. Sowerby 1821 [Inoceramidae]
  • Bisacculus [Palaeocopida]
  • Bisatoceras, Miller and Owen 1937 [Bisatoceratidae]
  • Biscoia, Salmon 1962 [Ptychopariida]
  • Biselenaria [Cupuladriidae]
  • Biseptum [Gypidulidae]
  • Biseriammina [Foraminifera]
  • Biseriella [Biseriamminidae]
  • Bishanopliosaurus, Dong 1980 [Rhomaleosauridae]
  • Bisidmonea [Cyclostomata]
  • Bisinocoelia [Ambocoeliidae]
  • Bisonoceras [Endocerida]
  • Bispathodus [Polygnathidae]
  • Bisphaera [Bisphaeridae]
  • Bisphaerocephalina, Petrushevskaya 1965 [Cannobotryidae]
  • Bisphenella [Palaeocopida]
  • Bispinitia [Leperditicopida]
  • Bispiranella [Milioliporidae]
  • Bissulentactinia [Spumellaria]
  • Bistomiacystis [Paracrinoidea]
  • Bistramia, Hoek 1912 [Lingulida]
  • Bistrialites, Turner 1954 [Liroceratidae]
  • Bisulcata [Pentameridae]
  • Bisulcina [Cancellothyrididae]
  • Bisulcocypris [Podocopida]
  • Bisulcoentomozoe [Myodocopida]
  • Bitaunioceras, Shimizu and Obata 1936 [Spyroceratidae]
  • Bitaxia [Foraminifera]
  • Bitectipora [Cheilostomata]
  • Bithecocamara [Camaroidea]
  • Biticinella [Foraminifera]
  • Bitraria, Galle and Weyer 1973 [Laccophyllidae]
  • Bittiolum, Cossmann 1906 [Cerithiidae]
  • Bittiscala, Finlay and Marwick 1937 [Potamididae]
  • Bittium, Gray 1847 [Cerithiidae]
  • Bittneria [Pterioida]
  • Bituberitina [Foraminifera]
  • Bitubigera [Cyclostomata]
  • Bitubulogenerina [Foraminifera]
  • Bitumulina, Osmolska 1970 [Proetida]
  • Bivallupus, Pessagno and MacLeod 1987 [Pantanelliidae]
  • Bivestis [Cyclostomata]
  • Bivia, Berdan 1976 [Leperditicopida]
  • Biwaella [Schubertellidae]
  • Blabe, White 1936 [Perciformes]
  • Blackdownia [Neogastropoda]
  • Blackwelderia, Walcott 1906 [Damesellidae]
  • Blackwelderioides, Hupe 1953 [Damesellidae]
  • Blaculla, Munster 1839 [Decapoda]
  • Blagraveia [Cardiida]
  • Blainia, Walcott 1916 [Asaphiscidae]
  • Blainiopsis, Poulson 1947 [Ptychopariida]
  • Blairella, Miller and Gurley 1896 [Bivalvia]
  • Blairocrinus, Miller 1891 [Monobathrida]
  • Blakeoceras, Foerste 1926 [Nothoceratidae]
  • Blancia, Bourguignat 1875 [Cephalaspida]
  • Blandiaspis, Qian 1983 [Corynexochida]
  • Blandicephalus, Palmer 1955 [Asaphida]
  • Blanforidceras [Cephalopoda]
  • Blanodalmanites, Kobayashi and Hamada 1972 [Phacopida]
  • Blasicrura, Iredale 1934 [Cypraeidae]
  • Blastammina [Psammosphaeridae]
  • Blastinia, Zittel 1878 [Stellispongiidae]
  • Blastinoidea [Pharetronida]
  • Blastocerina, Flower 1940 [Brevicoceratidae]
  • Blastochaetetes, Dietrich 1919 [Chaetetidae]
  • Blastocystis [Parablastoidea]
  • Blastoidea, subclass, Say 1825 [Echinodermata]
  • Blastoidocrinus [Parablastoidea]
  • Blastolepas, Drushchits and Zevina 1969 [Cirripedia]
  • Blastosmilia, Etallon 1859 [Axosmiliidae]
  • Blastulospongia [Calcarea]
  • Blayacina, Cobbold 1932 [Trilobita]
  • Blefuscuiana [Foraminifera]
  • Blepharipoda [Decapoda]
  • Bleshidium [Camerellidae]
  • Bleta [Bivalvia]
  • Blochius, Volta 1800 [Sclerodermi]
  • Blothrocrinus, Kirk 1940 [Glossocrinidae]
  • Blothrocyathus, Wells 1932 [Aulastraeoporidae]
  • Blothrophyllum, Billings 1859 [Halliidae]
  • Blountia, Walcott 1916 [Kingstoniidae]
  • Blountiella, Resser 1938 [Asaphiscidae]
  • Blowiella [Foraminifera]
  • Blyskavomena [Strophomenidae]
  • Blysmatophyllum, Pedder 1970 [Endophyllidae]
  • Blystagnostus, Opik 1961 [Agnostida]
  • Bobasatraniiformes, order () [Actinopteri]
  • Bobastraniiformes, order [Actinopterygii]
  • Bobbichthys [Pachycormiformes]
  • Bobiesipora [Cyclostomata]
  • Bobinella [Tetralobulidae]
  • Bochianites, Lory 1898 [Bochianitidae]
  • Bodenbenderia, Harrington and Leanza 1957 [Leiostegiidae]
  • Bodenia [Palaeocopida]
  • Bodeniella [Palaeocopida]
  • Bodianus, Bloch 1790 [Perciformes]
  • Bodieceras [Tarphycerida]
  • Bodrakella [Pontisiidae]
  • Bodylevskites [Cephalopoda]
  • Boeckaspis, Henningsmoen 1955 [Olenidae]
  • Boeckelericambria [Maxillopoda]
  • Boehmiola [Heterostrophia]
  • Boehmoceras, Riedel 1931 [Baculitidae]
  • Boesites, Miller and Furnish 1940 [Daraelitidae]
  • Boettgeriola [Neogastropoda]
  • Boeuvia, Chavan 1948 [Lucinidae]
  • Bogdanoceras, Ruzhencev and Bogoslovskaya 1971 [Homoceratidae]
  • Boggsia [Neotaenioglossa]
  • Bogimbailites, Bondarenko 1966 [Taeniolitidae]
  • Bogoslovskya [Orthocerida]
  • Bogotacrinus, Schmidt 1934 [Monobathrida]
  • Bogushella [Foraminifera]
  • Bohaispira [Neotaenioglossa]
  • Bohaispiropsis [Neotaenioglossa]
  • Bohemaspis, Horbringer 1986 [Asaphida]
  • Bohemiaecystis [Cornuta]
  • Bohemicocrinus, Jahn 1893 [Monobathrida]
  • Bohemiella, Schuchert and Cooper 1931 [Bohemiellidae]
  • Bohemilla, Barrande 1872 [Bohemillidae]
  • Bohemiproetus, Pillet 1969 [Proetida]
  • Bohemirhynchia [Tetrarhynchiidae]
  • Bohemites [Orthocerida]
  • Bohemobolbina [Palaeocopida]
  • Bohemograptus [Graptoloidea]
  • Bohemoharpes, Vanek 1963 [Harpetidae]
  • Bohemopyge, Pribyl 1951 [Asaphidae]
  • Bohemoscolex [Palaeoscolecida]
  • Bohlenatia [Bairdiidae]
  • Boicinetes [Chonetidae]
  • Boikothalamia [Verticillitida]
  • Boiomytilus [Pterioida]
  • Bojarinovia, Aksarina 1978 [Naukatidae]
  • Bojarkaella [Ichthyolariidae]
  • Bojocoryphe, Snajdr 1976 [Tropidocoryphidae]
  • Bojocyclus, Prantl 1939 [Palaeocyclidae]
  • Bojodouvillina [Douvillinidae]
  • Bojoscutellum, Snajdr 1958 [Styginidae]
  • Bojothyris, Havlicek 1959 [Xenomartiniidae]
  • Bokkeveldia [Mitrata]
  • Bolaspidella, Resser 1937 [Menomoniidae]
  • Bolaspidellus, Lazerenko and Datsenko 1967 [Ptychopariida]
  • Bolaspidina, Lermontova 1960 [Ptychopariidae]
  • Bolaspis, Resser 1935 [Bolaspididae]
  • Bolbibollia, Ulrich and Bassler 1923 [Beyrichiidae]
  • Bolbilithis [Palaeocopida]
  • Bolbina [Palaeocopida]
  • Bolbineossia, Kesling et al. 1958 [Beyrichiidae]
  • Bolbiprimitia, Kay 1940 [Beyrichiidae]
  • Bolbocara, Jordan 1927 [Gadiformes]
  • Bolbocephalus, Whitfield 1890 [Bathyuridae]
  • Bolbochasmops, McNamara 1980 [Pterygometopidae]
  • Bolbocrinus, Wanner 1916 [Cladida]
  • Bolbolenellus [Olenellidae]
  • Bolboparia, Rasetti 1966 [Weymouthiidae]
  • Bolbopisthia [Palaeocopida]
  • Bolboporites [Anthozoa]
  • Bolboporites [Eocrinoidea]
  • Bolbozoe [Myodocopida]
  • Bolbozoella [Podocopida]
  • Bolcanguilla, Blot 1981 [Anguilliformes]
  • Bolcyrus, Blot 1978 [Congridae]
  • Boldella [Podocopida]
  • Boldia [Foraminifera]
  • Boletechinus [Phymosomatoida]
  • Boletzkida, order [Cephalopoda]
  • Boletzkyidae, family [Boletzkida]
  • Bolgarithyris [Capillithyrididae]
  • Bolicrinus, Witzke and Strimple 1981 [Monobathrida]
  • Bolidium, Zittel 1878 [Azoricidae]
  • Bolinichthys, Paxton 1972 [Myctophidae]
  • Bolinus (Pusch 1837) [Muricidae]
  • Bolis [Neogastropoda]
  • Bolitheca [Orthothecida]
  • Boliviacrinus, McIntosh 1988 [Monobathrida]
  • Bolivianaspis, Branisa and Vanek 1973 [Phacopida]
  • Bolivina, Gianotti 1953 [Bolivinidae]
  • Bolivinella [Foraminifera]
  • Bolivinellina [Foraminifera]
  • Bolivinita [Bolivinitidae]
  • Bolivinoides [Foraminifera]
  • Bolivinopsis, Yaklovlev 1891 [Textulariidae]
  • Boliviproetus, Eldredge and Ormiston 1979 [Proetida]
  • Bolivosteus, Goujet et al. 1986 [Rhenaniformes]
  • Bolkarina [Foraminifera]
  • Bollandia, F.R.C. Reed 1943 [Proetidae]
  • Bollandites, Bisat 1952 [Maxigoniatitidae]
  • Bollandoceras, Bisat 1952 [Maxigoniatitidae]
  • Bollandocrinus [Cladida]
  • Bollia, Jones and Holl 1886 [Bolliidae]
  • Bolliaphores [Palaeocopida]
  • Bolliella [Foraminifera]
  • Bolloceras, Foerste 1926 [Nothoceratidae]
  • Bolma, Risso 1826 [Turbinidae]
  • Bolojerea [Demospongea]
  • Bolospongia [Demospongea]
  • Boltenella, B. Wade 1917 [Fasciolariidae]
  • Boltovskoyella [Foraminifera]
  • Bomakellia, M. A. Fedonkin 1985 [Erniettamorpha]
  • Bombur, Munster 1839 [Penaeidae]
  • Bomina, Korovnik and Ushatinskaya 1994 [Botsfordiidae]
  • Bonata, Fedonkin 1980 [Medusae]
  • Bondarevites, Lazarenko 1989 [Trilobita]
  • Bondonella [Neltneriidae]
  • Bonellitia, Jousseaume 1887 [Cancellariidae]
  • Bonnaria, Lochman 1956 [Dorypygidae]
  • Bonnaspis, Resser 1936 [Corynexochidae]
  • Bonnemaia, Ulrich and Bassler 1923 [Zygobolbidae]
  • Bonneprimites [Palaeocopida]
  • Bonnetella [Archaeogastropoda]
  • Bonneterrina, Lochmann 1936 [Cedariidae]
  • Bonnia, Walcott 1916 [Dorypygidae]
  • Bonniella, Resser 1937 [Dorypygidae]
  • Bonniopsis, Poulsen 1946 [Dorypygidae]
  • Bontaea [Pholadomyida]
  • Boolelasma, Pedder 1967 [Laccophyllidae]
  • Boonderella [Giraldiellidae]
  • Boops, Cuvier 1814 [Perciformes]
  • Booralia [Cryptonellidae]
  • Boothaspis, Broad 1973 [Cyathaspidida]
  • Borchgrevingkium [Merostomata]
  • Borcobolbina [Palaeocopida]
  • Bordenia, Greene 1901 [Amplexidae]
  • Boreadocamara [Camerellidae]
  • Boreadorthis [Hesperorthidae]
  • Borealarges [Lichidae]
  • Borealaspis, Ludvigson 1976 [Cheiruridae]
  • Borealia, Maksimova 1977 [Proetida]
  • Borealicornus [Hyolithida]
  • Borealirhynchia, Su 1976 [Rhynchonellida]
  • Borealis, Boucot et al. 1971 [Virgianidae]
  • Boreas [Cheilostomata]
  • Boreasina [Cheilostomata]
  • Boreichthys, Selezneva 1982 [Perleidiformes]
  • Boreionectes, Zakharov 1965 [Pectinidae]
  • Borelis, Montfort 1808 [Alveolinidae]
  • Boreloides [Foraminifera]
  • Boreocomitas [Neogastropoda]
  • Boreomeekoceras [Meekoceratidae]
  • Boreoscutellum, Pribyl and Vanek 1972 [Corynexochida]
  • Boreotrophon, Fischer 1884 [Muricidae]
  • Borichthys [Palaeonisciformes]
  • Boriesia [Pholadomyida]
  • Borissia [Nuculida]
  • Borissiakoceras [Cephalopoda]
  • Borkinia [Clymeniida]
  • Borkopleura, Snajdr 1984 [Odontopleuridae]
  • Bornemannaspis, Rasetti 1972 [Redlichiida]
  • Bornhardticeras, Böhm and Riedel 1933 [Oppeliidae]
  • Bornhardtina [Stringocephalidae]
  • Bornholmaspis, Pribyl and Vanek 1983 [Phacopida]
  • Bornia [Kelliidae]
  • Borniola, Iredale 1924 [Erycinidae]
  • Borocyathus [Ajacicyathida]
  • Borodiella [Ostracoda]
  • Borodinia [Foraminifera]
  • Borogothus, Tjernvik 1956 [Asaphida]
  • Borovitchella [Podocopida]
  • Borsonella, Dall 1908 [Turridae]
  • Borsonia, Bellardi 1839 [Turridae]
  • Borthaspis, Stubblefield 1951 [Asaphida]
  • Borua [Taffiidae]
  • Boschchekulia, Lermontova 1951 [Asaphida]
  • Bositra [Posidoniidae]
  • Bosniella [Foraminifera]
  • Bosnites, Hauer 1896 [Noritidae]
  • Bosquetella [Thecidellinidae]
  • Bosquetia [Podocopida]
  • Bosquetina [Podocopida]
  • Bostrichopus [Arthropoda]
  • Bostrychoceras, Hyatt 1900 [Nostoceratidae]
  • Bostrychoceras [Cephalopoda]
  • Bostryclavus [Isorophida]
  • Bothoteca [Demospongea]
  • Bothrochlaenia [Demospongea]
  • Bothroclisia, Fomichev 1953 [Bothrophyllidae]
  • Bothrocorbula, Gabb 1873 [Corbulidae]
  • Bothrolemma, Schrammen 1924 [Platychoniidae]
  • Bothrophoria, Felix 1909 [Turbinoliidae]
  • Bothrophyllum, Trautschold 1879 [Bothrophyllidae]
  • Bothryopneutes [Cassiduloida]
  • Bothus, Rafinesque 1810 [Pleuronectiformes]
  • Boticium [Draboviidae]
  • Botocyathus [Ajacicyathida]
  • Botomella, Suvorova 1958 [Dinesidae]
  • Botrioides, Stetson 1927 [Trinucleidae]
  • Botroclonium, Pocta 1883 [Craticulariidae]
  • Botryceras [Endocerida]
  • Botryllopora [Cystoporata]
  • Botryocampe, Ehrenberg 1860 [Cannobotryidae]
  • Botryocella [Nassellaria]
  • Botryocrinus, Angelin 1878 [Botryocrinidae]
  • Botryocyrtis, Ehrenberg 1860 [Cannobotryidae]
  • Botryodictya [Reticulosa]
  • Botryopyle, Haeckel 1881 [Cannobotryidae]
  • Botryostrobus, Haeckel 1887 [Artostrobiidae]
  • Bottonaecyathus [Archaeocyathida]
  • Botula, Mörch 1853 [Mytilidae]
  • Botulobolbina [Palaeocopida]
  • Botulopsis, Reis 1926 [Mytilidae]
  • Boucaulticeras, Spath 1924 [Schlotheimiidae]
  • Boucekites [Ostracoda]
  • Bouchardia, Davidson 1850 [Bouchardiidae]
  • Bouchardiella [Bouchardiidae]
  • Boucia [Myodocopida]
  • Boucotella [Eatoniidae]
  • Boucotia, Gill 1969 [Spiriferida]
  • Boucotides [Clorindidae]
  • Boucotinskia [Cyrtinopsidae]
  • Boucotstrophia [Strophodontidae]
  • Bouleia, Kozlowski 1923 [Calmoniidae]
  • Bouleiceras [Hildoceratidae]
  • Bouleigmus [Pterioida]
  • Boultonia, Lee 1927 [Schubertellidae]
  • Bounyongia, Etheridge and Mitchell 1917 [Odontopleurida]
  • Bourgetia [Gastropoda]
  • Bourgueticrinida, order [Isocrinida]
  • Bourgueticrinus, Orbigny 1840 [Isocrinida]
  • Bournonia [Radiolitidae]
  • Bovicornellum [Problematica]
  • Bovicornu [Thecosomata]
  • Bowanophyllum, McLean and Webby 1976 [Tryplasmatidae]
  • Bowanorthis [Wangyuiidae]
  • Bowdenagaza [Archaeogastropoda]
  • Bowdenatheca [Cavoliniidae]
  • Bowdenia, Dall 1903 [Cuspidariidae]
  • Bowenelasma, Scrutton 1973 [Streptelasmatidae]
  • Bowlandia [Pholadomyida]
  • Bowmania, Walcott 1925 [Harpetidae]
  • Bozorginiella [Foraminifera]
  • Bozshakolia, Ushatinskaya et al. 1986 [Ceratretidae]
  • Brabeocrinus, H.L. Strimple and R.C. Moore 1971 [Cladida]
  • Bracebridgia [Adeonidae]
  • Brachaelurus, Ogilby 1906 [Orectolobiformes]
  • Brachidontes, Swainson 1840 [Mytilidae]
  • Brachiocrinus, Hall 1858 [Crinoidea]
  • Brachiograptus [Graptoloidea]
  • Brachiomonocrinus, Arendt 1974 [Cyrtocrinida]
  • Brachionichthys, Bleeker 1855 [Lophiiformes]
  • Brachiopoda, phylum, Dumeril 1806 [Brachiozoa]
  • Brachiospongia, Marsh 1867 [Brachiospongiidae]
  • Brachiospyris, Haeckel 1881 [Triospyrididae]
  • Brachopterella (Kjellesvig-Waering 1966) [Eurypterida]
  • Brachyaspidion, Miller 1936 [Kingstoniidae]
  • Brachybelus [Belemnitida]
  • Brachycerithium [Neotaenioglossa]
  • Brachycoenia, Beauvais 1982 [Haplaraeidae]
  • Brachycyathus [Caryophylliidae]
  • Brachycycloceras, Miller et al. 1933 [Brachycycloceratidae]
  • Brachycythere [Podocopida]
  • Brachycytheropteron [Ostracoda]
  • Brachydeirus, Koenen 1880 [Arthrodira]
  • Brachydeuterus, Gill 1862 [Perciformes]
  • Brachydomoceras, Teichert and Glenister 1952 [Polyelasmoceratidae]
  • Brachyhipposiderus, Jell 1985 [Harpetidae]
  • Brachylepas [Cirripedia]
  • Brachymeandra, Alloiteau 1957 [Haplaraeidae]
  • Brachymeris, Conrad 1873 [Ungulinidae]
  • Brachymimulus [Triplesiidae]
  • Brachymylus, Smith Woodward 1894 [Callorhinchidae]
  • Brachynotus, De Haan 1833 [Varunidae]
  • Brachyopterus [Eurypterida]
  • Brachyosteus, Jaeckel 1927 [Arthrodiriformes]
  • Brachypareion, Kazantseva-Selezneva 1980 [Palaeonisciformes]
  • Brachyphyllia, Reuss 1854 [Latomeandridae]
  • Brachyprion, N. S. Shaler 1865 [Leptostrophiidae]
  • Brachypterygius, Huene 1922 [Ophthalmosauridae]
  • Brachyrhizodus [Petalodontiformes]
  • Brachyschisma, I. G. Reimann 1945 [Brachyschismatidae]
  • Brachyseris, Alloiteau 1947 [Latomeandridae]
  • Brachysiphon [Saccamminidae]
  • Brachysoecia [Cyclostomata]
  • Brachysphingus [Neogastropoda]
  • Brachyspirifer [Hysterolitidae]
  • Brachystoma [Neotaenioglossa]
  • Brachystomia, Monterosato 1884 [Pyramidellidae]
  • Brachythyrina [Choristitidae]
  • Brachythyrinella [Trigonotretidae]
  • Brachytoma, Swainson 1840 [Turridae]
  • Brachytrema, Morris and Lycett 1851 [Brachytrematidae]
  • Brachyzyga [Meganterididae]
  • Brackebuschia, Harrington and Leanza 1957 [Leiostegiidae]
  • Bractea, Oliver 1975 [Favositidae]
  • Bractechlamys, Iredale 1939 [Pectinidae]
  • Bracteoleptaena [Rafinesquinidae]
  • Bractocyathus [Ajacicyathida]
  • Bracytrochus [Caryophylliidae]
  • Braderupia [Palaeocopida]
  • Bradfordia [Oppeliidae]
  • Bradfordirhynchia [Rhynchonellidae]
  • Bradfordoceras, Flower and Caster 1935 [Pseudorthoceratidae]
  • Bradleya, Hornibrook 1952 [Thaerocytheridae]
  • Bradocryphaeus, W. Haas and H. Mensink 1970 [Acastidae]
  • Bradoria, Mathew 1899 [Bradoriidae]
  • Bradyfallotaspis, Fritz 1972 [Archaeaspididae]
  • Bradyina [Bradyinidae]
  • Bradyphyllum, Grabau 1928 [Antiphyllidae]
  • Brahcylyrodesma [Modiomorphida]
  • Brahimorthis, Havlícek 1971 [Eoorthidae]
  • Brahmacrinus, Sollas 1900 [Monobathrida]
  • Brahmaites [Kossmaticeratidae]
  • Braiesopora [Cyclostomata]
  • Braintreella, Wheeler 1942 [Ptychopariidae]
  • Brama, Walbaum 1792 [Perciformes]
  • Bramertonia [Neotaenioglossa]
  • Bramkampella [Foraminifera]
  • Bramkampia [Thamboceratidae]
  • Brancasaurus, Wegner 1914 [Sauropterygia]
  • Branchiocarcinus, Vega et al. 1995 [Carcineretidae]
  • Branchiocaris, Briggs 1976 [Protocaridida]
  • Branchiolambrus, Rathbun 1908 [Parthenopidae]
  • Branchiopoda, class, Latreille 1817 [Crustacea]
  • Branchiostegus, Rafinesque 1815 [Perciformes]
  • Brancoceras, Steinmann 1881 [Brancoceratidae]
  • Brandysia [Cremnorthidae]
  • Brandysops, Horbringer 1986 [Asaphida]
  • Branikia [Theodossiidae]
  • Branislavia [Hippuritida]
  • Branmehlia [Conodontophorida]
  • Brannerion, Jordan 1920 [Anguilliformes]
  • Branneroceratoides [Entogonitidae]
  • Brasilia [Graphoceratidae]
  • Brasiliella [Squamulinidae]
  • Brasilioproductus [Productidae]
  • Brassicicephalus, Lochmann 1940 [Ptychopariida]
  • Braunosteus, Stensiö 1959 [Arthrodira]
  • Brebina [Austrotrillinidae]
  • Bredocaris [Orstenocarida]
  • Bredyia [Hammatoceratidae]
  • Bregmacerina, Danil'chenko 1957 [Gadiformes]
  • Bregmaceros, Thompson 1840 [Bregmacerotidae]
  • Breileenia [Productellidae]
  • Breizhops, Morzadec 1983 [Acastidae]
  • Breizosteus, Goujet 1980 [Acanthothoraciformes]
  • Brenckleina [Foraminifera]
  • Brephocharieis [Palaeocopida]
  • Brestopora [Stenolaemata]
  • Breviatractites [Aulacocerida]
  • Brevibelus [Belemnitida]
  • Brevibolbina [Palaeocopida]
  • Brevicamera [Camerellidae]
  • Brevicardium, L. W. Stephenson 1941 [Cardiidae]
  • Brevicoceras, Flower 1938 [Brevicoceratidae]
  • Brevidorsa [Palaeocopida]
  • Brevikites, Ruzhencev and Bogoslovskaya 1975 [Homoceratidae]
  • Brevilabiatus [Hyolithida]
  • Brevimaeandra, Babaev 1964 [Montlivaltiidae]
  • Brevinucula, Thiele 1934 [Nuculidae]
  • Breviorthonota [Mytilida]
  • Breviphrentis, Stumm 1949 [Streptelasmatidae]
  • Breviphyllum, Stumm 1949 [Streptelasmatidae]
  • Breviscutellum, Snajdr 1960 [Styginidae]
  • Breviseptophyllum, Ermakova 1960 [Disphyllidae]
  • Breviseptum [Gypidulidae]
  • Brevisiphonella [Pharetronida]
  • Brevispirifer [Adolfiidae]
  • Brevisulcina [Palaeocopida]
  • Brevitermierella, Hupé 1953 [Trilobita]
  • Brevitheca [Orthothecida]
  • Brewericeras [Hoplitidae]
  • Breynia [Loveniidae]
  • Brianellium, Cheng 1986 [Latentifistulidae]
  • Brianispongia [Demospongea]
  • Briantia, Barrois 1889 [Mucophyllidae]
  • Briarocrinus, Angelin 1878 [Monobathrida]
  • Briartina, Kegel 1932 [Leperditiidae]
  • Bridegeina [Archaeogastropoda]
  • Bridegeites [Euomphalina]
  • Bridgeia, Lochman 1944 [Trilobita]
  • Bridgeoceras, Ulrich et al. 1943 [Ellesmeroceratidae]
  • Bridgerocrinus, L. R. Laudon and J. L. Severson 1953 [Bridgerocrinidae]
  • Brightia [Oppeliidae]
  • Brightonia [Somaliasteridae]
  • Brightonicystis [Diploporita]
  • Brimethyris [Athyrididae]
  • Brimosaurus, J. Leidy 1854 [Sauropterygia]
  • Brindabellaspida, order, Young 1980 [Placodermi]
  • Brindabellaspis, Young 1980 [Brindabellaspida]
  • Brisaster, Gray 1855 [Schizasteridae]
  • Briscoia, Walcott 1924 [Dikelocephalidae]
  • Briseocrinus, Prokop and Petr 1991 [Cladida]
  • Brissomorpha [Asterostomatidae]
  • Brissopatagus, Cotteau 1863 [Brissidae]
  • Brissopneustes [Micrasteridae]
  • Brissopsis, L. Agassiz 1840 [Brissidae]
  • Brissus, Gray 1825 [Brissidae]
  • Bristolia, Harrington 1956 [Olenellidae]
  • Brizalina, Costa 1856 [Bolivinidae]
  • Brocchia [Neotaenioglossa]
  • Brocchinia [Neogastropoda]
  • Brocchitas, Finlay 1927 [Fasciolariidae]
  • Brochechinus [Orthopsidae]
  • Brochoadmones, Bernacsek and Dineley 1977 [Acanthodii]
  • Brochocarina [Orthotetidae]
  • Brochopleurus [Temnopleuridae]
  • Brochosogenys [Eunicemorpha]
  • Brockocystis [Rhombifera]
  • Brodekoceras [Discosorida]
  • Brodieia [Phymatoceratidae]
  • Broeckina [Meandropsinidae]
  • Broeckinella [Foraminifera]
  • Broeggeria, Walcott 1902 [Elkaniidae]
  • Broeggeroceras, Sweet 1958 [Westonoceratidae]
  • Broeggerolithus, Lamont 1935 [Trinucleidae]
  • Bromidella [Palaeocopida]
  • Bromidocrinus, Kolata 1982 [Diplobathrida]
  • Bromidocystis [Eocrinoidea]
  • Bronaughocrinus, Strimple 1951 [Cladida]
  • Brongniartella, Reed 1918 [Homalonotidae]
  • Bronicella [Medusae]
  • Bronnimannia [Foraminifera]
  • Bronnothyris [Megathyrididae]
  • Bronsteiniana [Podocopida]
  • Bronteopsis, Nicholson and Etheridge 1879 [Styginidae]
  • Brookesena [Neotaenioglossa]
  • Brooksina, Kirk 1922 [Pentameridae]
  • Brookula, Iredale 1912 [Turbinidae]
  • Brookvalia, Wade 1933 [Redfieldiidae]
  • Brosme, Rafinesque 1815 [Gadiformes]
  • Brosmius, Cuvier 1829 [Gadiformes]
  • Brotula [Ophididae]
  • Brouwerites, C. Diener 1923 [Steinmannitidae]
  • Brouzetia [Heterostrophia]
  • Broweria [Megalopiformes]
  • Browneella [Trigonirhynchiidae]
  • Browneichthys, Woodward 1889 [Palaeonisciformes]
  • Bruclarkia, Trask 1926 [Neptuneidae]
  • Bruennichometra, Rasmussen 1961 [Comatulida]
  • Bruetia [Cardiida]
  • Bruniastarte [Cardiida]
  • Brunnirhyncha [Aseptorhynchiidae]
  • Brunonia, Mller 1898 [Archaeogastropoda]
  • Brunsia [Pseudoammodiscidae]
  • Brunsiella [Foraminifera]
  • Brunswickia, Howell 1937 [Ptychopariidae]
  • Bruntonichthys, Dennis and Miles 1980 [Arthrodiriformes]
  • Bruntonites [Athyrididae]
  • Brushenodus [Pteromidae]
  • Brutaspis, Ivshin 1962 [Ptychopariida]
  • Brutonia, Thomas and Holloway 1988 [Lichida]
  • Brutopisocrinus, Prokop and Petr 1989 [Crinoidea]
  • Bryantodina [Conodontophorida]
  • Bryantodus [Prioniodidae]
  • Brychaetus, Agassiz 1845 [Osteoglossidae]
  • Brychiocrinus, Moore and Plummer 1940 [Cladida]
  • Brydonella [Cheilostomata]
  • Brylyella [Corynexochida]
  • Bryochelys [Cheloniidae]
  • Bryocryptella [Cheilostomata]
  • Bryograptus [Dendroidea]
  • Bryozoa, phylum, Ehrenberg 1831 [Polyzoa]
  • Bubnoffiella [Cheilostomata]
  • Bubnoffiopsis [Palaeocopida]
  • Bubupeltina, Snajdr 1991 [Corynexochida]
  • Bucanoides [Thecosomata]
  • Bucanophyllum, Ulrich 1886 [Cystiphyllidae]
  • Bucanotheca, Qian and Jiang 1980 [Orthothecida]
  • Bucardiomya, Rollier 1912 [Pholadomyidae]
  • Bucardium, Gray 1853 [Cardiidae]
  • Buccella [Discorbidae]
  • Buccicrenata [Cyclamminidae]
  • Buccinanops [Nassariidae]
  • Buccinaria, Kittl 1887 [Turridae]
  • Buccinofusus, Conrad 1868 [Fasciolariidae]
  • Buccinopsis, Conrad 1857 [Buccinidae]
  • Buccinorbis, Conrad 1865 [Buccinidae]
  • Buccinulum, Swainson 1837 [Buccinidae]
  • Buccitriton [Buccinidae]
  • Bucconia, Dall 1890 [Cephalaspida]
  • Buceqia [Lissatrypidae]
  • Bucerella [Palaeocopida]
  • Bucerobolbina [Palaeocopida]
  • Buchanathyris, J.A. Talent 1956 [Athyrididae]
  • Buchanoceras, Teichert and Glenister 1952 [Pseudorthoceratidae]
  • Buchanosteus, Stensiö 1945 [Arthrodira]
  • Bucherina [Foraminifera]
  • Buchia, Rouillier 1845 [Buchiidae]
  • Buchiceras, Hyatt 1875 [Acanthoceratidae]
  • Buchicrinus [Isocrinida]
  • Buchiproetus [Tropidocoryphidae]
  • Buchnerina, Jones 1984 [Ellipsolagenidae]
  • Buchotrigonia [Trigoniida]
  • Buchozia [Neogastropoda]
  • Buckmanina [Archaeogastropoda]
  • Buckmanithyris [Nucleatidae]
  • Bucksella, Howel 1957 [Ptychopariida]
  • Budashevaella [Foraminifera]
  • Buddhaites, C. Diener 1895 [Gymnitidae]
  • Budnianella [Ostracoda]
  • Buehleroceras, Ulrich et al. 1943 [Ellesmeroceratidae]
  • Buelowiteuthis [Aulacocerida]
  • Buenellus, Blaker 1988 [Nevadiidae]
  • Bueningia [Foraminifera]
  • Bufanchiste [Podocopida]
  • Buffalopterus [Eurypterida]
  • Buffonella [Cheilostomata]
  • Buffonellodes [Buffonellodidae]
  • Bufina [Metacopida]
  • Bufoceraurus, Hessin 1989 [Phacopida]
  • Bufonariella, Thiele 1929 [Bursidae]
  • Buglossidium, Chabanaud 1930 [Soleidae]
  • Bukowskiites, C. Diener 1907 [Gymnitidae]
  • Bulahdelia [Productellidae]
  • Bulaiaspis, Repina 1956 [Chengkouaspidae]
  • Bulamicrusta [Crustoidea]
  • Bulbaspis, Chugaeva 1956 [Raphiophoridae]
  • Bulbihastula [Neogastropoda]
  • Bulbobaculites [Foraminifera]
  • Bulbobuccicrenata [Haplophragmoiidae]
  • Bulbocystis [Diploporita]
  • Bulbophragmium [Foraminifera]
  • Bulbosclerites [Podocopida]
  • Bulbosulculus [Palaeocopida]
  • Bulbus, Brown 1839 [Naticidae]
  • Bulimactaeon, Cossmann 1891 [Cephalaspida]
  • Bulimina, d'Orbigny 1826 [Buliminidae]
  • Buliminella, Cushman 1911 [Buliminidae]
  • Buliminellita [Foraminifera]
  • Buliminoides [Foraminifera]
  • Bullaeferum [Palaeocopida]
  • Bullaluta [Ostracoda]
  • Bullalveolina [Alveolinidae]
  • Bullata, Jousseaume 1875 [Volutidae]
  • Bullatella [Palaeocopida]
  • Bullatimorphites [Tulitidae]
  • Bullerichthys, Dennis and Miles 1980 [Arthrodira]
  • Bullia, Gray 1834 [Nassariidae]
  • Bullia (Molopophorus), Gabb 1869 [Buccinidae]
  • Bullina, Férussac 1822 [Cephalaspida]
  • Bulliopsis [Nassariidae]
  • Bullopora, Quenstedt 1856 [Polymorphinidae]
  • Bullopsis, Conrad 1858 [Bullidae]
  • Bullothyris [Terebratulida]
  • Bullulodictyon, Yavorsky 1967 [Clathrodictyidae]
  • Bulnibarbi [Ptychopariida]
  • Bulogites, G. v. Arthaber 1912 [Balatonitidae]
  • Bulovia [Neogastropoda]
  • Bulvankeriphyllum, Goryanov 1966 [Kodonophyllidae]
  • Bumastides, Veber 1948 [Asaphida]
  • Bumastus, Murchison 1839 [Illaenidae]
  • Bunaia [Xiphosurida]
  • Bunburyiceras [Cephalopoda]
  • Bundenbachiellus [Arthropoda]
  • Bundenbachochaeta [Polychaeta]
  • Bungartius, Dunkle 1947 [Arthrodiriformes]
  • Bungoella [Cardiida]
  • Bunodella [Xiphosurida]
  • Bunodes [Xiphosurida]
  • Buntoxia [Echinoconchidae]
  • Bunyerichnus, Glaessner 1969 [Metazoa]
  • Burbonella [Palaeonisciformes]
  • Burckhardites, Humphrey 1949 [Desmoceratidae]
  • Burckhardtia [Pterioida]
  • Burdigalocrinus, Jaekel 1918 [Comatulida]
  • Buregia [Palaeocopida]
  • Burenoceras, Ulrich and Foerste 1931 [Ellesmeroceratidae]
  • Burgessia [Arthropoda]
  • Burgessochaeta [Annelida]
  • Burgundia, Dehorne 1916 [Burgundiidae]
  • Buria, Morozova and Zharnikova 1984 [Cyclostomata]
  • Burmeisterella, Reed 1918 [Phacopida]
  • Burmeisteria, Salter 1865 [Homalonotidae]
  • Burmesia [Burmesiidae]
  • Burnetiella, Lochmann 1958 [Dokimocephalidae]
  • Burnhamia, Cappetta 1976 [Myliobatidae]
  • Burrinijucosteus [Arthrodira]
  • Burrirhynchia, Owen 1962 [Tetrarhynchiidae]
  • Burronoceras [Cephalopoda]
  • Bursa, Roding 1798 [Bursidae]
  • Bursachitina [Rhizopodea]
  • Bursacrinus, Meek and Worthen 1861 [Cladida]
  • Bursata [Polyplacophora]
  • Burseolina [Foraminifera]
  • Burtinella [Vermetidae]
  • Burtinia, Van Beneden 1873 [Perciformes]
  • Burtonops, Struve 1990 [Phacopida]
  • Buryella, Foreman 1973 [Eucyrtidiidae]
  • Buscotypus [Gastropoda]
  • Buskia [Ctenostomata]
  • Buskopora [Cystoporata]
  • Busnardoites [Cephalopoda]
  • Bussonastraea (Bauvais 1965) [Amphiastreidae]
  • Busuanga, Yeh 1990 [Pentactinocarpidae]
  • Busycon, Röding 1798 [Melongenidae]
  • Busycon (Echinofulgur), Olsson and Harbison 1953 [Melongenidae]
  • Busycotypus [Melongenidae]
  • Butakovicyathus [Monocyathida]
  • Butkovia [Anoplothecidae]
  • Butovia [Cribricyathea]
  • Butovicella, J. Kríž 1965 [Modiomorphidae]
  • Buttsia, Wilson 1951 [Catillicephalidae]
  • Buttsoceras, Ulrich and Foerste 1933 [Troedssonellidae]
  • Buvignieria [Rissoidae]
  • Buxtonia [Productidae]
  • Buxtoniella [Echinoconchidae]
  • Buxtonioides, Mendes 1959 [Productidae]
  • Buzasina [Haplophragmoididae]
  • Bvalbardites [Ptychopariida]
  • Bykovaeina [Psammosphaeridae]
  • Bykoviella, Korcheagin 1964 [Adercotrynidae]
  • Bylgia, Munster 1839 [Decapoda]
  • Bynguanoia [Naukatidae]
  • Bynumia, Walcott 1924 [Kingstoniidae]
  • Bynumiella, Resser 1942 [Kingstoniidae]
  • Bynumina, Resser 1942 [Kingstoniidae]
  • Byramia [Neotaenioglossa]
  • Byronia [Hyolithelminthes]
  • Byronoceras, Foerste and Savage 1927 [Acleistoceratidae]
  • Byrsolopsina [Palaeocopida]
  • Byssocardium [Cardiidae]
  • Byssomera [Cardiida]
  • Byssonychia, Ulrich 1893 [Ambonychiidae]
  • Byssopteria, J. Hall 1883 [Ambonychiidae]
  • Bystromena [Glyptomenidae]
  • Bythiamena [Cardiida]
  • Bythoceratina [Podocopida]
  • Bythocypris, Brady 1880 [Bythocyprididae]
  • Bythocyproidea [Metacopida]
  • Bythocythere [Podocopida]
  • Bythocytheromorpha [Podocopida]
  • Bythopora [Trepostomida]
  • Bythotrypa [Cystoporata]
  • Cabania [Neogastropoda]
  • Caberea [Candidae]
  • Caberoides [Cheilostomata]
  • Cabestanna [Neotaenioglossa]
  • Caborcella, Lochmann 1948 [Ptychopariidae]
  • Cabralista [Cardiida]
  • Cabrievoceras (Bogoslovsky 2002) [Werneroceratidae]
  • Cacemia [Heterorthidae]
  • Cacheoceras [Endocerida]
  • Cactocrinus, Wachsmuth and Springer 1897 [Monobathrida]
  • Cactograptus [Graptolithina]
  • Cadella, Dall et al. 1938 [Tellinidae]
  • Cadisocrinus [Diplobathrida]
  • Cadniacyathus [Ajacicyathida]
  • Cadoceras [Cadoceratidae]
  • Cadocrinus, Wanner 1924 [Cladida]
  • Cadomella [Rhynchonellata]
  • Cadomia, Goarant de Tromelin 1877 [Malletiidae]
  • Cadomites [Stephanoceratidae]
  • Cadomoceras [Haploceratidae]
  • Cadudium [Gypidulidae]
  • Cadulus, Philippi 1844 [Gadilidae]
  • Caecum, Fleming 1813 [Caecidae]
  • Caecum (Brochina) (Gray 1837) [Caecidae]
  • Caelocrinus [Cladida]
  • Caenisites [Arietitidae]
  • Caenocidaris [Psychocidaridae]
  • Caenocyclus, Schindewolf 1922 [Pericyclidae]
  • Caenodontus [Conodontophorida]
  • Caenolyroceras, Ruzhencev and Bogoslovskaya 1971 [Neoglyphioceratidae]
  • Caenotreta [Biernatidae]
  • Caeroplecia [Triplesiidae]
  • Caesaria [Hexactinosa]
  • Caesariella [Nuculida]
  • Caesia, H. Adams and A. Adams 1853 [Nassariidae]
  • Caesio, Lacpde 1802 [Perciformes]
  • Caestocorbula, Vincent 1910 [Corbulidae]
  • Caeus, Costa 1853 [Gonorhynchiformes]
  • Caganaspis, Kolobova 1968 [Asaphida]
  • Cagaster [Spatangoida]
  • Cahabagnathus [Conodontophorida]
  • Cainatops, Matthew 1899 [Ptychopariida]
  • Cainoceras, van Hoepen 1942 [Brancoceratidae]
  • Cainocrinus, Forbes 1852 [Isocrinida]
  • Calacanthopora [Trepostomida]
  • Calaiceras [Phylloceratidae]
  • Calameastolia [Scleractinia]
  • Calamocrinus, Agassiz 1890 [Cyrtocrinida]
  • Calamograptus [Graptoloidea]
  • Calamophyllia, Blainville 1830 [Calamophylliidae]
  • Calamophylliopsis, Alloiteau 1952 [Dermosmiliidae]
  • Calamoseris, Alloiteau 1952 [Calamophylliidae]
  • Calamotrypa [Trepostomida]
  • Calamus, Swainson 1839 [Perciformes]
  • Calantica, Gray 1825 [Calanticidae]
  • Calapoecia, Billings 1865 [Syringophyllidae]
  • Calappa, Weber 1795 [Calappidae]
  • Calappilia, A. Milne Edwards 1873 [Calappidae]
  • Calathiscus [Lychniscosa]
  • Calathospongia [Lyssacinosa]
  • Calcarata, Jousseaume 1887 [Cancellariidae]
  • Calcarea, class, Bowerbank 1864 [Porifera]
  • Calcaribeyrichia [Podocopida]
  • Calcarina [Calcarinidae]
  • Calcaronea, order, Bidder 1898 [Calcarea]
  • Calceochiton [Mattheviidae]
  • Calceocrinus, Hall 1852 [Crinoidea]
  • Calceola, Lamarck 1799 [Goniophyllidae]
  • Calchasiceras [Oncocerida]
  • Calcihexactina, Sdzuy 1969 [Hyalostellidae]
  • Calcistella [Hadromerida]
  • Calcitheca [Hyolithomorpha]
  • Calcitornella [Cornuspiridae]
  • Calcitrapessa [Neogastropoda]
  • Calcivertella [Cornuspiridae]
  • Caldenocrinus [Sagenocrinida]
  • Caleidocrinus, Jahn 1893 [Crinoidea]
  • Calhounoceras, Troedsson 1926 [Actinocerida]
  • Caliapora, Schlüter 1889 [Alveolitidae]
  • Calicantharus, Clark 1938 [Buccinidae]
  • Caliculospongia [Porifera]
  • Califodesma [Cardiida]
  • Californiceras [Cephalopoda]
  • Californosaurus, Kuhn 1934 [Californosauridae]
  • Caligella [Caligellidae]
  • Calilampus [Cassiduloida]
  • Calinastrea [Anthozoa]
  • Calix [Diploporita]
  • Callaionautilus, Kieslinger 1924 [Clydonautilidae]
  • Callanaitis, Iredale 1917 [Veneridae]
  • Callaspis, Zhang 1983 [Asaphida]
  • Callavia, Matthew 1897 [Holmiidae]
  • Callianassa, Leach 1814 [Callianassidae]
  • Callicalyptella, Boucot and Johnson 1972 [Spiriferida]
  • Calliconites [Xiphoteuthididae]
  • Calliglypha [Clarkellidae]
  • Callihoplites [Hoplitidae]
  • Callimitra, Haeckel 1881 [Sethoperidae]
  • Callinectes, W. Stimpson 1860 [Portunidae]
  • Calliobasis [Archaeogastropoda]
  • Calliocrinus, Orbigny 1850 [Monobathrida]
  • Calliomphalus, Cossmann 1888 [Calliotropidae]
  • Calliostoma, Swainson 1840 [Trochidae]
  • Calliotectum, Dall 1890 [Volutidae]
  • Calliotropis, Seguenza 1903 [Eucyclidae]
  • Calliovarica, Vokes 1939 [Chilodontidae]
  • Calliphylloceras, Spath 1927 [Phylloceratidae]
  • Callipleura [Machaerariidae]
  • Calliprotonia [Echinoconchidae]
  • Calliptychoceras [Cephalopoda]
  • Callispirifer [Adolfiidae]
  • Callispirina, Cooper and Muir-Wood 1951 [Paraspiriferinidae]
  • Callista, Poli 1791 [Veneridae]
  • Callistalox [Cardiida]
  • Callistochiton, Carpenter 1879 [Neoloricata]
  • Callistocypraea [Neotaenioglossa]
  • Callistocythere [Podocopida]
  • Callithaca [Veneridae]
  • Callitrigonia [Trigoniida]
  • Callizoe [Archaeostraca]
  • Callizoniceras [Desmoceratidae]
  • Calloarca, Gray 1857 [Arcidae]
  • Callocardia, A. Adams 1864 [Veneridae]
  • Callochiton, Gray 1847 [Ischnochitonidae]
  • Callocladia [Cryptostomata]
  • Calloconularia [Conulariidae]
  • Callocystites [Rhombifera]
  • Callodictyon, Zittel 1877 [Callodictyonidae]
  • Callognathus, Newberry 1890 [Arthrodiriformes]
  • Callograptus [Dendroidea]
  • Callolongchaeus, Dall 1903 [Pyramidellidae]
  • Callopegma, Zittel 1878 [Siphoniidae]
  • Callopora, Gray 1848 [Calloporidae]
  • Calloporella [Trepostomida]
  • Calloporina [Microporellidae]
  • Callopterus, Thollière 1854 [Furidae]
  • Callopteus [Semionotiformes]
  • Callorhinus, J. E. Gray 1859 [Otariidae]
  • Callorhynchus, Cuvier 1829 [Chimaeridae]
  • Callosphaera [Spumellaria]
  • Callospiriferina [Pennospiriferinidae]
  • Callotrypa [Trepostomida]
  • Callucina (Dall 1901) [Lucinidae]
  • Callucinopsis, Chavan 1959 [Lucinidae]
  • Callusaria [Neotaenioglossa]
  • Callyodon, Gronovius 1763 [Perciformes]
  • Calmiussiphyllum, Vasilyuk 1959 [Bothrophyllidae]
  • Calmonia, Clarke 1913 [Calmoniidae]
  • Calocaria [Myodocopida]
  • Calocephalites, Kurtz 1975 [Dokimocephalidae]
  • Caloceras [Psiloceratidae]
  • Calocidaris, H. L. Clark 1907 [Cidaridae]
  • Calocyclas, Ehrenberg 1847 [Eucyrtidiidae]
  • Calocycletta, Haeckel 1887 [Pterocorythidae]
  • Calocycloma, Haeckel 1887 [Eucyrtidiidae]
  • Calocyrtoceras, Foerste 1936 [Paraphragmitidae]
  • Calodisculus, Rehder 1935 [Architectonicidae]
  • Calodiscus, Howell 1935 [Calodiscidae]
  • Calophos, Woodring 1964 [Nassariidae]
  • Calophylloides, Ivanovskiy 1976 [Polycoeliidae]
  • Calophyllum, Dana 1846 [Polycoeliidae]
  • Calopora [Trepostomida]
  • Calorebama, Squires 1989 [Pseudolividae]
  • Calorhadia, Stewart 1930 [Nuculanidae]
  • Calostylis, Lindström 1868 [Calostylidae]
  • Calotomus, Gilbert 1890 [Perciformes]
  • Calotrophon, Hertlein and Strong 1951 [Muricidae]
  • Caloxanthus, A. Milne-Edwards 1864 [Feldmanniidae]
  • Calpensia [Microporidae]
  • Calpichtina [Rhizopodea]
  • Calpidopora [Cheilostomata]
  • Calpiocrinus [Sagenocrinida]
  • Calpionella [Calpionellida]
  • Calpionellida, order [Ciliophora]
  • Calpionellites [Calpionellida]
  • Calpionellopsis [Calpionellida]
  • Calpmenella [Phacopida]
  • Calpurna [Neotaenioglossa]
  • Calthalotia, Iredale 1929 [Trochidae]
  • Calthropella [Astrophorida]
  • Calva, Popenoe 1837 [Veneridae]
  • Calvadosiella [Neotaenioglossa]
  • Calvaentolium [Pterioida]
  • Calverturris [Neogastropoda]
  • Calvetina [Cheilostomata]
  • Calveziconus [Foraminifera]
  • Calvezina [Robuloididae]
  • Calvina [Cheilostomata]
  • Calvinella, Walcott 1914 [Saukiidae]
  • Calvipelta, Westrop 1986 [Kingstoniidae]
  • Calvirhynchia [Erymnariidae]
  • Calvustrigis [Strophopleuridae]
  • Calybole, Richter 1927 [Proetida]
  • Calycanthocrinus, Follmann 1887 [Crinoidea]
  • Calycoblastus, J. Wanner 1924 [Spiraculata]
  • Calycoceras, Hyatt 1900 [Acanthoceratidae]
  • Calycocoelia, Bassler 1927 [Anthaspidellidae]
  • Calycocrinus [Calycocrinidae]
  • Calycospongia, Wu and Xiao 1989 [Craticulariidae]
  • Calycotubus [Tuboidea]
  • Calymene, Brongniart 1822 [Calymenidae]
  • Calymenella, Bergeron 1890 [Calymenidae]
  • Calymenesum, Kobayashi 1951 [Calymenidae]
  • Calymenidius, Rasetti 1944 [Lonchocephalidae]
  • Calymmatina, Zittel 1878 [Siphoniidae]
  • Calyptaulax, Cooper 1930 [Pterygometopidae]
  • Calyptocoryphe [Nassellaria]
  • Calyptocoscinus [Capsulocyathida]
  • Calyptolepta [Grorudiidae]
  • Calyptraea, Lamarck 1799 [Calyptraeidae]
  • Calyptraea (Sigapatella), Lesson 1830 [Calyptraeidae]
  • Calyptraphorus, Conrad 1857 [Strombidae]
  • Calyptrina, Sokolov 1967 [Sabelliditida]
  • Calyptropsis [Neotaenioglossa]
  • Calyxdendrum [Dendroidea]
  • Camagueyia [Foraminifera]
  • Camaraspis, Ulrich and Resser 1925 [Pterocephaliidae]
  • Camaraspoides, Frederickson 1949 [Asaphida]
  • Camarium [Meristidae]
  • Camarnia [Neogastropoda]
  • Camarocarcinus, F. D. Holland and A. Cvancara 1958 [Camarocarcinidae]
  • Camarocrinus, Hall 1879 [Monobathrida]
  • Camaroidea, order [Graptolithina]
  • Camarophorella [Meristidae]
  • Camarophorinella [Psilocamaridae]
  • Camarospira [Meristidae]
  • Camarothyridina [Ladogiidae]
  • Camarotoechia, Hall and Clarke 1893 [Camarotoechiidae]
  • Camarotoechioides [Rhynchonellida]
  • Cambarus [Decapoda]
  • Cambraechmina [Ostracoda]
  • Cambraster [Edrioasteroidea]
  • Cambria, Netskaya and Ivanova 1956 [Hipponicharionidae]
  • Cambroblastus [Edrioasterida]
  • Cambroblastus [Parablastoidea]
  • Cambrocassis [Problematica]
  • Cambroclavida, class, Conway Morris and Chen 1991 [Problematica]
  • Cambrocrinus, Orlowski 1968 [Ascocystitida]
  • Cambrocyathells [Archaeocyathida]
  • Cambrogeorgina [Problematica]
  • Cambromedusa [Medusae]
  • Cambrooistodus [Conodontophorida]
  • Cambropachycope [Arthropoda]
  • Cambrophyllum [Anthozoa]
  • Cambropodus [Myriapoda]
  • Cambrorhytium, Walcott 1911 [Metazoa]
  • Cambroscutum [Mollusca]
  • Cambrotrophia [Eostrophiidae]
  • Cambrotrypa [Anthozoa]
  • Cambrunicornia, Geyer 1990 [Trilobita]
  • Camdenidea [Podocopida]
  • Cameleolopha [Pterioida]
  • Camerella, Billings 1859 [Camerellidae]
  • Camerisma [Stenoscismatidae]
  • Cameroceras, T. A. Conrad 1842 [Endoceratidae]
  • Camerogalerus [Discoididae]
  • Camerophorina [Camerophorinidae]
  • Cameroptychium, Leonhard 1897 [Coeloptychidae]
  • Camerospongia, d'Orbigny 1849 [Camerospongiidae]
  • Camerotheca, Mathew 1885 [Camerothecidae]
  • Camerothyris [Aulacothyropsidae]
  • Cammingella [Proetida]
  • Campages, Hedley 1905 [Dallinidae]
  • Campanelle [Heterostrophia]
  • Campanellula [Foraminifera]
  • Campanile, Fischer 1884 [Campanilidae]
  • Campanulithus, Nazarov and Rudenko 1981 [Palacantholithidae]
  • Campbelloceras, Ulrich and Foerste 1936 [Tarphyceratidae]
  • Campbellodus, Miles and Young 1977 [Ptyctodontiformes]
  • Campendoceras, Teichert and Glenister 1954 [Proterocameroceratidae]
  • Campichia [Heterostrophia]
  • Campodus, de Koninck 1844 [Eugeneodontiformes]
  • Camponaxis [Tofanellidae]
  • Camponeila [Heterostrophia]
  • Campophyllum, Milne-Edwards and Haime 1850 [Campophyllidae]
  • Camposcala [Neotaenioglossa]
  • Campropallus [Olenellida]
  • Camptoalatus, Nazarov and Rudenko 1981 [Corythoecidae]
  • Camptoceratops [Thecosomata]
  • Camptochiton, M. D. Debrock et al. 1984 [Lepidopleuridae]
  • Camptochlamys, Arkell 1930 [Pectinidae]
  • Camptocrinus, Wachsmuth and Springer 1897 [Platycrinitidae]
  • Camptocythere [Podocopida]
  • Camptolithus, Lindström 1899 [Plasmoporellidae]
  • Camptonectes, Meek 1864 [Pectinidae]
  • Camptosalpinx [Serpulimorpha]
  • Camptostroma [Coronatida]
  • Camptostroma [Camptostromatoida]
  • Camptostromatoida, order [Camptostromoidea]
  • Camptostromoidea, class [Echinodermata]
  • Campylacrum [Neogastropoda]
  • Campylites [Polychaeta]
  • Campylites, Rollier 1922 [Oppeliidae]
  • Campylocephalus [Hibbertopteridae]
  • Campyloceras, M'Coy 1844 [Pseudorthoceratidae]
  • Campylocythere [Podocopida]
  • Campylorthis, Ulrich and Copper 1942 [Plaesiomyidae]
  • Campylostoma, Bell 1858 [Cenomanocarcinidae]
  • Campylostoma [Diploporita]
  • Camsellia, Ormiston 1976 [Proetida]
  • Camurophyllum, Kravtsov 1966 [Lykophyllidae]
  • Camuropiscis, Dennis and Miles 1979 [Arthrodira]
  • Canadapteraspis [Pteraspidomorphes]
  • Canadaspidida, order, Novozhilov in Orlov 1960 [Crustacea]
  • Canadaspis, Novozhilov in Orlov 1960 [Canadaspididae]
  • Canadia [Annelida]
  • Canadiphyllum, Sutherland 1954 [Hapsiphyllidae]
  • Canadoceras, Spath 1922 [Pachydiscidae]
  • Canadocystis [Comarocystitida]
  • Canadospira [Rastelligeridae]
  • Canadotis [Pterioida]
  • Canalilatus [Zhanatellidae]
  • Canalipora [Cyclostomata]
  • Canaliscala, Cossmann 1888 [Potamididae]
  • Canarium, Schumacher 1817 [Strombidae]
  • Canavarella [Graphoceratidae]
  • Canavaria, Gemmellaro 1886 [Hildoceratidae]
  • Canavarites [Arietitidae]
  • Canavirilia [Leiorhynchidae]
  • Cancellaria, Lamarck 1799 [Cancellariidae]
  • Cancellaria (Bivetiella), Wenz 1943 [Cancellariidae]
  • Cancellaria (Pyruclia), Olsson 1932 [Cancellariidae]
  • Cancellariella [Neogastropoda]
  • Cancellina [Neoschwagerinidae]
  • Cancelloceras, Ruzhencev and Bogoslovskaya 1969 [Gastrioceratidae]
  • Cancellothyris [Cancellothyrididae]
  • Cancelrana [Neogastropoda]
  • Cancilla, Swainson 1840 [Mitridae]
  • Cancrinella [Linoproductidae]
  • Cancrinos, Munster 1839 [Cancrinidae]
  • Cancris, Monfort 1808 [Bagginidae]
  • Cancrisiella [Foraminifera]
  • Cancrixantho, Van Straelen 1934 [Carcineretidae]
  • Canda [Candidae]
  • Candeina [Foraminifera]
  • Candinia [Sacoglossa]
  • Candispirifer [Reticulariidae]
  • Candorbulina [Foraminifera]
  • Canepina, Conti and Fischer 1981 [Gastropoda]
  • Canesium [Nassellaria]
  • Caninella, Gorskiy 1938 [Bothrophyllidae]
  • Caninia, Michelin 1840 [Cyathopsidae]
  • Caninophyllum, Lewis 1929 [Bothrophyllidae]
  • Caninostrotion, Easton 1943 [Aulophyllidae]
  • Canistrocrinus, Wachsmuth and Springer 1885 [Monobathrida]
  • Canistrumella, Rigby 1986 [Eiffeliidae]
  • Cannapora, Hall 1852 [Syringoporidae]
  • Cannartidium [Spumellaria]
  • Cannartiscus [Spumellaria]
  • Cannartus [Spumellaria]
  • Canningella, Legg 1976 [Pliomeridae]
  • Canningius [Coelacanthiformes]
  • Cannobotrys, Haeckel 1881 [Cannobotryidae]
  • Cannostomites [Coronatida]
  • Canobius, Traquair 1881 [Palaeoniscidae]
  • Cantabricanites, Weyer 1965 [Prolecanitidae]
  • Cantabriella [Strophopleuridae]
  • Cantharidella, Pilsbry 1889 [Trochidae]
  • Cantharidus, Monfort 1810 [Trochidae]
  • Cantharidus (Beraua), Beets 1941 [Trochidae]
  • Cantharocrinus, Breimer 1962 [Monobathrida]
  • Cantharulus [Neogastropoda]
  • Cantharus, Röding 1798 [Buccinidae]
  • Canthylotreta, Rowell 1966 [Acrotretidae]
  • Cantrainea [Turbinidae]
  • Cantrillia, Smith 1930 [Tryplasmatidae]
  • Canupora [Cheilostomata]
  • Canutrypa [Cystoporata]
  • Canutus, Pessagno and Whalen 1982 [Bagotidae]
  • Capedopecten [Pterioida]
  • Capellineosuchus, Romer 1966 [Metriorhynchidae]
  • Capelliniella, Strand 1928 [Pentameridae]
  • Capillapora [Trepostomida]
  • Capillarina [Capillithyrididae]
  • Capillicyathus [Cribricyathea]
  • Capillimya [Laternulidae]
  • Capillirostra [Norellidae]
  • Capillispirifer [Choristitidae]
  • Capillithyris [Capillithyrididae]
  • Capistrocardia [Myoida]
  • Caplinoplia [Anopliidae]
  • Capnodoce, De Wever 1979 [Pantanelliidae]
  • Capnophyllum, Sutherland 1965 [Eridophyllidae]
  • Capnuchosphaera, De Wever 1979 [Capnuchosphaeridae]
  • Caprabolbina [Palaeocopida]
  • Capricornognathus [Conodontophorida]
  • Caprina, d'Orbigny 1822 [Caprinidae]
  • Caprinella [Hippuritida]
  • Caprinula [Caprinidae]
  • Caprinuloidea [Caprinidae]
  • Capriocornites [Nautilida]
  • Caproberyx, Regan 1911 [Beryciformes]
  • Capros, Lacpde 1802 [Zeiformes]
  • Caprotina [Caprotinidae]
  • Caprovesposus, Danil'chenko 1960 [Zeiformes]
  • Capsacythere [Podocopida]
  • Capsella [Cardiida]
  • Capsicocrinus, Delogu and Nicosia 1986 [Cyrtocrinida]
  • Capsospongia, Rigby 1986 [Anthaspidellidae]
  • Capsulocyathida, order, Zhuravleva 1964 [Regulares]
  • Capsulocyathus [Capsulocyathida]
  • Capulacmaea [Neotaenioglossa]
  • Capulus, Monfort 1810 [Capulidae]
  • Carabocrinus, Billings 1857 [Cladida]
  • Carangodes, Heckel 1856 [Perciformes]
  • Carantophyllum [Scleractinia]
  • Caranx, Lacpde 1802 [Perciformes]
  • Carapezzia [Peregrinellidae]
  • Carapus, Rafinesque 1810 [Ophidiiformes]
  • Carbactinoceras, Schindewolf 1935 [Carbactinoceratidae]
  • Carbocyrtina [Davidsoninidae]
  • Carbonarca, Meek 1866 [Parallelodontidae]
  • Carbonella [Foraminifera]
  • Carboninia [Heterostrophia]
  • Carbonocoryphe, R. Richter and E. Richter 1950 [Proetidae]
  • Carbonoproetus, J. Gandl 1987 [Proetidae]
  • Carboprimita [Palaeocopida]
  • Carbosesostris [Phyllodocemorpha]
  • Carcharhinus, de Blainville 1816 [Carcharhinidae]
  • Carchariolamna, Hora 1939 [Lamniformes]
  • Carcharocles, Jordan 1923 [Otodontidae]
  • Carcharodon, Smith 1838 [Lamnidae]
  • Carcicocaenia, Alloiteau 1954 [Scleractinia]
  • Carcineretes, Withers 1922 [Carcineretidae]
  • Carcinocarcinus [Decapoda]
  • Carcinocrinus, Laudon 1941 [Cladida]
  • Carcinoplacoides [Catoptridae]
  • Carcinoplax, H. Milne-Edwards 1852 [Goneplacidae]
  • Carcinosoma [Carcinosomatidae]
  • Carcinus, Leach 1814 [Carcinidae]
  • Cardabia [Holasteroida]
  • Cardiaphyllum [Anthozoa]
  • Cardiarachnidium [Ctenostomata]
  • Cardiaster [Holasteridae]
  • Cardiastraea, Beauvais 1978 [Reimaniphylliidae]
  • Cardiella, Pavlov 1967 [Marathonitidae]
  • Cardilia, Deshayes 1835 [Cardiliidae]
  • Cardilona [Cardiida]
  • Cardinalia [Archaeogastropoda]
  • Cardinia, Edwards 1837 [Cardiniidae]
  • Cardiniferella [Palaeocopida]
  • Cardinioides [Trigonodidae]
  • Cardiniopsis [Cardiida]
  • Cardiocardita, Anton 1839 [Carditidae]
  • Cardioceras [Cardioceratidae]
  • Cardiocystites, Barrande 1887 [Eocrinoidea]
  • Cardiodictyon [Onychophora]
  • Cardioecia [Cyclostomata]
  • Cardiograptus [Graptoloidea]
  • Cardiolampas [Disasteridae]
  • Cardiolaria, Munier-Chalmas 1876 [Cardiolariidae]
  • Cardiolita, Strand 1933 [Arcida]
  • Cardiolopsis [Cardiolidae]
  • Cardiomantea [Cardiida]
  • Cardiomya, A. Adams 1864 [Cuspidariidae]
  • Cardiopelta [Collyritidae]
  • Cardiophyllum [Cribricyathea]
  • Cardiotaxis [Holasteridae]
  • Cardiothyris [Athyrididae]
  • Cardirhynchus, Schluter 1862 [Decapoda]
  • Cardisoma, Latreille 1825 [Gecarcinidae]
  • Cardita, Bruguière 1792 [Carditidae]
  • Cardita (Strophocardia), Olsson 1961 [Carditidae]
  • Carditamera, Conrad 1838 [Carditidae]
  • Carditella, Smith 1881 [Carditidae]
  • Carditellopsis [Cardiida]
  • Cardites, Link 1807 [Carditidae]
  • Carditomantea [Cardiida]
  • Carditopsis [Cardiida]
  • Cardium, Linnaeus 1758 [Cardiidae]
  • Cardium (Pachycardium) (Conrad 1869) [Cardiidae]
  • Cardobairdia [Saipanettidae]
  • Careliopsis, Mörch 1875 [Pyramidellidae]
  • Caretta, Rafinesque 1814 [Testudines]
  • Caribbaster [Spatangoida]
  • Caribbella [Podocopida]
  • Caribeanella [Foraminifera]
  • Caribiella [Neogastropoda]
  • Caricella, Conrad 1835 [Volutidae]
  • Carinacca [Neotaenioglossa]
  • Carinacyathus [Ajacicyathida]
  • Carinagypa, Johnson and Ludvigsen 1973 [Gypidulidae]
  • Carinaria, Lamarck 1801 [Carinariidae]
  • Carinastarte [Cardiida]
  • Carinatina [Carinatinidae]
  • Carinatinella [Atrypidae]
  • Carinator [Archaeogastropoda]
  • Carinatothyris [Terebratulida]
  • Carinatrypa [Carinatinidae]
  • Carinella [Conodontophorida]
  • Carinifer [Cyclostomata]
  • Cariniferella [Dalmanellidae]
  • Carinitheca [Orthothecida]
  • Carinobolbina [Palaeocopida]
  • Carinoceras, Ljaschenko 1957 [Gephuroceratidae]
  • Carinoclymenia, Bogoslovsky 1965 [Carinoclymeniidae]
  • Carinoconus [Foraminifera]
  • Carinodictya [Rhinidictyidae]
  • Carinokloedenia [Palaeocopida]
  • Carinokoninckina [Koninckinidae]
  • Carinomphalus [Neotaenioglossa]
  • Carinonautilus, Spengler 1910 [Nautilidae]
  • Carinonychia [Pterioida]
  • Carinophylloporina [Fenestrata]
  • Carinotropsis [Neogastropoda]
  • Carinthiaphyllum, Heritsch 1936 [Geyerophyllidae]
  • Caritodens [Pterineidae]
  • Carixia [Cornuspiridae]
  • Carlclausus [Tanaidacea]
  • Carlinastraea, Merriam 1976 [Spongophyllidae]
  • Carlinia [Productidae]
  • Carlloceras, Flower and Caster 1935 [Centroceratidae]
  • Carlopsocrinus, Wright 1933 [Cladida]
  • Carmon, Barrande 1872 [Trilobita]
  • Carnarvonia [Ostracoda]
  • Carnegiea, Girty 1913 [Chaetetidae]
  • Carneithyris [Gibbithyrididae]
  • Carneyella, Forste 1916 [Hemicystitidae]
  • Carniaphyllum, Heritsch 1936 [Geyerophyllidae]
  • Carnicoleus [Lepidocoleomorpha]
  • Carnidia [Bivalvia]
  • Carniodus [Conodontophorida]
  • Carnites, E. v. Mojsisovics 1873 [Carnitidae]
  • Carnivora, order, Bowditch 1821 [Mammalia]
  • Carolia, Cantraine 1838 [Anomiidae]
  • Carolia (Parinomya), Olsson 1928 [Anomiidae]
  • Carolicrinus, Waagen and Jahn 1899 [Monobathrida]
  • Carolinites, Kobayashi 1940 [Telephinidae]
  • Carolirhynchia [Aseptorhynchiidae]
  • Carota [Neogastropoda]
  • Carotites [Discosorida]
  • Carpathichthys, Jerzmanska 1979 [Osmeriformes]
  • Carpenteria [Homotrematidae]
  • Carpenteroblastus, Rowley 1901 [Spiraculata]
  • Carpicyathus [Ajacicyathida]
  • Carpilius, Desmarest 1823 [Carpiliidae]
  • Carpilodes [Decapoda]
  • Carpinaria [Spinocyrtiidae]
  • Carpocanarium [Nassellaria]
  • Carpocanistrum, Haeckel 1887 [Carpocaniidae]
  • Carpocanium, Ehrenberg 1847 [Carpocaniidae]
  • Carpocanopsis, Riedel and Sanfilippo 1971 [Carpocaniidae]
  • Carpocrinus, Muller 1840 [Monobathrida]
  • Carpocystites [Diploporita]
  • Carpopenaeus, Glaessner 1946 [Carpopenaeidae]
  • Carpospongia, Rauff 1894 [Astylospongiidae]
  • Carrickia, Tripp 1965 [Telephinidae]
  • Carringtonia [Productellidae]
  • Carruthersella, Garwood 1913 [Aulophyllidae]
  • Carsosaurus, Kornhuber 1893 [Aigialosauridae]
  • Carsothrissops, D'Erasmo 1946 [Elopiformes]
  • Carstenia [Cephalopoda]
  • Carterella, Zittel 1878 [Demospongea]
  • Carteridina [Athyrididae]
  • Carterina [Foraminifera]
  • Carterochaena [Myoida]
  • Carthaginites [Cephalopoda]
  • Carubacgutes [Sachitida]
  • Carubaknightina [Palaeocopida]
  • Caruichthys, Broom 1913 [Palaeonisciformes]
  • Carybdeida, order [Cubozoa]
  • Carydiopora [Cheilostomata]
  • Carydium, Beushausen 1895 [Carydiidae]
  • Caryoblastus, A. Breimer et al. 1968 [Fissiculata]
  • Caryocaris, Salter 1863 [Caryocarididae]
  • Caryocorbula, Gardner 1926 [Corbulidae]
  • Caryocrinites, Say 1825 [Caryocrinitidae]
  • Caryocystites, Buch 1844 [Caryocystitidae]
  • Caryogyps, Johnson et al. 1976 [Gypidulidae]
  • Caryomanon [Demospongea]
  • Caryophyllia, Lamarck 1801 [Caryophylliidae]
  • Caryorhynchus [Leiorhynchidae]
  • Caryosphaera [Spumellaria]
  • Caryospongia, Rauff 1894 [Astylospongiidae]
  • Caseispongia [Hexactinosa]
  • Caseoceras, Ulrich et al. 1943 [Ellesmeroceratidae]
  • Caseyella [Neogastropoda]
  • Casierius, Estes 1969 [Anguilliformes]
  • Casieroides, Taverne 1975 [Salmoniformes]
  • Casimiria [Neotaenioglossa]
  • Casmaria, H. Adams and A. Adams 1853 [Cassidae]
  • Caspiaza [Spumellaria]
  • Caspiella [Foraminifera]
  • Caspimactra [Cardiida]
  • Casquella [Obolidae]
  • Cassianastraea, Volz 1897 [Lemniscateridae]
  • Cassianastraea, Volz 1897 [Zardinophyllidae]
  • Cassianastraea [Archaeogastropoda]
  • Cassianaxis [Heterostrophia]
  • Cassianella, Beyrich 1862 [Cassianellidae]
  • Cassianilda [Heterostrophia]
  • Cassianocirrus, Bandel 1993 [Porcelliidae]
  • Cassianopora [Hydrozoa]
  • Cassianospira [Neoretziidae]
  • Cassianostroma, Flügel 1960 [Halichondrida]
  • Cassianothalamia, Reitner 1987 [Cassianothalamiidae]
  • Cassidaria, Lamarck 1816 [Cassidae]
  • Cassidelina [Foraminifera]
  • Cassidella [Foraminifera]
  • Cassideus, Pessagno 1969 [Cuniculiformiidae]
  • Cassidiceps, Gagnier and Wilson 1996 [Climatiiformes]
  • Cassidirostrum [Hebetoechiidae]
  • Cassidulina, d'Orbigny 1826 [Cassidulinidae]
  • Cassidulinella [Foraminifera]
  • Cassidulinita [Foraminifera]
  • Cassidulinoides, Cushman 1927 [Islandiellidae]
  • Cassigerinella, Pokorny 1955 [Globigerinidae]
  • Cassigerinelloita, Stolk 1956 [Globigerinidae]
  • Cassinoceras, Ulrich and Foerste 1936 [Piloceratidae]
  • Cassiope, Coquand 1865 [Cassiopidae]
  • Cassipelia [Archaeogastropoda]
  • Cassis, Scopoli 1777 [Cassidae]
  • Cassis (Sassia), Bellardi 1872 [Cassidae]
  • Cassubia, Lendzion 1977 [Anomalocarididae]
  • Castanopora [Cheilostomata]
  • Castellaroina [Leptostrophiidae]
  • Castericystis [Soluta]
  • Casteroceras, Flower 1936 [Rutoceratidae]
  • Casterocythere [Podocopida]
  • Casterolimulus [Xiphosurida]
  • Casteropora [Ctenostomata]
  • Castrum [Pseudodictyomitridae]
  • Catacephalus [Stringocephalidae]
  • Cataceramus, Cox 1969 [Inoceramidae]
  • Catacoeloceras [Dactylioceratidae]
  • Catacoraites [Metacopida]
  • Catactocrinus, Goldring 1923 [Glossocrinidae]
  • Catactotoechus, Hill 1954 [Laccophyllidae]
  • Catadoxides, Matthew 1899 [Trilobita]
  • Catamarcaia [Arcida]
  • Catapleura, Cope 1869 [Thalassemydidae]
  • Catapsydrax [Foraminifera]
  • Cataraquicrinus, Kolata 1983 [Crinoidea]
  • Catasigaloceras [Kosmoceratidae]
  • Catasolenopleura, Qiu 1983 [Ptychopariida]
  • Catastroboceras [Nautilida]
  • Catatonocrinus, Brett 1981 [Crinoidea]
  • Catatrypa [Atrypidae]
  • Catazyga, Hall and Clarke 1893 [Anazygidae]
  • Catella, Healey 1908 [Parallelodontidae]
  • Catenariopsis [Cheilostomata]
  • Catenicella [Catenicellidae]
  • Catenipora, Lamarck 1816 [Halysitidae]
  • Catenoscala [Neotaenioglossa]
  • Catenotoma [Neogastropoda]
  • Cathaysia [Productellidae]
  • Cathetocrinus, Knapp 1969 [Cladida]
  • Catillicephala, Raymond 1937 [Catillicephalidae]
  • Catillocrinus, Shumard 1886 [Crinoidea]
  • Catilon [Neogastropoda]
  • Catinula [Gryphaeidae]
  • Cativella, Coryell and Fields 1937 [Podocopida]
  • Catopygus [Nucleolitidae]
  • Catoraphinoceras, Ulrich and Foerste 1936 [Protocycloceratidae]
  • Catulloceras [Hildoceratidae]
  • Catuniella, Egorova 1956 [Conokephalinidae]
  • Catyrephoceras, Foerste 1926 [Lechritrochoceratidae]
  • Caucacrocrinus, Moore and Strimple 1969 [Monobathrida]
  • Caucasella [Neotaenioglossa]
  • Caucasella [Erymnariidae]
  • Caucasicus [Spumellaria]
  • Caucasina [Rotaliina]
  • Caucasiproductus [Sentosiidae]
  • Caucasites, A. A. Shevyrev 1968 [Gymnitidae]
  • Caudites, Coryell and Fields 1937 [Hemicytheridae]
  • Caudriella [Foraminifera]
  • Caulaspina, Rozova 1963 [Lonchocephalidae]
  • Caulaspis, Rozova 1960 [Asaphida]
  • Caulastrea (Dana 1846) [Faviidae]
  • Caulophacus [Lyssacinosa]
  • Caumontisphinctes [Parkinsoniidae]
  • Cautotriphora, Laws 1940 [Triphoridae]
  • Cava [Cyclostomata]
  • Cavanechinus [Echinocystitoida]
  • Cavaria [Cyclostomata]
  • Cavarinella [Cyclostomata]
  • Cavaspongia, Pessagno 1973 [Cavaspongiidae]
  • Cavatisinurostrum [Pugnacidae]
  • Caveacus [Problematica]
  • Cavellina [Cavellinidae]
  • Caveola, L. W. Stephenson 1941 [Cancellariidae]
  • Cavernisa [Neotaenioglossa]
  • Cavernolites [Hyolithida]
  • Cavhithis [Palaeocopida]
  • Cavilabium [Neotaenioglossa]
  • Cavilasma [Anthozoa]
  • Cavilentia, Ruzhencev and Bogoslovskaya 1971 [Nomismoceratidae]
  • Cavilinga, Chavan 1937 [Lucinidae]
  • Cavilucina, Fischer 1887 [Lucinidae]
  • Cavispongia, Quenstedt 1877 [Lychniscosa]
  • Caviumbonia [Neotaenioglossa]
  • Cavolina (Avilgaard 1791) [Cavoliniidae]
  • Cavopleura [Palaeocopida]
  • Cavusgnathus, Harris and Hollingsworth 1933 [Polygnathidae]
  • Caytonidea [Podocopida]
  • Cayutoceras, Flower 1939 [Pseudorthoceratidae]
  • Caznaia, Shergold 1975 [Asaphida]
  • Ceata [Cyclostomata]
  • Ceciliaphyllum [Anthozoa]
  • Cecrops, Pessagno 1977 [Pantanelliidae]
  • Cedaraspis, Ivshin 1960 [Ptychopariida]
  • Cedarellus, Lazerenko 1966 [Ptychopariida]
  • Cedaria, Walcott 1924 [Cedariidae]
  • Cedarina, Lochman 1940 [Cedariidae]
  • Cedarvilleoceras [Orthocerida]
  • Cederstroemia, Siverson 1995 [Chondrichthyes]
  • Cedocamia [Ostracoda]
  • Cedulia [Chonetidae]
  • Ceidmonea [Cyclostomata]
  • Cekovia, Snajdr 1956 [Styginidae]
  • Celaeceras, J. J. Sepkoski 2002 [Auguritidae]
  • Celdobolus [Siphonotretidae]
  • Celechopora, Pradacova 1938 [Pachyporidae]
  • Celechovites [Ostracoda]
  • Celidocrania, Zhu and Xue 1985 [Craniidae]
  • Cellana, Adams 1869 [Patellidae]
  • Cellaria, Ellis and Solander 1786 [Cellariidae]
  • Cellarinella [Sclerodomidae]
  • Cellarinidra [Cheilostomata]
  • Cellepora, Linnaeus 1767 [Celleporidae]
  • Celleporaria, Lamouroux 1821 [Lepraliellidae]
  • Celleporella [Hippothoidae]
  • Celleporina, Gray 1848 [Celleporidae]
  • Cellicyathus [Archaeocyathida]
  • Cellonina [Psammosphaeridae]
  • Cellulipora [Cyclostomata]
  • Celmus, Angelin 1854 [Raymondinidae]
  • Celox [Nautilida]
  • Celsifornix [Strophopleuridae]
  • Celtanoplia [Anopliidae]
  • Celtencrinurus, Evitt and Tripp 1977 [Phacopida]
  • Celtocrinus, Donovan and Cope 1989 [Monobathrida]
  • Cementula [Serpulimorpha]
  • Cenellipsis [Spumellaria]
  • Cenoceras, Hyatt 1884 [Nautilidae]
  • Cenocrinus, Thomson 1864 [Isselicrinidae]
  • Cenodiscaella [Spumellaria]
  • Cenodiscus [Spumellaria]
  • Cenolarcopyle [Spumellaria]
  • Cenomanella [Neotaenioglossa]
  • Cenomanina [Agatheliidae]
  • Cenomanocarcinus, V. Van Straelen 1936 [Cenomanocarcinidae]
  • Cenosphaera, Ehrenberg 1854 [Actinommidae]
  • Centauropyge, Haas 1968 [Acastidae]
  • Centracanthus, Rafinesque 1810 [Perciformes]
  • Centrifuga [Neogastropoda]
  • Centriocrinus, Bather 1899 [Monobathrida]
  • Centristela, Tsyganko 1967 [Centristelidae]
  • Centroberyx, Gill 1862 [Berycidae]
  • Centrobotrys, Petrushevskaya 1965 [Cannobotryidae]
  • Centrocardita, Sacco 1899 [Carditidae]
  • Centroceras, Hyatt 1884 [Centroceratidae]
  • Centrocyrtoceras, Foerste 1926 [Barrandoceratidae]
  • Centrocyrtocerina [Ellesmerocerida]
  • Centrocythere [Podocopida]
  • Centrolitoceras, Flower 1945 [Rutoceratidae]
  • Centronea [Cyclostomata]
  • Centronella [Centronellidae]
  • Centronelloidea [Dielasmatidae]
  • Centroonoceras, Kobayashi 1934 [Sactorthoceratidae]
  • Centrophoroides, Davis 1887 [Squaliformes]
  • Centrophorus, Mller and Henle 1837 [Centrophoridae]
  • Centropleura, Angelin 1854 [Centropleuridae]
  • Centropomus, Lacpde 1802 [Perciformes]
  • Centropristis, Cuvier 1829 [Serranidae]
  • Centropterus, Costa 1856 [Squaliformes]
  • Centropygus [Cassiduloida]
  • Centrorhynchus [Trigonirhynchiidae]
  • Centrorizoceras, Foerste 1930 [Oncoceratidae]
  • Centrosqualus, Signeux 1950 [Squaliformes]
  • Centrostephanus [Diadematidae]
  • Centrotarphyceras, Ulrich and Foerste 1936 [Tarphyceratidae]
  • Ceotinella, Pantic 1975 [Ceotinellidae]
  • Cepatia [Naticidae]
  • Cephalaspida, order, Fischer 1883 [Gastropoda]
  • Cephalaspidiformes, order [Cephalaspidomorphi]
  • Cephalites [Lychniscosa]
  • Cephalochordata, class, Haeckel 1866 [Chordata]
  • Cephalodiscida, order [Pterobranchia]
  • Cephalodiscus [Cephalodiscida]
  • Cephalograptus [Graptoloidea]
  • Cephalopoda, class, Cuvier 1798 [Mollusca]
  • Cephalopyge, Geyer 1988 [Weymouthiidae]
  • Cephalopyramis [Nassellaria]
  • Cephaloraphidites, Schrammen 1899 [Cephaloraphiditidae]
  • Cephaloxeniformes, order [Osteichthyes]
  • Cepola, Linnaeus 1764 [Perciformes]
  • Cerabonusoides [Radiodonta]
  • Ceragnostus [Agnostida]
  • Ceramella [Cystoporata]
  • Ceramisia [Dyscoliidae]
  • Ceramograptus [Graptolithina]
  • Ceramophylla [Cystoporata]
  • Ceramopora [Cystoporata]
  • Ceramoporella [Cystoporata]
  • Ceramurus, Egerton 1845 [Pholidophoridae]
  • Ceraostroma [Axinellida]
  • Cerarchocyrtium, Deflandre 1973 [Archocyrtiidae]
  • Cerasmocrinus, Strimple and Levorson 1973 [Monobathrida]
  • Cerastoderma, Mörch 1853 [Cardiidae]
  • Ceratammina [Psammosphaeridae]
  • Ceratarges, Guerich 1901 [Lichidae]
  • Ceratia, H. Adams and A. Adams 1850 [Iravadiidae]
  • Ceratiocaris [Archaeostraca]
  • Ceratites, de Haan 1825 [Ceratitidae]
  • Ceratitida, order, A. Hyatt 1884 [Cephalopoda]
  • Ceratoblastus, J. Wanner 1940 [Fissiculata]
  • Ceratobolbina [Palaeocopida]
  • Ceratobulimina, Toula 1915 [Cassidulinidae]
  • Ceratocancris [Foraminifera]
  • Ceratocara, Ramsköld 1991 [Odontopleuridae]
  • Ceratocephala, Warder 1838 [Odontopleuridae]
  • Ceratocoenia, Tomes 1884 [Amphiastreidae]
  • Ceratoconcha, Kramberger-Gorjanovic 1889 [Pyrgomatidae]
  • Ceratocratia [Podocopida]
  • Ceratocrinus, Wanner 1937 [Cladida]
  • Ceratocypris [Ostracoda]
  • Ceratocystis [Cornuta]
  • Ceratodictya [Reticulosa]
  • Ceratoichthys, Blot 1969 [Perciformes]
  • Ceratoikiscum, Deflandre 1953 [Ceratoikiscidae]
  • Ceratolamarckina [Foraminifera]
  • Ceratoleperditia, Harris 1960 [Leperditicopida]
  • Ceratolichas, Hall and Clarke 1888 [Lichida]
  • Ceratolithus, Lu 1959 [Asaphida]
  • Ceratomya, Sandberger 1864 [Ceratomyidae]
  • Ceratomyopsis, Cossmann 1915 [Ceratomyopsidae]
  • Ceratonurus, Prantl and Pribyl 1949 [Odontopleuridae]
  • Ceratophyllia, Fritsch 1878 [Faviidae]
  • Ceratophyllum, Gürich 1896 [Disphyllidae]
  • Ceratoporella, Hickson 1911 [Ceratoporellidae]
  • Ceratoproetus, Poulson 1937 [Proetida]
  • Ceratopsis [Palaeocopida]
  • Ceratopyge, Hawle and Corda 1847 [Ceratopygidae]
  • Ceratoscopelus [Myctophidae]
  • Ceratostreon, Bayle 1878 [Gryphaeidae]
  • Ceratotheca, Novak 1886 [Ceratothecidae]
  • Ceratothecia, Turnsek 1972 [Montlivaltiidae]
  • Ceratotrochus, Milne-Edwards and Haime 1848 [Caryophylliidae]
  • Ceratpbeloceras [Agoniatitida]
  • Ceratreta, Bell 1941 [Ceratretidae]
  • Ceraurinium, Pribyl and Vanek 1985 [Phacopida]
  • Ceraurinus, Barton 1913 [Cheiruridae]
  • Cerauroides, Prantl and Pribyl 1947 [Cheiruridae]
  • Cerauromeros, Pribyl and Vanek 1985 [Cheiruridae]
  • Cerauropeltis, Pribyl and Vanek 1985 [Phacopida]
  • Ceraurus, Green 1832 [Cheiruridae]
  • Cerberatrypa [Septatrypidae]
  • Cercidocrinus, Kirk 1938 [Cladida]
  • Cercomya, Agassiz 1843 [Laternulidae]
  • Cereiophyllia (Barta-Calmus 1973) [Faviidae]
  • Ceresiosaurus, Peyer 1931 [Nothosauridae]
  • Ceriaster, Lindström 1883 [Stauriidae]
  • Ceriocava, d'Orbigny 1849 [Cavidae]
  • Ceriocysta, Zhavoronkova 1976 [Cystiphyllidae]
  • Ceriodictyon [Lychniscosa]
  • Cerioelasma [Anthozoa]
  • Cerioheterastraea, Cuif 1976 [Stylophyllidae]
  • Ceriopora [Cyclostomata]
  • Cerioporella [Cyclostomata]
  • Ceriphyllum [Anthozoa]
  • Ceristella [Anthozoa]
  • Ceritella, Morris and Lycett 1851 [Cephalaspida]
  • Cerithidea, Swainson 1840 [Potamididae]
  • Cerithideops [Neotaenioglossa]
  • Cerithideopsis [Neotaenioglossa]
  • Cerithidium, Monterosato 1884 [Cerithiidae]
  • Cerithiella, Verrill 1882 [Triforidae]
  • Cerithina [Neotaenioglossa]
  • Cerithinella, Gemmellaro 1878 [Cerithiidae]
  • Cerithioclava [Neotaenioglossa]
  • Cerithiocyga [Neotaenioglossa]
  • Cerithioderma, Conrad 1860 [Trichotropidae]
  • Cerithiomorpha [Neotaenioglossa]
  • Cerithiopsida [Neotaenioglossa]
  • Cerithiopsidella, Bartsch 1911 [Cerithiopsidae]
  • Cerithiopsis, Hanley 1849 [Cerithiopsidae]
  • Cerithiscala [Neotaenioglossa]
  • Cerithium, Bruguière 1789 [Cerithiidae]
  • Cerithopsina [Neotaenioglossa]
  • Cermataspis, Opik 1967 [Acrocephalitidae]
  • Cermatops, Shergold 1980 [Trilobita]
  • Cerninella [Palaeocopida]
  • Cerobertina [Foraminifera]
  • Cerobertinella [Foraminifera]
  • Ceromyella [Pholadomyida]
  • Ceroniola [Cardiida]
  • Ceronocare, Shergold 1975 [Asaphida]
  • Cershiites [Palaeocopida]
  • Cerullia [Cardiida]
  • Cessipylorum [Spumellaria]
  • Cestites [Problematica]
  • Cestobrissus [Spatangoida]
  • Cestocrinus, Kirk 1940 [Cladida]
  • Cetorhinus, de Blainville 1816 [Cetorhinidae]
  • Chabactoceras [Ellesmerocerida]
  • Chablaisia [Foraminifera]
  • Chaceia [Myoida]
  • Chacomurus, Branisa and Vanek 1973 [Phacopida]
  • Chadwickoceras, Foerste 1930 [Acleistoceratidae]
  • Chaenocardia, Meek 1869 [Chaenocardiidae]
  • Chaenogaleus, Gill 1861 [Hemigaleidae]
  • Chaetetella, Sokolov 1962 [Chaetetidae]
  • Chaetetes, Fischer von Waldheim 1829 [Chaetetidae]
  • Chaetetipora, Struve 1898 [Chaetetidae]
  • Chaetetopsis [Tabulospongida]
  • Chaetognatha, phylum, Leuckart 1854 [Scalidophora]
  • Chaetopleura, Shuttleworth 1853 [Chaetopleuridae]
  • Chaetosalpinx [Serpulimorpha]
  • Chaeturichthys, Richardson 1844 [Perciformes]
  • Chaganella [Hesperomenidae]
  • Chagrinia, Schaeffer 1962 [Coelacanthiformes]
  • Chainodictyon [Chainodictyonidae]
  • Chaivella [Mitrata]
  • Chakassicyathus [Ajacicyathida]
  • Chakasskia, Poletayeva 1936 [Trilobita]
  • Chalalabelus [Belemnitida]
  • Chalcidichthys, David 1943 [Perciformes]
  • Chalcidophyllum, Pedder 1965 [Disphyllidae]
  • Chalfontia, Shergold 1982 [Dokimocephalidae]
  • Chalilovella [Foraminifera]
  • Chalimochonetes [Chonetidae]
  • Chalmasia [Pterioida]
  • Chamaesipho [Cirripedia]
  • Chamelea, Mörch 1853 [Veneridae]
  • Chametrachea [Cardiidae]
  • Chamishaella [Paraparchitidae]
  • Chamoussetia [Cadoceratidae]
  • Championodictya [Cryptostomata]
  • Champlainia, Howell 1937 [Ptychopariida]
  • Champlainopora [Trepostomida]
  • Chanasia [Oppeliidae]
  • Chancelloria, Walcott 1920 [Chancelloriidae]
  • Chancelloriida, order, Walcott 1920 [Coeloscleritophora]
  • Chancia, Walcott 1924 [Alokistocaridae]
  • Chanciaopsis, Sunbe 1994 [Ptychopariida]
  • Chanda, Hamilton 1822 [Perciformes]
  • Changaspis, Lee 1961 [Oryctocephalidae]
  • Changhsingoceras, Zhao and Liang 1965 [Cyclolobidae]
  • Changia, Sun 1924 [Ptychaspididae]
  • Changicyathus [Archaeocyathida]
  • Changjianggouphyllum [Anthozoa]
  • Changkiuoceras, Shimizu and Obata 1935 [Cephalopoda]
  • Changninocrinus, Chen Yao and Yu 1985 [Crinoidea]
  • Changqingia, Lu and Zhu 1983 [Solenopleuridae]
  • Changshabaella, Huo and Shu 1982 [Bradoriida]
  • Changshaispirifer [Adolfiidae]
  • Changshania, Sun 1924 [Changshaniidae]
  • Changshanocephalus, Sun 1935 [Ptychopariida]
  • Changtangella [Ambocoeliidae]
  • Changyangnia [Myodocopida]
  • Changyangrhynchus [Wellerellidae]
  • Chankacyathus [Archaeocyathida]
  • Chanopsis, Casier 1961 [Gonorhynchiformes]
  • Chanos, Lacpde 1803 [Chanidae]
  • Chaoaspis, Chang 1966 [Redlichiidae]
  • Chaohuceras [Endocerida]
  • Chaohusaurus, Young and Dong 1972 [Grippiidae]
  • Chaoiella [Productellidae]
  • Chaoina [Productida]
  • Chapadella [Meganterididae]
  • Chaperia [Hippuritida]
  • Chaperia [Chaperiidae]
  • Chapmanicythereis [Podocopida]
  • Chapmanina [Foraminifera]
  • Chapmanites [Metacopida]
  • Characodoma [Cheilostomata]
  • Charactoceras, Foerste 1924 [Apsidoceratidae]
  • Charactocerina, Foerste 1935 [Apsidoceratidae]
  • Charactocrinus, Brett 1981 [Crinoidea]
  • Charactophyllum, Simpson 1900 [Disphyllidae]
  • Charadreum [Neotaenioglossa]
  • Charadriiformes, order, Huxley 1867 [Aves]
  • Charassocarcinus [Decapoda]
  • Chardonius, Taverne 1975 [Salmoniformes]
  • Charentia [Charentiidae]
  • Charientocrinus, Goldring 1923 [Glossocrinidae]
  • Chariocephalus, Hall 1863 [Elviniidae]
  • Chariocrinus, Hess 1972 [Isocrinidae]
  • Charionella [Meristellidae]
  • Charionoides [Meristellidae]
  • Charisphyllum [Anthozoa]
  • Charitopsis, Gayet 1993 [Gonorhynchidae]
  • Charitosomus, Marck 1885 [Gonorhynchidae]
  • Charitoxotis [Palaeocopida]
  • Charixa [Cyclostomata]
  • Charleuxia, Heyler 1969 [Palaeonisciformes]
  • Charltonina [Foraminifera]
  • Charonia, Gistel 1848 [Ranellidae]
  • Charonia (Sassia), Bellardi 1872 [Ranellidae]
  • Chartecytis [Cyclostomata]
  • Chartocardium [Cardiida]
  • Chartroniella [Archaeogastropoda]
  • Charybdis, De Haan 1833 [Portunidae]
  • Chascothyris [Stringocephalidae]
  • Chasmataspidida, order, Caster and Brooks 1956 [Merostomata]
  • Chasmataspis [Chasmataspidida]
  • Chasmatopora [Fenestrata]
  • Chasmatoporina [Fenestrata]
  • Chasmazoon [Cheilostomata]
  • Chasmocarcinus, Rathbun 1898 [Chasmocarcinidae]
  • Chasmops, McCoy 1846 [Phacopidae]
  • Chasmotheca, Dall 1904 [Bursidae]
  • Chathamithyris [Terebratellidae]
  • Chatkalagnostus, Khairullina and Abdullaev 1970 [Agnostida]
  • Chatsworthia [Isorophida]
  • Chattertonia [Productellidae]
  • Chatwinothyris [Gibbithyrididae]
  • Chauffouraspis, Pillet 1973 [Proetida]
  • Chauliodus, Schneider 1801 [Stomiatiformes]
  • Chaulistomella [Plaesiomyidae]
  • Chaunax, Lowe 1846 [Lophiiformes]
  • Chaunograptus [Graptolithina]
  • Chaunoproetus, Richter 1919 [Proetidae]
  • Chauvelia [Cornuta]
  • Chauvelicystis [Cornuta]
  • Chauvetia [Neogastropoda]
  • Chavanella [Cardiida]
  • Chavanicerithium [Neotaenioglossa]
  • Chavsakia, Lavrusevich 1959 [Ketophyllidae]
  • Chazydictya [Cryptostomata]
  • Chazyoceras, Flower 1958 [Endoceratidae]
  • Checontonomus [Myodocopida]
  • Chedevillia [Neotaenioglossa]
  • Cheethamia [Cheilostomata]
  • Cheilea, Modeer 1793 [Hipponicidae]
  • Cheilinus, Lacpde 1802 [Perciformes]
  • Cheilocephalus, Berkey 1898 [Cheilocephalidae]
  • Cheiloceras, Frech 1897 [Cheiloceratidae]
  • Cheilohorneropsis [Cheilostomata]
  • Cheilonella [Cheilostomata]
  • Cheilopora [Cheilostomata]
  • Cheiloporina, Canu and Bassler 1923 [Cheiloporinidae]
  • Cheilosmilia, Koby 1888 [Amphiastreidae]
  • Cheilospicata [Thecosomata]
  • Cheilosporites, Wähner 1903 [Cheilosporitiidae]
  • Cheilostomata, order, Busk 1859 [Gymnolaemata]
  • Cheilotrypa [Fistuliporidae]
  • Cheiopteria [Pterioida]
  • Cheiracanthoides, Wells 1944 [Climatiiformes]
  • Cheirocrinus, Eichwald 1856 [Cheirocrinidae]
  • Cheirocystella [Rhombifera]
  • Cheirocystis [Cheirocrinidae]
  • Cheirodopsis, Traquair 1881 [Actinopterygii]
  • Cheirothrix [Alepisauriformes]
  • Cheirothyris [Zeilleriidae]
  • Cheirothyropsis [Cheirothyropsidae]
  • Cheiruroides, Kobayashi 1935 [Oryctocephalidae]
  • Cheirurus, Beyrich 1845 [Cheiruridae]
  • Chejudocythere [Podocopida]
  • Chekiangaspis, Lu 1961 [Olenidae]
  • Chelediscus, Rushton 1966 [Agnostida]
  • Chelidonocephalus, King 1937 [Proasaphiscidae]
  • Chelidozoum [Cheilostomata]
  • Chelmon, Cloquet 1817 [Perciformes]
  • Chelocrinus, Meyer 1837 [Encrinidae]
  • Chelodes, Davidson and King 1874 [Mattheviidae]
  • Chelonechinus [Urechinidae]
  • Chelonia, Brongniart 1800 [Cheloniidae]
  • Chelonibia, Leach 1817 [Chelonibiidae]
  • Cheloniceras, Hyatt 1903 [Douvilleiceratidae]
  • Cheloniellida, order, Broili 1932 [Merostomoidea]
  • Cheloniellon [Cheloniellida]
  • Chelotia, Bayle in Fischer 1885 [Pleurotomariidae]
  • Chelsonella [Orthothecida]
  • Cheltonia [Oxynoticeratidae]
  • Chelyconus, Mörch 1852 [Conidae]
  • Chelyophorus, Agassiz 1845 [Arthrodiriformes]
  • Chelyopsis, Smets 1887 [Cheloniidae]
  • Chelyposuchus, Romer 1966 [Placodontia]
  • Chemnitzia, d'Orbigny 1840 [Pyramidellidae]
  • Chenella [Foraminifera]
  • Chenendopora, Lamouroux 1821 [Chenendoporidae]
  • Chengkouia, Lu and Chang 1974 [Corynexochida]
  • Chenia [Foraminifera]
  • Chensaurus, Mazin Suteethora et al. 1991 [Grippiidae]
  • Cheopsia [Hemiasteridae]
  • Cheramus [Decapoda]
  • Cherkesovaena [Carinatinidae]
  • Chernobaculites [Foraminifera]
  • Chernyshinella [Foraminifera]
  • Chernyshinellina [Foraminifera]
  • Cherskiella [Palaeocopida]
  • Cherubicornea [Machaerariidae]
  • Chesapeakiceras [Cephalopoda]
  • Chesathais [Neogastropoda]
  • Chesterella [Palaeocopida]
  • Chetaites [Cephalopoda]
  • Chevalieria, Melnikova 1984 [Tropidastraeidae]
  • Chevalierismilia [Parasmiliidae]
  • Chevallieria, Cossmann 1888 [Iravadiidae]
  • Chevroleperditia, Swartz 1949 [Leperditicopida]
  • Chia, Lin 1958 [Syringoporidae]
  • Chiapasella [Radiolitidae]
  • Chiarumanipyge, Branisa and Vanek 1973 [Phacopida]
  • Chiastoclonella [Demospongea]
  • Chiastodus, Trautschold 1879 [Eugeneodontiformes]
  • Chiastolus [Acantharia]
  • Chibapsetta, Sakamoto and Uyeno 1988 [Pleuronectiformes]
  • Chicagooceras, Foerste and Savage 1927 [Orthocerida]
  • Chichia, Liu and Wang 1978 [Palaeonisciformes]
  • Chicoreus, Monfort 1810 [Muricidae]
  • Chidleyenoceras, Shimizu and Obata 1935 [Apsidoceratidae]
  • Chielasma, Minato and Kato 1965 [Waagenophyllidae]
  • Chienaspis, Suvorova 1964 [Corynexochida]
  • Chihlioceras, Grabau 1922 [Chihlioceratidae]
  • Chihsiaphyllum, Minato and Kato 1965 [Waagenophyllidae]
  • Chiiengphoherus [Decapoda]
  • Chilara, Jordan and Evermann 1896 [Ophidiiformes]
  • Chile [Chileidae]
  • Chileida, order, Popov and Tikhonov 1990 [Chileata]
  • Chileutomia, Tate and Cossmann 1898 [Eulimidae]
  • Chilianshania [Monticuliferidae]
  • Chilidiopsis [Chilidiopsidae]
  • Chilidorthis [Bohemiellidae]
  • Chilobolbina [Palaeocopida]
  • Chilocyclus [Neotaenioglossa]
  • Chilodonta, Etallon 1859 [Chilodontidae]
  • Chilodontoidea, Hudleston 1896 [Chilodontidae]
  • Chiloguembelina [Chiloguembelinidae]
  • Chiloguembelitria [Foraminifera]
  • Chilometopus, Rusconi 1952 [Corynexochida]
  • Chilomycterus, Bribon 1846 [Diodontidae]
  • Chilonorria, Rusconi 1952 [Corynexochida]
  • Chilopora [Cyclostomata]
  • Chiloscyllium, Mller and Henle 1837 [Hemiscylliidae]
  • Chilostomella [Chilostomellidae]
  • Chilostomelloides [Foraminifera]
  • Chilostomina [Foraminifera]
  • Chimaeriformes, order, Obruchev 1953 [Chondrichthyes]
  • Chimaeropsis, Zittel 1887 [Chimaeropsidae]
  • Chimaerothyris [Adolfiidae]
  • Chimela, Casey 1952 [Veneridae]
  • Chinacrinus, Lane and Waters 1997 [Monobathrida]
  • Chinensis [Trilobita]
  • Chinianocarpos [Mitrata]
  • Chion [Cardiida]
  • Chione, von Mühlfield 1811 [Veneridae]
  • Chionelasmus, Pilsbry 1911 [Chionolasmatidae]
  • Chionella, Cossmann 1886 [Veneridae]
  • Chioneryx [Cardiida]
  • Chionista, Keen 1958 [Veneridae]
  • Chionopsis, Olsson 1932 [Veneridae]
  • Chiozoon, Lane 1972 [Cheiruridae]
  • Chiralithes [Neogastropoda]
  • Chirocentrites [Cladocyclidae]
  • Chirocentrus, Cuvier 1817 [Chirocentridae]
  • Chirocrinus, Angelin 1878 [Crinoidea]
  • Chirodella [Conodontophorida]
  • Chirodipterus [Chirodipteridae]
  • Chirognathus [Conodontophorida]
  • Chirona, Gray 1835 [Archaeobalanidae]
  • Chironiptrum [Palaeocopida]
  • Chiropinna, Moore 1962 [Crinoidea]
  • Chirospongia [Hexactinellida]
  • Chirostoma, Swainson 1839 [Atheriniformes]
  • Chirothrix, Zittel 1888 [Actinopterygii]
  • Chisiloceras [Endocerida]
  • Chisma [Cyclostomata]
  • Chitinodendron, Eisenack 1938 [Lagynidae]
  • Chitinoidella [Calpionellida]
  • Chitinolagena [Allogromiidae]
  • Chitinoteuthis [Aulacocerida]
  • Chitonastrum, Haeckel 1881 [Spongodiscidae]
  • Chitonotus, Lockington 1881 [Scorpaeniformes]
  • Chitralina [Foraminifera]
  • Chittidilla, King 1941 [Agraulidae]
  • Chladocrinus, Agassiz 1836 [Isocrinidae]
  • Chlamydophyllum, Pocta 1902 [Kodonophyllidae]
  • Chlamydoselachus, Garman 1884 [Notidanidae]
  • Chlamys, Röding 1798 [Pectinidae]
  • Chlamys (Placopecten), Verrill 1897 [Pectinidae]
  • Chlathrus [Neotaenioglossa]
  • Chlidoniopsis [Chlidoniopsidae]
  • Chlidonocrinus, Strimple and Watkins 1969 [Ampelocrinidae]
  • Chlinocephalus, Ristori 1886 [Euryplacidae]
  • Chloridella [Stomatopoda]
  • Chlorodiella, Rathbun 1897 [Xanthidae]
  • Chlorophthalmus, Bonaparte 1840 [Chlorophthalmidae]
  • Chlorostoma, Swainson 1840 [Trochidae]
  • Chlupacina [Strophochonetidae]
  • Chlupacitoechia [Glossinotoechiidae]
  • Chnaurocoelia [Reticulariidae]
  • Choanoceras, Lindström 1890 [Choanoceratidae]
  • Choanoplasma [Anthozoa]
  • Choffatella, Schlumberger 1905 [Cyclamminidae]
  • Choffatia [Perisphinctidae]
  • Choffaticeras, Hyatt 1903 [Pseudotissotiidae]
  • Choia, Walcott 1920 [Choiidae]
  • Cholocrinus [Sagenocrinida]
  • Cholopilus, Raymond 1924 [Corynexochida]
  • Chomatomediocris [Foraminifera]
  • Chomatoseris, Thomas 1935 [Microsolenidae]
  • Chonaxis, Milne-Edwards and Haime 1851 [Lithostrotionidae]
  • Chondagraulos [Corynexochida]
  • Chondranomocare, Pospelov and Fedyanina 1958 [Asaphida]
  • Chondrastaulina [Ptychopariida]
  • Chondraulus [Trepostomida]
  • Chondrenchelyiformes, order, Moy-Thomas 1939 [Chondrichthyes]
  • Chondrenchelys, Traquair 1888 [Chondrenchelyidae]
  • Chondrinouyina, Repina 1965 [Corynexochida]
  • Chondroceras [Sphaeroceratidae]
  • Chondrocidaris [Cidaridae]
  • Chondrocladia [Poecilosclerida]
  • Chondrodonta, Stanton 1901 [Chondrodontidae]
  • Chondroparia, Lorenz 1906 [Trilobita]
  • Chondroplon [Medusae]
  • Chondroteuthis [Belemnitida]
  • Chonellopsis, Schrammen 1937 [Platychoniidae]
  • Chonespondylus, Leidy 1868 [Reptilia]
  • Chonetina [Anopliidae]
  • Chonetinella, Ramsbottom 1952 [Rugosochonetidae]
  • Chonetipustula [Araksalosiidae]
  • Chonetoidea, Jones 1928 [Aegiromenidae]
  • Choniocardia, Cossmann 1904 [Carditidae]
  • Chonopectoides [Monticuliferidae]
  • Chonopectus [Productellidae]
  • Chonophyllum, Milne-Edwards and Haime 1850 [Arachnophyllidae]
  • Chonostegites, Milne-Edwards and Haime 1851 [Chonostegitidae]
  • Chonostrophia [Chonostrophiidae]
  • Chonostrophiella [Chonostrophiidae]
  • Choperella [Ambocoeliidae]
  • Choreanoceroides [Endocerida]
  • Chorilia, Dana 1851 [Epialtidae]
  • Choristitella [Choristitidae]
  • Choristites, Fischer de Waldheim 1825 [Choristitidae]
  • Choristoceras, Hauer 1865 [Choristoceratidae]
  • Choristograptus [Dendroidea]
  • Choristopetalum [Cyclostomata]
  • Choristothyris [Terebrataliidae]
  • Chorizopora [Chorizoporidae]
  • Chorus, Gray 1847 [Thaisidae]
  • Chosenia, Kobayashi 1934 [Ptychopariida]
  • Chosonodina [Conodontophorida]
  • Chostophyllum, Pedder 1982 [Disphyllidae]
  • Chotecops, Chlupac 1971 [Phacopidae]
  • Choubertella, Hupé 1952 [Fallotaspididae]
  • Chouberticyathus [Archaeocyathida]
  • Chouteauoceras, Miller and Garner 1953 [Trigonoceratidae]
  • Christianella [Christianiidae]
  • Christiania, Hall and Clarke 1892 [Christianiidae]
  • Christinella [Cheilostomata]
  • Christioceras, Nassichuk and Furnish 1965 [Christioceratidae]
  • Christitys [Neogastropoda]
  • Christophoceras [Cephalopoda]
  • Chromis, Lacpde 1802 [Perciformes]
  • Chrotichthys, Wade 1940 [Perleidiformes]
  • Chrustenopora [Chrustenoporidae]
  • Chrysalidina [Foraminifera]
  • Chrysalidinella [Foraminifera]
  • Chrysallida, Carpenter 1856 [Pyramidellidae]
  • Chrysalogonium [Nodosariidae]
  • Chrysame [Mitridae]
  • Chrysoceras [Discosorida]
  • Chrysocythere [Podocopida]
  • Chrysolepis, Lebedev 1983 [Coelacanthiformes]
  • Chrysostoma, Swainson 1840 [Trochidae]
  • Chrysothurammina [Foraminifera]
  • Chthamalus, Ranzani 1817 [Chthamalidae]
  • Chuanbeiphyllum, He 1978 [Phillipsastreidae]
  • Chuandianella, Hou and Bergström 1991 [Waptiidae]
  • Chuangia, Walcott 1911 [Leiostegiidae]
  • Chuangiella, Kobayashi 1935 [Leiostegiidae]
  • Chuangiformis [Ptychopariida]
  • Chuangiopsis, Kobayashi 1955 [Corynexochida]
  • Chuanqianoproetus [Proetidae]
  • Chubbina [Rhapydioninidae]
  • Chuchiaspis, Chang 1974 [Corynexochida]
  • Chulanolenus, Zhang 1983 [Ptychopariida]
  • Chumazites, J. J. Sepkoski 2002 [Rhymmoceratidae]
  • Chungkingichthyes [Ptycholepiformes]
  • Chuniola [Loveniidae]
  • Churanocyathus [Ajacicyathida]
  • Churkinia, Palmer 1968 [Redlichiida]
  • Chusenella [Schwagerinidae]
  • Chuticeras [Discosorida]
  • Chynistrophia [Leptostrophiidae]
  • Cianotremella [Cheilostomata]
  • Cibicides, Monfort 1808 [Cibicididae]
  • Cibicidina [Foraminifera]
  • Cibicidoides [Cibicididae]
  • Cibicorbis [Foraminifera]
  • Cicatellia [Cardiida]
  • Cicatrea [Cardiida]
  • Cicatrites [Cephalopoda]
  • Ciceragnostus, Kobayashi 1937 [Peronopsidae]
  • Cicerocrinus, Sollas 1900 [Pisocrinidae]
  • Ciclopecten, Seguenza 1877 [Pectinidae]
  • Cidarina, Dall 1909 [Calliotropidae]
  • Cidaris, Leske 1778 [Cidaridae]
  • Cidaropsis [Hemicidaridae]
  • Cigara [Eocrinoidea]
  • Cigelirina [Neogastropoda]
  • Cilara [Neogastropoda]
  • Ciliatocardium, Kafanov 1974 [Cardiidae]
  • Cilinella [Heterorthidae]
  • Ciliocephalus, Liu 1977 [Ptychopariida]
  • Ciliophora, phylum [Biciliata]
  • Ciliscutellum, Lin 1987 [Ptychopariida]
  • Cillia [Cheilostomata]
  • Cimicinella [Cimicinellidae]
  • Cimicinoides [Cimicinellidae]
  • Cimoliasaurus, J. Leidy 1851 [Elasmosauridae]
  • Cimolichthys, J. Leidy [Enchodontidae]
  • Cimoliocentrum [Neotaenioglossa]
  • Cimolithium, Cossmann 1906 [Neotaenioglossa]
  • Cimomia, Conrad 1866 [Hercoglossidae]
  • Cincinnaticoncha [Palaeocopida]
  • Cincinnaticrinus, Warn and Strimple 1977 [Crinoidea]
  • Cincinnatidiscus, Bassler 1935 [Hemicystitidae]
  • Cincliderma [Hexactinosa]
  • Cinclopyramis, Haeckel 1879 [Acropyramididae]
  • Cincoriola [Foraminifera]
  • Cincta [Zeilleriidae]
  • Cincta, order [Homostelea]
  • Cinctifera [Productellidae]
  • Cinctipora [Cyclostomata]
  • Cinctoceras, Flower 1957 [Mandaloceratidae]
  • Cinctopsis [Zeilleriidae]
  • Cinerorthis [Glyptorthidae]
  • Cingolospiriferina [Spiriferinidae]
  • Cingula, Fleming 1818 [Rissoidae]
  • Cingulella [Obolellida]
  • Cingulina [Pyramidellidae]
  • Cinguliturris [Neogastropoda]
  • Cingulochitina [Rhizopodea]
  • Cingulodermis [Tenellodermidae]
  • Cinulia, Gray 1847 [Ringiculidae]
  • Cionobrissus [Brissidae]
  • Cionodendron, Benson and Smith 1923 [Lithostrotionidae]
  • Ciperozea [Foraminifera]
  • Cipliacella [Chamidae]
  • Circe, Schumacher 1817 [Veneridae]
  • Circeis [Serpulimorpha]
  • Circibiopora [Cyclostomata]
  • Circinatiella [Nubeculariidae]
  • Circomphalus, Mörch 1853 [Veneridae]
  • Circonularia [Scyphozoa]
  • Circophyllia, Milne-Edwards and Haime 1848 [Mussidae]
  • Circophyllum, Lang and Smith 1939 [Kodonophyllidae]
  • Circopora [Axinellida]
  • Circothecida, order, Sysoev 1968 [Orthothecimorpha]
  • Circulaforma, Cheng 1986 [Ceratoikiscidae]
  • Circulina, J. J. Sepkoski 2002 [Palaeocopida]
  • Circulocrania, Fortey and Owens 1987 [Cyclopygidae]
  • Circulopsis [Ataphridae]
  • Circuloscala [Neotaenioglossa]
  • Circulus, Jeffreys 1842 [Vitrinellidae]
  • Circumtextiphyllum, Kaplan 1971 [Columnariidae]
  • Cirillia [Neogastropoda]
  • Cirolana, Leach 1818 [Cirolanidae]
  • Cirpa [Wellerellidae]
  • Cirquella, Fri 1993 [Olenellida]
  • Cirroceras, Conrad 1866 [Nostoceratidae]
  • Cirrus, J. C. Sowerby 1816 [Cirridae]
  • Cirsocerithium, Cossmann 1906 [Procerithiidae]
  • Cirsochilus, Cossmann 1888 [Ataphridae]
  • Cirsomphalus [Neotaenioglossa]
  • Cirsonella, Angas 1877 [Turbinidae]
  • Cirsope [Neotaenioglossa]
  • Cirsostylus [Archaeogastropoda]
  • Cirsotrema, Mörch 1852 [Epitoniidae]
  • Cisalveolina [Alveolinidae]
  • Cistacythereis [Podocopida]
  • Cistellarcula [Megathyrididae]
  • Citharichthys, Bleeker 1862 [Bothidae]
  • Citharina, d'Orbigny 1839 [Nodosariidae]
  • Citharinella [Foraminifera]
  • Citharus, Reinhardt 1838 [Pleuronectiformes]
  • Citrella [Podocopida]
  • Cittarium, Philippi 1847 [Trochidae]
  • Civrieuxia [Foraminifera]
  • Cladangia, Milne-Edwards and Haime 1851 [Rhizangiidae]
  • Cladarocythere [Podocopida]
  • Cladiscites, E. v. Mojsisovics 1879 [Cladiscitidae]
  • Cladoceramus, Seitz 1961 [Inoceramidae]
  • Cladochitina [Rhizopodea]
  • Cladocora, Ehrenberg 1834 [Faviidae]
  • Cladocoropsis, Felix 1907 [Cladocoropsidae]
  • Cladodermia, Schrammen 1924 [Theonellidae]
  • Cladodia [Demospongea]
  • Cladodictya [Cryptostomata]
  • Cladolithosia [Demospongea]
  • Cladophyllia, Milne-Edwards and Haime 1851 [Amphiastreidae]
  • Cladopora, Hall 1851 [Pachyporidae]
  • Cladorhiza [Poecilosclerida]
  • Cladoselache, Dean 1894 [Cladoselachidae]
  • Cladoselachida, order, Dean 1909 [Chondrichthyes]
  • Cladospyris [Nassellaria]
  • Claibornia [Archaeogastropoda]
  • Claibornites, Stewart 1930 [Lucinidae]
  • Clambites [Cephalopoda]
  • Clanculus, Monfort 1810 [Trochidae]
  • Clanculus (Clanculopsis), Monterosato 1879 [Trochidae]
  • Clappaspis, Deiss 1939 [Alokistocaridae]
  • Claraia, Bittner 1901 [Pterinopectinidae]
  • Claratrypa [Atrypinidae]
  • Clarazia, Peyer 1936 [Thalattosauria]
  • Clarella, Howel 1934 [Centropleuridae]
  • Clariondia, Hupe 1953 [Redlichiida]
  • Clarkeia [Eatoniidae]
  • Clarkeipterus [Eurypterida]
  • Clarkella [Clarkellidae]
  • Clarkeocrinus, Goldring 1923 [Monobathrida]
  • Clarkeolepis [Lepidocoleomorpha]
  • Clarkesvillia, Flower 1946 [Westonoceratidae]
  • Claruscoscinus, R.C. Handfield 1971 [Archaeocyathida]
  • Clathricoscinus [Capsulocyathida]
  • Clathricyathus [Ajacicyathida]
  • Clathrispongia [Porifera]
  • Clathrithyris [Clathrithyrididae]
  • Clathrobaculus [Gordenellidae]
  • Clathroceras, Foerste 1926 [Trimeroceratidae]
  • Clathrochitina [Rhizopodea]
  • Clathrocoilona, Yavorsky 1931 [Stromatoporellidae]
  • Clathrocrinus, H.L. Strimple and R.C. Moore 1971 [Cladida]
  • Clathrocyclas, Haeckel 1881 [Theopiliidae]
  • Clathrodictyella, Bogoyavlenskaya 1965 [Amphiporidae]
  • Clathrodictyon, Nicholson and Murie 1878 [Clathrodictyidae]
  • Clathrodrillia, Dall 1918 [Turridae]
  • Clathrodrillia (Carinodrillia), Dall 1919 [Turridae]
  • Clathromangelia [Neogastropoda]
  • Clathropora [Cryptostomata]
  • Clathroscala [Neotaenioglossa]
  • Clathrospongia [Reticulosa]
  • Clathrospyris [Nassellaria]
  • Clathrostroma [Gerronostromatidae]
  • Clathrus, Oken 1815 [Epitoniidae]
  • Clathurella, Carpenter 1857 [Turridae]
  • Claudiconcha [Petricolina]
  • Claudostriatella [Foraminifera]
  • Clausa [Cyclostomata]
  • Clausastraea (d'Orbigny 1850) [Montlivaltiidae]
  • Clausastraeopsis [Scleractinia]
  • Clausia [Conchyliocarida]
  • Clausinella, Gray 1851 [Veneridae]
  • Clausotrypa [Nikiforovellidae]
  • Clava, Martyn 1784 [Cerithiidae]
  • Clavachitina [Rhizopodea]
  • Clavagella, Blainville 1817 [Clavagellidae]
  • Clavagnostus, Howell 1937 [Clavagnostidae]
  • Clavaspidella, Poulson 1927 [Dolichometopidae]
  • Clavatellus, Poletaeva 1955 [Asaphida]
  • Clavatorella [Foraminifera]
  • Clavatula, Lamarck 1801 [Turridae]
  • Clavellofusus, Grabau 1904 [Fasciolariidae]
  • Clavelloides [Foraminifera]
  • Claviaster [Cassiduloida]
  • Clavibole, Hahn and Brauckmann 1982 [Proetida]
  • Clavicava [Cyclostomata]
  • Claviculacrinus, Donovan 1989 [Crinoidea]
  • Clavidictyon [Stromatoporoidea]
  • Clavidiscus [Isorophida]
  • Clavidrupa [Neogastropoda]
  • Clavigellus, Geyer 1994 [Corynexochida]
  • Clavigera [Diplospirellidae]
  • Clavigerinella [Foraminifera]
  • Clavihedbergella [Foraminifera]
  • Clavilasma, Weyer 1975 [Antiphyllidae]
  • Clavilithes, Swainson 1840 [Fasciolariidae]
  • Clavipholas, Conrad 1868 [Pholadidae]
  • Claviphyllum, Hudson 1942 [Antiphyllidae]
  • Claviporella [Cheilostomata]
  • Clavisparsa [Cyclostomata]
  • Claviticinella [Foraminifera]
  • Clavitubigera [Cyclostomata]
  • Clavocerithium [Cerithiidae]
  • Clavodalejina [Rhipidomellidae]
  • Clavofabella [Palaeocopida]
  • Clavofabellina [Palaeocopida]
  • Clavohamulus [Conodontophorida]
  • Clavstoma [Neogastropoda]
  • Clavulina, d'Orbigny 1826 [Valvulinidae]
  • Clavulinoides [Foraminifera]
  • Clavulinopsis [Foraminifera]
  • Clavulites [Serpulimorpha]
  • Clavus, Monfort 1810 [Turridae]
  • Cleidochasma [Cheilostomata]
  • Cleidochondrella [Pterioida]
  • Cleidothaerus, Stutchbury 1830 [Cleidothaeridae]
  • Cleiocrinus, Billings 1857 [Diplobathrida]
  • Cleiothyridina, Buckman 1906 [Athyrididae]
  • Cleistechinus [Asterostomatidae]
  • Cleistocrinus [Sagenocrinida]
  • Cleistopora, Nicholson 1888 [Cleistoporidae]
  • Cleistosphinctes [Perisphinctidae]
  • Cleithranchiste [Podocopida]
  • Cleithrolepis, Egerton 1864 [Perleididae]
  • Clelandia, Cossman 1902 [Kingstoniidae]
  • Clelandoceras, Ulrich et al. 1944 [Ellesmeroceratidae]
  • Clematocrinus, Jaekel 1898 [Monobathrida]
  • Clementia, Gray 1847 [Veneridae]
  • Cleobula [Conidae]
  • Cleodictya [Reticulosa]
  • Cleoniceras, Parona and Bonarelli 1897 [Hoplitidae]
  • Cleoprion [Coleoloida]
  • Clepsydrospongia [Reticulosa]
  • Cletocythereis [Podocopida]
  • Clibanarius, Dana 1852 [Diogenidae]
  • Clidiophora, P. P. Carpenter 1864 [Pandoridae]
  • Clidochirus [Sagenocrinida]
  • Clidoderma, Bleeker 1862 [Pleuronectiformes]
  • Clifdenella [Calcarea]
  • Clifdenia [Neogastropoda]
  • Cliffia, Wilson 1951 [Phylacteridae]
  • Cliftonia, Foerste 1909 [Triplesiidae]
  • Cliftonoceras, Flower 1957 [Uranoceratidae]
  • Climacammina, Brady 1873 [Palaeotextulariidae]
  • Climacina, Gemmellaro 1878 [Neotaenioglossa]
  • Climacoconus [Scyphozoa]
  • Climacograptus [Diplograptidae]
  • Climacoidea [Podocopida]
  • Climacospongia, Hinde 1884 [Anthaspidellidae]
  • Climacotrigonia [Trigoniida]
  • Climatiiformes, order, Berg 1940 [Acanthodii]
  • Clinambon [Clitambonitidae]
  • Clinapertina [Foraminifera]
  • Clinocardium, Keen 1936 [Cardiidae]
  • Clinoceras, Mascke 1876 [Clinoceratidae]
  • Clinoclimacograptus [Graptoloidea]
  • Clinocythere [Podocopida]
  • Clinopegma, Grant and Gale 1931 [Buccinidae]
  • Clinophyllum, Grove 1935 [Hapsiphyllidae]
  • Clinopista [Nuculida]
  • Clinopora [Cyclostomata]
  • Clintiella [Palaeocopida]
  • Clintonella [Atrypinidae]
  • Clinura, Bellardi 1875 [Turridae]
  • Clinurella [Neogastropoda]
  • Clinuropsis [Neogastropoda]
  • Clinus, Cuvier 1817 [Perciformes]
  • Clio, Linnaeus 1767 [Cavoliniidae]
  • Cliocystiramus [Cystoporata]
  • Cliona [Clionaidae]
  • Clionitites, Strand 1929 [Clionititidae]
  • Clionyssiceras, Foerste 1930 [Acleistoceratidae]
  • Cliopteria [Pterioida]
  • Clioscaphites [Scaphitidae]
  • Cliotrypa [Cystoporata]
  • Clisiophyllum, Dana 1846 [Aulophyllidae]
  • Clisocolus, Gabb 1868 [Mactromyidae]
  • Clistoceras, Nassichuk 1967 [Glaphyritidae]
  • Clistocrinus, Kirk 1937 [Cladida]
  • Clistotrema [Ceratretidae]
  • Clitambonites [Clitambonitidae]
  • Clitendoceras, Ulrich and Foerste 1936 [Proterocameroceratidae]
  • Clithriellum [Cheilostomata]
  • Clithrocytheridea [Podocopida]
  • Clivospirifer [Cyrtospiriferidae]
  • Clivuloturris [Neogastropoda]
  • Cloghergnathus [Conodontophorida]
  • Cloioceras [Cephalopoda]
  • Clonocrinus, Quenstedt 1876 [Monobathrida]
  • Clonograptus, Nicholson 1973 [Dendroidea]
  • Clonopora [Cyclostomata]
  • Clonosmilia, Chevalier 1963 [Scleractinia]
  • Clorinda, Ameghino 1894 [Clorindidae]
  • Clorindella [Clorindidae]
  • Clorindina [Clorindidae]
  • Clorindinella [Clorindidae]
  • Closia [Volutidae]
  • Closteriscus [Neogastropoda]
  • Closterocrinus, Hall 1852 [Monobathrida]
  • Closteroides [Neogastropoda]
  • Cloudella [Meganterididae]
  • Cloudina, Germs 1972 [Cloudinidae]
  • Cloudina [Bellerophontida]
  • Cloudothyris [Centronellidae]
  • Cloughtonia [Neotaenioglossa]
  • Cluniaster [Echinoneoida]
  • Clupavus [Pachycormiformes]
  • Clupeiformes, order, Bleeker 1859 [Actinopteri]
  • Clustinia [Odontopleurida]
  • Cluthia [Podocopida]
  • Cluthoceras, E. D. Currie 1954 [Muensteroceratidae]
  • Clydagnathus [Conodontophorida]
  • Clydomphalites [Clydoniceratidae]
  • Clydonaspis [Pteraspidomorphes]
  • Clydonautilus, Mojsisovics 1882 [Clydonautilidae]
  • Clydoniceras [Clydoniceratidae]
  • Clydonites, Hauer 1860 [Clydonitidae]
  • Clymenia, Münster 1834 [Clymeniidae]
  • Clymeniida, order, J. J. Sepkoski 2002 [Cephalopoda]
  • Clymenoceras, Schindewolf 1938 [Phenacoceratidae]
  • Clymenonautilus, Hyatt in Zittel 1900 [Syringonautilidae]
  • Clypeanthus [Cassiduloida]
  • Clypeina, Michelin 1845 [Polyphysaceae]
  • Clypeola, Gray 1867 [Calyptraeidae]
  • Clypeolampas [Clypeolampadidae]
  • Clypeolum [Archaeogastropoda]
  • Clypeomorus, Jousseaume 1888 [Cerithiidae]
  • Clypeopygus [Nucleolitidae]
  • Clypeorbis [Foraminifera]
  • Clypidina, Gray 1847 [Fissurellidae]
  • Clypoproetus, Begg 1939 [Proetida]
  • Clytiella, Glaessner 1931 [Clytiopsidae]
  • Clytiopsis, Bill 1914 [Clytiopsidae]
  • Clytoceras [Estonioceratidae]
  • Clyxhydra [Hydroida]
  • Cnemaulax [Demospongea]
  • Cnemicopanon [Pharetronida]
  • Cnemidiastrum, Zittel 1878 [Cnemidiastridae]
  • Cnemidopyge, Whittard 1955 [Raphiophoridae]
  • Cnesterium, Dall 1898 [Yoldiidae]
  • Cnestocythere [Podocopida]
  • Cnestriella [Nuculida]
  • Cnidaria, phylum, Hatschek 1888 [Neuralia]
  • Coalcomana [Caprinidae]
  • Coalingodea [Neotaenioglossa]
  • Coanollonia [Archaeogastropoda]
  • Cobbanoscaphites [Cephalopoda]
  • Cobboldiella [Globorilida]
  • Cobboldites, Kobayshi 1943 [Weymouthiidae]
  • Cobcrephora [Polyplacophora]
  • Cobelodus, Zangerl 1973 [Symmoriidae]
  • Cobitopsis, Pomel 1853 [Beloniformes]
  • Coccocephalichthys, Whitley 1940 [Palaeonisciformes]
  • Coccocyclia, Haeckel 1881 [Coccodiscidae]
  • Coccodentalium, Sacco 1896 [Dentaliidae]
  • Coccoderma, Zittel 1887 [Laugiidae]
  • Coccodiscus, Haeckel 1862 [Coccodiscidae]
  • Coccodus [Pycnodontidae]
  • Coccolarcus [Spumellaria]
  • Coccolarnacium, Dumitrica 1989 [Larnacillidae]
  • Coccophyllum, Reuss 1865 [Stylophyllidae]
  • Coccopigya [Archaeogastropoda]
  • Coccoseris, Eichwald 1855 [Coccoserididae]
  • Cocculina, Dall 1882 [Cocculinidae]
  • Cocculinella, Thiele 1909 [Cocculinellidae]
  • Cochiolepis [Vitrinellidae]
  • Cochlearites [Pterioida]
  • Cochleiferoceras, Shimanskiy 1962 [Bactritida]
  • Cochleochilus [Archaeogastropoda]
  • Cochlespira, Conrad 1865 [Turridae]
  • Cochlespirella [Neogastropoda]
  • Cochlespiropsis [Neogastropoda]
  • Cochliconus [Neogastropoda]
  • Cochlioceras, Eichwald 1860 [Baltoceratidae]
  • Cochloceras, Hauer 1860 [Cochloceratidae]
  • Cochlocrioceras, Spath 1950 [Protancyloceratidae]
  • Cochlodesma, Couthouy 1839 [Periplomatidae]
  • Cocoarota [Foraminifera]
  • Codakia, Scopoli 1777 [Lucinidae]
  • Codalucina, Stewart 1930 [Lucinidae]
  • Codaster, F. M'Coy 1849 [Codasteridae]
  • Codiacrinus, L. Schultze 1866 [Cladida]
  • Codiacystis [Diploporita]
  • Codiopsis [Arbaciidae]
  • Codoceras, Hyatt in Zittel 1900 [Polyelasmoceratidae]
  • Codonella [Spirotrichia]
  • Codonellina [Cheilostomata]
  • Codonoconus [Mollusca]
  • Codonofusiella [Schubertellidae]
  • Codonophyllum [Kodonophyllidae]
  • Codonosmilia, Koby 1888 [Rhipidogyridae]
  • Coelacanthopsis [Coelacanthiformes]
  • Coelastarte [Astartidae]
  • Coelenteratella [Anthozoa]
  • Coeliocrinus, White 1863 [Cercidocrinidae]
  • Coelobolma [Archaeogastropoda]
  • Coelocaulis [Cystoporata]
  • Coeloceltites, L. F. Spath 1951 [Ceratitida]
  • Coeloceras [Coeloceratidae]
  • Coelocerodontus [Conodontophorida]
  • Coelochilina [Palaeocopida]
  • Coelocladia, Girty 1908 [Heliospongiidae]
  • Coeloclemis [Stenoporidae]
  • Coelocochlea [Cyclostomata]
  • Coelocoenia, Volz 1896 [Scleractinia]
  • Coeloconia [Pharetronida]
  • Coelocorypha, Zittel 1878 [Azoricidae]
  • Coelocrinus, Meek and Wothen 1865 [Monobathrida]
  • Coelocyprina, Douvill 1921 [Arcticidae]
  • Coelocyrtoceras, Foerste 1926 [Polyelasmoceratidae]
  • Coelocystis [Rhombifera]
  • Coeloderoceras [Phricodoceratidae]
  • Coelodiscus, Broesamlen 1909 [Coelodiscidae]
  • Coelodus, Haeckel [Pycnodontidae]
  • Coeloenellina [Palaeocopida]
  • Coelogasteroceras, Hyatt 1893 [Liroceratidae]
  • Coelograptus [Graptolithina]
  • Coelolasma, Weyer 1973 [Lambelasmatidae]
  • Coelolepis [Coelolepidae]
  • Coeloma, Milne-Edwards 1865 [Mathildellidae]
  • Coelomeandra [Scleractinia]
  • Coelometra, Rasmussen 1978 [Comatulida]
  • Coelonella [Coelonellidae]
  • Coelopis, Munier-Chalmas 1887 [Astartidae]
  • Coelopleurus [Arbaciidae]
  • Coelopora [Cheilostomata]
  • Coeloptychium, Goldfuss 1826 [Coeloptychidae]
  • Coelopus, A. Etallon 1861 [Longodromitidae]
  • Coeloscapha, MacNeil in MacNeil & Dockery 1984 [Cephalaspida]
  • Coeloscleritophora, class, Bengston and Missarzhevsky 1981 [Problematica]
  • Coeloscyphia, Tate 1865 [Polyblastidiidae]
  • Coelospira [Anoplothecidae]
  • Coelospirella [Anoplothecidae]
  • Coelospirina [Anoplothecidae]
  • Coelospiropora [Cyclostomata]
  • Coelosteus, Gross 1930 [Ctenacanthiformes]
  • Coelostylis, Lindström 1880 [Lambelasmatidae]
  • Coeloterorhynchus [Pugnacidae]
  • Coeloteuthis [Belemnitida]
  • Coemansia [Heterostrophia]
  • Coenangia [Rhizangiidae]
  • Coenaphrodia, Jull 1974 [Aphrophyllidae]
  • Coenaspis, Resser 1938 [Ptychopariida]
  • Coenastraea, Etallon 1859 [Actinastreidae]
  • Coenites, Eichwald 1829 [Coenitidae]
  • Coenobita, Latreille 1829 [Coenobitidae]
  • Coenocyathus, Milne-Edwards and Haime 1848 [Caryophylliidae]
  • Coenostella [Axinellida]
  • Coenostroma, Winchell 1867 [Coenostromatidae]
  • Coenothyris, Douvill 1879 [Dielasmatidae]
  • Coignops, Gandl 1980 [Proetida]
  • Coilopoceras, Hyatt 1903 [Coilopoceratidae]
  • Colacchilina [Palaeocopida]
  • Colania [Foraminifera]
  • Colaniella [Colaniellidae]
  • Colapterochiton [Neoloricata]
  • Colaptomena, Cooper 1956 [Rafinesquinidae]
  • Colchidites [Ancyloceratidae]
  • Coledium, Grant 1965 [Stenoscismatidae]
  • Coleia, Broderip 1835 [Coleiidae]
  • Coleicarpus [Soluta]
  • Coleiconus [Foraminifera]
  • Coleites [Foraminifera]
  • Coleodus [Conodontophorida]
  • Coleoloida, order [Problematica]
  • Coleophyllum, Hall 1883 [Cystiphyllidae]
  • Coleopora [Cheilostomata]
  • Colina, H. Adams and A. Adams 1854 [Cerithiidae]
  • Colinella [Laqueidae]
  • Collapora [Cyclostomata]
  • Collarina [Cribrilinidae]
  • Collarothyris [Athyrididae]
  • Collectoceras, Ruzhencev and Bogoslovskaya 1971 [Cravenoceratidae]
  • Colletosia [Umbonulidae]
  • Colletostracia, Farrell 1992 [Strophomenida]
  • Collibolbina [Palaeocopida]
  • Colliclypeus [Cassiduloida]
  • Collicyrtidium [Nassellaria]
  • Collignonicardia [Cardiida]
  • Collignoniceras, Breistroffer 1947 [Collignoniceratidae]
  • Collinithyris [Sellithyrididae]
  • Collisboris [Podocopida]
  • Collisella, Dall 1871 [Lottiidae]
  • Collonia, Gray 1850 [Ataphridae]
  • Collonista, Iredale 1918 [Turbinidae]
  • Collotia [Reineckeiidae]
  • Collura [Cheilostomata]
  • Collyrites [Collyritidae]
  • Collyrolenus, Hupe 1952 [Ptychopariida]
  • Collyropsis [Disasteridae]
  • Colneptunus, Lorenthey 1929 [Portunidae]
  • Coloceras [Nautilidae]
  • Colombiceras, Spath 1923 [Deshayesitidae]
  • Colomia [Foraminifera]
  • Colomiellia [Calpionellida]
  • Colomita [Foraminifera]
  • Colonammina [Hemisphaeramminidae]
  • Colongina [Spiriferida]
  • Colonograptus [Graptoloidea]
  • Coloradoscaphites [Cephalopoda]
  • Colossaspis, Zhang 1983 [Odontopleurida]
  • Colostracon, Hamlin 1884 [Acteoninidae]
  • Colpentolium [Pterioida]
  • Colpichthys, Hubbs 1918 [Atheriniformes]
  • Colpocoryphe, Novak and Perner 1918 [Calymenidae]
  • Colpodecrinus, Sprinkle and Kolata 1982 [Diplobathrida]
  • Colpophyllia, Milne-Edwards and Haime 1848 [Faviidae]
  • Colposigma, Finlay and Marwick 1937 [Turritellidae]
  • Colpospongia [Lyssacinosa]
  • Colpostomia [Heterostrophia]
  • Colpotiara [Hemicidaroidea]
  • Colubraria, Schumacher 1817 [Buccinidae]
  • Colubrellina, Fischer 1884 [Bursidae]
  • Columactinastraea, Alloiteau 1952 [Actinastreidae]
  • Columastrea, d'Orbigny 1849 [Columastreidae]
  • Columbarium, von Martens 1881 [Turbinellidae]
  • Columbella, Lamarck 1799 [Columbellidae]
  • Columbellisipho [Neogastropoda]
  • Columbellopsis, Bucquoy et al. 1882 [Columbellidae]
  • Columbicrinus, Ulrich 1925 [Crinoidea]
  • Columbitrigonia [Trigoniida]
  • Columbocystis [Paracrinoidea]
  • Columellaespongia [Demospongea]
  • Columellithyris [Zeilleriidae]
  • Columellogyra, Turnsek 1976 [Faviidae]
  • Columenoceras, Barskov 1960 [Geisonoceratidae]
  • Columna [Stromatoporoidea]
  • Columnaphyllia, Geyer 1955 [Axosmiliidae]
  • Columnaria, Goldfuss 1826 [Columnariidae]
  • Columnaxon, Scrutton 1971 [Cyathaxoniidae]
  • Columnocoenia, Alloiteau 1952 [Placocoeniidae]
  • Columnogyra, Beauvais 1976 [Rhipidogyridae]
  • Columnolasma, Pavlova 1973 [Stauriidae]
  • Columnoporella, Sokolov and Tesakov 1963 [Syringophyllidae]
  • Columnostroma, Bogoyavlenskaya 1972 [Syringostromatidae]
  • Columnotheca [Scorioporidae]
  • Colus, Röding 1798 [Buccinidae]
  • Coluzea, Finlay 1926 [Turbinellidae]
  • Colveraia [Radiolitidae]
  • Colwellia [Neogastropoda]
  • Comaliamma [Mayncinidae]
  • Comanchia, Frederickson 1950 [Idahoiidae]
  • Comanthocrinus, Springer 1921 [Monobathrida]
  • Comarmondia [Neogastropoda]
  • Comaroceras [Discosorida]
  • Comarocystites [Comarocystitida]
  • Comarocystitida, order [Paracrinoidea]
  • Comaster, Agassiz 1836 [Comatulida]
  • Comatopoma [Giraldiellidae]
  • Comatulida, order, and Clark 1908 [Crinoidea]
  • Comatulina, Orbigny 1852 [Comatulida]
  • Combinivalvula, Hou 1987 [Bradoriida]
  • Combophyllum, Milne-Edwards and Haime 1850 [Combophyllidae]
  • Cometicercus [Furcacudiformes]
  • Cominella, Gray 1850 [Buccinidae]
  • Cominella (Austrocominella), Ihering 1907 [Buccinidae]
  • Cominista [Neogastropoda]
  • Comiotoechia [Ladogiidae]
  • Comitas, H. Finlay 1926 [Turridae]
  • Comluella, Hupe 1953 [Ellipsocephalidae]
  • Commonozonispira [Archaeogastropoda]
  • Commutatophyllum, Kaplan 1971 [Cyathophyllidae]
  • Commutia, Fedorowski 1973 [Pentaphyllidae]
  • Comograptus [Graptoloidea]
  • Comophyllastraea, Alloiteau 1957 [Montlivaltiidae]
  • Comophyllia, d'Orbigny 1849 [Latomeandridae]
  • Comophylliopsis, Alloiteau 1957 [Latomeandridae]
  • Comoseris, d'Orbigny 1849 [Microsolenidae]
  • Compacoleus [Plumulitidae]
  • Compagicrinus, Jobson and Paul 1979 [Crinoidea]
  • Companteris [Productidae]
  • Complanophyllum [Anthozoa]
  • Complexastraea [Montlivaltiidae]
  • Complexodus [Conodontophorida]
  • Complexophyllum [Anthozoa]
  • Composita, Brown 1849 [Athyrididae]
  • Compositocyathus [Ajacicyathida]
  • Compressidens, Pilsbry and Sharp 1897 [Gadilida]
  • Compressigerina [Foraminifera]
  • Compressiphyllum, Stumm 1949 [Streptelasmatidae]
  • Compressoproductus, Sarytcheva 1960 [Monticuliferidae]
  • Compsaspis [Demospongea]
  • Compsocephalus, Repina 1973 [Dinesidae]
  • Compsocrinus, Wachsmuth and Springer 1885 [Monobathrida]
  • Compsomyax [Cardiida]
  • Comptaluta, Opik 1968 [Archaeocopida]
  • Comptonaspis, Brenzinski 1988 [Proetidae]
  • Comura, Richter 1927 [Acastidae]
  • Comus [Cardiida]
  • Conactaeon, Meek 1863 [Cylindrobullinidae]
  • Conannulofungia [Ajacicyathida]
  • Conarchnium [Nassellaria]
  • Conaspis, Hall 1863 [Dokimocephalidae]
  • Conbathella [Metacopida]
  • Concavatotruncana [Foraminifera]
  • Concavella [Foraminifera]
  • Concavhithis [Palaeocopida]
  • Concavicarida, order, Briggs and Rolfe 1983 [Thylacocephala]
  • Concavicaris [Concavicarida]
  • Concavites [Oppeliidae]
  • Concavodonta, Babin 1972 [Praenuculidae]
  • Concavus, Newman 1982 [Balanidae]
  • Conchicolites, Nicholson 1872 [Cornulitidae]
  • Conchidium, Linnaeus 1768 [Subrianidae]
  • Conchocele [Cardiida]
  • Conchodon [Megalodontidae]
  • Conchodus [Dipteridae]
  • Conchoecia [Myodocopida]
  • Concholepas, Lamarck 1801 [Muricidae]
  • Conchopeltis [Scyphozoa]
  • Conchoprimitella [Palaeocopida]
  • Conchoprimites [Palaeocopida]
  • Conchoprimitia [Palaeocopida]
  • Conchothyra [Neotaenioglossa]
  • Conchyliocarida, order, Secretan 1985 [Thylacocephala]
  • Concinnispira [Archaeogastropoda]
  • Concinnispirifer [Hysterolitidae]
  • Concinnithyris [Gibbithyrididae]
  • Condomyra [Podocopida]
  • Condonella, McLellan 1927 [Euomphalidae]
  • Condonofusiella [Foraminifera]
  • Condracypris [Bairdiocyprididae]
  • Condranema [Vinellidae]
  • Condraoceras, Miller et al. 1947 [Liroceratidae]
  • Condrustella [Foraminifera]
  • Condylacanthus [Astrophorida]
  • Condylocardia, Bernard 1897 [Condylocardiidae]
  • Condylocrinus, Eichwald 1859 [Diplobathrida]
  • Condylocuna, Iredale 1936 [Condylocardiidae]
  • Condylopyge, Hawle and Corda 1847 [Condylopygidae]
  • Conescharellina [Cheilostomata]
  • Confiroma [Nassellaria]
  • Confusastraraea, Gerth 1933 [Haplaraeidae]
  • Confusiscala, de Boury 1909 [Epitoniidae]
  • Conger, Schaeffer 1760 [Congridae]
  • Congorhynchus, Darteville and Casier 1949 [Actinopteri]
  • Congregopora [Stylasterina]
  • Coniatopenia [Pharetronida]
  • Conicarcella [Spirotrichia]
  • Conicorbitolina [Foraminifera]
  • Conicospirillina [Spirillinidae]
  • Coniculospongia [Demospongea]
  • Coniferina [Podocopida]
  • Conilites [Foraminifera]
  • Coninoda [Neotaenioglossa]
  • Coniscala, Boury [Neotaenioglossa]
  • Conisia [Holothuroidea]
  • Conispirifer [Conispiriferidae]
  • Conispongia [Pharetronida]
  • Conitubus [Tuboidea]
  • Conjectura [Archaeogastropoda]
  • Conlinoceras [Acanthoceratidae]
  • Connagnostus, Opik 1967 [Agnostidae]
  • Connectastrea, Koby 1904 [Amphiastreidae]
  • Connectoproductus [Monticuliferidae]
  • Conobelus, Stolley 1919 [Belemnitida]
  • Conocardioida, order, M. Neumayr 1891 [Rostroconchia]
  • Conocaryomma, Lipman 1969 [Conocaryommidae]
  • Conocerina, Ulrich and Foerste 1935 [Ellesmeroceratidae]
  • Conochitina [Rhizopodea]
  • Conococheaquea [Ptychopariida]
  • Conocoelia [Pharetronida]
  • Conocoryphe, Hawle and Corda 1847 [Conocoryphidae]
  • Conocrinus, Orbigny 1850 [Isocrinida]
  • Conocyathus, d'Orbigny 1849 [Turbinoliidae]
  • Conodicoelites [Belemnitida]
  • Conodiscus, Ulrich and Cooper 1936 [Acrothelidae]
  • Conodonta, class, Eichenberg 1930 [Conodontomorpha]
  • Conodontophorida, order, Eichenberg 1930 [Conodonta]
  • Conoglobigerina [Foraminifera]
  • Conoidacmea, Habe 1944 [Patellogastropoda]
  • Conoideocrinus, Klikushin 1987 [Comatulida]
  • Conoides, Howel 1937 [Trilobita]
  • Conoidocyathus [Cribricyathea]
  • Conokephalina, Broegger 1886 [Conokephalinidae]
  • Conolagena [Foraminifera]
  • Conolichas, Dames 1877 [Lichidae]
  • Conometra [Comatulida]
  • Conomimus [Stringocephalidae]
  • Conominolia, Finlay 1926 [Trochidae]
  • Conomitra, Conrad 1865 [Costellariidae]
  • Conopeum, Gray 1848 [Electridae]
  • Conophillipsia, Roberts 1963 [Proetidae]
  • Conophyllia, d'Orbigny 1849 [Procyclolitidae]
  • Conopiscius [Anaspida]
  • Conopolus, Robison 1988 [Ptychopariidae]
  • Conopora [Stylasterina]
  • Conopoterium, Winchell 1865 [Micheliniidae]
  • Conora [Serpulimorpha]
  • Conorbina [Foraminifera]
  • Conorbinella [Foraminifera]
  • Conorbis, Swainson 1840 [Conidae]
  • Conorbitoides [Foraminifera]
  • Conorboides [Foraminifera]
  • Conoredlichia, Chang 1966 [Redlichiida]
  • Conorhytis, Cossmann 1907 [Acmaeidae]
  • Conorotalites [Foraminifera]
  • Conosmilia, Duncan 1865 [Flabellidae]
  • Conosphaera [Spumellaria]
  • Conostichoceras, Foerste 1926 [Nothoceratidae]
  • Conoteuthis [Belemnitida]
  • Conotomaria, Cox 1959 [Pleurotomariidae]
  • Conotreta, Walcott 1889 [Acrotretidae]
  • Conotrochammina, Finlay 1940 [Conotrochamminidae]
  • Conotrochus, Seguenza 1864 [Caryophylliidae]
  • Conotubigera [Cyclostomata]
  • Conradoceras, Foerste 1926 [Hemiphragmoceratidae]
  • Consonopsis [Palaeocopida]
  • Conspicillum [Palaeocopida]
  • Constantina, Cisne 1970 [Proetida]
  • Constellaria [Constellariidae]
  • Constileioceras [Cephalopoda]
  • Contemniscala [Neotaenioglossa]
  • Contignatindocrinus, Arendt 1981 [Cladida]
  • Contocrinus, Knapp 1969 [Graphiocrinidae]
  • Contortella [Neotaenioglossa]
  • Contortophyllum, Strelnikov 1968 [Expressophyllidae]
  • Contracheirurus, Chatterton and Perry 1984 [Cheiruridae]
  • Contractenus, Ljaschenko 1959 [Contractenidae]
  • Contradouvillina [Douvillinidae]
  • Contusotruncana [Foraminifera]
  • Conuber [Neotaenioglossa]
  • Conularia [Conulariidae]
  • Conulariella [Scyphozoa]
  • Conularina [Scyphozoa]
  • Conuloblastus [Spiraculata]
  • Conus (Conus), Linnaeus 1758 [Conidae]
  • Convexicaris [Conchyliocarida]
  • Convexopecten [Pectinidae]
  • Convexothyris [Harpotothyrididae]
  • Convoluticeras, Erben 1960 [Teicherticeratidae]
  • Cookia [Archaeogastropoda]
  • Cookobryozoon [Ctenostomata]
  • Coolinia, B. B. Bancroft 1949 [Chilidiopsidae]
  • Coollarocrinus [Cyrtocrinida]
  • Cooperatia [Metacopida]
  • Cooperella, Carpenter 1864 [Cardiida]
  • Cooperellopsis [Cardiida]
  • Cooperidiscus, Bassler 1935 [Agelacrinitidae]
  • Cooperina [Cooperinidae]
  • Cooperispira [Neoretziidae]
  • Cooperrhynchia [Dimerellidae]
  • Cooperuna [Acratiidae]
  • Coosella, Lochman 1936 [Crepicephalidae]
  • Coosia, Walcott 1911 [Crepicephalidae]
  • Coosina, Rasetti 1956 [Crepicephalidae]
  • Coosinoides, Ivshin 1962 [Crepicephalidae]
  • Copanognathus, Hussakof and Bryant 1920 [Arthrodira]
  • Copelandella [Palaeocopida]
  • Copelandia [Palaeocopida]
  • Cophocara [Neogastropoda]
  • Copia, Vasilyuk and Kozyreva 1974 [Aulophyllidae]
  • Copicyntra, Nazarov and Ormiston 1985 [Entactiniidae]
  • Copicyntroides, Nazarov and Ormiston 1985 [Relindellidae]
  • Copidozoum, Harmer 1926 [Calloporidae]
  • Copiellintra, Nazarov and Ormiston 1985 [Archaeospongoprunidae]
  • Copleicyathus [Archaeocyathida]
  • Copodontiformes, order, Obruchev 1953 [Chondrichthyes]
  • Copodus, Morris and Roberts 1862 [Copodontidae]
  • Coprinoscolex [Echiura]
  • Coprolithina [Foraminifera]
  • Coptocampylodon [Gorgonacea]
  • Coptochetus [Neogastropoda]
  • Coptodiscus [Holectypidae]
  • Coptosipho [Neogastropoda]
  • Coptostoma, Cossmann 1899 [Cancellariidae]
  • Coptostomella [Neogastropoda]
  • Coptothyris, Jackson 1918 [Terebrataliidae]
  • Copytus, Skogsberg 1939 [Neocytherideidae]
  • Coquandia [Myoida]
  • Coquimba [Podocopida]
  • Corallidium [Demospongea]
  • Corallidomus, Whitfield 1895 [Modiomorphidae]
  • Coralliochama [Plagioptychidae]
  • Coralliophaga, Blainville 1824 [Trapezidae]
  • Coralliophila, Adams and Adams 1853 [Muricidae]
  • Corallistes [Demospongea]
  • Corallium, Marsigli 1766 [Gorgonacea]
  • Coralloceras [Orthocerida]
  • Corallospondylus [Pterioida]
  • Coraster [Holasteroida]
  • Corbariastraea, Alloiteau 1952 [Thamnasteriidae]
  • Corbicellopsis, Cox 1929 [Tancrediidae]
  • Corbicula, Megerle 1811 [Corbiculidae]
  • Corbicularia [Anopliidae]
  • Corbiculella [Cardiida]
  • Corbiculopsis [Cardiida]
  • Corbina [Ptychopariida]
  • Corbula, Bruguire 1789 [Corbulidae]
  • Corbula (Hexacorbula), Olsson 1932 [Corbulidae]
  • Corbula (Tenuicorbula), Olsson 1932 [Corbulidae]
  • Corbulamella, Meek 1857 [Corbulidae]
  • Corbulipora [Cheilostomata]
  • Corbuloceras [Oncocerida]
  • Corbulomima, H. E. Vokes 1945 [Corbulidae]
  • Corburella [Cardiida]
  • Corcorania [Arthropoda]
  • Cordania, Clarke 1892 [Brachymetopidae]
  • Cordapeltis, Pribyl and Vanek 1971 [Phacopida]
  • Cordatella [Foraminifera]
  • Cordatomyonia [Proschizophoriidae]
  • Cordiceramus, Heinz 1932 [Inoceramidae]
  • Cordieria, Rouault 1848 [Turridae]
  • Cordilleracyathus, R.C. Handfield 1971 [Ajacicyathida]
  • Cordiopsis [Veneridae]
  • Cordispira [Archaeogastropoda]
  • Cordiula, Meyer 1887 [Mactromyidae]
  • Cordobicyathus [Ajacicyathida]
  • Cordubiceras [Cephalopoda]
  • Cordyloblastus, R. O. Fay 1961 [Spiraculata]
  • Cordylocrinus, Angelin 1878 [Monobathrida]
  • Cordylodus [Conodontophorida]
  • Coreanocephalus, Kobayashi 1935 [Ptychaspididae]
  • Coreanoceras, Kobayashi 1931 [Manchuroceratidae]
  • Corechinus [Holasteroida]
  • Corellicarcinus [Decapoda]
  • Coremagraptus [Dendroidea]
  • Corematocrinus, Goldring 1923 [Cladida]
  • Coreocaris [Thylacocephala]
  • Coriandria [Neotaenioglossa]
  • Corineorthis [Plectorthidae]
  • Coriops, R. Estes 1969 [Albulidae]
  • Coriothyris [Aulacothyropsidae]
  • Coripia [Cardiida]
  • Cornellites, Williams 1908 [Pterineidae]
  • Corniculina, Klishevich 1967 [Procorniculinidae]
  • Corniculinoides, Alberti 1986 [Procorniculinidae]
  • Cornicythereis [Podocopida]
  • Cornigella, Warthin 1930 [Drepanellidae]
  • Cornikloedenia, Henningsmoen 1954 [Beyrichiidae]
  • Cornovica, Whittard 1960 [Trilobita]
  • Cornuboniscus, White 1939 [Palaeonisciformes]
  • Cornucardia, Koken 1913 [Dicerocardiidae]
  • Cornucoquimba [Podocopida]
  • Cornuella [Orthocerida]
  • Cornulina, Conrad 1853 [Melongenidae]
  • Cornulitella, Howell 1952 [Cornulitidae]
  • Cornulites, Schlotheim 1820 [Cornulitidae]
  • Cornulitidae, family, Fischer 1962 [Cornulitida]
  • Cornuloculina [Ophthalmidiidae]
  • Cornuodus [Conodontophorida]
  • Cornuproetus, Richter and Richter 1919 [Tropidocoryphidae]
  • Cornuscutellum, Snajdr 1960 [Styginidae]
  • Cornuspira, Schultze 1854 [Cornuspiridae]
  • Cornuta, order, Jaekel 1901 [Stylophora]
  • Cornutella, Ehrenberg 1838 [Acropyramididae]
  • Cornuticella [Cheilostomata]
  • Cornutobairdia [Bairdiidae]
  • Cornutoentolium [Pterioida]
  • Cornutovum, Foreman 1968 [Cannobotryidae]
  • Cornwallia, Wilson 1932 [Brachiopoda]
  • Corocalyptra [Nassellaria]
  • Corocrinus, Goldring 1923 [Monobathrida]
  • Coronalosia [Strophalosiidae]
  • Coronata, order, O. Jaekel 1918 [Blastoidea]
  • Coronatica [Neotaenioglossa]
  • Coronatida, order [Scyphozoa]
  • Corongoceras [Himalayitidae]
  • Coronia [Turridae]
  • Coroniceras [Arietitidae]
  • Coronidmonea [Cyclostomata]
  • Coroniopsis [Turridae]
  • Coronipora [Involutinidae]
  • Coroniscala [Neotaenioglossa]
  • Coronites [Pulchelliidae]
  • Coronocephalus, Grabau 1924 [Encrinuridae]
  • Coronochitina [Rhizopodea]
  • Coronocrinus, Hall 1858 [Crinoidea]
  • Coronocystis [Rhombifera]
  • Coronodus, Bryant 1935 [Coronodontidae]
  • Coronograptus [Graptoloidea]
  • Coronula, Bruguière 1792 [Coronulidae]
  • Coronura, Hall and Clarke 1888 [Dalmanitidae]
  • Corophiidae, family [Amphipoda]
  • Corosaurus, Case 1936 [Eosauropterygia]
  • Corphalia, Poty 1975 [Lithostrotionidae]
  • Corralio [Demospongea]
  • Corrigotubella [Foraminifera]
  • Corrosina [Foraminifera]
  • Corrugatagnostus, Kobayashi 1939 [Metagnostidae]
  • Corrugatella [Foraminifera]
  • Corrugatimediorostrum [Rhynchonellida]
  • Corrugopora, Stearn 1956 [Theciidae]
  • Corsania, Vidal 1917 [Neritidae]
  • Cortezorthis, Johnson and Talent 1967 [Dalmanellidae]
  • Corthya [Disasteridae]
  • Corticium [Astrophorida]
  • Cortina, Haeckel 1887 [Stephaniidae]
  • Cortinella, Bandel 1988 [Cortinellidae]
  • Cortinia [Pholadomyida]
  • Cortiniscus [Nassellaria]
  • Corum, Blome 1984 [Pseudodictyomitridae]
  • Corumbella [Scyphozoa]
  • Corunegenys, Wade 1942 [Semionotiformes]
  • Corvaspis, Woodward 1934 [Corvaspididae]
  • Corveolepis [Pteraspidomorphes]
  • Corvinopugnax [Innaechiidae]
  • Corwenia, Smith and Ryder 1926 [Aulophyllidae]
  • Corycephalus, Hall and Clarke 1888 [Phacopida]
  • Coryellites [Metacopida]
  • Corylispirifer [Reticulariidae]
  • Corylocrinus [Rhombifera]
  • Corymbopora [Cyclostomata]
  • Corymboporella [Cheilostomata]
  • Corymbospongia, Rigby and Potter 1986 [Colospongiidae]
  • Corynecrinus, Kirk 1934 [Cladida]
  • Corynella [Endostomatidae]
  • Corynexochida, order, T. Kobayashi 1935 [Trilobita]
  • Corynexochides, Rasetti 1948 [Dolichometopidae]
  • Corynexochina, Lermontova 1940 [Corynexochidae]
  • Corynexochus, Angelin 1854 [Corynexochidae]
  • Corynites [Graptoloidea]
  • Corynoides, Nicholson 1867 [Graptoloidea]
  • Corynostylus [Cheilostomata]
  • Corynotrypa [Cyclostomata]
  • Coryphaenoides, Gunnerus 1765 [Macrouridae]
  • Coryphaenopsis, Fric and Bayer 1902 [Elopiformes]
  • Coryphopterus, Gill 1863 [Perciformes]
  • Coryphostoma, Cushman 1936 [Rotaliina]
  • Coryphyllia, Cuif 1974 [Reimaniphylliidae]
  • Coryslus [Holasteroida]
  • Corysoceras [Oncocerida]
  • Coryssochiton, M. D. Debrock et al. 1984 [Lepidopleuridae]
  • Coryssognathus [Conodontophorida]
  • Corythocrinus, Kirk 1946 [Cladida]
  • Corythoecia, Foreman 1963 [Corythoecidae]
  • Cosa, Finlay 1926 [Philobryidae]
  • Coscinaraea, Milne-Edwards and Haime 1848 [Siderastreidae]
  • Coscinaulus, Schrammen 1937 [Callodictyonidae]
  • Coscinella, Hall and Simpson 1887 [Stictoporellidae]
  • Cosciniopsis [Cheilostomata]
  • Coscinocyathella [Capsulocyathida]
  • Coscinocyathellus [Capsulocyathida]
  • Coscinocyathus, J.G. Bornemann 1884 [Capsulocyathida]
  • Coscinodiscus, Schrammen 1937 [Cylindrophymatidae]
  • Coscinodus [Pteraspidomorphi]
  • Coscinoecia [Cyclostomata]
  • Coscinophragma [Coscinophragmatidae]
  • Coscinopleura [Coscinopleuridae]
  • Coscinopora, Goldfuss 1826 [Ventriculitidae]
  • Coscinoptycta [Ajacicyathida]
  • Coscinospira [Peneroplidae]
  • Coscinospongia [Demospongea]
  • Coscinotrypa [Hexagonellidae]
  • Cosjuvia [Anthozoa]
  • Coskinolina [Foraminifera]
  • Coskinolinoides [Foraminifera]
  • Coskinon [Foraminifera]
  • Cosmacanthus, Agassiz 1845 [Arthrodira]
  • Cosmasyrinx, Marwick 1931 [Turridae]
  • Cosmetalepas, Iredale 1924 [Fissurellidae]
  • Cosmetocrinus, Kirk 1941 [Aphelecrinidae]
  • Cosmiolithus, Lindström 1899 [Stelliporellidae]
  • Cosmocrinus, Jaeckel 1898 [Botryocrinidae]
  • Cosmogoniophora (McLearn 1918) [Modiomorphidae]
  • Cosmolithes [Neogastropoda]
  • Cosmomya [Sanguinolitidae]
  • Cosmophiline, Berger 1949 [Cephalaspida]
  • Cosmoptychius, Traquair 1877 [Palaeonisciformes]
  • Cossmannea, Pcelincev 1931 [Nerineidae]
  • Cossmannella [Cardiida]
  • Cossmannia, Newton 1891 [Rissoidae]
  • Cossmannica [Pyramidellidae]
  • Costa [Podocopida]
  • Costacallista, Palmer 1926 [Veneridae]
  • Costaclymenia, Schindewolf 1920 [Costaclymeniidae]
  • Costacranaena [Cranaenidae]
  • Costaegera [Palaeocopida]
  • Costaella [Heterostrophia]
  • Costagyra, Vialov 1936 [Gryphaeidae]
  • Costaledopsis [Nuculida]
  • Costalocrinus, Jaekel 1918 [Botryocrinidae]
  • Costanoplia, Xu 1977 [Spiriferida]
  • Costatia [Metacopida]
  • Costatoleda [Nuculida]
  • Costatoria [Myophoriidae]
  • Costatrypa [Atrypidae]
  • Costatumulus, Waterhouse 1983 [Monticuliferidae]
  • Costaveenia [Podocopida]
  • Costayella [Foraminifera]
  • Costazia [Cheilostomata]
  • Costeina [Pterioida]
  • Costellacesta, Kauffman 1964 [Limidae]
  • Costellagerina [Foraminifera]
  • Costellamussiopecten [Pectinidae]
  • Costellipitar, Habe 1951 [Veneridae]
  • Costellirostra [Eatoniidae]
  • Costellispirifer [Hysterolitidae]
  • Costentolium [Pterioida]
  • Costicamptonectes [Pectinidae]
  • Costidiscus, Uhlig 1883 [Macroscaphitidae]
  • Costifera [Nubeculariidae]
  • Costiferina [Productidae]
  • Costigervillia, Cox 1948 [Grallatoridae]
  • Costileioceras [Graphoceratidae]
  • Costimitoceras, Vöhringer 1960 [Gattendorfiidae]
  • Costisorthis [Dalmanellidae]
  • Costispinifera [Productellidae]
  • Costispirifer, Copper 1942 [Acrospiriferidae]
  • Costistricklandia [Stricklandiidae]
  • Costistrophomena, Sheehan 1987 [Strophomenidae]
  • Costistrophonella [Strophonellidae]
  • Costitrimerella, Ron and L 1993 [Trimerellidae]
  • Costoconcha [Gillediidae]
  • Costocyrena [Neomiodontidae]
  • Costokidderia, Finlay 1927 [Gaimardiidae]
  • Costokloedenia [Palaeocopida]
  • Costonia, Whittard 1956 [Trilobita]
  • Costosyrnola [Heterostrophia]
  • Costula [Cheilostomata]
  • Costulatostyliolina, Lardeux 1969 [Striatostyliolinidae]
  • Cotalagnostus, Whitehouse 1936 [Spinagnostidae]
  • Cothonion [Anthozoa]
  • Cothurnicella [Cheilostomata]
  • Cothurnocystis [Cornuta]
  • Cothurnocystisbifida [Cornuta]
  • Cotonopsis, Olsson 1942 [Columbellidae]
  • Cottaldia [Arbaciidae]
  • Cotteaudia [Phymosomatoida]
  • Cotteroceras, Ulrich and Foerste 1936 [Proterocameroceratidae]
  • Cottonia, Iredale 1934 [Volutidae]
  • Cottopsis, Girard 1850 [Perciformes]
  • Cottreaucorys [Spatangoida]
  • Cottreauites [Cephalopoda]
  • Cotylederma, Quenstedt 1852 [Cyrtocrinida]
  • Cotyliscus [Porifera]
  • Couloniceras [Cephalopoda]
  • Couloumania, Thoral 1946 [Conocoryphidae]
  • Coupatezia, H. Cappetta 1982 [Myliobatiformes]
  • Courtessolium, Pribyl and Vanek 1985 [Phacopida]
  • Couthouyia, Adams 1860 [Planaxidae]
  • Covracythere, Gramm 1975 [Bythocytheridae]
  • Cowlitzia [Neotaenioglossa]
  • Cowtoniceras [Cephalopoda]
  • Coxesia [Mytilida]
  • Coxiella [Spirotrichia]
  • Coxites [Foraminifera]
  • Coxliellina [Spirotrichia]
  • Cradeocrinus, Goldring 1923 [Cladida]
  • Craftonoceras [Tarphycerida]
  • Craginia, Stephenson 1952 [Turritellidae]
  • Craigella [Triplesiidae]
  • Craigheadia, Hupe 1955 [Ptychopariida]
  • Cranaena, J. Hall and J. Clarke 1893 [Cranaenidae]
  • Crangopsis, Salter 1863 [Aeschronectida]
  • Crania, Retzius 1781 [Craniidae]
  • Craniella [Astrophorida]
  • Craniida, order, Waagen 1885 [Craniata]
  • Craniops, Hall 1859 [Craniopsidae]
  • Craniopsida, order, Gorjansky and Popov 1985 [Craniata]
  • Craniotreta, Termier and Monod 1978 [Acrotretida]
  • Craniscus, Dall 1871 [Craniidae]
  • Cranocephalites [Cadoceratidae]
  • Cranoceras [Nautilida]
  • Cranocrinus, Wanner 1929 [Cladida]
  • Cranodus, Trautschold 1879 [Chondrichthyes]
  • Cranosina [Cheilostomata]
  • Craspedarges, Guerich 1901 [Lichida]
  • Craspedelia [Bimuriidae]
  • Craspedites [Cephalopoda]
  • Craspedobolbina [Palaeocopida]
  • Craspedochiton, Shuttleworth 1853 [Acanthochitonidae]
  • Craspedocrinus, Dahmer 1922 [Crinoidea]
  • Craspedodiscus [Cephalopoda]
  • Craspedographylus [Podocopida]
  • Craspedopora [Electridae]
  • Craspedoporina [Cheilostomata]
  • Craspedops, Raasch 1939 [Aglaspididae]
  • Craspedopyxion [Ostracoda]
  • Crassacythere [Podocopida]
  • Crassadoma, Bernard 1986 [Pectinidae]
  • Crassaluna [Cystoporata]
  • Crassatella, Lamarck 1799 [Crassatellidae]
  • Crassatellina, Meek 1871 [Astartidae]
  • Crassatellites, Krueger 1823 [Crassatellidae]
  • Crassatellopsis, Beushausen 1895 [Astartidae]
  • Crassatina, Kobelt 1881 [Crassatellidae]
  • Crassatrypa [Karpinskiidae]
  • Crassialveolites, Sokolov 1955 [Alveolitidae]
  • Crassiatractites [Aulacocerida]
  • Crassicellepora [Calloporidae]
  • Crassiceras [Phymatoceratidae]
  • Crassicollaria [Calpionellida]
  • Crassiconcha [Pholadomyida]
  • Crassicoscinus [Ajacicyathida]
  • Crassicyclus [Anthozoa]
  • Crassifimbra, Lochman 1947 [Antagmidae]
  • Crassilabrum, Jousseaume 1880 [Muricidae]
  • Crassilasma, Ivanovskiy 1962 [Streptelasmatidae]
  • Crassilina, Ljaschenko 1955 [Crassilinidae]
  • Crassimarginatella, Canu 1900 [Calloporidae]
  • Crassimurex [Neogastropoda]
  • Crassinella, Guppy 1874 [Crassatellidae]
  • Crassiplanulites [Cephalopoda]
  • Crassiproetus, Stumm 1953 [Proetidae]
  • Crassipunctatrypa [Punctatrypidae]
  • Crassiscala [Neotaenioglossa]
  • Crassispira, Swainson 1840 [Turridae]
  • Crassispirella [Turridae]
  • Crassistella, Roniewicz 1989 [Pamiroseriidae]
  • Crassodiscopora [Cyclostomata]
  • Crassohornera [Cyclostomata]
  • Crassophrentis [Anthozoa]
  • Crassopleura, Monterosato 1884 [Turridae]
  • Crassostrea, Sacco 1897 [Ostreidae]
  • Crassotornoceras, House and Price 1985 [Tornoceratidae]
  • Crassumbo [Crassumbidae]
  • Crataegocrinus, Manni and Nicosia 1985 [Cyrtocrinida]
  • Crateniophyllum [Anthozoa]
  • Craterellina [Metacopida]
  • Crateroceras, Foerste and Savage 1927 [Acleistoceratidae]
  • Craterocrinus, Goldring 1923 [Monobathrida]
  • Crateromorpha [Lyssacinosida]
  • Craterophyllum, Foerste 1909 [Arachnophyllidae]
  • Crateropora [Cheilostomata]
  • Crateroseris, Tomes 1883 [Synastraeidae]
  • Craticularia, Zittel 1877 [Craticulariidae]
  • Cratis, Hedley 1915 [Philobryidae]
  • Cratochelone, Longman 1915 [Protostegidae]
  • Cratorhynchonella [Hebetoechiidae]
  • Cratoselache, Woodward 1924 [Ctenacanthidae]
  • Cratospirifer, Tong 1986 [Spiriferida]
  • Cravenia, Hudson 1928 [Verbeekiellidae]
  • Cravenites [Goniatitida]
  • Cravenoceras, W. S. Bisat 1928 [Cravenoceratidae]
  • Cravenoceratoides, R. G. S. Hudson 1941 [Cravenoceratidae]
  • Crawfordina [Neogastropoda]
  • Crebriscala [Neotaenioglossa]
  • Cremacrinus, Ulrich 1886 [Crinoidea]
  • Cremastoglottos, Whittard 1961 [Asaphida]
  • Cremnoceramus, Heinz 1932 [Inoceramidae]
  • Cremnorthis, Williams 1963 [Cremnorthidae]
  • Crenabolina [Palaeocopida]
  • Crenaleya [Podocopida]
  • Crenamussium [Pterioida]
  • Crenatella [Hauerinidae]
  • Crenatolorica [Neoloricata]
  • Crenatula, Lamarck 1803 [Malleidae]
  • Crenaturricula [Neogastropoda]
  • Crenaverneuilina [Foraminifera]
  • Crenella, Brown 1827 [Mytilidae]
  • Crenetocerithium [Neotaenioglossa]
  • Creniceras [Oppeliidae]
  • Crenidens, Cuvier and Valenciennes 1830 [Perciformes]
  • Crenidens, Cuvier and Valenciennes 1830 [Perciformes]
  • Crenilabium, Cossmann 1889 [Acteonidae]
  • Crenipecten [Aviculopectinidae]
  • Crenisutura [Neogastropoda]
  • Creniturbo [Archaeogastropoda]
  • Crenolepis, Carus 1888 [Perleidiformes]
  • Crenomytilus, Soot-Ryen 1955 [Mytilidae]
  • Crenostrea, Marwick 1931 [Gryphaeidae]
  • Crenotrapezium [Neomiodontidae]
  • Crenulazone [Archaeogastropoda]
  • Crenulilimopsis, Kuroda and Habe 1971 [Limopsidae]
  • Crenulipora, Le Maître 1956 [Favositidae]
  • Crenulostomina [Miliolidae]
  • Creonella, B. Wade 1917 [Pyramidellidae]
  • Crepicephalina, Resser and Endo 1935 [Crepicephalidae]
  • Crepicephalus, Owen 1852 [Crepicephalidae]
  • Crepichilella, Wilson 1951 [Ptychopariida]
  • Crepidacantha [Cheilostomata]
  • Crepidophyllia [Anthozoa]
  • Crepidula, Lamarck 1799 [Calyptraeidae]
  • Crepipatella, Lesson 1830 [Calyptraeidae]
  • Crepipora [Cystoporata]
  • Crepis [Cheilostomata]
  • Crepispisula, Eames 1957 [Mactridae]
  • Crescenticythere [Ostracoda]
  • Crescentilla [Palaeocopida]
  • Crescis [Cyclostomata]
  • Creseis, Rang 1828 [Cavoliniidae]
  • Crespinella [Foraminifera]
  • Crespinina [Foraminifera]
  • Crestjahitus, Syssoiev 1968 [Crestjahitidae]
  • Crestoconus [Mollusca]
  • Cretaceomurex [Neogastropoda]
  • Cretaceratina [Podocopida]
  • Cretachlorodus [Decapoda]
  • Cretascymnus, Cappetta 1980 [Squaliformes]
  • Cretatriacanthus, Tyler and Sorbini 1996 [Tetraodontiformes]
  • Cretiscalpellum, Withers 1922 [Calanticidae]
  • Cretitanais [Tanaidacea]
  • Cretocardia [Cardiida]
  • Cretodus, Sokolov 1965 [Cretoxyrhinidae]
  • Cretolamna, Glikman 1958 [Cretoxyrhinidae]
  • Cretoxyrhina, Glikman 1958 [Cretoxyrhinidae]
  • Creusia, Leach 1817 [Balanidae]
  • Cribanocrinus [Rhodocrinitidae]
  • Cribella [Cheilostomata]
  • Cribellopora [Lacernidae]
  • Cribellopsis [Foraminifera]
  • Cribranopsis [Foraminifera]
  • Cribraria, Jousseaume 1884 [Cypraeidae]
  • Cribratina [Cribratinidae]
  • Cribrendoecium [Cribrilinidae]
  • Cribricyathea, class [Problematica]
  • Cribricyathus [Cribricyathea]
  • Cribrilaria [Cribrilinidae]
  • Cribrilina [Cribrilinidae]
  • Cribroaperturata [Foraminifera]
  • Cribroblastus, G. Hambach 1903 [Spiraculata]
  • Cribroconcha [Healdiidae]
  • Cribroelphidium, Cushman and Bronnimann 1948 [Elphidiidae]
  • Cribrogenerina [Palaeotextulariidae]
  • Cribrogloborotalia [Foraminifera]
  • Cribrogoesella [Foraminifera]
  • Cribrohantkenina [Foraminifera]
  • Cribrohemisphaeroides [Foraminifera]
  • Cribrolenticulina [Foraminifera]
  • Cribrolinoides [Spiroloculinidae]
  • Cribronodosaria [Nodosariidae]
  • Cribrononion [Nonionidae]
  • Cribroparrella [Foraminifera]
  • Cribropleurostomella [Foraminifera]
  • Cribropullenia [Foraminifera]
  • Cribrorobulina [Foraminifera]
  • Cribrorotalia [Foraminifera]
  • Cribrosphaeroides [Parathuramminidae]
  • Cribrospira [Foraminifera]
  • Cribrospongia, d'Orbigny 1849 [Cribrospongiidae]
  • Cribrostomoides [Lituolidae]
  • Cribroturretoides [Foraminifera]
  • Crickites, Wedekind 1913 [Gephuroceratidae]
  • Cricocosmia [Cricocosmiidae]
  • Cricocrinus, Strimple and Watkins 1969 [Cladida]
  • Cricocyathus, Quenstedt 1881 [Faviidae]
  • Cricodictyum [Rhinidictyidae]
  • Cricosaurus, A. Wagner 1858 [Metriorhynchidae]
  • Cricosia [Cancellothyrididae]
  • Crimella [Heterostrophia]
  • Crimites, Toumansky 1937 [Adrianitidae]
  • Crinerocrinus, Kolata 1982 [Diplobathrida]
  • Crininicaminus [Terebellomorpha]
  • Crinisaria [Spiriferida]
  • Crinisarina [Athyrididae]
  • Crinistrophia [Douvillinidae]
  • Crinitograptus [Graptoloidea]
  • Crinobrachiatus, Moore 1962 [Crinoidea]
  • Crinocaulis [Graptolithina]
  • Crinoidea, class, J. S. Miller 1821 [Echinodermata]
  • Criocardium, Conrad 1870 [Cardiidae]
  • Crioceras, d'Orbigny 1842 [Crioceratitidae]
  • Crioceratites, Leveillé 1837 [Crioceratitidae]
  • Crioceratites (Menuthiocrioceras), Collignon 1949 [Crioceratitidae]
  • Criotypus, Opik 1979 [Ptychagnostidae]
  • Crisia [Cyclostomata]
  • Crisidia [Cyclostomata]
  • Crisidmonea [Cyclostomata]
  • Crisiella [Cyclostomata]
  • Crisina [Idmoneidae]
  • Crisinella [Cyclostomata]
  • Crisiona [Cyclostomata]
  • Crisisina [Cyclostomata]
  • Crispispongia [Stellispongiidae]
  • Crispus [Cribricyathea]
  • Crista, Tsyganko 1971 [Fasciphyllidae]
  • Cristaeleberis [Podocopida]
  • Cristafrons, R. Feldmann et al. 1993 [Palaeocorystidae]
  • Cristagnostus, Rushton 1978 [Agnostida]
  • Cristalloella [Tofanellidae]
  • Cristatodus [Problematica]
  • Cristellariopsis [Foraminifera]
  • Cristicoma, Popov 1980 [Torynelasmatidae]
  • Cristigerina, Lerich 1905 [Perciformes]
  • Cristipluma, Bishop 1983 [Retroplumidae]
  • Cristodus [Conodontophorida]
  • Crisulipora [Cyclostomata]
  • Crocodilaemus, Jourdan 1857 [Pholidosauridae]
  • Croixana, Nelson 1951 [Parabolinoididae]
  • Crolanium, Pessagno 1977 [Xitidae]
  • Cromatrypa [Lissatrypidae]
  • Crommium, Cossmann 1888 [Naticidae]
  • Crommium (Euspirocrommium), Sacco 1890 [Ampullinidae]
  • Cromus, Barrande 1852 [Encrinuridae]
  • Cromyocrinus, Trautschold 1867 [Cladida]
  • Cromyodruppa, Haeckel 1887 [Litheliidae]
  • Cromyodruppocarpus [Spumellaria]
  • Cromyomma, Haeckel 1862 [Actinommidae]
  • Cromyostaurolonche [Spumellaria]
  • Croneisella [Saccamminidae]
  • Cronia, H. Adams and A. A 1853 [Thaididae]
  • Cronyphyllum, Ulitina 1975 [Kodonophyllidae]
  • Crossacanthia [Productellidae]
  • Crossata, Jousseaume 1881 [Bursidae]
  • Crossbitheca [Circothecida]
  • Crossea [Archaeogastropoda]
  • Crosseola [Archaeogastropoda]
  • Crossiskenidium [Skenidiidae]
  • Crossognathiformes, order, Taverne 1989 [Actinopteri]
  • Crossognathus [Crossognathiformes]
  • Crossostoma, Morris and Lycett 1851 [Ataphridae]
  • Crossotrema [Neotaenioglossa]
  • Crossoura, Moberg and Segerberg 1906 [Trilobita]
  • Crotalocephalides, Alberti 1967 [Phacopida]
  • Crotalocephalina, Pibyl and Vanek 1964 [Cheiruridae]
  • Crotalocephalus, Salter 1853 [Cheiruridae]
  • Crotalocrinites, Austin 1842 [Cladida]
  • Crownopora [Cryptostomata]
  • Crozonaspis, Henry 1968 [Dalmanitidae]
  • Crozonorthis [Platyorthidae]
  • Cruasiceras [Cephalopoda]
  • Crucella, Pessagno 1971 [Hagiastridae]
  • Crucibrissus [Hemiasteridae]
  • Crucibulum, Schumacher 1817 [Calyptraeidae]
  • Crucicephalus, Shergold 1971 [Trilobita]
  • Crucicornina [Podocopida]
  • Cruciella [Bivalvia]
  • Crucilobiceras [Eoderoceratidae]
  • Cruciloculina [Hauerinidae]
  • Crucimedusina [Hydroida]
  • Crucispongia [Hexactinellida]
  • Crucivirga [Holothuroidea]
  • Crumillospongia, Rigby 1986 [Hazeliidae]
  • Cruralina [Cancellothyrididae]
  • Cruratula [Dielasmatidae]
  • Crurirhynchia, Dagys 1961 [Erymnariidae]
  • Crusoia [Ptychopariida]
  • Crussoliceras [Cephalopoda]
  • Crustoidea, order, Bulman 1970 [Graptolithina]
  • Crustopora [Trepostomida]
  • Crustuloides [Cardiida]
  • Cruziturricula, Marks 1951 [Turridae]
  • Cryphaeoides, Delo 1935 [Calmoniidae]
  • Cryphina, Oehlert 1889 [Phacopida]
  • Cryphiocrinus, Kirk 1929 [Cladida]
  • Cryphops, R. Richter and E. Richter 1926 [Phacopidae]
  • Cryptacanthia [Notothyrididae]
  • Cryptamphorella, Dumitrica 1970 [Williriedellidae]
  • Cryptangia, Milne-Edwards and Haime 1848 [Rhizangiidae]
  • Cryptanisocrinus [Sagenocrinida]
  • Cryptatrypa [Glassiidae]
  • Cryptaulax [Cryptaulacidae]
  • Cryptaulia [Hippuritida]
  • Cryptechinus [Temnopleuroida]
  • Cryptobalistes [Tetraodontiformes]
  • Cryptoberyx, Gaudant 1978 [Beryciformes]
  • Cryptoblastus, R. Etherridge and P. H. Carpender 1886 [Spiraculata]
  • Cryptoborsonia [Neogastropoda]
  • Cryptobranchia [Archaeogastropoda]
  • Cryptocapsa [Nassellaria]
  • Cryptocardia, Palmer 1974 [Cardiidae]
  • Cryptocaris, Barrande 1872 [Orthothecidae]
  • Cryptocephalus [Nassellaria]
  • Cryptochiton, Middendorff 1847 [Acanthochitonidae]
  • Cryptochorda, Mörch 1858 [Harpidae]
  • Cryptoclymenia [Goniatitida]
  • Cryptocoelia, Steinmann 1882 [Cryptocoeliidae]
  • Cryptocoelopis [Cardiida]
  • Cryptocoenia, d'Orbigny 1849 [Stylinidae]
  • Cryptoconchus, Burrow 1815 [Acanthochitonidae]
  • Cryptoconus, Koenen 1867 [Conidae]
  • Cryptocordieria [Neogastropoda]
  • Cryptocrinites, von Buch 1840 [Cryptocrinitidae]
  • Cryptocycloceras [Orthocerida]
  • Cryptoderaspis, Rasetti 1946 [Catillicephalidae]
  • Cryptodictya [Reticulosa]
  • Cryptoglena [Cyclostomata]
  • Cryptoglytopleura [Palaeocopida]
  • Cryptogoleus [Isorophida]
  • Cryptograptus [Graptoloidea]
  • Cryptolarancium [Spumellaria]
  • Cryptolepas, Dall 1872 [Coronulidae]
  • Cryptolepis [Coelacanthiformes]
  • Cryptolichenaria, Sokolov 1955 [Cryptolichenariidae]
  • Cryptolithoides, Whittington 1941 [Trinucleidae]
  • Cryptolithus, Green 1832 [Trinucleidae]
  • Cryptomactra, Andrussov 1902 [Mactridae]
  • Cryptomella [Neogastropoda]
  • Cryptomya, Conrad 1848 [Myidae]
  • Cryptonatica, Dall 1892 [Naticidae]
  • Cryptonella [Cryptonellidae]
  • Cryptonerita [Archaeogastropoda]
  • Cryptopecten, Dall et al. 1938 [Pectinidae]
  • Cryptophragmus, Raymond 1914 [Aulaceratidae]
  • Cryptophyllus [Palaeocopida]
  • Cryptoplax, Blainville 1818 [Acanthochitonidae]
  • Cryptoplocus [Heterostrophia]
  • Cryptopora [Nassellaria]
  • Cryptopora, Jeffreys 1869 [Cryptoporidae]
  • Cryptoporella [Cryptoporidae]
  • Cryptoptyxis [Neotaenioglossa]
  • Cryptorhytis, Meek 1876 [Fasciolariidae]
  • Cryptorthoceras, Flower 1939 [Spyroceratidae]
  • Cryptoschisma, R. Etheridge and P. H. Carpenter 1886 [Fissiculata]
  • Cryptoseptida [Ichthyolariidae]
  • Cryptosiphon [Terebellomorpha]
  • Cryptospira [Marginellidae]
  • Cryptospirifer, Grabau 1931 [Athyrididae]
  • Cryptostephanidium, Dumitrica 1978 [Eptingiidae]
  • Cryptostomata, order [Stenolaemata]
  • Cryptostomella [Lepraliellidae]
  • Cryptosula [Cryptosulidae]
  • Cryptotaxis [Conodontophorida]
  • Cryptothyris [Dalmanellidae]
  • Cryptotreta, Pel'man 1977 [Cryptotretidae]
  • Ctena, Mörch 1860 [Lucinidae]
  • Ctenactis, Verrill 1864 [Fungiidae]
  • Ctenaspis [Pteraspidomorphes]
  • Cteniopleurium [Pterioida]
  • Ctenobactrites, Shimanskiy 1951 [Bactritidae]
  • Ctenoberyx [Beryciformes]
  • Ctenobolbina [Palaeocopida]
  • Ctenobolbinella, Kummerow 1953 [Beyrichiidae]
  • Ctenocardia, H. Adams and A. A 1857 [Cardiidae]
  • Ctenocephalichthys, Gaudant 1969 [Beryciformes]
  • Ctenocephalus, Hawle and Corda 1847 [Conocoryphidae]
  • Ctenoceras, Noetling 1884 [Orthoceratinae]
  • Ctenocheles, Kishinouye 1926 [Ctenochelidae]
  • Ctenochonetes [Strophochonetidae]
  • Ctenocolpus, Iredale 1924 [Turritellidae]
  • Ctenoconularia [Scyphozoa]
  • Ctenocrinus, Bronn 1840 [Monobathrida]
  • Ctenodentex, Storms 1897 [Perciformes]
  • Ctenodonta, Salter 1852 [Ctenodontidae]
  • Ctenodontella, Khalfin 1940 [Malletiidae]
  • Ctenognathodus [Conodontophorida]
  • Ctenoides, Mörch 1853 [Limidae]
  • Ctenoloculina [Palaeocopida]
  • Ctenonotella [Palaeocopida]
  • Ctenophora, phylum, Eschscholtz 1829 [Triploblastica]
  • Ctenopomichthys, Whitley 1940 [Scorpaeniformes]
  • Ctenopora [Cheilostomata]
  • Ctenopterus [Eurypterida]
  • Ctenopyge, Linnarsson 1880 [Olenidae]
  • Ctenorbitoides [Foraminifera]
  • Ctenosciaena, Fowler and Bean 1923 [Perciformes]
  • Ctenoscolex [Phyllodocemorpha]
  • Ctenostomata, order, Busk 1852 [Gymnolaemata]
  • Ctenostreon, Eichwald 1862 [Limidae]
  • Ctenothrissa [Actinopterygii]
  • Ctenothrissiformes, order, Patterson 1964 [Actinopteri]
  • Ctenurella, Orvig 1960 [Ptyctodontiformes]
  • Cterocardia [Cardiida]
  • Cteroclymenia, Bogoslovsky 1979 [Rectoclymeniidae]
  • Cualabaea [Coelacanthiformes]
  • Cubacula [Echinoconchidae]
  • Cubanina [Foraminifera]
  • Cubanirhynchia, Kamyschan 1968 [Rhynchonellidae]
  • Cubanothyris [Angustothyrididae]
  • Cubaochetoceras [Oppeliidae]
  • Cubestana [Neotaenioglossa]
  • Cubiceps, Lowe 1843 [Perciformes]
  • Cubiculovinea [Serpulimorpha]
  • Cubifenestella [Fenestrata]
  • Cubitostrea, Sacco 1897 [Ostreidae]
  • Cubitosulcus [Palaeocopida]
  • Cubtosulcus [Palaeocopida]
  • Cuburbita [Foraminifera]
  • Cuccoceras, C. Diener 1905 [Balatonitidae]
  • Cuctienophyllum [Anthozoa]
  • Cucullaea, Lamarck 1801 [Cucullaeidae]
  • Cucullaearca, Conrad 1865 [Arcidae]
  • Cucullaria, Conrad 1869 [Parallelodontidae]
  • Cucullipora [Cheilostomata]
  • Cucullograptus [Graptoloidea]
  • Cudmorella [Terebratellidae]
  • Cuersithyris [Lobothyrididae]
  • Cuifastraea, Melnikova 1983 [Cuifastraeidae]
  • Cuifia, Melnikova 1975 [Reimaniphylliidae]
  • Culicia, Dana 1846 [Rhizangiidae]
  • Culicocrinus, Muller 1855 [Monobathrida]
  • Culmenaspis, Repina 1972 [Ptychopariida]
  • Culmia [Neogastropoda]
  • Culmicrinus, Jaekel 1918 [Cladida]
  • Cultellus, Schumacher 1817 [Pharidae]
  • Cultriopsis [Grallatoridae]
  • Culumbodina [Conodontophorida]
  • Cumacea, order, Kroyer 1846 [Malacostraca]
  • Cumberlandina [Acrospiriferidae]
  • Cumberloceras, Ulrich et al. 1943 [Ellesmeroceratidae]
  • Cumingia [Semelidae]
  • Cumingsoceras, Flower 1950 [Uranoceratidae]
  • Cummingella, F.R.C. Reed 1942 [Phillipsiidae]
  • Cumminsia, Moore and Jeffords 1945 [Zaphrentoididae]
  • Cumularia [Hippuritida]
  • Cuna, Hedley 1902 [Condylocardiidae]
  • Cunanax, Iredale 1936 [Condylocardiidae]
  • Cunctocrinus, Kesling and Sigler 1969 [Calceocrinidae]
  • Cuneamya, Hall 1875 [Grammysiidae]
  • Cunearca, Dall 1898 [Arcidae]
  • Cuneatopora [Cryptostomata]
  • Cuneicardioceras [Cardioceratidae]
  • Cuneigervillia, Cox 1954 [Grallatoridae]
  • Cuneoceratina [Bythocytheridae]
  • Cuneocorbula, Cossmann 1886 [Corbulidae]
  • Cuneocythere [Podocopida]
  • Cuneolina [Cuneolinidae]
  • Cuneolinella [Foraminifera]
  • Cuneus [Foraminifera]
  • Cuneus [Cardiida]
  • Cuniculocystis [Rhombifera]
  • Cunitoceras, Weyer 1972 [Prionoceratidae]
  • Cunningtoniceras, Collignon 1937 [Acanthoceratidae]
  • Cunnolites, Gagnebin 1772 [Cunnolitidae]
  • Cupaniella [Neotaenioglossa]
  • Cuparius [Tetralobulidae]
  • Cuphosolenus [Aporrhaidae]
  • Cuphotifer [Neotaenioglossa]
  • Cupidoliva, Iredale 1924 [Olividae]
  • Cupressocrinites, G.A. Goldfuss 1831 [Cupressocrinitidae]
  • Cupuladria, Canu and Basler 1919 [Cupuladriidae]
  • Cupularostrum [Trigonirhynchiidae]
  • Cupulina [Demospongea]
  • Cupulocorona [Coronata]
  • Cupulocrinus [Cupulocrinidae]
  • Curetia [Heterostrophia]
  • Curfsina [Podocopida]
  • Curiaspis, Sdzuy 1955 [Trilobita]
  • Curionia, Ronchetti and Allasinaz 1965 [Neoleptonidae]
  • Curriella, Lamont 1978 [Encrinuridae]
  • Cursina [Foraminifera]
  • Curtastrum [Anthozoa]
  • Curticia, Walcott 1905 [Curticiidae]
  • Curtitheca [Orthothecida]
  • Curtognathus [Conodontophorida]
  • Curtohibolites [Belemnitida]
  • Curvirostrum [Arcida]
  • Curvitriordo [Isorophida]
  • Curvostrea, Vialov 1936 [Ostreidae]
  • Cusacrinus, Bowsher 1955 [Monobathrida]
  • Cushmania [Foraminifera]
  • Cushmanidea [Podocopida]
  • Cushmanina, Jones 1984 [Ellipsolagenidae]
  • Cuspidaria, Dall 1886 [Cuspidariidae]
  • Cussetostrea [Pterioida]
  • Cutchisphinctes [Cephalopoda]
  • Cuvierina, Boas 1886 [Cavoliniidae]
  • Cuvilliera [Cyclostomata]
  • Cuvillierina [Foraminifera]
  • Cuyanaspis, Rusconi 1953 [Trilobita]
  • Cuyaniceras [Cephalopoda]
  • Cyamella, Zhou and Xiang 1993 [Proetida]
  • Cyamidia [Fibulariidae]
  • Cyamiomactra, Bernard 1897 [Cyamiidae]
  • Cyamocarcinus, Bittner 1883 [Decapoda]
  • Cyamocephalus [Xiphosurida]
  • Cyamocytheridea [Podocopida]
  • Cyamodus, H. von Meyer 1863 [Cyamodontidae]
  • Cyamops, Owens 1978 [Brachymetopidae]
  • Cyanaphyllum [Anthozoa]
  • Cyanocyclas [Cardiida]
  • Cyanoplax, Pilsbry 1892 [Ischnochitonidae]
  • Cyathactis, Soshkina 1955 [Ptychophyllidae]
  • Cyathaspis [Pteraspididae]
  • Cyathaxonella, Stuckenberg 1895 [Cyathaxoniidae]
  • Cyathaxonia, Michelin 1847 [Cyathaxoniidae]
  • Cyathelia, Milne-Edwards and Haime 1849 [Oculinidae]
  • Cyathidium, Steenstrup 1846 [Cyrtocrinida]
  • Cyathoceras, Moseley 1881 [Caryophylliidae]
  • Cyathochitina [Rhizopodea]
  • Cyathocidaris [Cidaridae]
  • Cyathoclisia, Dingwall 1926 [Aulophyllidae]
  • Cyathocoenia, Duncan 1867 [Pinacophyllidae]
  • Cyathocricus [Ajacicyathida]
  • Cyathocrinites, Miller 1821 [Cyathocrinitidae]
  • Cyathocystis, Schmidt 1879 [Cyathocystidae]
  • Cyathodictya [Reticulosa]
  • Cyathodonta, Conrad 1849 [Thraciidae]
  • Cyathopaedium, Schlüter 1889 [Pycnostylidae]
  • Cyathophora, Michelin 1843 [Stylinidae]
  • Cyathophycus, Walcott 1879 [Hintzespongiidae]
  • Cyathophyllia, Fromentel 1865 [Montlivaltiidae]
  • Cyathophylliopsis, Beauvais 1970 [Montlivaltiidae]
  • Cyathophylloides, Dybowski 1873 [Stauriidae]
  • Cyathophyllum, Goldfuss 1826 [Cyathophyllidae]
  • Cyathophyscus [Porifera]
  • Cyathoseris, Milne-Edwards and Haime 1849 [Agariciidae]
  • Cyathosmilia, Tenison-Woods 1878 [Guyniidae]
  • Cyathospongia [Demospongea]
  • Cyathotheca, Jaekel 1927 [Cyathothecidae]
  • Cyathotrochus, Bourne 1905 [Turbinoliidae]
  • Cyathus [Aparchitidae]
  • Cybantyx, Lane and Thomas 1978 [Styginidae]
  • Cybele, Lovn 1845 [Encrinuridae]
  • Cybellela, Reed 1928 [Encrinuridae]
  • Cybeloides, Slocum 1913 [Encrinuridae]
  • Cybelopsis, Poulsen 1927 [Pliomeridae]
  • Cybelurus, Levitsky 1962 [Encrinuridae]
  • Cycladicama, Valenciennes 1854 [Ungulinidae]
  • Cycladigera [Linoporellidae]
  • Cycladophora, Ehrenberg 1847 [Theopiliidae]
  • Cyclammina, Brady 1876 [Lituolidae]
  • Cyclampterium, Haeckel 1887 [Lophocyrtiidae]
  • Cyclaster, Cotteau 1856 [Brissidae]
  • Cyclastraea, Alloiteau 1952 [Fungiidae]
  • Cyclastrum, Rüst 1898 [Angulobracchiidae]
  • Cycledomia [Soritidae]
  • Cycleryon, Glaessner 1965 [Eryonidae]
  • Cyclicopora [Cyclicoporidae]
  • Cyclina [Cardiida]
  • Cyclindroclavulina [Foraminifera]
  • Cyclindrocyathus, Alloiteau 1952 [Scleractinia]
  • Cyclinella, Dall 1902 [Veneridae]
  • Cyclinorbis, J. Makiyama 1926 [Cardiida]
  • Cyclobacia [Micrabaciidae]
  • Cyclobactrites, Shimanskiy 1955 [Bactritida]
  • Cyclobatis, Egerton 1844 [Trygonidae]
  • Cyclocancer, Beurlen 1958 [Cancridae]
  • Cyclocardia, Conrad 1867 [Carditidae]
  • Cycloceltites, E. v. Mojsisovics 1893 [Cycloceltitidae]
  • Cycloceras, M'Coy 1844 [Orthocerida]
  • Cyclochlamys, Finlay 1926 [Propeamussiidae]
  • Cyclocites [Cyclostomata]
  • Cycloclymenia, J. J. Sepkoski 2002 [Phenacoceratidae]
  • Cycloclypeus [Nummulitidae]
  • Cyclocoelia [Cyclocoeliidae]
  • Cyclocolposa [Bryocryptellidae]
  • Cycloconcha [Cycloconchidae]
  • Cyclocorystes, Bell 1858 [Xanthidae]
  • Cyclocrinus, d'Orbigny 1850 [Cyclocrinidae]
  • Cyclocyathella [Ajacicyathida]
  • Cyclocyrtendoceras, Balashov 1961 [Cyrtendoceratidae]
  • Cyclodostomia [Heterostrophia]
  • Cycloes, De Haan 1837 [Calappidae]
  • Cycloflabellum, Chevalier 1961 [Flabellidae]
  • Cycloforina, Luczkowska 1972 [Hauerinidae]
  • Cyclogeorgina [Problematica]
  • Cyclognathina, Lermontova 1951 [Ptychopariida]
  • Cyclograptus [Tuboidea]
  • Cyclolampas [Collyritidae]
  • Cyclolberis [Myodocopida]
  • Cyclolenzellina [Trilobita]
  • Cyclolina [Foraminifera]
  • Cyclolites, Lamarck 1801 [Cunnolitidae]
  • Cyclolitopsis, Reuss 1873 [Cyclolitidae]
  • Cyclolituites, Remelé 1886 [Lituitidae]
  • Cyclolobus, Waagen 1879 [Cyclolobidae]
  • Cycloloculina [Foraminifera]
  • Cyclolorenzella, Kobayashi 1960 [Diceratocephalidae]
  • Cyclomactra [Cardiida]
  • Cyclomedusa, Sprigg 1947 [Cnidaria]
  • Cyclomolops [Neotaenioglossa]
  • Cyclomyonia [Paurorthidae]
  • Cyclope, Risso 1826 [Nassariidae]
  • Cyclopecten, Verrill 1897 [Propeamussiidae]
  • Cyclopellatia, Cossmann 1907 [Lucinidae]
  • Cyclopelta [Fenestrata]
  • Cycloperiella [Stomachetosellidae]
  • Cyclophaenopora [Stenolaemata]
  • Cyclophyllia, Milne-Edwards and Haime 1848 [Cyclolitidae]
  • Cyclophyllopsis, Alloiteau 1951 [Cyclophyllopsiidae]
  • Cyclopites, Zhuravleva 1962 [Polyelasmoceratidae]
  • Cyclopites, Raasch 1952 [Aglaspididae]
  • Cycloplectoceras, Ulrich et al. 1942 [Tarphyceratidae]
  • Cyclopora [Trepostomida]
  • Cycloporella [Trepostomida]
  • Cycloporidium [Sphaeractinida]
  • Cycloprosopon, E. Lorenthey and K. Beurlen 1929 [Goniodromitidae]
  • Cyclopseudedomia [Rhapydioninidae]
  • Cyclopsinella [Foraminifera]
  • Cycloptychius, Young 1866 [Palaeoniscidae]
  • Cycloputeolina [Soritidae]
  • Cyclopyge, Hawle and Corda 1847 [Cyclopygidae]
  • Cyclorbiculina [Soritidae]
  • Cyclorbiculinoides [Soritidae]
  • Cyclorbitopsella [Foraminifera]
  • Cyclorhynchia [Cyclospiridae]
  • Cyclorisma, Dall 1902 [Veneridae]
  • Cyclorismina, Marwick 1927 [Veneridae]
  • Cycloscala, Dall 1889 [Epitoniidae]
  • Cycloseris, Milne-Edwards and Haime 1849 [Fungiidae]
  • Cycloserpula, K.O.A. Parsch 1956 [Serpulimorpha]
  • Cyclosphaeroma, H. Woodward 1890 [Isopoda]
  • Cyclospira, Hall and Clarke 1893 [Cyclospiridae]
  • Cyclospongia [Archaeogastropoda]
  • Cyclostomaria [Archaeogastropoda]
  • Cyclostomata, order, Busk 1852 [Stenolaemata]
  • Cyclostomiceras, Hyatt in Zittel 1900 [Cyclostomiceratidae]
  • Cyclostrema, Marryatt 1818 [Liotiidae]
  • Cyclostremela [Archaeogastropoda]
  • Cyclostremiscus, Pilsbry and Olsson 1945 [Vitrinellidae]
  • Cyclostromella [Vitrinellidae]
  • Cyclosunneta [Cardiida]
  • Cyclotellina, Cossmann 1886 [Tellinidae]
  • Cyclothone, Goode and Bean 1883 [Stomiatiformes]
  • Cyclothyca [Amathinidae]
  • Cyclothyreus, M. Remes 1895 [Goniodromitidae]
  • Cyclothyris, M'Coy 1844 [Cyclothyrididae]
  • Cyclotrypa [Fistuliporidae]
  • Cycloturbo [Archaeogastropoda]
  • Cycloxanthops, Rathbun 1897 [Xanthidae]
  • Cyclozoa, class [Cnidaria]
  • Cyclus, de Koninck 1841 [Cyclidae]
  • Cydimia [Meganterididae]
  • Cydonocrinus, Bather 1913 [Codiacrinidae]
  • Cydrocrinus, Kirk 1940 [Cladida]
  • Cylichna, Lovén 1846 [Cylichnidae]
  • Cylichnania, Marwick 1931 [Cylichnidae]
  • Cylichnatys, Kuroda & Habe 1952 [Cephalaspida]
  • Cylichnella, Gabb 1873 [Cylichnidae]
  • Cylichnina, Monterasato 1884 [Retusidae]
  • Cylichnopsis, Cossmann 1904 [Cephalaspida]
  • Cylicoceras, Buckman 1899 [Graphoceratidae]
  • Cylicocrinus, Miller 1892 [Monobathrida]
  • Cylicoopsis [Axinellida]
  • Cylinder [Neogastropoda]
  • Cylindracanthus, Leidy 1856 [Dercetidae]
  • Cylindriscala, de Boury 1912 [Neotaenioglossa]
  • Cylindritella, White 1887 [Cephalaspida]
  • Cylindrites, Gesner 1758 [Cephalaspida]
  • Cylindrobullina [Cylindrobullinidae]
  • Cylindrochitina [Rhizopodea]
  • Cylindroclavulina [Foraminifera]
  • Cylindrocolaniella [Foraminifera]
  • Cylindromitra [Neogastropoda]
  • Cylindrophyllum, Simpson 1900 [Eridophyllidae]
  • Cylindrophyma, Zittel 1878 [Cylindrophymatidae]
  • Cylindropora [Cyclostomata]
  • Cylindrosmilia [Scleractinia]
  • Cylindrostylus, Sokolov 1955 [Multithecoporidae]
  • Cylindroteuthis [Belemnitida]
  • Cylindrotheca [Rhabdopleurida]
  • Cylindrotrocholina [Foraminifera]
  • Cylindrotruncatum, N. F. Sohl 1963 [Acteocinidae]
  • Cyliocrinus, Jaekel 1918 [Cladida]
  • Cyllene, Gray 1834 [Nassariidae]
  • Cyllenina, Bellardi 1882 [Nassariidae]
  • Cymabolbina [Palaeocopida]
  • Cymaceras [Oppeliidae]
  • Cymaclymenia, J. J. Sepkoski 2002 [Cymaclymeniidae]
  • Cymahoplites [Hoplitidae]
  • Cymakra [Neogastropoda]
  • Cymatelasma, Hill and Butler 1936 [Ptenophyllidae]
  • Cymatella, Sytova 1970 [Ptenophyllidae]
  • Cymatiella [Ranellidae]
  • Cymatium, Röding 1798 [Ranellidae]
  • Cymatodus, Newberry and Worthen 1870 [Chondrichthyes]
  • Cymatoga [Isopoda]
  • Cymatogaster, Gibbons 1854 [Perciformes]
  • Cymatograptus [Dendroidea]
  • Cymatoica, Dall 1889 [Tellinidae]
  • Cymatonautilus, Spath 1927 [Cymatoceratidae]
  • Cymatonota, Ulrich 1893 [Modiomorphidae]
  • Cymatophos, Pilsbry and Olsson 1941 [Buccinidae]
  • Cymatosaurus, Fritsch 1894 [Eosauropterygia]
  • Cymatosyrinx, Dall 1889 [Turridae]
  • Cymbalopora [Foraminifera]
  • Cymbaloporella [Foraminifera]
  • Cymbaloporetta, Cushman 1928 [Cymbaloporidae]
  • Cymbidium, Kirk 1926 [Subrianidae]
  • Cymbiocrinus, Kirk 1944 [Ampelocrinidae]
  • Cymbiola, Swainson 1831 [Volutidae]
  • Cymbionites [Eocrinoidea]
  • Cymbistropheodonta [Strophodontidae]
  • Cymbites, Neumayr 1878 [Cymbitidae]
  • Cymbithyris [Billingsellidae]
  • Cymbium [Volutidae]
  • Cymbochlaenia [Demospongea]
  • Cymbophora, Gabb 1869 [Mactridae]
  • Cymbospondylus, Leidy 1868 [Cymbospondylidae]
  • Cymbricia [Bohemiellidae]
  • Cymella, Meek 1864 [Poromyidae]
  • Cymenorhytis [Neotaenioglossa]
  • Cymia, Mörch 1860 [Muricidae]
  • Cymoceras, McCaleb 1964 [Neodimorphoceratidae]
  • Cymodoce [Isopoda]
  • Cymoproductus [Productellidae]
  • Cymosmilia, Koby 1894 [Rhipidogyridae]
  • Cymostrophia, Caster 1939 [Douvillinidae]
  • Cynisca, H. Adams and A. Adams 1854 [Turbinidae]
  • Cyniscella, Cossmann 1918 [Ataphridae]
  • Cynocercus, Cope 1872 [Cheloniidae]
  • Cynopodius, Traquair 1881 [Chondrichthyes]
  • Cynoscion, Gill 1861 [Sciaenidae]
  • Cypellia, Pomel 1872 [Cypelliidae]
  • Cypelometra [Comatulida]
  • Cyphaspides, Novak 1890 [Aulacopleuridae]
  • Cyphaspis, H. Burmeister 1843 [Aulacopleuridae]
  • Cyphinioides, Reed 1942 [Proetidae]
  • Cyphocrinus, Miller 1892 [Diplobathrida]
  • Cyphoma, Röding 1798 [Ovulidae]
  • Cyphomena, Cooper 1956 [Strophomenidae]
  • Cyphomenoidea, L. R. M. Cocks 1968 [Strophomenidae]
  • Cyphonella [Porinidae]
  • Cyphoniscus, Salter 1853 [Asaphida]
  • Cyphonochelus, Jousseaume 1882 [Muricidae]
  • Cyphonotus, Bell 1863 [Dynomenidae]
  • Cyphoproetus, Kegel 1927 [Proetidae]
  • Cyphotalosia [Araksalosiidae]
  • Cyphoterorhynchus [Trigonirhynchiidae]
  • Cyphotrypa [Trepostomida]
  • Cypraea (Mauritia), Troschel 1863 [Cypraeidae]
  • Cypraecassis, Stuchburry 1837 [Cassidae]
  • Cypraedia, Swainson 1940 [Amphiperatidae]
  • Cypraeerato [Neotaenioglossa]
  • Cypraeogemmula [Neotaenioglossa]
  • Cypraeopsis [Neotaenioglossa]
  • Cypraeotrivia [Cypraeidae]
  • Cyprella [Myodocopida]
  • Cyprideis [Podocopida]
  • Cypridella [Myodocopida]
  • Cypridellina [Myodocopida]
  • Cypridina [Cypridinidae]
  • Cypridinella [Myodocopida]
  • Cypridodella [Conodontophorida]
  • Cypridopsis [Podocopida]
  • Cyprilepas [Cirripedia]
  • Cyprimeria, Conrad 1864 [Veneridae]
  • Cyproglobina [Neotaenioglossa]
  • Cypropterina [Neotaenioglossa]
  • Cyprosina [Myodocopida]
  • Cyprosis [Myodocopida]
  • Cyptendoceras, Ulrich and Foerste 1936 [Baltoceratidae]
  • Cyptoporocyathus [Capsulocyathida]
  • Cyranichthys [Alepisauriformes]
  • Cyranoia [Sellithyrididae]
  • Cyrbasia [Cerithiopsidae]
  • Cyrbasiotreta [Siphonotretidae]
  • Cyrenobatissa [Cardiida]
  • Cyrenodonax, Dall 1903 [Corbiculidae]
  • Cyrenopsis [Cardiida]
  • Cyrtactinoceras, Hyatt in Zittel 1900 [Proteoceratidae]
  • Cyrtella, Fredericks 1924 [Syringothyrididae]
  • Cyrtendoceras, Remelé 1886 [Cyrtendoceratidae]
  • Cyrtentactinia, Foreman 1963 [Popofskyellidae]
  • Cyrthoceratites, d'Archiac and deVerneuil 1842 [Nothoceratidae]
  • Cyrtia [Cyrtiidae]
  • Cyrtina, Davidson 1858 [Cyrtinidae]
  • Cyrtinaella [Cyrtinidae]
  • Cyrtinoides [Ambocoeliidae]
  • Cyrtinopsis [Cyrtinopsidae]
  • Cyrtiopsis [Cyrtospiriferidae]
  • Cyrtiorina [Ulbospiriferidae]
  • Cyrtiphaeronemium [Spumellaria]
  • Cyrtisphaeractenium, Deflandre 1972 [Archocyrtiidae]
  • Cyrtobactrites, Erben 1960 [Bactritidae]
  • Cyrtobaltoceras, R. H. Flower 1964 [Baltoceratidae]
  • Cyrtobolia, Pocta 1883 [Cystispongiidae]
  • Cyrtocalpis [Nassellaria]
  • Cyrtocapsa, Haeckel 1881 [Eucyrtidiidae]
  • Cyrtocapsella [Nassellaria]
  • Cyrtocapsella, Haeckel 1887 [Eucyrtidiidae]
  • Cyrtoceras [Cephalopoda]
  • Cyrtoceratites, Goldfuss 1830 [Archiacoceratidae]
  • Cyrtocerina, Billings 1865 [Cyrtocerinidae]
  • Cyrtocheilus, Shimanskiy 1962 [Polyelasmoceratidae]
  • Cyrtochetus, Cossmann 1899 [Buccinidae]
  • Cyrtochilus, Meek 1876 [Baculitidae]
  • Cyrtochites [Problematica]
  • Cyrtoclymenia, J. J. Sepkoski 2002 [Cyrtoclymeniidae]
  • Cyrtocrinida, order [Crinoidea]
  • Cyrtocrinus, Jeakel 1892 [Cyrtocrinida]
  • Cyrtocyprus [Metacopida]
  • Cyrtodaria, Reuss 1801 [Hiatellidae]
  • Cyrtodechenella, Richter 1950 [Proetidae]
  • Cyrtogomphoceras, Foerste 1924 [Cyrtogomphoceratidae]
  • Cyrtogomphus, Flower 1938 [Poterioceratidae]
  • Cyrtograptus [Graptoloidea]
  • Cyrtometopus, Angelin 1854 [Cheiruridae]
  • Cyrtoniscus [Anopliidae]
  • Cyrtonotella, Schuchert and Cooper 1931 [Archaeorthidae]
  • Cyrtonotreta, Holmer 1989 [Acrotretidae]
  • Cyrtonowakia, Alberti 1986 [Procorniculinidae]
  • Cyrtonybyoceras, Teichert 1933 [Armenoceratidae]
  • Cyrtophyllum, Lindström 1882 [Cyrtophyllidae]
  • Cyrtopinna, Mörch 1853 [Pinnidae]
  • Cyrtopleura, Tryon 1862 [Pholadidae]
  • Cyrtopleurites, E. v. Mojsisovics 1893 [Tibetitidae]
  • Cyrtopora [Cyclostomata]
  • Cyrtoproetus, F.R.C. Reed 1943 [Proetidae]
  • Cyrtoprora, A. A. Opik 1967 [Odontopleurida]
  • Cyrtorhina, T. Monod 1956 [Raninidae]
  • Cyrtorizoceras, Hyatt 1900 [Oncoceratidae]
  • Cyrtorostra [Deltopectinidae]
  • Cyrtosiceras, Hyatt 1900 [Oppeliidae]
  • Cyrtospirifer, Nalivkin 1924 [Cyrtospiriferidae]
  • Cyrtospyroceras, Flower 1938 [Spyroceratidae]
  • Cyrtosteus, Gross 1932 [Arthrodiriformes]
  • Cyrtosymbole, Richter 1913 [Proetidae]
  • Cyrtosymboloides, Alberti 1967 [Tropidocoryphidae]
  • Cyrtothoracoceras, Turner 1964 [Spyroceratidae]
  • Cyrtothyris [Sellithyrididae]
  • Cyrtovaginoceras, Kobayashi 1934 [Cyrtendoceratidae]
  • Cyrtulotibia [Neotaenioglossa]
  • Cystacythereis [Podocopida]
  • Cystammina, Neumayer 1889 [Ammosphaeroidinidae]
  • Cystaster, Hall 1871 [Hemicystitidae]
  • Cystelasma, Miller 1891 [Pentaphyllidae]
  • Cysticamara [Camaroidea]
  • Cysticyathus [Anthozoa]
  • Cystihalysites, Chernyshev 1941 [Halysitidae]
  • Cystihexagonaria [Anthozoa]
  • Cystilophophyllum, Fomichev 1953 [Aulophyllidae]
  • Cystipaliphyllum, Lavrusevich 1964 [Paliphyllidae]
  • Cystiphorolites, Miller 1889 [Holmophyllidae]
  • Cystiphylloides (Cladionophyllum), Stumm 1961 [Cystiphyllidae]
  • Cystiphylloides (Comanaphyllum), Flügel 1961 [Cystiphyllidae]
  • Cystiphylloides (Lythophyllum), Wedekind 1925 [Cystiphyllidae]
  • Cystiphylloides (Skoliophyllum), Wedekind 1937 [Cystiphyllidae]
  • Cystiphyllum, Lonsdale 1839 [Cystiphyllidae]
  • Cystiphyllum (Cruciphyllum), Lavrusevich 1976 [Cystiphyllidae]
  • Cystiphyllum (Cysticonophyllum), Zaprudskaya and Ivanovskiy 1962 [Cystiphyllidae]
  • Cystiphyllum (Gyalophyllum), Wedekind 1927 [Cystiphyllidae]
  • Cystiphyllum (Gyaloplasma), Zhavoronkova 1976 [Cystiphyllidae]
  • Cystiphyllum (Hedstroemophyllum), Wedekind 1927 [Cystiphyllidae]
  • Cystiphyllum (Zonophyllum), Wedekind 1924 [Cystiphyllidae]
  • Cystiramus [Cystoporata]
  • Cystisella [Bryocryptellidae]
  • Cystispina, R. Richter and E. Richter 1939 [Proetidae]
  • Cystispongia, Roemer 1864 [Cystispongiidae]
  • Cystistroma, Etheridge 1895 [Stromatoceriidae]
  • Cystitrypa [Cystoporata]
  • Cystitrypanopora, Jia 1955 [Aulocystidae]
  • Cystoblastus [Rhombifera]
  • Cystocantrilla [Anthozoa]
  • Cystocerium, Nestor 1976 [Stromatoceriidae]
  • Cystodendropora, Lin 1962 [Micheliniidae]
  • Cystodictya, Ulrich 1882 [Cystodictyonidae]
  • Cystodytes [Tunicata]
  • Cystograptus [Graptoloidea]
  • Cystolonsdaleia, Fomichev 1953 [Petalaxidae]
  • Cystolyrielasma [Anthozoa]
  • Cystomatochilina [Palaeocopida]
  • Cystophora, Nilsson 1820 [Phocidae]
  • Cystophrentis, Yü 1931 [Uraliniidae]
  • Cystoporata, order [Stenolaemata]
  • Cystoporella [Cyclostomata]
  • Cystostictoporus [Rhinidictyidae]
  • Cystostroma, Galloway and St. Jean 1957 [Rosenellidae]
  • Cystothalamiella [Aphrosalpingidae]
  • Cythara, Schumacher 1817 [Turridae]
  • Cytharella, Monterosato 1875 [Turridae]
  • Cytheralison [Podocopida]
  • Cythere, O. F. Mller 1785 [Cytheridae]
  • Cytherea (Transennella), Dall 1884 [Veneridae]
  • Cythereis, Jones 1849 [Cytheridae]
  • Cytherella [Cytherellidae]
  • Cytherellina [Bairdiocyprididae]
  • Cytherelloidea, Alexander 1929 [Cytherellidae]
  • Cytheretta [Podocopida]
  • Cytheridea, Bosquet [Cytherideidae]
  • Cytheridella [Podocopida]
  • Cytheriopsis, Conrad 1865 [Veneridae]
  • Cytherocardia [Cardiida]
  • Cytherodon [Trigoniida]
  • Cytherois [Podocopida]
  • Cytheroma [Podocopida]
  • Cytheromorpha, Hirschmann 1909 [Cytheridae]
  • Cytheropterina [Podocopida]
  • Cytheropteron, Sars 1866 [Cytheruridae]
  • Cytherura [Podocopida]
  • Cytidocrinus, Kirk 1944 [Monobathrida]
  • Cytis [Cyclostomata]
  • Cytocrinus, Roemer 1860 [Monobathrida]
  • Cyttarocrinus, Goldring 1923 [Monobathrida]
  • Cyttaroplasma [Anthozoa]
  • Cyttoides, Wettstein 1886 [Zeiformes]
  • Czarnockia, Rozkowska 1969 [Laccophyllidae]
  • Czekanowskites, C. Diener 1915 [Longobarditidae]
  • Dabashanella, Huo et al 1983 [Bradoriida]
  • Dabashanites [Siphogonuchitidae]
  • Dabashanospira [Atrypinidae]
  • Dacicardium [Cardiida]
  • Dacrydium, Torell 1859 [Mytilidae]
  • Dacryoconarida, order, Fisher 1962 [Tentaculita]
  • Dacryonella [Cheilostomata]
  • Dacryopora [Cyclostomata]
  • Dacryoporella [Cheilostomata]
  • Dactylaraea, d'Orbigny 1849 [Microsolenidae]
  • Dactylioceras [Dactylioceratidae]
  • Dactyliosphaera, Squinabol 1904 [Dactyliosphaeridae]
  • Dactylocalycites [Demospongea]
  • Dactylocalyx [Lychniscosa]
  • Dactylocephalus, Hsu 1948 [Hungaiidae]
  • Dactylocoenia, d'Orbigny 1849 [Thamnasteriidae]
  • Dactylocrinus [Sagenocrinida]
  • Dactylocystis [Diploporita]
  • Dactylogonia, Ulrich and Cooper 1942 [Strophomenidae]
  • Dactylopogon, Marck 1868 [Actinopterygii]
  • Dactyloptena [Dactylopteriformes]
  • Dactylopteriformes, order [Osteichthyes]
  • Dactylopterus [Dactylopteriformes]
  • Dactylosaurus, Gürich 1884 [Eosauropterygia]
  • Dactylosmilia, d'Orbigny 1849 [Faviidae]
  • Dactyloteuthis [Megateuthididae]
  • Dactylotreta, Rowell and Henderson 1978 [Acrotretidae]
  • Dadocrinus [Millericrinida]
  • Daedalichthys, Brough 1931 [Palaeonisciformes]
  • Daedalocrinus, Ulrich 1925 [Crinoidea]
  • Dagmaraephyllum, Rogozov 1962 [Cyathopsidae]
  • Dagmarella [Foraminifera]
  • Dagmarita [Biseriamminidae]
  • Dagnachonetes [Chonetidae]
  • Dagnoceras, G. v. Arthaber 1911 [Dinaritidae]
  • Daguinaspis, Hupe and Abadie 1950 [Fallotaspididae]
  • Dagysorhynchia [Basiliolidae]
  • Dahaiella, Jiang 1982 [Archaeocopida]
  • Daharina [Cardiida]
  • Dahomeya [Podocopida]
  • Daihuaia, Yuan 1988 [Proetida]
  • Dailyatia, Bischoff 1976 [Kennardiidae]
  • Dailycyathus [Ajacicyathida]
  • Dainella [Foraminifera]
  • Dainita [Foraminifera]
  • Dainitella [Foraminifera]
  • Daira, De Haan 1833 [Decapoda]
  • Daitingichthys, Arratia 1987 [Clupeiformes]
  • Daixina, Rozovskaya 1949 [Schwagerinidae]
  • Daixites, Ruzhencev 1941 [Uddenitinae]
  • Dakaria [Cheilostomata]
  • Dakeoceras, Ulrich and Foerste 1931 [Ellesmeroceratidae]
  • Dakosaurus, F. A. Quenstedt 1856 [Metriorhynchidae]
  • Dala, Muller 1983 [Brachypoda]
  • Dalatias, Rafinesque 1810 [Squalidae]
  • Dalecarlioceras, Frye 1987 [Oncoceratidae]
  • Daleiella [Podocopida]
  • Dalejeproetus, Snajdr 1977 [Tropidocoryphidae]
  • Dalejina [Rhipidomellidae]
  • Dalejocystis [Soluta]
  • Dalejodiscus [Sowerbyellidae]
  • Dalelina, Sun 1978 [Leperditicopida]
  • Dalerhynchus [Trigonirhynchiidae]
  • Dalinuria [Productellidae]
  • Daljanolites, Leleshus 1964 [Pachyporidae]
  • Dalliella [Neotaenioglossa]
  • Dalligas [Laqueidae]
  • Dallina, Beecher 1893 [Dallinidae]
  • Dallinella [Terebrataliidae]
  • Dallitesta, Mansfield 1930 [Naticidae]
  • Dallithyris [Terebratulidae]
  • Dallocardia, Stewart 1930 [Cardiidae]
  • Dallonella [Podocopida]
  • Dalmanella, J. Hall and J. M. Clarke 1892 [Dalmanellidae]
  • Dalmanellopsis [Draboviidae]
  • Dalmaniopsis [Arthropoda]
  • Dalmanites, Barrande 1852 [Dalmanitidae]
  • Dalmanitina, Reed 1905 [Dalmanitidae]
  • Dalmaniturus, Chernysheva 1937 [Phacopida]
  • Dalmanophyllum, Lang and Smith 1939 [Streptelasmatidae]
  • Dalmasiceras [Neocomitidae]
  • Dalmatichthys, Radovcic 1975 [Polymixiiformes]
  • Dalmatites [Meekoceratidae]
  • Dalnia, Fedorowski 1973 [Pentaphyllidae]
  • Dalpiaziella, Cadrobbi 1962 [Anguilliformes]
  • Damaiaoaspis [Ptychopariida]
  • Damalichthys, Girard 1855 [Perciformes]
  • Damaoella [Ostracoda]
  • Damesella, Walcott 1905 [Damesellidae]
  • Damesia [Naticopsidae]
  • Damesiceras [Cephalopoda]
  • Damesites, Matsumoto 1942 [Desmoceratidae]
  • Damiriella [Palaeocopida]
  • Damonella [Podocopida]
  • Dampietrigonia [Trigoniida]
  • Dananzhuangaspis, Lin 1983 [Ptychopariida]
  • Danaoceras, Foerste 1926 [Polyelasmoceratidae]
  • Danaphos, Bruun 1931 [Stomiatiformes]
  • Danatinia, Daniltshenko 1968 [Lampridiformes]
  • Dandya, White and Moy-Thomas 1941 [Semionotidae]
  • Danella [Thecideidae]
  • Dannevigia, Whitley 1941 [Ophidiiformes]
  • Danoceras, Troedsson 1926 [Diestoceratidae]
  • Danubiella [Hauerinidae]
  • Danubisphinctes [Cephalopoda]
  • Danubites, E. v. Mojsisovics 1893 [Danubitidae]
  • Danzania [Ingelarellidae]
  • Danzikoceras [Nautilida]
  • Daonella [Halobiidae]
  • Dapalis, Gistl 1848 [Serranidae]
  • Dapaloides, Gaudant 1985 [Perciformes]
  • Dapedium, Leach 1822 [Dapediidae]
  • Daphnella, Hinds 1844 [Turridae]
  • Daphnites, E. v. Mojsisovics 1893 [Parathisbitidae]
  • Daphnobela [Neogastropoda]
  • Dapsilodus [Conodontophorida]
  • Daradaster [Pliolampadidae]
  • Daranyia, Lorenthey 1901 [Decapoda]
  • Darbya, Bartsch 1934 [Turridae]
  • Dardanula [Neotaenioglossa]
  • Dardanus, O. Paulson 1875 [Paguridae]
  • Darellia [Graphoceratidae]
  • Darendeella [Hippuritida]
  • Dariellina [Foraminifera]
  • Dariopsidae, family [Foraminifera]
  • Darjella [Foraminifera]
  • Darmuthia [Cephalaspidiformes]
  • Daronia, A. Adams 1861 [Adeorbidae]
  • Darteplicatula [Pterioida]
  • Dartoceras, Foerste 1936 [Cephalopoda]
  • Dartonaspis, Miller 1936 [Elviniidae]
  • Dartonoceras [Endocerida]
  • Darvasites [Schwagerinidae]
  • Darwasophyllum, Pyzhyanov 1964 [Geyerophyllidae]
  • Dasbergoceras [Nautilida]
  • Dasciocrinus, Kirk 1939 [Cladida]
  • Dasmia, Milne-Edwards and Haime 1848 [Caryophylliidae]
  • Dasmiopsis, Oppenheim 1930 [Caryophylliidae]
  • Dasmosmilia, Pourtalès 1880 [Caryophylliidae]
  • Dasometopus, Resser 1936 [Holocephalinidae]
  • Dastilbe, Jordan 1910 [Gonorhynchiformes]
  • Dasyatis, Rafinesque 1810 [Dasyatidae]
  • Dasyceras [Phylloceratitida]
  • Dasyconus [Hydroconozoa]
  • Dasyostoma [Neotaenioglossa]
  • Datangia [Monticuliferidae]
  • Datta [Pterioida]
  • Daucina [Foraminifera]
  • Daucinoides [Nodosariidae]
  • Davanirhynchia [Rhynchonellidae]
  • Davichthys, Forey 1973 [Elopiformes]
  • Davidsonella [Bactryniidae]
  • Davidsonia, Bouchard-Chantereaux 1849 [Davidsoniidae]
  • Davidsoniatrypa [Carinatinidae]
  • Daviesiconus [Foraminifera]
  • Daviesiella [Daviesiellidae]
  • Daviesina [Lepitorbitoididae]
  • Davoustia [Eodevonariidae]
  • Dawania [Palaeocopida]
  • Dawsonelloides [Strophochonetidae]
  • Dawsonia, C.F. Hartt 1868 [Eodiscidae]
  • Dawsonocerina, Horny 1956 [Dawsonoceratidae]
  • Daxatina, Strand 1929 [Trachyceratidae]
  • Daxia [Mayncinidae]
  • Dayia [Dayiidae]
  • Dayiceras [Polymorphitidae]
  • Dayongia, Xiang and Li 1986 [Phacopida]
  • Daytonia, Holloway 1981 [Dalmanitidae]
  • Dazhucrinus, Mu and Wu 1974 [Crinoidea]
  • Deacybele, Whittington 1965 [Encrinuridae]
  • Deadwoodia, Resser 1938 [Dokimocephalidae]
  • Deanaspis, Hughes et al. 1975 [Trinucleidae]
  • Deania, Jordan and Snyder 1902 [Centrophoridae]
  • Dearbornia [Acrothelidae]
  • Debarina [Haplophragmoididae]
  • Debnikiella [Anthozoa]
  • Decacystis [Cincta]
  • Decadocrinus, Wachsmuth and Springer 1879 [Poteriocrinidae]
  • Decaheliocoenia [Scleractinia]
  • Decameros, Orbigny 1850 [Comatulida]
  • Decaphyllum, Frech 1885 [Anthozoa]
  • Decapterus, Bleeker 1850 [Perciformes]
  • Decaschisma, Fay 1961 [Phaenoschismatidae]
  • Decatopecten, Sowerby 1839 [Pectinidae]
  • Decazella, Heyler 1967 [Palaeonisciformes]
  • Dechaseauxia [Hippuritida]
  • Dechenella, Kayser 1880 [Proetidae]
  • Dechenellurus, Maksimova 1960 [Proetida]
  • Decipia [Cephalopoda]
  • Decipilites [Hyolithida]
  • Decipula [Cardiida]
  • Deckera, Frederickson 1949 [Dokimocephalidae]
  • Deckerella [Palaeotextulariidae]
  • Deckerellina [Foraminifera]
  • Deckeroceras, Foerste 1935 [Apsidoceratidae]
  • Declinognathodus [Conodontophorida]
  • Declivolithus, Pribyl and Vanek 1967 [Trinucleidae]
  • Decorella [Palaeocopida]
  • Decoriconus [Conodontophorida]
  • Decorites, Ruzhencev and Bogoslovskaya 1975 [Homoceratidae]
  • Decoritheca, Syssoiev 1968 [Novitatidae]
  • Decoroproetus, Pribyl 1946 [Proetidae]
  • Decoropugnax [Innaechiidae]
  • Decoroscutellum, Snajdr 1958 [Styginidae]
  • Decurella [Cyclostomata]
  • Decurtaria [Cheilostomata]
  • Decurtella, Gaetani 1966 [Austrirhynchidae]
  • Decus, Pegel 1981 [Ptychopariida]
  • Dedzetina [Dalmanellidae]
  • Deefgella [Palaeocopida]
  • Deflandrella, Loeblich and Tappan 1961 [Spumellaria]
  • Deflandrellium, Cheng 1986 [Archocyrtiidae]
  • Defrancia, Alloiteau 1957 [Faviidae]
  • Defrancia [Frondiporidae]
  • Defranciopora [Cyclostomata]
  • Degamella, Marek 1961 [Cyclopygidae]
  • Degeletticyathus [Ajacicyathida]
  • Degrangia [Myoida]
  • Dehmicystis [Soluta]
  • Dehornella, Lecompte 1952 [Milleporellidae]
  • Deianira, Stolickza 1860 [Deianiridae]
  • Deiloceras [Discosorida]
  • Deinoceras [Discosorida]
  • Deiphon, Barrande 1846 [Cheiruridae]
  • Deiracephalus, Resser 1935 [Llanoaspididae]
  • Deiracorallium, Nelson 1963 [Streptelasmatidae]
  • Deiradovclavus, Conway Morris and Chen 1990 [Zhijinitidae]
  • Deiroceras, A. Hyatt 1884 [Ormoceratidae]
  • Deirosaurus, Owen 1854 [Nothosauridae]
  • Deirosteus, Wells 1942 [Arthrodira]
  • Dekayella [Trepostomida]
  • Dekayia [Trepostomida]
  • Delagnostus, Opik 1961 [Agnostida]
  • Delaria, Weller 1944 [Phillipsiidae]
  • Delecticeras [Clydoniceratidae]
  • Delectopecten, Stewart 1930 [Pectinidae]
  • Delepinea [Rugosochonetidae]
  • Delepinoceras, Miller and Furnish 1954 [Delepinoceratidae]
  • Delgadella, Walcott 1908 [Hebediscidae]
  • Delheidia [Hydrozoa]
  • Delia [Bivalvia]
  • Dellea, Wilson 1949 [Dokimocephalidae]
  • Delleana, Ivshin 1962 [Ptychopariida]
  • Delocare, Struve 1958 [Phacopida]
  • Delocidaris [Cidaroida]
  • Delocrinus, Miller and Gurley 1890 [Catacrinidae]
  • Deloia [Palaeocopida]
  • Delops, Rickards 1965 [Dalmanitidae]
  • Delosia, Gailite 1967 [Palaeocopida]
  • Delosites [Eunicemorpha]
  • Delphinites, Sayn 1901 [Neocomitidae]
  • Delphinosaurus, Merriam 1905 [Californosauridae]
  • Delphinulopsis, Laube 1868 [Delphinulopsidae]
  • Deltacare, Harrington and Leanza 1957 [Trilobita]
  • Deltacephalaspis, Eldredge and Ormiston 1979 [Calmoniidae]
  • Deltaclavus, Conway Morris and Chen 1990 [Zhijinitidae]
  • Deltacoleus [Turrilepadida]
  • Deltacrinus, Ulrich 1886 [Crinoidea]
  • Deltacystis [Pleurocystitidae]
  • Deltadechenella, Ormiston 1967 [Proetidae]
  • Deltadiscus [Isorophida]
  • Deltamya, Burmester 2004 [Pholadomyidae]
  • Deltentosteus, Gill 1863 [Perciformes]
  • Delthyris [Delthyrididae]
  • Deltina, Sunbe 1994 [Ptychopariida]
  • Deltoblastus, R. O. Fay 1961 [Schizoblastidae]
  • Deltoceras, Hyatt 1894 [Deltoceratidae]
  • Deltocyathus, Milne-Edwards and Haime 1848 [Caryophylliidae]
  • Deltocymatoceras, Kummel 1956 [Cymatoceratidae]
  • Deltodus, Morris and Roberts 1862 [Cochliodontidae]
  • Deltoideum, Rollier 1917 [Gryphaeidae]
  • Deltoidonautilus, Spath 1927 [Hercoglossidae]
  • Deltopecten [Deltopectinidae]
  • Deltoptychius, Morris and Roberts 1862 [Deltoptychiidae]
  • Deltospirifer [Reticulariidae]
  • Demarezites, Ruzhencev 1955 [Cyclolobidae]
  • Dembabaspira [Neotaenioglossa]
  • Demeterops, Pribyl and Vanek 1985 [Phacopida]
  • Deminucula, Iredale 1931 [Nuculidae]
  • Demirastrites [Graptoloidea]
  • Demirina [Foraminifera]
  • Democrinus, Perrier 1883 [Bathycrinidae]
  • Demoulia, Gray 1838 [Nassariidae]
  • Denaecyathus [Ajacicyathida]
  • Denagnostus, Jago 1987 [Diplagnostidae]
  • Denariocrinus, Schmidt 1942 [Cladida]
  • Denayphyllum, Merriam 1973 [Spongophyllidae]
  • Denckmannites, Wedekind 1911 [Phacopidae]
  • Dendostrea, Swainson 1835 [Ostreidae]
  • Dendracis, Milne-Edwards and Haime 1849 [Acroporidae]
  • Dendraraea, d'Orbigny 1849 [Microsolenidae]
  • Dendritina, d'Orbigny 1826 [Peneroplidae]
  • Dendrocircus [Nassellaria]
  • Dendroclonella [Demospongea]
  • Dendroconus (Swainson 1840) [Conidae]
  • Dendrocrinus, J. Hall 1852 [Dendrocrinidae]
  • Dendrocyathus, Okulitch and Roots 1947 [Archaeocyathida]
  • Dendrocystites, Barrande 1887 [Dendrocystitidae]
  • Dendrocystoides [Soluta]
  • Dendroecia [Cyclostomata]
  • Dendrofavosites, Rukhin 1937 [Favositidae]
  • Dendrograptus [Dendroidea]
  • Dendrogyra, Ehrenberg 1834 [Meandrinidae]
  • Dendroholmia, Spasskiy and Kravtsov 1974 [Holmophyllidae]
  • Dendroidea, order, Nicholson 1872 [Graptolithina]
  • Dendrophyllia, Blainville 1830 [Dendrophylliidae]
  • Dendrophyra [Rhizamminidae]
  • Dendrosmilia, Milne-Edwards and Haime 1848 [Caryophylliidae]
  • Dendrospyris, Haeckel 1881 [Triospyrididae]
  • Dendrostella, Glinski 1957 [Stauriidae]
  • Dendrostroma, Lecompte 1952 [Stromatoporellidae]
  • Dendrozoum, Fuchs 1915 [Micheliniidae]
  • Deneechinus [Lepidocentridae]
  • Denella, Ludvigsen and Chatterton 1982 [Phacopida]
  • Denemarkia, Pribyl 1946 [Tropidocoryphidae]
  • Dengalosia [Chonopectidae]
  • Dengyingoconus [Halkieriidae]
  • Deningeria, O. Wilckens 1937 [Solenolmiidae]
  • Denisonodus, Johnson and Elliott 1996 [Ptyctodontiformes]
  • Dennantia, Tate 1888 [Fasciolariidae]
  • Densalvus [Athyrididae]
  • Densastroma, Flügel 1959 [Densastromatidae]
  • Densepustula [Echinoconchidae]
  • Densiphrentis, Ivanovskiy 1963 [Streptelasmatidae]
  • Densiphyllum, Dybowski 1873 [Streptelasmatidae]
  • Densocyathus [Ajacicyathida]
  • Densonella, Shaw 1952 [Menomoniidae]
  • Dentachites [Problematica]
  • Dentacodina [Conodontophorida]
  • Dentalina, d'Orbigny 1826 [Lagenidae]
  • Dentalinella [Ichthyolariidae]
  • Dentalinoides [Nodosariidae]
  • Dentalinopsis [Nodosariidae]
  • Dentalitrya [Cyclostomata]
  • Dentallopoma [Archaeogastropoda]
  • Dentaloscutellum, Chatterton 1971 [Styginidae]
  • Dentatocoscinus [Ajacicyathida]
  • Dentex, Cuvier 1815 [Sparidae]
  • Denticrinus, Klikushin 1985 [Isocrinida]
  • Denticulites, Ljaschenko 1957 [Polycylindritidae]
  • Dentilasma, Ivanovskiy 1962 [Ketophyllidae]
  • Dentimargo, Cossmann 1899 [Marginellidae]
  • Dentiporella [Cheilostomata]
  • Dentiscala, de Boury 1886 [Epitoniidae]
  • Dentistyla [Archaeogastropoda]
  • Dentiterebra [Neogastropoda]
  • Dentoglobigerina, Blow 1979 [Globoquadrinidae]
  • Dentokrithe, Khosla and Haskins 1980 [Podocopida]
  • Dentonia, L. W. Stephenson 1953 [Corbiculidae]
  • Dentrimitra [Neogastropoda]
  • Deocrinus, Hudson 1907 [Diplobathrida]
  • Depaocrinus, Wanner 1937 [Cladida]
  • Depasophyllum, Grabau 1936 [Pycnostylidae]
  • Deprandus, Gilbert 1921 [Anguilliformes]
  • Depressiscala, de Boury 1909 [Neotaenioglossa]
  • Derbiocrinus, Wright 1951 [Cladida]
  • Derbyina [Meganterididae]
  • Derbyoides [Orthotetidae]
  • Dercetoides [Alepisauriformes]
  • Dereta [Terebrataliidae]
  • Dermatopsis, Ogilby 1896 [Ophidiiformes]
  • Dermatostroma, Parks 1910 [Lophiostromatidae]
  • Dermochelys, de Blainville 1816 [Testudines]
  • Dermomurex, Monterosato 1890 [Muricidae]
  • Dermosastraea, Beauvais 1970 [Scleractinia]
  • Dermoseris, Koby 1887 [Microsolenidae]
  • Dermosmilia, Koby 1884 [Dermosmiliidae]
  • Dermosmiliopsis, Alloiteau 1952 [Brachyphylliidae]
  • Dermosmiliopsis, Alloiteau 1952 [Brachyphylliidae]
  • Derolytoceras [Lytoceratidae]
  • Derstolida [Neotaenioglossa]
  • Dertonia [Neogastropoda]
  • Derventina [Hauerinidae]
  • Desatrypa [Karpinskiidae]
  • Desertospira () [Gosseletinidae]
  • Deshayesia [Neotaenioglossa]
  • Deshayesites, Kazansky 1914 [Deshayesitidae]
  • Desioceras, G. Cecioni 1953 [Eothinoceratidae]
  • Desistrophia [Amphistrophiidae]
  • Deslongchampsia, Morris and Lycett 1851 [Acmaeidae]
  • Desmatelesia [Cyclostomata]
  • Desmatochelys, Williston 1894 [Protostegidae]
  • Desmechinus [Temnopleuridae]
  • Desmediaperoecia [Diaperoeciidae]
  • Desmeplatioecia [Cyclostomata]
  • Desmepora [Cyclostomata]
  • Desmidocrinus, Angelin 1878 [Monobathrida]
  • Desmidopora, Nicholson 1886 [Desmidoporidae]
  • Desmiodus, St. John and Worthen 1875 [Chondrichthyes]
  • Desmoceras [Cephalopoda]
  • Desmoceras, Zittel 1884 [Desmoceratidae]
  • Desmochitina [Rhizopodea]
  • Desmocladia, Reuss 1874 [Faviidae]
  • Desmocoenia [Scleractinia]
  • Desmoderma, Schrammen 1937 [Callodictyonidae]
  • Desmograptus [Dendroidea]
  • Desmoinesia, R.D. Hoare 1960 [Productellidae]
  • Desmophyllites, Spath 1829 [Desmoceratidae]
  • Desmophyllum, Ehrenberg 1834 [Caryophylliidae]
  • Desmopora [Axinellida]
  • Desmoporella, Orvig 1971 [Ptyctodontida]
  • Desmorthis [Plectorthidae]
  • Desmoscaphites [Cephalopoda]
  • Desmospyris, Haeckel 1881 [Triospyrididae]
  • Desmostroma, Bol'shakova 1969 [Pseudolabechiidae]
  • Desorinassa [Neogastropoda]
  • Despujolsia, Neltner and Poctey 1949 [Redlichiida]
  • Desquamatia [Atrypidae]
  • Destombesia [Diploporita]
  • Deussenia, L. W. Stephenson 1941 [Melongenidae]
  • Deuteronectanebos [Problematica]
  • Deuterospira [Mayncinidae]
  • Deveonema, Kulczycki 1957 [Arthrodiriformes]
  • Devonamphistrophia [Amphistrophiidae]
  • Devonaria [Anopliidae]
  • Devonesteus [Dipteriformes]
  • Devonia [Cardiida]
  • Devoniotheca [Orthothecida]
  • Devonobactrites, Shimanskiy 1962 [Bactritidae]
  • Devonoblastus, I. G. Reimann 1935 [Spiraculata]
  • Devonocaris [Eocaridacea]
  • Devonocheilus, Shimanskiy 1962 [Archiacoceratidae]
  • Devonochonetes [Chonetidae]
  • Devonocidaris [Echinocystitoida]
  • Devonocoryphe [Proetida]
  • Devonodontochile, Snajdr 1985 [Phacopida]
  • Devonoproductus [Monticuliferidae]
  • Devonoproetus, Lutke 1990 [Proetida]
  • Devonopronorites, Bogoslovsky 1954 [Devonopronoritidae]
  • Devonospongia [Demospongea]
  • Devonosteus [Coelacanthiformes]
  • Dhosaites [Mayaitidae]
  • Dhrumaites [Clydoniceratidae]
  • Dhrumella [Foraminifera]
  • Diabolepis, Chang 1984 [Dipnotetrapodomorpha]
  • Diabolirhynchia [Eatoniidae]
  • Diabolocrinus, Wachsmuth and Springer 1897 [Diplobathrida]
  • Diacalymene, Kegel 1927 [Calymenidae]
  • Diacanthocapsa, Squinabol 1903 [Carpocaniidae]
  • Diacanthopora [Cheilostomata]
  • Diacoryphe, R. Richter and E. Richter 1951 [Proetidae]
  • Diacria, Gray 1847 [Cavoliniidae]
  • Diactoma [Parvivaccidae]
  • Diacyparia [Demospongea]
  • Diadema [Diadematidae]
  • Diademoceras, R. Flower 1945 [Rutoceratidae]
  • Diademodus, Harris 1951 [Phoebodontidae]
  • Diademopsis [Pedinidae]
  • Diadochoceras, Hyatt 1900 [Parahoplitidae]
  • Diaerecallus [Neotaenioglossa]
  • Diagoceras, Flower 1936 [Spyroceratidae]
  • Diagoniella, Rauff 1894 [Protospongiidae]
  • Diala, A. Adams 1861 [Dialidae]
  • Dialeptophyllum [Anthozoa]
  • Dialipina, Schultze 1968 [Palaeonisciformes]
  • Dialopsis, Cossmann 1888 [Diastomatidae]
  • Dialutocrinus, Wright 1955 [Monobathrida]
  • Dialyaster [Disasteridae]
  • Dialytostoma [Neotaenioglossa]
  • Diamantopora [Milleporina]
  • Diambonia, Cooper and Kindle 1936 [Leptestiidae]
  • Diambonioidea, Zeng 1987 [Grorudiidae]
  • Diamenocrinus, Oehlert 1892 [Diplobathrida]
  • Diamesopora [Cystoporata]
  • Diameza [Neotaenioglossa]
  • Diamphidiocystis [Mitrata]
  • Diancopora [Cheilostomata]
  • Diandongia, Rong 1974 [Botsfordiidae]
  • Diandongpetalichthys, Pan and Wang 1978 [Petalichthida]
  • Dianops, Richter 1923 [Phacopidae]
  • Dianulites [Trepostomida]
  • Diaphana, Brown 1827 [Diaphanidae]
  • Diaphanometopus, Schmidt 1881 [Phacopida]
  • Diaphelasma [Clarkellidae]
  • Diaphorocrinus, Eckert 1984 [Crinoidea]
  • Diaphragmus [Productidae]
  • Diaphus, Eigenmann 1890 [Myctophidae]
  • Diaphyodus, Schafhäutl 1863 [Perciformes]
  • Diaplectia, Hinde 1884 [Stellispongiidae]
  • Diaplococeras, A. Hyatt 1900 [Dinaritinae]
  • Diarthema [Neotaenioglossa]
  • Diartus, Sanfilippo and Riedel 1980 [Coccodiscidae]
  • Diaschophyllum, Semenoff-Tian-Chansky 1974 [Aulophyllidae]
  • Diasterofungia [Pharetronida]
  • Diastoloceras, Teichert and Glenister 1954 [Protocycloceratidae]
  • Diastoma, Deshayes 1850 [Diastomatidae]
  • Diastomella [Neotaenioglossa]
  • Diastoporina [Cyclostomata]
  • Diatinostoma [Neotaenioglossa]
  • Diatorocrinus, Wright 1955 [Monobathrida]
  • Diatrypesis [Neotaenioglossa]
  • Diaulax, Bell 1863 [Diaulacidae]
  • Diaziceras [Collignoniceratidae]
  • Diazipora [Trepostomida]
  • Diazoma [Ambocoeliidae]
  • Dibaphimitra [Neogastropoda]
  • Dibaphus [Neogastropoda]
  • Diberus [Mytilidae]
  • Diblasus, Lonsdale 1850 [Oculinidae]
  • Dibolachras, Foreman 1973 [Syringocapsidae]
  • Dibolbina, Ulrich and Bassler 1923 [Beyrichiidae]
  • Dibolbopisthia [Palaeocopida]
  • Dibrachiocrinus, Arendt 1968 [Cyrtocrinida]
  • Dibranchus, Peters 1876 [Lophiiformes]
  • Dibunophyllum, Thomson and Nicholson 1876 [Aulophyllidae]
  • Dibunostoma [Thalamoporellidae]
  • Dicamara [Meristidae]
  • Dicamaropsis [Meristidae]
  • Dicaulograptus [Graptoloidea]
  • Dicellograptus [Graptoloidea]
  • Dicellomus [Obolidae]
  • Diceras [Diceratidae]
  • Diceratobolbina [Palaeocopida]
  • Diceratocephalina, Maksimova 1962 [Acrocephalitidae]
  • Diceratocephalus, Lu 1954 [Diceratocephalidae]
  • Diceratograptus [Graptoloidea]
  • Diceratopora [Cheilostomata]
  • Diceratopyge, Troedsson 1937 [Ceratopygidae]
  • Dicerocardium, Stoppani 1856 [Dicerocardiidae]
  • Dicerocaris [Arthropoda]
  • Dicerodiscus, Chang 1974 [Agnostida]
  • Diceromyonia, Wang 1949 [Platyorthidae]
  • Dichelepyge, Harrinton and Leanza 1952 [Ceratopygidae]
  • Dichelodus, Giebel 1857 [Chondrichthyes]
  • Dichocaeniopsis, Alloiteau 1957 [Rhipidogyridae]
  • Dichocoenia, Milne-Edwards and Haime 1848 [Meandrinidae]
  • Dichocrinus, Munster 1839 [Dichocrinidae]
  • Dichodella [Conodontophorida]
  • Dichograptus [Graptoloidea]
  • Dichojerea [Demospongea]
  • Dichophyllia [Heterocorallia]
  • Dichospirifer [Cyrtospiriferidae]
  • Dichospiropora [Cyclostomata]
  • Dichostreblocrinus, Weller 1930 [Cladida]
  • Dichotomites, Koenen 1909 [Polyptychitidae]
  • Dichotomoceras [Perisphinctidae]
  • Dichotomosmilia [Scleractinia]
  • Dichotomosphinctes [Cephalopoda]
  • Dichotrypa [Hexagonellidae]
  • Dichozygopleura [Athyrididae]
  • Dicirrocrinus, Schmidt 1934 [Crinoidea]
  • Dickersonia [Cephalopoda]
  • Dickinsiella [Archaeogastropoda]
  • Dickinsonia, R. C. Sprigg 1947 [Erniettamorpha]
  • Dicoccura [Spumellaria]
  • Dicoelites [Belemnitida]
  • Dicoelospirifer [Ambocoeliidae]
  • Dicoelostrophia [Douvillinidae]
  • Dicolocapsa, Haeckel 1881 [Syringocapsidae]
  • Dicologlossa, Chabanaud 1927 [Pleuronectiformes]
  • Dicondylotreta, Me 1993 [Acrotretidae]
  • Diconomorpha [Neogastropoda]
  • Dicosmos [Naticopsidae]
  • Dicostella [Cephalopoda]
  • Dicranastrum, Haeckel 1881 [Myelastridae]
  • Dicranella [Palaeocopida]
  • Dicranoclonella, Schrammen 1937 [Corallistidae]
  • Dicranodesma [Leptonidae]
  • Dicranodonta, Woods 1899 [Cucullaeidae]
  • Dicranogmus, Hawle and Corda 1847 [Lichidae]
  • Dicranopeltis, Hawle and Corda 1847 [Lichidae]
  • Dicranopora [Cryptostomata]
  • Dicranurus, Conrad 1841 [Odontopleuridae]
  • Dicrenodus, Romanowski 1853 [Hybodontidae]
  • Dicricoconus, Fisher 1962 [Dicricoconidae]
  • Dicroa, Foreman 1975 [Parvivaccidae]
  • Dicroloma [Aporrhaidae]
  • Dicromyocrinus, Jaekel 1918 [Cromyocrinidae]
  • Dicrorygma [Podocopida]
  • Dictenocrinus, Jaekel 1918 [Cladida]
  • Dictocythere [Podocopida]
  • Dictuonia [Cheilostomata]
  • Dictyaraea, Reuss 1867 [Poritidae]
  • Dictyastrum [Spumellaria]
  • Dictyella, Kobayashi 1933 [Corynexochida]
  • Dictyites, Kobayashi 1936 [Corynexochida]
  • Dictyobolus [Elkaniidae]
  • Dictyocaris [Archaeostraca]
  • Dictyocephalus, Ehrenberg 1860 [Theoperidae]
  • Dictyoceras, Eichwald 1860 [Orthocerida]
  • Dictyoceratida, order [Demospongea]
  • Dictyoclostoidea [Schrenkiellidae]
  • Dictyoclostus [Productidae]
  • Dictyoconella [Foraminifera]
  • Dictyoconoides [Rotaliidae]
  • Dictyoconus [Orbitolinidae]
  • Dictyocoryne, Ehrenberg 1860 [Spongodiscidae]
  • Dictyocyathus [Archaeocyathida]
  • Dictyofavosites, Chernyshev 1951 [Favositidae]
  • Dictyokathina [Foraminifera]
  • Dictyomitra, Zittel 1876 [Archaeodictyomitridae]
  • Dictyomitrella [Parvicingulidae]
  • Dictyonella [Eichwaldiidae]
  • Dictyonema, Hall 1851 [Dendrograptidae]
  • Dictyonina, Cooper 1942 [Paterinidae]
  • Dictyonites [Paterinidae]
  • Dictyophimus [Nassellaria]
  • Dictyophyton [Reticulosa]
  • Dictyopleurus [Glyphocyphidae]
  • Dictyopodium [Nassellaria]
  • Dictyoprora, Haeckel 1881 [Artostrobiidae]
  • Dictyopsella [Dictyopsellidae]
  • Dictyopselloides [Foraminifera]
  • Dictyoptychus [Dictyoptychidae]
  • Dictyopyge, Egerton 1847 [Redfieldiidae]
  • Dictyorbitolina [Foraminifera]
  • Dictyoretmon [Fenestrata]
  • Dictyorhabdus [Reticulosa]
  • Dictyospongia, Hall and Clarke 1899 [Dictyospongiidae]
  • Dictyospyris [Nassellaria]
  • Dictyostrophia [Strophodontidae]
  • Dictyosycon [Archaeocyathida]
  • Dictyothyris, Douville 1880 [Dictyothyrididae]
  • Dictyothyropsis [Kingenidae]
  • Dictyotoxotis [Palaeocopida]
  • Dicyclina [Dicyclinidae]
  • Didactylum [Spumellaria]
  • Didianema, Woodring 1928 [Liotiidae]
  • Didimacar, Iredale 1939 [Arcidae]
  • Didontogaster [Phyllodocemorpha]
  • Didrepanon, Lane 1971 [Cheiruridae]
  • Didwudina, Ivshin 1962 [Ptychopariida]
  • Didymaspis, Lankester 1867 [Cephalaspidae]
  • Didymelasma [Parallelelasmatidae]
  • Didymoceras, Hyatt 1900 [Nostoceratidae]
  • Didymocyathus [Ajacicyathida]
  • Didymocyrtis, Haeckel 1862 [Coccodiscidae]
  • Didymograptellus [Graptoloidea]
  • Didymograptus, McCoy 1851 [Graptoloidea]
  • Didymoparcium [Tyronellidae]
  • Didymosella [Didymosellidae]
  • Didymosphaera [Demospongea]
  • Didymothyris [Athyrididae]
  • Didymotis, Gerhardt 1897 [Posidoniidae]
  • Diebelina [Podocopida]
  • Diedrothyris [Terebratellidae]
  • Dielasma [Dielasmatidae]
  • Dielasmella [Cryptonellidae]
  • Dielymella, Ulrich and Bassler 1931 [Indianidae]
  • Diemanosaukia, Jago and Corbett 1990 [Saukiidae]
  • Diempterus [Aporrhaidae]
  • Dienstina, Richter 1931 [Phacopidae]
  • Dientomochilus [Strombidae]
  • Dierespongia [Reticulosa]
  • Dierisma [Erymnariidae]
  • Diestoceras, A. F. Foerste 1924 [Diestoceratidae]
  • Diestosphecion [Pharetronida]
  • Diestothyris [Terebrataliidae]
  • Dietrichia [Cardiida]
  • Dietrichiella, Wenz 1938 [Acmaeidae]
  • Dieuryocrinus [Sagenocrinida]
  • Difficilicrinus, Fres et al. 1979 [Crinoidea]
  • Difunites (Glenister and Furnish 1978) [Medlicottiidae]
  • Digenuoceras, Foerste 1935 [Oncoceratidae]
  • Dightonia [Cheilostomata]
  • Digitaria, Wood 1853 [Astartidae]
  • Digitariopsis, Chavan 1952 [Astartidae]
  • Digitolabrum [Strombidae]
  • Digitophyllites, Zhao 1950 [Procarnitidae]
  • Digmocythere [Podocopida]
  • Dignagnostus, Khairullina 1975 [Agnostida]
  • Dignomia, Hall 1871 [Lingulidae]
  • Digonella [Zeilleriidae]
  • Digonoclisia, Yu et al. 1974 [Anthozoa]
  • Digonophyllum, Wedekind 1923 [Digonophyllidae]
  • Digonophyllum (Glossophyllum), Wedekind 1924 [Cyathophyllidae]
  • Digonophyllum (Mochlophyllum), Wedekind 1923 [Digonophyllidae]
  • Digonus, Guerich 1909 [Homalonotidae]
  • Digoria, Daniltshenko 1980 [Beryciformes]
  • Digrypos, Kobayashi 1940 [Asaphida]
  • Dihelictera, Copper 1995 [Atrypidae]
  • Dihogmochilina, Teichert 1937 [Isochilinidae]
  • Dikelocephalites, Sun 1935 [Pterocephaliidae]
  • Dikelocephalopsis, Poletaeva 1955 [Asaphida]
  • Dikelocephalus, D.D. Owen 1852 [Dikelocephalidae]
  • Dikelokephalina, Broegger 1996 [Hungaiidae]
  • Dikenaspis [Pteraspidomorphes]
  • Dilatilabrum, Cossmann 1904 [Strombidae]
  • Dilatobactrites [Anarcestida]
  • Dilatocrinus, Webster and Lane 1987 [Monobathrida]
  • Dilites [Hyolithomorpha]
  • Dilobella [Palaeocopida]
  • Diloma [Trochidae]
  • Dilophaspis [Archaeostraca]
  • Dilophosina [Sellithyrididae]
  • Dimelasma [Anthozoa]
  • Dimensionaequalirostrum [Pugnacidae]
  • Dimerella, Zittel 1870 [Dimerellidae]
  • Dimeroceras, J. J. Sepkoski 2002 [Dimeroceratidae]
  • Dimeroclymenia, Czarnocki 1989 [Biloclymeniidae]
  • Dimerocrinites, Phillips 1839 [Diplobathrida]
  • Dimeropyge, Opik 1937 [Dimeropygidae]
  • Diminovula, Iredale 1930 [Ovulidae]
  • Dimitobelus, Whitehouse 1925 [Dimitobelidae]
  • Dimorpha [Demospongea]
  • Dimorpharaea, de Fromentel 1861 [Microsolenidae]
  • Dimorphina [Foraminifera]
  • Dimorphinites [Morphoceratidae]
  • Dimorphites, E. Mojsisovics 1893 [Juvavitidae]
  • Dimorphocella [Cheilostomata]
  • Dimorphocellaria [Cheilostomata]
  • Dimorphoceras, A. Hyatt 1883 [Dimorphoceratidae]
  • Dimorphoceratoides, J. J. Sepkoski 2002 [Neodimorphoceratidae]
  • Dimorphocoenia, de Fromentel 1857 [Montlivaltiidae]
  • Dimorphoconus [Problematica]
  • Dimorphograptoides [Graptoloidea]
  • Dimorphograptus [Graptoloidea]
  • Dimorpholepis, Teixeira 1947 [Perleididae]
  • Dimorphophyllia, Reuss 1864 [Agariciidae]
  • Dimorphoplites [Hoplitidae]
  • Dimorphoseris, Duncan 1872 [Synastraeidae]
  • Dimorphosmilia, Tomes 1902 [Montlivaltiidae]
  • Dimorphostylus [Cheilostomata]
  • Dimorphotectus, Cossmann 1918 [Proconulidae]
  • Dimorphotoceras [Tibetitidae]
  • Dimya, Rouault 1850 [Dimyidae]
  • Dimyodon, Munier-Chalmas 1886 [Dimyidae]
  • Dinacrocrinus, Moore and Strimple 1969 [Monobathrida]
  • Dinardocrinus, Manni and Nicosia 1990 [Cyrtocrinida]
  • Dinarella [Dielasmatidae]
  • Dinarites, E. v. Mojsisovics 1882 [Dinaritidae]
  • Dinaspidella [Pteraspidomorphes]
  • Dinaxis, Dall 1895 [Architectonicidae]
  • Dindymene, Hawle and Corda 1847 [Encrinuridae]
  • Dinelops, Woodward 1907 [Anguilliformes]
  • Dinemagraptus [Graptoloidea]
  • Dinesus, Etheridge 1896 [Dinesidae]
  • Dingus [Mollusca]
  • Dinichthys, Newberry 1873 [Dinichthyidae]
  • Dinobolus, Hall 1871 [Trimerellidae]
  • Dinocardia, class [Problematica]
  • Dinocardium, Dall 1900 [Cardiidae]
  • Dinocystis, Bather 1898 [Edrioasteridae]
  • Dinomischus, Conway Morris 1977 [Problematica]
  • Dinomylostoma, Eastman 1906 [Arthrodiriformes]
  • Dinophyllum, Lindström 1882 [Streptelasmatidae]
  • Dinorthis, Hall and Clarke 1892 [Plaesiomyidae]
  • Dinoscolites [Phyllodocemorpha]
  • Dinostrophinx [Anthozoa]
  • Dinotocrinus, Kirk 1941 [Cladida]
  • Diochthofera [Orthidae]
  • Diodoceras, Hyatt and Zittel 1900 [Trigonoceratidae]
  • Diodochoceras [Cephalopoda]
  • Diodon, Linnaeus 1758 [Diodontidae]
  • Diodora, Gray 1821 [Fissurellidae]
  • Diogmopteron [Podocopida]
  • Diomedeoides, K. Fischer 1985 [Diomedeoididae]
  • Dionella [Cheilostomata]
  • Dionide, Barrande 1847 [Dionididae]
  • Dionidella, Prantl and Pribyl 1950 [Dionididae]
  • Dionites, E. v. Mojsisovics 1893 [Tibetitidae]
  • Diopatraites [Eunicemorpha]
  • Dioristella [Diplospirellidae]
  • Diorthelasma [Draboviidae]
  • Diorugoceras, Hyatt 1893 [Centroceratidae]
  • Diorychopora, Davis 1887 [Auloporidae]
  • Diotis [Pterioida]
  • Dioxycaris [Thylacocephala]
  • Diparelasma [Finkelnburgiidae]
  • Diparvapila, MacDonald 1998 [Pseudorotasphaeridae]
  • Dipentaspis, Opik 1967 [Damesellidae]
  • Dipharus, Clark 1923 [Agnostida]
  • Diphuicrinus, Moore and Plummer 1937 [Diphuicrinidae]
  • Diphyllospira [Hexactinosa]
  • Diphyphyllum, Lonsdale 1845 [Lithostrotionidae]
  • Diplacanthograptus [Graptoloidea]
  • Diplacanthopoma, Guenther 1887 [Ophidiiformes]
  • Diplacmoceras [Cephalopoda]
  • Diplacodus, Davis 1884 [Cochliodontidae]
  • Diplactura [Spumellaria]
  • Diplagnostus, Jaeckel 1909 [Diplagnostidae]
  • Diplaraea, Milaschewitsch 1876 [Haplaraeidae]
  • Diplasioceras [Cephalopoda]
  • Diplechinus [Stomechinidae]
  • Diplesioceras [Ammonitida]
  • Dipleura, Green 1832 [Homalonotidae]
  • Dipleurites [Pterioida]
  • Dipleuropyge, Lermontova 1951 [Asaphida]
  • Diploaspis [Diploaspididae]
  • Diploastrea, Matthai 1914 [Faviidae]
  • Diplobathrida, order [Crinoidea]
  • Diplobeisselina [Cheilostomata]
  • Diplobelus [Belemnitida]
  • Diploblastus, R. O. Fay 1961 [Spiraculata]
  • Diplocava [Cyclostomata]
  • Diplocercides [Coelacanthiformes]
  • Diplochaetetes, Weissermel 1913 [Acanthochaetetidae]
  • Diplochilus, Wöhrmann 1894 [Proconulidae]
  • Diplochone, Frech 1886 [Cystiphyllidae]
  • Diplocidaris [Diplocidaridae]
  • Diploclema [Cyclostomata]
  • Diplocoenia, Fromentel 1857 [Acroporidae]
  • Diploconcha [Serpulimorpha]
  • Diplocrinus, Doederlein 1912 [Isselicrinidae]
  • Diplocteniopsis, Zlatarski 1968 [Meandrinidae]
  • Diploctenium, Goldfuss 1827 [Meandrinidae]
  • Diplocyathellus [Ajacicyathida]
  • Diplocyma [Neotaenioglossa]
  • Diplodesmepora [Cyclostomata]
  • Diplodetus [Brissidae]
  • Diplodictyon [Lychniscosa]
  • Diplododella [Conodontophorida]
  • Diplodonta, Bronn 1831 [Ungulinidae]
  • Diploepora, Quenstedt 1879 [Proporidae]
  • Diplognathodus [Conodontophorida]
  • Diplognathus, Newberry 1878 [Arthrodira]
  • Diplograptus [Graptoloidea]
  • Diplogyra, Eguchi 1936 [Stylinidae]
  • Diplohelia, Milne-Edwards and Haime 1857 [Oculinidae]
  • Diplomeriza [Terebridae]
  • Diplomitra [Neogastropoda]
  • Diplomoceras, Hyatt 1900 [Diplomoceratidae]
  • Diplonorthis, Mitchell 1972 [Archaeorthidae]
  • Diplopetalopora [Cyclostomata]
  • Diplopholeous [Cheilostomata]
  • Diplophyllum, Hall 1851 [Acervulariidae]
  • Diploplegma [Spumellaria]
  • Diplopleura [Hexactinellida]
  • Diplopodia [Pseudodiadematidae]
  • Diploporaria [Acanthocladiidae]
  • Diploporaster, Mortensen 1950 [Schizasteridae]
  • Diploporita, class, Mller 1854 [Blastozoa]
  • Diplopsis [Palaeocopida]
  • Diploria, Milne-Edwards and Haime 1848 [Faviidae]
  • Diplorrhina, Hawle and Corda 1847 [Peronopsidae]
  • Diplorula [Cheilostomata]
  • Diplosalenia [Parasaleniidae]
  • Diploschiza, Conrad 1866 [Plicatulidae]
  • Diplosirenites, E. v. Mojsisovics 1893 [Trachyceratidae]
  • Diplosolen [Cyclostomata]
  • Diplosphaerina [Archaesphaeridae]
  • Diplospinella [Chancelloriida]
  • Diplospirella [Diplospirellidae]
  • Diplostenopora [Trepostomida]
  • Diplostoma [Pharetronida]
  • Diplostroma [Stromatoporoidea]
  • Diplotagma [Stomechinidae]
  • Diplotheca, Mathew 1885 [Diplothecidae]
  • Diplothecangia, Chevalier 1963 [Scleractinia]
  • Diplotremina [Duostominidae]
  • Diplotresis [Cheilostomata]
  • Diplotrypa [Trepostomida]
  • Dipnoides [Pteraspidomorphi]
  • Dipnorhynchus [Dipteriformes]
  • Dipodospyris [Nassellaria]
  • Dipterichthys, Arambourg 1967 [Perciformes]
  • Dipteriformes, order [Osteichthyes]
  • Dipteroblastus, J. Wanner 1940 [Phaenoschismatidae]
  • Dipteronotus, Egerton 1854 [Cleiothrolepididae]
  • Dipterophyllum, Roemer 1883 [Zaphrentoididae]
  • Dipterus [Dipteridae]
  • Diptyxiella [Heterostrophia]
  • Dipulus, Waite 1905 [Ophidiiformes]
  • Dipyrgotes, Opik 1967 [Ptychopariida]
  • Dipyrogotes [Odontopleurida]
  • Diraphora [Bohemiellidae]
  • Dircella [Neotaenioglossa]
  • Diretmus, Johnson 1864 [Beryciformes]
  • Dirinus, M' Coy 1844 [Brachiopoda]
  • Dirocerithium [Neotaenioglossa]
  • Dirrymoceras [Cephalopoda]
  • Disaraea, Fromentel 1861 [Microsolenidae]
  • Disaster [Disasteridae]
  • Disasteroida, order [Echinoidea]
  • Discamminoides [Haplophragmoiidae]
  • Discanomalina [Foraminifera]
  • Dischides, Jeffreys 1867 [Gadilidae]
  • Dischidognathus [Conodontophorida]
  • Discinella, Hall 1871 [Mobergellidae]
  • Discinisca, Gray 1840 [Disciniidae]
  • Discinocaris [Malacostraca]
  • Discinopsis, Hall and Clarke 1892 [Craniopsidae]
  • Discispongia, Kolb 1910 [Ancorinidae]
  • Discitoceras, Hyatt 1894 [Trigonoceratidae]
  • Discoactinoceras, Kobayashi 1927 [Huroniidae]
  • Discobasis [Heterostrophia]
  • Discoceras, Barrande 1867 [Discoceratidae]
  • Discoceratites, Schrammen 1928 [Ceratitidae]
  • Discocirris [Archaeogastropoda]
  • Discoclymenia, J. J. Sepkoski 2002 [Posttornoceratidae]
  • Discocoeila [Pharetronida]
  • Discocoenia, Tomes 1884 [Stylophyllidae]
  • Discocrinus, Peck 1943 [Roveacrinidae]
  • Discocyathus, Milne-Edwards and Haime 1848 [Caryophylliidae]
  • Discocyclina [Discocyclinidae]
  • Discocystis, Gregory 1897 [Agelacrinitidae]
  • Discocytis [Cyclostomata]
  • Discodermia, du Bocage 1869 [Theonellidae]
  • Discodermites [Demospongea]
  • Discofascigera [Frondiporidae]
  • Discoflustrellaria [Lunulitidae]
  • Discogenus [Archaeogastropoda]
  • Discograptus [Tuboidea]
  • Discogypsina [Foraminifera]
  • Discohelix, Dunker 1847 [Discohelicidae]
  • Discohoplites [Cephalopoda]
  • Discoidella [Polycopidae]
  • Discoides [Discoididae]
  • Discometra [Comatulida]
  • Discomiltha, Chavan 1952 [Lucinidae]
  • Discomyorthis [Rhipidomellidae]
  • Discophyllites, A. Hyatt 1900 [Discophyllitidae]
  • Discophyllum [Hydroida]
  • Discoporella, d'Orbigny 1852 [Cupuladriidae]
  • Discopsis [Neotaenioglossa]
  • Discoptychites, C. Diener 1916 [Sturiidae]
  • Discoramulina [Foraminifera]
  • Discorbinella [Discorbinellidae]
  • Discorbis [Discorbidae]
  • Discorbitina [Foraminifera]
  • Discorbitura, Margerel 1968 [Rotaliina]
  • Discorinopsis [Foraminifera]
  • Discorotalia [Foraminifera]
  • Discors [Cardiidae]
  • Discosaurus, J. Leidy 1851 [Elasmosauridae]
  • Discoscaphites, Meek 1870 [Scaphitidae]
  • Discosella [Cheilostomata]
  • Discosiphonella, Inai 1936 [Sebargasiidae]
  • Discosorida, order, Flower 1950 [Cephalopoda]
  • Discosorus, Hall 1852 [Discosoridae]
  • Discosparsa, d'Orbigny 1852 [Diastoporidae]
  • Discosphinctes [Cephalopoda]
  • Discosphinctoides [Cephalopoda]
  • Discospirina [Discospirinidae]
  • Discostroma, Zittel 1878 [Discostromatidae]
  • Discotectonica, Marwick 1931 [Architectonicidae]
  • Discotectus, Favre 1913 [Trochidae]
  • Discotheca [Archaeogastropoda]
  • Discotoma [Trochotomidae]
  • Discotreta, Ulrich and Cooper 1936 [Acrothelidae]
  • Discotrochus, Milne-Edwards 1848 [Fungiidae]
  • Discotrochus (Cylindrophyllia), Yabe and Eguchi 1937 [Turbinoliidae]
  • Discotruncatulipora [Cyclostomata]
  • Discotrypa [Trepostomida]
  • Discotrypina [Trepostomida]
  • Discotubigera [Cyclostomata]
  • Discouvermetulus [Serpulimorpha]
  • Discovibracella [Cheilostomata]
  • Disculcina [Palaeocopida]
  • Disculina [Chlidonophoridae]
  • Disculus, Deshayes 1863 [Architectonicidae]
  • Dishelopora [Cheilostomata]
  • Disjectopora, Waagen and Wentzel 1888 [Disjectoporidae]
  • Disoketa [Neotaenioglossa]
  • Disolenia [Spumellaria]
  • Disopontocypris [Podocopida]
  • Disparida, order, R.C. Moore and L.R. Laudon 1943 [Crinoidea]
  • Disparigonya [Palaeocopida]
  • Disparilia [Cardiida]
  • Disparistromaria [Axinellida]
  • Disphenoceras [Endocerida]
  • Disphyllia, He 1978 [Disphyllidae]
  • Disphyllum, Fromentel 1861 [Disphyllidae]
  • Displodocrinus, Webster and Lane 1987 [Monobathrida]
  • Disporella [Lichenoporidae]
  • Dissochilus [Neotaenioglossa]
  • Dissostoma [Neotaenioglossa]
  • Distansescharella [Cheilostomata]
  • Distazeris, Raymond 1937 [Catillicephalidae]
  • Distefanaster [Hemiasteridae]
  • Distefanella [Radiolitidae]
  • Distefanella [Cheilostomata]
  • Disteginopora [Cheilostomata]
  • Distichites, E. Mojsisovics 1893 [Distichitidae]
  • Distichoceras [Oppeliidae]
  • Distichomeandra, Cuif 1976 [Margarophylliidae]
  • Distichophyllia, Cuif 1974 [Reimaniphylliidae]
  • Distichopora [Stylasterina]
  • Distobolbina [Palaeocopida]
  • Distoloceras, Hyatt 1900 [Neocomitidae]
  • Distomodus [Conodontophorida]
  • Distorsio, Röding 1798 [Personidae]
  • Distorsio (Personella), Conrad 1865 [Ranellidae]
  • Distriactis [Spumellaria]
  • Distriatostylus, Lardeux 1969 [Undastriatostyliolinidae]
  • Distyrax, Lane 1988 [Encrinuridae]
  • Disulcatella, Fu Lipu 1982 [Virgianidae]
  • Disulcinoides [Palaeocopida]
  • Ditaxia [Cyclostomata]
  • Ditaxipora [Cheilostomata]
  • Ditaxiporina [Cheilostomata]
  • Dithecodendrum [Graptolithina]
  • Dithyrocaris [Archaeostraca]
  • Ditichia, Sandberger 1891 [Ctenodontidae]
  • Ditoecholasma, Simpson 1900 [Ditoecholasmatidae]
  • Ditomopyge [Phillipsiidae]
  • Ditrabs, Baumgartner 1980 [Tritrabidae]
  • Ditraenella [Hadromerida]
  • Ditremaster [Hemiasteridae]
  • Ditreta, Biernat 1973 [Acrotretidae]
  • Ditretus [Neotaenioglossa]
  • Ditrupa, Berkeley 1835 [Serpulidae]
  • Ditrupula [Serpulimorpha]
  • Dittmarites, E. v. Mojsisovics 1893 [Trachyceratidae]
  • Dittopora [Trepostomida]
  • Dittosaria [Pasytheidae]
  • Ditypodon [Cardiida]
  • Diura [Metacopida]
  • Divalinga, Chavan 1951 [Lucinidae]
  • Divalinga (Stchepinskya), Chavan 1951 [Lucinidae]
  • Divalucina, Iredale 1936 [Lucinidae]
  • Divaricardium [Cardiidae]
  • Divaricella, Martens 1880 [Lucinidae]
  • Divaricella (Egracina), Chavan 1951 [Lucinidae]
  • Divarikellia [Cardiida]
  • Diversiphyllum [Anthozoa]
  • Diversipora [Cyclostomata]
  • Diversograptus [Graptoloidea]
  • Dividuagnostus, Koroleva 1982 [Agnostida]
  • Divisosphinctes [Cephalopoda]
  • Dixieus [Phymosomatoida]
  • Dixiphopyge, Brezinski 1988 [Aulacopleuridae]
  • Dixonella [Hysterolitidae]
  • Dixonia [Discoididae]
  • Dizerina [Foraminifera]
  • Dizoniopsis [Neotaenioglossa]
  • Dizygocrinus, Wachsmuth and Springer 1897 [Monobathrida]
  • Dizygopleura [Platycopida]
  • Djurjuriceras [Cephalopoda]
  • Dmitria [Cyrtospiriferidae]
  • Dmitrispirifer [Mucrospiriferidae]
  • Dnestrina [Anoplothecidae]
  • Dnestroceras, Zhuravleva 1961 [Pseudorthoceratidae]
  • Dobrodgeiceras, Nikolov 1963 [Olcostephanidae]
  • Dobrogeites, Kittl 1908 [Megaphyllitidae]
  • Dobrogelina, Neagu 1979 [Foraminifera]
  • Dobrogimactra [Cardiida]
  • Dobrowlania, Stensiö 1944 [Acanthothoraciformes]
  • Docidoceras [Otoitidae]
  • Docomphala [Neotaenioglossa]
  • Dodecaactinella, Reif 1968 [Polyactinellidae]
  • Dodecaceria [Spiomorpha]
  • Doellocosmia [Neotaenioglossa]
  • Doescherella [Dimegelasmidae]
  • Doescherina [Hyolithida]
  • Dogdathyris [Athyrididae]
  • Dogdoa [Innaechiidae]
  • Dogielina [Hauerinidae]
  • Dogoriella [Palaeocopida]
  • Dohaia [Foraminifera]
  • Dohmiella, Lutke 1990 [Proetida]
  • Dohmophyllum, Wedekind 1923 [Ptenophyllidae]
  • Dokidocyathella [Ajacicyathida]
  • Dokidocyathus [Ajacicyathida]
  • Dokimocephalus, Walcott 1924 [Dokimocephalidae]
  • Dokophyllum, Wedekind 1927 [Ketophyllidae]
  • Dolabella, Lamarck 1801 [Anaspidea]
  • Dolatocrinus, S. S. Lyon 1857 [Melocrinidae]
  • Dolborella [Palaeocopida]
  • Dolerobasilicus, Harrington and Leanza 1942 [Asaphidae]
  • Doleroceras [Oncocerida]
  • Dolerocrinus, Prick 1983 [Crinoidea]
  • Doleroides, Cooper 1930 [Plectorthidae]
  • Dolerolenus, Leanza 1949 [Dolerolenidae]
  • Dolerolichia, Sdzuy 1962 [Redlichiida]
  • Dolerorthis, Schuchert and Cooper 1931 [Hesperorthidae]
  • Dolgaia, Walcott and Resser 1928 [Ptychopariida]
  • Dolgeuloma, Rozova 1963 [Eulomidae]
  • Dolichoagnostus, Pokrovskaya 1958 [Agnostida]
  • Dolichoblastus, A. Breimer and D. B. Macurda 1972 [Fissiculata]
  • Dolichocrinus, Loriol 1891 [Crinoidea]
  • Dolichocyathus [Cribricyathea]
  • Dolichoharpes, Whittington 1949 [Harpetidae]
  • Dolicholatirus, Bellardi 1884 [Fasciolariidae]
  • Dolichometopsis, Poulson 1927 [Dolichometopidae]
  • Dolichomocelypha [Problematica]
  • Dolichopteron [Pterioida]
  • Dolichopterus [Eurypterida]
  • Dolichoscapha, Kesling and Ehlers 1958 [Beyrichiidae]
  • Dolichoscaphoides [Palaeocopida]
  • Dolichosina [Terebratulidae]
  • Dolichozygus [Terebratulidae]
  • Dolichupis, Iredale 1930 [Triviidae]
  • Dolicrassea [Archaeogastropoda]
  • Doliella [Heterostrophia]
  • Doliocassis, Dall 1909 [Cassidae]
  • Doliocrinus, Warn 1982 [Crinoidea]
  • Doliodus, Traquair 1893 [Omalodontidae]
  • Doliognathus [Conodontophorida]
  • Dollfusia, Cossmann 1886 [Veneridae]
  • Dollocaris [Concavicarida]
  • Dollosaurus, Yakovlev 1901 [Mosasauridae]
  • Dollymae [Conodontophorida]
  • Dolocythere [Podocopida]
  • Dolocytheridea [Podocopida]
  • Dolomitella [Heterostrophia]
  • Doloresella [Tetralobulidae]
  • Dolorthoceras, Miller 1931 [Spyroceratidae]
  • Dolosella [Fischerinidae]
  • Domaszevicella [Palaeocopida]
  • Domatoceras, Hyatt 1891 [Grypoceratidae]
  • Dombarigloria, Ruzhencev and Bogoslovskaya 1971 [Neoglyphioceratidae]
  • Dombarites, Librovitch 1957 [Delepinoceratidae]
  • Dombarocanites, Ruzhencev 1949 [Prolecanitidae]
  • Domerginella [Neogastropoda]
  • Domeykos [Pachycormiformes]
  • Domfrontia [Cornuta]
  • Dominicotrochus, Wells 1937 [Caryophylliidae]
  • Dominina [Palaeocopida]
  • Domokhotia [Spiriferidae]
  • Donacoceras, Foerste 1925 [Orthocerida]
  • Donacophyllum, Dybowski 1873 [Kyphophyllidae]
  • Donacopsis [Cardiida]
  • Donacosmilia, Fromentel 1861 [Amphiastreidae]
  • Donalosia [Araksalosiidae]
  • Donella [Rhynchonellida]
  • Donellina [Palaeocopida]
  • Donetzites, Dampel 1940 [Cleistoporidae]
  • Donetzoceras, Librovitch 1946 [Wiedeyoceratidae]
  • Dongbaella [Dielasmatidae]
  • Dongbeiispirifer [Cyrtiidae]
  • Dongshanoceras [Ellesmerocerida]
  • Donispirifer, Poletaev 2000 [Spiriferida]
  • Donmacythere [Podocopida]
  • Donophyllum, Fomichev 1939 [Yatsengiidae]
  • Doraclatum [Palaeocopida]
  • Dorateuthis, Woodward 1883 [Teuthida]
  • Doratiopus [Decapoda]
  • Doratocythere [Podocopida]
  • Doratodus, Schmid 1861 [Hybodontiformes]
  • Dorcadospyris, Haeckel 1881 [Triospyrididae]
  • Dorcadungula [Pterioida]
  • Dordoniella [Podocopida]
  • Dordonophyllia, Alloiteau 1957 [Montlivaltiidae]
  • Doreckicrinus, Rasmussen 1961 [Isocrinida]
  • Doremataspis, Opik 1967 [Asaphida]
  • Dorfopterus [Eurypterida]
  • Dorikranites, A. Hyatt 1889 [Tirolitidae]
  • Dorippe, Weber 1795 [Dorippidae]
  • Dorispina [Ostracoda]
  • Dorlodotia, Salee 1920 [Lithostrotionidae]
  • Dornbuschia [Podocopida]
  • Dorocidaris, A. Agassiz 1869 [Cidaridae]
  • Dorothia [Valvulinidae]
  • Dorsanum, Gray 1847 [Buccinidae]
  • Dorsetensia [Sonniniidae]
  • Dorsirugatia [Productellidae]
  • Dorsisinus, Sanders 1958 [Rhynchonellida]
  • Dorsojugatus, Sysoyev 1968 [Dorsojugatidae]
  • Dorsolepis, Jorg 1969 [Palaeonisciformes]
  • Dorsolinevitus, Syssoiev 1958 [Sulcavitidae]
  • Dorsoplanites [Cephalopoda]
  • Dorsoplicathyris [Lissajousithyrididae]
  • Dorsoscyphus [Derbyiidae]
  • Dorvillea [Eunicemorpha]
  • Doryagnostus, Kobayashi 1939 [Spinagnostidae]
  • Doryblastus, R. O. Fay 1961 [Spiraculata]
  • Doryconthidium [Spumellaria]
  • Dorycrinus, Roemer 1854 [Monobathrida]
  • Doryderma, Zittel 1878 [Pleromatidae]
  • Dorydictyum [Spumellaria]
  • Dorydiscus [Spumellaria]
  • Dorydruppa [Spumellaria]
  • Dorylonchidium [Spumellaria]
  • Doryphacus [Spumellaria]
  • Doryplegma [Spumellaria]
  • Dorypyge, Dames 1883 [Dorypygidae]
  • Dorypygella, Walcott 1905 [Damesellidae]
  • Dorypygina, Lermontova 1940 [Dorypygidae]
  • Dorysphaera [Spumellaria]
  • Dorytreta [Sphenotretidae]
  • Dosidicus, Steenstrup 1857 [Teuthida]
  • Dosima [Cirripedia]
  • Dosina, Gray 1835 [Veneridae]
  • Dosinella [Cardiida]
  • Dosinia, Scopoli 1777 [Veneridae]
  • Dosinia (Dosinobia), Finlay and Marwick 1937 [Veneridae]
  • Dosinia (Kakahuia), Marwick 1927 [Veneridae]
  • Dosinia (Kereia), Marwick 1927 [Veneridae]
  • Dosinia (Raina), Marwick 1927 [Veneridae]
  • Dosiniopsella [Cardiida]
  • Dosiniopsis, Conrad 1864 [Veneridae]
  • Dosinorbis [Cardiida]
  • Dostia [Neritidae]
  • Douglasocaris [Arthropoda]
  • Douvillaster [Toxasteridae]
  • Douvilleia, Parnes 1988 [Cephalaspida]
  • Douvilleiceras, Grossouvre 1894 [Douvilleiceratidae]
  • Douvilletoma [Neotaenioglossa]
  • Douvillina [Douvillinidae]
  • Douvillinaria [Douvillinidae]
  • Douvillinella [Douvillinidae]
  • Douvillinoides [Douvillinidae]
  • Douvinella [Strophomenida]
  • Dowhatania [Productidae]
  • Dowlingoceras, Foerste 1928 [Diestoceratidae]
  • Doxander [Neotaenioglossa]
  • Dozyia [Cardiida]
  • Drabia, Wilson 1951 [Phylacteridae]
  • Drabodiscina, Havlicek 1972 [Trematidae]
  • Drabovia, Havlicek 1950 [Draboviidae]
  • Drabovinella [Draboviidae]
  • Drachiella, Guinot 1976 [Aethridae]
  • Dracius [Chlidonophoridae]
  • Dracolychnus [Lychniscosa]
  • Drahanorhynchus [Schuchertellidae]
  • Drahanostrophia [Areostrophiidae]
  • Drakonoceras [Discosorida]
  • Dreissenomya [Cardiida]
  • Drepanaspis [Pteraspidomorphes]
  • Drepanella [Palaeocopida]
  • Drepanellina, Ulrich and Bassler 1923 [Beyrichiidae]
  • Drepaniota [Foraminifera]
  • Drepanites, E. Mojsisovics 1893 [Tibetitidae]
  • Drepanocheilus [Aporrhaidae]
  • Drepanocheilus (Goniocheila), Gabb 1868 [Aporrhaidae]
  • Drepanochites [Siphogonuchitidae]
  • Drepanoconcho [Archaeogastropoda]
  • Drepanodus [Conodontophorida]
  • Drepanoistodus [Conodontophorida]
  • Drepanolepis [Furcacudiformes]
  • Drepanopterus [Drepanopteridae]
  • Drepanopyge, Lu 1961 [Redlichiida]
  • Drepanorhyncha, Cooper 1956 [Ancistrorhynchidae]
  • Drepanura, Bergeron 1899 [Damesellidae]
  • Drepanuroides, Chang 1966 [Redlichiida]
  • Dresbachia, Walcott 1916 [Menomoniidae]
  • Drevennia [Foraminifera]
  • Drevermannia, Schmidt 1909 [Proetidae]
  • Drevoella [Hydroida]
  • Drewerelasma [Anthozoa]
  • Drillia, Gray 1838 [Turridae]
  • Drilliola [Neogastropoda]
  • Drilluta, B. Wade 1916 [Fasciolariidae]
  • Drilomorpha, order [Polychaeta]
  • Drilonereis [Eunicemorpha]
  • Drimys [Alepisauriformes]
  • Drobna, Munster 1839 [Decapoda]
  • Droharhynchia [Hadrorhynchiidae]
  • Dromia, Weber 1795 [Dromiidae]
  • Dromilites, H. Milne-Edwards 1837 [Sphaerodromiidae]
  • Dromiopsis, Reuss 1858 [Dromiidae]
  • Droogerinella [Foraminifera]
  • Drosdoria [Stromatoporoidea]
  • Drosdovia [Porifera]
  • Drotops, Struve 1990 [Phacopida]
  • Druganirhynchia [Tetrarhynchiidae]
  • Druidwilsonia [Neotaenioglossa]
  • Drumaspis, Resser 1942 [Elviniidae]
  • Drummuckina [Strophomenidae]
  • Drumoceras, Wang and He 1976 [Thanamitidae]
  • Drupa, Röding 1798 [Thaididae]
  • Druppastylus [Spumellaria]
  • Druppatractus, Haeckel 1887 [Stylosphaeridae]
  • Druppocarpus [Spumellaria]
  • Druppula [Spumellaria]
  • Drydenius, Traquair 1890 [Palaeonisciformes]
  • Drymocrinus, Ulrich 1925 [Crinoidea]
  • Dryorhizopsis [Dryorhizopsidae]
  • Dryptoscolex [Phyllodocemorpha]
  • Duartea [Productidae]
  • Duashnoceras [Stephanoceratidae]
  • Dubarechinus [Orthopsidae]
  • Dubaria [Septatrypidae]
  • Dubertretia [Hippuritida]
  • Dubhglasina [Ptychopariida]
  • Dubioleptina [Sowerbyellidae]
  • Dubius [Cribricyathea]
  • Dubrovia, Zheltonogova 1961 [Ptenophyllidae]
  • Ducdonia, Leleshus 1974 [Proporidae]
  • Ductina, Richter 1931 [Phacopidae]
  • Dudleyaspis, F. Prantl and A. Pribyl 1949 [Odontopleuridae]
  • Dudu, Hahn 1985 [Proetida]
  • Duerleyoceras, Turner 1954 [Rutoceratidae]
  • Dufrenoya (Kilian and Reboul 1915) [Deshayesitidae]
  • Duftonia, Dean 1959 [Dalmanitidae]
  • Duibianaspis, Lu and Lin 1984 [Asaphida]
  • Duibianella [Ostracoda]
  • Dukhania [Foraminifera]
  • Dulankarella, Rukavishnikova 1956 [Leptellinidae]
  • Dulanocrinus [Crinoidea]
  • Dulcineaia [Modiomorphida]
  • Dulkumella [Palaeocopida]
  • Dulunomya [Pholadomyida]
  • Dumasella [Neotaenioglossa]
  • Dumontina [Podocopida]
  • Dumortieria [Hildoceratidae]
  • Dunbarinella [Schwagerinidae]
  • Dunbarula, Ciry 1948 [Schubertellidae]
  • Duncanella, Nicholson 1874 [Metriophyllidae]
  • Duncania, de Koninck 1872 [Anthozoa]
  • Duncaniaster [Holasteridae]
  • Duncanoclema [Cystoporata]
  • Duncanopora, Sando 1975 [Thecostegitidae]
  • Duncanopsammia, Wells 1936 [Dendrophylliidae]
  • Dunderbergella, Howell 1945 [Ptychopariida]
  • Dunderbergia, Walcott 1924 [Elviniidae]
  • Dundrythyris [Loboidothyrididae]
  • Dunedinites, E. T. Tozer 1963 [Proptychitidae]
  • Dungulia, Oppenheim 1930 [Caryophylliidae]
  • Dunkeria, Carpenter 1856 [Pyramidellidae]
  • Dunkleosteus, Newberry 1874 [Dunkleosteidae]
  • Dunleithoceras, Foerste 1924 [Oncoceratidae]
  • Dunnicrinus, Moore 1967 [Isocrinida]
  • Dunsopterus [Eurypterida]
  • Dunveganoceras, Warren and Stelck 1940 [Acanthoceratidae]
  • Duodecimedusina [Medusae]
  • Duostomina, Kristan-Tollmann 1960 [Duostominidae]
  • Duotaxis [Verneuilinidae]
  • Duperieria [Holectypoida]
  • Duplella [Foraminifera]
  • Duplexibollia [Palaeocopida]
  • Duplicristatia [Palaeocopida]
  • Duplipecten, Marwick 1928 [Pectinidae]
  • Dupliporocyathus [Ajacicyathida]
  • Duplocarinia [Anthozoa]
  • Duplophyllum, Koker 1924 [Hapsiphyllidae]
  • Duplora, Shergold 1972 [Eulomidae]
  • Durangites [Himalayitidae]
  • Durania, Douvill 1908 [Radiolitidae]
  • Durga [Hippuritida]
  • Durhamella [Clypeasteroida]
  • Duringia [Palaeocopida]
  • Durinia, Robison 1988 [Lonchocephalidae]
  • Durotrigensia [Parkinsoniidae]
  • Durvilleoceras [Meekoceratidae]
  • Duryeella [Spinocyrtiidae]
  • Dusa, Munster 1839 [Decapoda]
  • Dushanirhynchia [Trigonirhynchiidae]
  • Dushanophrentis, Yü et al. 1974 [Disphyllidae]
  • Duslia [Arthropoda]
  • Dutkevichella [Foraminifera]
  • Dutkevitchites, Davydov 1984 [Schubertellidae]
  • Dutoitella [Podocopida]
  • Duvalia, Bayle 1878 [Duvaliidae]
  • Duvergiera [Cheilostomata]
  • Dvorakia [Conodontophorida]
  • Dwightoceras, Ulrich and Foerste 1936 [Bassleroceratidae]
  • Dwortsowaecrinus, Stukalina 1967 [Crinoidea]
  • Dwykia, Gardiner 1969 [Palaeonisciformes]
  • Dyasma [Pholadomyida]
  • Dybowskinia, Weyer 1973 [Lambelasmatidae]
  • Dybowskites [Trepostomida]
  • Dyfrondicularia [Foraminifera]
  • Dymia [Foraminifera]
  • Dynatoceras [Discosorida]
  • Dyocibicides [Cibicididae]
  • Dyoconia [Pharetronida]
  • Dyocopanon [Pharetronida]
  • Dyoidophragma [Trepostomida]
  • Dyreaspis [Pteraspidomorphes]
  • Dyrosaurus, Pomel 1894 [Dyrosauridae]
  • Dyscheiloceras, Schmidt 1922 [Cheiloceratidae]
  • Dyscolia [Dyscoliidae]
  • Dyscritella [Dyscritellidae]
  • Dyscritellina [Dyscritellidae]
  • Dyscritoceras, Ulrich and Foerste 1936 [Bassleroceratidae]
  • Dyscritothyris [Capillithyrididae]
  • Dysidea [Dictyoceratida]
  • Dysnoetocella [Cheilostomata]
  • Dysnoetopla [Mollusca]
  • Dysnoetopora [Cheilostomata]
  • Dysondonta [Nuculida]
  • Dysoristus, Bell in Lochman and Duncan 1941 [Dysoristidae]
  • Dysplanus, Burmeister 1843 [Illaenidae]
  • Dysprosorthis, Rong 1984 [Chrustenoporidae]
  • Dystactella, Hall and Whitfield 1872 [Ctenodontidae]
  • Dystactocrinus, Ulrich 1925 [Crinoidea]
  • Dystactospongia, Miller 1882 [Dystactospongiidae]
  • Dyticospirifer [Hysterolitidae]
  • Dytremacephalus, Palmer 1955 [Elviniidae]
  • Dzhangirhynchia [Basiliolidae]
  • Dzhaprakoceras, Popov 1965 [Maxigoniatitidae]
  • Dzhebaglina [Strophomenidae]
  • Dzhinsetoceras [Nautilida]
  • Dzhulfoceras, Ruzhencev 1962 [Araxoceratidae]
  • Dzieduszyckia [Peregrinellidae]
  • Dzirulina [Kingenidae]
  • Eamesiella [Cardiida]
  • Earlachitina [Rhizopodea]
  • Earlandia [Earlandiidae]
  • Earlandinella [Foraminifera]
  • Earlandinita [Earlandinitidae]
  • Easchmidtella [Palaeocopida]
  • Eastmanalepes, Bannikov 1984 [Perciformes]
  • Eatonia [Eatoniidae]
  • Eatoniella, Dall 1876 [Eatoniellidae]
  • Eatonioides [Eatoniidae]
  • Ebala, Gray 1847 [Pyramidellidae]
  • Ebalia, Leach 1817 [Leucosiidae]
  • Ebetallites [Polychaeta]
  • Ebianella [Mollusca]
  • Ebianotheca [Orthothecida]
  • Eblanaia [Foraminifera]
  • Ebocotrochus, Barta-Calmus 1970 [Scleractinia]
  • Eboraciceras [Cardioceratidae]
  • Eboroceras [Cephalopoda]
  • Ebrayia, Ferry 1870 [Scleractinia]
  • Ebrayiceras [Morphoceratidae]
  • Eburna, Lamarck 1801 [Olividae]
  • Eburneotrochus, Barta-Calmus 1970 [Scleractinia]
  • Eburnopsis, Tate 1889 [Buccinidae]
  • Eburoceras [Ellesmerocerida]
  • Ecblastesia, Rauff 1933 [Craticulariidae]
  • Eccaparadoxides, Snajdr 1957 [Paradoxididae]
  • Eccentricosta [Strophochonetidae]
  • Ecclimadictyon, Nestor 1964 [Actinodictyidae]
  • Eccliseogyra [Neotaenioglossa]
  • Eccoptochile, Hawle and Corda 1847 [Cheiruridae]
  • Eccoptochiloides, Prantle and Pribyl 1948 [Phacopida]
  • Ecdyceras, Flower 1941 [Hebetoceratidae]
  • Echelus, Rafinesque 1810 [Anguilliformes]
  • Echicrinus [Isocrinida]
  • Echidnina, Bengtson 1986 [Echidninidae]
  • Echidnocephalus, Marck 1858 [Actinopterygii]
  • Echigoina [Foraminifera]
  • Echigophyllum, Yabe and Hayasaka 1924 [Aulophyllidae]
  • Echinalosia [Strophalosiidae]
  • Echinaria [Echinoconchidae]
  • Echinauris, Muir-Wood and Cooper 1960 [Productellidae]
  • Echinellopsis [Neotaenioglossa]
  • Echinimathilda [Neotaenioglossa]
  • Echininus, Clench and Abbott 1942 [Gastropoda]
  • Echinirhynchia, Childs 1969 [Acanthothirididae]
  • Echinobathra [Neotaenioglossa]
  • Echinocardium, Gray 1825 [Loveniidae]
  • Echinocaris [Archaeostraca]
  • Echinocava [Cyclostomata]
  • Echinochimaera, Lund 1977 [Echinochimaeridae]
  • Echinocoelia [Ambocoeliidae]
  • Echinocoeliopsis [Reticulariidae]
  • Echinoconchella [Echinoconchidae]
  • Echinoconchus [Echinoconchidae]
  • Echinocyamus [Fibulariidae]
  • Echinocyphus [Phymosomatoida]
  • Echinocyphus [Temnopleuridae]
  • Echinocystites [Echinocystitidae]
  • Echinocythereis, Puri 1953 [Hemicytheridae]
  • Echinodus, Davis 1884 [Ctenacanthiformes]
  • Echinoencrinites, Meyer 1826 [Echinoencrinitidae]
  • Echinogalerus [Holectypoida]
  • Echinognathus [Eurypterida]
  • Echinoida, order, Troschel 1872 [Echinoidea]
  • Echinolampas, Gray 1825 [Echinolampadidae]
  • Echinolichas, Guerich 1901 [Lichidae]
  • Echinomma [Spumellaria]
  • Echinopecten [Pterioida]
  • Echinopedina [Pedinidae]
  • Echinophacops, Zhou 1983 [Phacopida]
  • Echinophoria, Sacco 1890 [Cassidae]
  • Echinophyllia, Klunzinger 1879 [Pectiniidae]
  • Echinopora, Lamarck 1816 [Faviidae]
  • Echinoporina [Foraminifera]
  • Echinoprimitia [Palaeocopida]
  • Echinopsis, Agassiz 1840 [Orthopsidae]
  • Echinopyge, Haas 1968 [Phacopida]
  • Echinorhinus [Echinorhinidae]
  • Echinosphaerites, Wahlenberg 1818 [Echinosphaeritidae]
  • Echinospirifer [Echinospiriferidae]
  • Echinostrephus [Echinoida]
  • Echinothuria [Echinothuriidae]
  • Echinoturris [Neogastropoda]
  • Echioceras [Echioceratidae]
  • Echioceratoides [Echioceratidae]
  • Echiodon, Thompson 1837 [Carapidae]
  • Echiurida, phylum [Chaetifera]
  • Echmatocrinida, order [Crinoidea]
  • Echyropora, Tong-Dzuy 1964 [Parastriatoporidae]
  • Eclipes, Jordan and Gilbert 1919 [Gadiformes]
  • Eclusia [Foraminifera]
  • Ecnomocaris [Emeraldellida]
  • Econgella [Foraminifera]
  • Ecphora, Conrad 1843 [Muricidae]
  • Ecphorosycon [Neogastropoda]
  • Ectasis, Jordan and Gilbert 1919 [Elopiformes]
  • Ectenaspis, Raymond 1920 [Asaphida]
  • Ectenoceras, Ulrich and Foerste 1936 [Ellesmeroceratidae]
  • Ectenocrinus, Miller 1889 [Homocrinidae]
  • Ectenodesma, Hall 1883 [Pterineidae]
  • Ectenodictya [Reticulosa]
  • Ectenoglossa [Obolidae]
  • Ectenolites, Ulrich and Foerste 1935 [Ellesmeroceratidae]
  • Ectenonotus, Raymond 1920 [Pliomeridae]
  • Ectillaenus, Salter 1867 [Illaenidae]
  • Ectinechinus [Lepidocentridae]
  • Ectinochilus, Cossmann 1889 [Aporrhaidae]
  • Ectocentrites [Pleuroacanthitidae]
  • Ectochoristites [Spiriferidae]
  • Ectocrinus, Wright 1955 [Monobathrida]
  • Ectocycloceras, Ulrich and Foerste 1936 [Protocycloceratidae]
  • Ectocyrtoceras, Foerste 1930 [Acleistoceratidae]
  • Ectolcites, E. v. Mojsisovics 1893 [Distichitidae]
  • Ectonocorys, Foreman 1968 [Theoperidae]
  • Ectoprimitia [Palaeocopida]
  • Ectoprimitioides [Palaeocopida]
  • Ectorensselandia [Stringocephalidae]
  • Eczematolepis, Miller 1892 [Ptyctodontida]
  • Edaphaspis [Pteraspidomorphes]
  • Edaphoceras, Hyatt 1884 [Koninckioceratidae]
  • Edaphodon, Buckland 1838 [Callorhinchidae]
  • Edaphophyllum, Simpson 1900 [Cystiphyllidae]
  • Edapocrinus, Wright 1935 [Cladida]
  • Edelsteinaspis, Lermontova 1940 [Edelsteinaspididae]
  • Edelsteinia [Stromatoporoidea]
  • Edenoceras [Oncocerida]
  • Edenopsis [Palaeocopida]
  • Edganocare [Trilobita]
  • Edhemia [Foraminifera]
  • Ediacaria, Sprigg 1947 [Scyphozoa]
  • Edithaella [Foraminifera]
  • Edithais [Neogastropoda]
  • Edithiella, Kurtz 1975 [Ptychopariida]
  • Editia [Podocopida]
  • Edmundites, C. Diener 1916 [Trachyceratidae]
  • Edomia [Soritidae]
  • Edreja, Koneva 1979 [Botsfordiidae]
  • Edrioaster, Billings 1858 [Edrioasteridae]
  • Edrioasterida, order, Bell 1976 [Edrioasteroidea]
  • Edrioasteroidea, class, Billings 1858 [Echinodermata]
  • Edriocrinus, Hall 1858 [Crinoidea]
  • Edriodiscus [Isorophida]
  • Edriophus [Edrioasterida]
  • Edriospongia, Ulrich and Everett 1889 [Streptosolenidae]
  • Edwardsomeandra, Beauvais 1965 [Scleractinia]
  • Edwardsoseris, Alloiteau 1946 [Synastraeidae]
  • Edwardsosmilia, Alloiteau 1949 [Montlivaltiidae]
  • Effeminatopleura [Palaeocopida]
  • Egdetheca [Allathecidae]
  • Egenacythere [Podocopida]
  • Egerea, Gábor 1936 [Cancellariidae]
  • Egerella [Cardiida]
  • Egertonia, Cocchi 1866 [Phyllodontidae]
  • Egesta [Veneridae]
  • Egestas, Finlay 1926 [Turbinellidae]
  • Eggerella [Valvulinidae]
  • Eggerellina [Verneuilinidae]
  • Eggerina [Foraminifera]
  • Egilina [Heterostrophia]
  • Eglisia, Gray 1847 [Epitoniidae]
  • Eglonaspis [Pteraspidomorphes]
  • Egorovella [Palaeocopida]
  • Egorovia [Podocopida]
  • Egorovitina [Podocopida]
  • Egorvellina [Palaeocopida]
  • Egosiella, Dubatolov 1955 [Pachyporidae]
  • Egotistica, Marwick 1934 [Buccinidae]
  • Egrabensiceras [Cephalopoda]
  • Egrona [Cardiida]
  • Egyngolia, Korobov 1980 [Agnostida]
  • Ehlersella [Stricklandiidae]
  • Ehlersia [Palaeocopida]
  • Ehlersoceras, Foerste 1932 [Oncoceratidae]
  • Ehmania, Resser 1935 [Alokistocaridae]
  • Ehmaniella, Resser 1937 [Alokistocaridae]
  • Ehrenbergina [Foraminifera]
  • Eichstaettia, Arratia 1987 [Elopiformes]
  • Eichwaldia [Eichwaldiidae]
  • Eichwaldictya [Cryptostomata]
  • Eichwaldoceras, Balashov 1955 [Estonioceratidae]
  • Eifelatrypa [Carinatinidae]
  • Eifeloceras, Foerste 1929 [Pseudorthoceratidae]
  • Eifelocrinus, Wanner 1916 [Cladida]
  • Eiffelia, Walcott 1920 [Eiffeliidae]
  • Eifliarges, Richter 1917 [Lichida]
  • Eifyris [Athyrididae]
  • Eigilia, Kazantzeva-Selezneva 1977 [Palaeonisciformes]
  • Eilotreta [Triplesiidae]
  • Eilura, Resser and Endo 1935 [Solenopleuridae]
  • Eirelithus, Lamont 1941 [Asaphida]
  • Eireocrinus, Wright 1951 [Decadocrinidae]
  • Eirmocrinus, Strimple and Watkins 1969 [Cladida]
  • Eisenackitina [Rhizopodea]
  • Eisenackograptus [Graptoloidea]
  • Eisobairdia [Bairdiidae]
  • Ejinaspis, Lu and Zhou 1986 [Ptychopariida]
  • Ejnespirifer [Cyrtiidae]
  • Ekalakia, G. Bishop 1976 [Glaessneropsidae]
  • Ekaterdonta [Arcida]
  • Ekstadia, Soot-Ryen 1964 [Malletiidae]
  • Ektyphocythere [Protocytheridae]
  • Ekvasophyllum, Parks 1951 [Ekvasophyllidae]
  • Ekwanoceras, Foerste and Savage 1927 [Oncoceratidae]
  • Ekwipagetia, Frtitz 1973 [Yukoniidae]
  • Elachorbis [Neotaenioglossa]
  • Elachychiton [Neoloricata]
  • Elaeacrinus, C. F. Roemer 1851 [Spiraculata]
  • Elaeocyma [Neogastropoda]
  • Elankaspis, Egorova 1976 [Corynexochida]
  • Elaphoceras [Discosorida]
  • Elaphopora [Cyclostomata]
  • Elasma [Lychniscosa]
  • Elasmalimus [Demospongea]
  • Elasmaspis, Kramarenko 1956 [Phacopida]
  • Elasmatium [Bivalvia]
  • Elasmocoelia [Pharetronida]
  • Elasmocoenia, Milne-Edwards and Haime 1851 [Heterocoeniidae]
  • Elasmodectes, Woodward 1888 [Chimaeridae]
  • Elasmofungia, Alloiteau 1957 [Haplaraeidae]
  • Elasmogyra, Beauvais 1982 [Agariciidae]
  • Elasmoierea [Stellispongiidae]
  • Elasmophyllia, d'Achiardi 1875 [Montlivaltiidae]
  • Elasmophyllum, Hall 1882 [Anthozoa]
  • Elasmostoma, Fromentel 1860 [Stellispongiidae]
  • Elasmothyris [Linoporellidae]
  • Elatioriella [Heterostrophia]
  • Elatius, Orlowski 1985 [Ptychopariida]
  • Eldenosteus, Miles 1975 [Arthrodiriformes]
  • Elder [Mysidacea]
  • Elderra [Terebratellidae]
  • Eldoradia, Resser 1935 [Ptychopariida]
  • Eldroceras [Actinocerida]
  • Elea, d'Orbigny 1853 [Eleidae]
  • Electra, Lamouroux 1816 [Electridae]
  • Electroma, Stoliczka 1871 [Pteriidae]
  • Electrona, Goode and Bean 1895 [Myctophidae]
  • Eleganella [Heterostrophia]
  • Elegantaspis, Ivshin 1962 [Aphelaspididae]
  • Eleganticeras [Hildoceratidae]
  • Elegantilites [Hyolithida]
  • Elegantiscala, deBoury 1911 [Epitoniidae]
  • Elegantula, de Gregario 1884 [Semelidae]
  • Eleganuculana [Nuculanidae]
  • Elegesta [Proschizophoriidae]
  • Elegestina, Pokrovskaya 1959 [Redlichiida]
  • Elegestolepis, Karatajute-Talimaa 1973 [Chondrichthyes]
  • Elenamarginia [Palaeocopida]
  • Elenchus [Martiniidae]
  • Elenella [Foraminifera]
  • Elephantanellum, Barsch 1920 [Caecidae]
  • Elephantaria, Oppenheim 1930 [Actinacididae]
  • Elergella [Foraminifera]
  • Eleusoceras, Flower 1938 [Brevicoceratidae]
  • Eleutherocaris [Archaeostraca]
  • Eleutherocentrus, Clark 1935 [Bathyuridae]
  • Eleutherocrania, von Huene 1899 [Acrotretida]
  • Eleutherocrinus, B. F. Shumard and L. P. Yandell 1856 [Spiraculata]
  • Eleutherokomma [Mucrospiriferidae]
  • Elganellus, Suvorova 1958 [Redlichiida]
  • Elhasaella [Foraminifera]
  • Eliasopora [Ascodictyidae]
  • Elibatocrinus, Moore 1940 [Blothrocrinidae]
  • Elicicola, Jel and Runnegar 1990 [Yunnanocephalidae]
  • Elicrinus, Prokop 1973 [Cladida]
  • Eligmoloxus [Neotaenioglossa]
  • Eligmus, Eudes-Deslongchampes 1856 [Malleidae]
  • Elioserolis [Isopoda]
  • Elita [Elythidae]
  • Eliva [Spiriferidae]
  • Elivella [Martiniidae]
  • Elivina, Fredericks 1924 [Spiriferellidae]
  • Elkanaspis, Ludvigson 1982 [Remopleurididae]
  • Elkania, Ford 1886 [Elkaniidae]
  • Elkanisca, Havlicek 1982 [Elkaniidae]
  • Elkanoceras [Discosorida]
  • Elkanospina [Chancelloriida]
  • Elkia, Walcott 1924 [Asaphida]
  • Ella [Brachythyrididae]
  • Ellatrivia [Neotaenioglossa]
  • Elleria [Xiphosurida]
  • Elleriprion [Eunicemorpha]
  • Ellesicrusta [Crustoidea]
  • Ellesmerelasma [Anthozoa]
  • Ellesmerina [Podocopida]
  • Ellesmeroceras, Foerste 1921 [Ellesmeroceratidae]
  • Ellicea, Finlay 1928 [Buccinidae]
  • Ellinoceras, Balashov 1960 [Actinoceratidae]
  • Elliottina [Thecidellinidae]
  • Ellipsactinia [Axinellida]
  • Ellipsechinus [Echinoida]
  • Ellipsella [Palaeocopida]
  • Ellipsidium [Spumellaria]
  • Ellipsobulimina [Foraminifera]
  • Ellipsocephaloides, Kobayashi 1935 [Ellipsocephaloididae]
  • Ellipsocephalus, Zenker 1833 [Ellipsocephalidae]
  • Ellipsocoenia, d'Orbigny 1850 [Latomeandridae]
  • Ellipsocristellaria [Foraminifera]
  • Ellipsocyathus, d'Orbigny 1849 [Anthozoa]
  • Ellipsodimorphina [Foraminifera]
  • Ellipsoglandulina [Foraminifera]
  • Ellipsoidastraea, Alloiteau 1957 [Conophyllidae]
  • Ellipsoidella [Foraminifera]
  • Ellipsoidina [Foraminifera]
  • Ellipsolingulina [Foraminifera]
  • Ellipsopolymorphina [Foraminifera]
  • Ellipsoscapha, L. W. Stephenson 1941 [Scaphandridae]
  • Ellipsosmilia, d'Orbigny 1849 [Montlivaltiidae]
  • Ellipsostrenua, Kautsky 1945 [Ptychopariida]
  • Ellipsostylus [Spumellaria]
  • Ellipsotaphrus, Whittard 1952 [Cyclopygidae]
  • Ellipsoxiphus, Dunikowski 1882 [Pantanelliidae]
  • Ellipsuella, Hupe 1960 [Trilobita]
  • Ellipticoblastus, R. O. Fay 1960 [Spiraculata]
  • Elliptocephala [Holmiidae]
  • Elliptocyprites [Podocopida]
  • Elliptoglossa [Obolidae]
  • Elliptoidea [Bivalvia]
  • Elliptoseris, Duncan 1880 [Agariciidae]
  • Elliptostrophia [Rafinesquinidae]
  • Elliptotellina, Cossmann 1886 [Tellinidae]
  • Elliptovermetus [Neotaenioglossa]
  • Ellisella [Volborthellida]
  • Ellisella [Euomphalina]
  • Ellisina [Calloporidae]
  • Ellisinidra [Cheilostomata]
  • Ellisonia [Ellisoniidae]
  • Ellopetalichthys, Orvig 1957 [Petalichthida]
  • Ellsaspis, Rasetti 1945 [Trilobita]
  • Elmaria [Stringocephalidae]
  • Elminius [Cirripedia]
  • Elmosaurus, Huene 1957 [Nothosauridae]
  • Elobiceras, Spath 1921 [Brancoceratidae]
  • Elofsonella [Podocopida]
  • Elofsonia [Podocopida]
  • Elongatanileus, Ji 1986 [Asaphida]
  • Elongobula, Finlay 1939 [Buliminoididae]
  • Elonichthys, Giebel 1848 [Elonichthyidae]
  • Elopiformes, order, Sauvage 1875 [Actinopteri]
  • Elopopsis [Elopidae]
  • Elpasocrinus, Sprinkle and Wahlm 1994 [Cladida]
  • Elpezoe [Myodocopida]
  • Elphidiella [Foraminifera]
  • Elphidioides [Foraminifera]
  • Elphidium, Monfort 1808 [Elphidiidae]
  • Elpidocrinus, Strimple 1963 [Diplobathrida]
  • Elpinella [Myodocopida]
  • Elpisoceras [Discosorida]
  • Elrathia, Walcott 1924 [Alokistocaridae]
  • Elrathiella, Poulson 1927 [Alokistocaridae]
  • Elrathina, Resser 1937 [Ptychopariidae]
  • Elsonella [Conodontophorida]
  • Elvinia, Walcott 1924 [Elviniidae]
  • Elvinoides, Ivshin 1962 [Ptychopariida]
  • Elviraspis, Ivshin 1962 [Ptychopariida]
  • Elyaspis, Kurtz 1975 [Elviniidae]
  • Elymocaris [Archaeostraca]
  • Elymospirifer, Wang 1974 [Acrospiriferidae]
  • Elysiacea [Sacoglossa]
  • Elyx, Brogger 1879 [Conocoryphidae]
  • Emaciaticeras [Hildoceratidae]
  • Emanuella, Grabau 1923 [Ambocoeliidae]
  • Emarginula, Lamarck 1801 [Fissurellidae]
  • Emarginula (Tauschia), Haber 1932 [Fissurellidae]
  • Emarginulina [Archaeogastropoda]
  • Emarites [Hyolithida]
  • Emballotheca [Cheilostomata]
  • Embaphias, Cope 1894 [Sauropterygia]
  • Embaysgnathus [Conodontophorida]
  • Embolophyllum, Pedder 1967 [Ptenophyllidae]
  • Embolosia [Terebratulidae]
  • Embryocrinus, Wanner 1916 [Codiacrinidae]
  • Embryotoxotis [Palaeocopida]
  • Emeiella [Arthropoda]
  • Emeraldella, Walcott 1912 [Arachnomorpha]
  • Emeraldellida, order, Størmer 1944 [Merostomoidea]
  • Emersonia, Haber 1932 [Fissurellidae]
  • Emersonius, Ross 1967 [Balanidae]
  • Emileia [Otoitidae]
  • Emilites, Ruzhencev 1938 [Adrianitidae]
  • Emiluvia, Foreman 1973 [Emiluviidae]
  • Emmelichthys, Richardson 1845 [Perciformes]
  • Emmonsaspis, Resser and Howell 1938 [Problematica]
  • Emmonsia, Milne-Edwards and Haime 1851 [Favositidae]
  • Emmonsoceras, Flower 1958 [Emmonsoceratidae]
  • Emmrichella, Walcott 1911 [Asaphiscidae]
  • Emmrichops, Marek 1961 [Cyclopygidae]
  • Empedaspis [Pteraspidomorphes]
  • Emperoceras, Hyatt 1894 [Nostoceratidae]
  • Emperocrinus, Miller and Gurley 1895 [Diplobathrida]
  • Emphasia [Podocopida]
  • Empheresula, Harrison 1975 [Sulidae]
  • Empleconia, Dall 1908 [Limopsidae]
  • Emploca [Hexactinosa]
  • Empodesma, Moore and Jeffords 1945 [Polycoeliidae]
  • Emsurella, Rozova 1960 [Corynexochida]
  • Emsurina, Sivov 1955 [Phacopida]
  • Emuella, Pocock 1970 [Emuellidae]
  • Enaeta, H. Adams and A. Adams 1853 [Volutidae]
  • Enaliornis, H. G. Seeley 1876 [Aves]
  • Enallhelia, Milne-Edwards and Haime 1849 [Stylinidae]
  • Enallocoenia, d'Orbigny 1849 [Actinastreidae]
  • Enallocrinus, Orbigny 1850 [Cladida]
  • Enallophrentis [Anthozoa]
  • Enallopora [Fenestrata]
  • Enallopsammia, Michelotti 1871 [Dendrophylliidae]
  • Enammocephalus, Repina 1964 [Ptychopariida]
  • Enantiaspis, Rasetti 1972 [Redlichiida]
  • Enantiomorphina [Foraminifera]
  • Enantiopoda, order, Birshtein 1960 [Remipedia]
  • Enantiosphen [Enantiosphenidae]
  • Enantiosphenella [Enantiosphenidae]
  • Enantiostreon [Ostreida]
  • Enascocrinus, Strimple and Watkins 1969 [Taxocrinida]
  • Enatimene, Iredale 1929 [Muricidae]
  • Enatiodentalina [Nodosariidae]
  • Enaulofungia, Fromentel 1860 [Stellispongiidae]
  • Enayites [Cephalopoda]
  • Enchelion, Hay 1903 [Anguilliformes]
  • Enchelurus, Marck 1863 [Actinopterygii]
  • Enchelyolepis, Woodward 1918 [Macrosemiiformes]
  • Enchondrospirifer [Echinospiriferidae]
  • Enchostoma [Problematica]
  • Enchoteuthis, Miller and Walker 1968 [Paleololiginidae]
  • Encicellaria [Cheilostomata]
  • Enclyclomphalus [Archaeogastropoda]
  • Encoiloceras, Hyatt in Zittel 1900 [Tainoceratidae]
  • Encrinida, order [Crinoidea]
  • Encrinuraspis, Webby et al. 1970 [Encrinuridae]
  • Encrinurella, Reed 1915 [Pliomeridae]
  • Encrinuroides, Reed 1931 [Encrinuridae]
  • Encrinus, Andreae 1764 [Encrinidae]
  • Endamplexus, Koker 1924 [Endamplexidae]
  • Endelocrinus, Moore and Plummer 1940 [Paradelocrinidae]
  • Endeodiadema [Diadematoida]
  • Endianaulax [Archaeogastropoda]
  • Endiaplocus [Heterostrophia]
  • Endiataenia [Neotaenioglossa]
  • Endiatoma [Neogastropoda]
  • Endiatrachelus, Cossmann 1898 [Nerineidae]
  • Endoaspis, Lochman 1956 [Trilobita]
  • Endoceras, Hall 1847 [Endoceratidae]
  • Endocerida, order, Teichert 1933 [Cephalopoda]
  • Endochernella [Foraminifera]
  • Endocostea, Whitfield 1877 [Inoceramidae]
  • Endodiscosorus, Teichert 1931 [Lowoceratidae]
  • Endolobus, Meek and Worthen 1865 [Koninckioceratidae]
  • Endolophia [Metacopida]
  • Endomargarus [Pholadomyida]
  • Endopachychilus [Neogastropoda]
  • Endopachys, Lonsdale 1845 [Dendrophylliidae]
  • Endophyllum, Milne-Edwards and Haime 1851 [Endophyllidae]
  • Endoplanoceras, Flower 1938 [Nephriticeratidae]
  • Endoplectoceras, Foerste 1924 [Phragmoceratidae]
  • Endoptygma [Neotaenioglossa]
  • Endosacculus [Problematica]
  • Endosacculus [Cirripedia]
  • Endospirifer [Cyrtiidae]
  • Endospiroplectammina [Foraminifera]
  • Endostokesoceras [Discosorida]
  • Endostoma, Roemer 1864 [Endostomatidae]
  • Endoteba [Endotebidae]
  • Endotebanella [Foraminifera]
  • Endothecium, Koker 1924 [Endotheciidae]
  • Endothyra [Endothyridae]
  • Endothyranella [Endothyridae]
  • Endothyranopsis [Endothyridae]
  • Endotriada [Foraminifera]
  • Endotriadella [Foraminifera]
  • Endrea [Atrypidae]
  • Endymionia, Billings 1865 [Raphiophoridae]
  • Engelia [Diadematoida]
  • Engenella [Hesperonomiidae]
  • Engina, Gray 1839 [Buccinidae]
  • Engoniophos [Nassariidae]
  • Engraulis, Cuvier 1817 [Clupeidae]
  • Enichaster [Spatangoida]
  • Enida, A. Adams 1860 [Trochidae]
  • Enigmalosia [Araksalosiidae]
  • Enigmatichthys, Wade 1935 [Semionotiformes]
  • Enigmonia, Iredale 1918 [Anomiidae]
  • Enischorhynchus [Crossognathiformes]
  • Enkelbergia [Pterioida]
  • Ennosviaspis [Pteraspidomorphes]
  • Ennucula, Iredale 1931 [Nuculidae]
  • Ennucula (Lissanucula), Woodring 1973 [Nuculidae]
  • Enodithyris [Zeilleriidae]
  • Enophrys, Swainson 1839 [Scorpaeniformes]
  • Enoploceras, Hyatt in Zittel 1900 [Tainoceratidae]
  • Enoploclytia, F. McCoy 1849 [Erymidae]
  • Enoplocoelia, Steinmann 1882 [Girtyocoeliidae]
  • Enoplonotus, A. Milne-Edwards 1860 [Portunidae]
  • Enoplophthalmus, Sauvage 1880 [Osmeriformes]
  • Enoplostomella [Schizoporellidae]
  • Enoplosus, Lacpde 1802 [Perciformes]
  • Enoploura [Mitrata]
  • Enosphinctes [Cephalopoda]
  • Ense, Struve 1992 [Terebratulida]
  • Enseosteus, Jaeckel 1919 [Selenosteidae]
  • Ensia [Bivalvia]
  • Ensiculus, H. Adams 1860 [Pharidae]
  • Ensiferites, Reimann 1945 [Astraeospongiidae]
  • Ensio [Cardiida]
  • Ensiphragma [Cryptostomata]
  • Ensipora [Cryptostomata]
  • Ensis, Schumacher 1817 [Pharidae]
  • Ensisolen [Solenidae]
  • Ensitellops [Sportellidae]
  • Entacanthus [Neogastropoda]
  • Entactinia, Foreman 1963 [Entactiniidae]
  • Entactinosphaera, Foreman 1963 [Entactiniidae]
  • Entalina, Monterosato 1872 [Entalinidae]
  • Entalophora, Lamoureux 1821 [Entalophoridae]
  • Entalophoroecia [Cyclostomata]
  • Entapium, Sanfilippo and Riedel 1973 [Entapiidae]
  • Enteletella [Enteletidae]
  • Enteletes [Enteletidae]
  • Enteletina [Enteletidae]
  • Entelophyllia [Anthozoa]
  • Entelophyllum, Wedekind 1927 [Entelophyllidae]
  • Enterolasma, Simpson 1900 [Streptelasmatidae]
  • Enteropleura, Kittl 1912 [Halobiidae]
  • Enteropneusta, class [Hemichordata]
  • Entimoceras [Discosorida]
  • Entogonites, Kittl 1904 [Entogonitidae]
  • Entolioides [Entoliidae]
  • Entoliopsis [Pterioida]
  • Entolium, Meek 1865 [Entoliidae]
  • Entomaria [Cheilostomata]
  • Entomaspis, Ulrich 1931 [Harpetidae]
  • Entomaster [Holasteridae]
  • Entomella, Cossmann 1888 [Fissurellidae]
  • Entomoconchus [Myodocopida]
  • Entomonotis [Pterioida]
  • Entomope, Cossmann 1888 [Iravadiidae]
  • Entomoprimitia [Myodocopida]
  • Entomozoe [Myodocopida]
  • Entoprimitia [Podocopida]
  • Entoprocta, phylum, Nitsche 1869 [Polyzoa]
  • Enygmophyllum, Fomichev 1931 [Uraliniidae]
  • Eoacidaspis, Poletaeva 1956 [Lichakephalidae]
  • Eoacrochordiceras, Wang 1978 [Acrochordiceratidae]
  • Eoacteon, L. W. Stephenson 1955 [Acteoninidae]
  • Eoagnostus, Resser and Howell 1938 [Spinagnostidae]
  • Eoammosphaeroides [Foraminifera]
  • Eoamphistrophia [Amphistrophiidae]
  • Eoanastrophia [Parastrophinidae]
  • Eoanguilla, Blot 1978 [Anguilliformes]
  • Eoannularia [Foraminifera]
  • Eoapatokephalus, Rozova 1983 [Asaphida]
  • Eoaquapulex [Palaeocopida]
  • Eoasaphus, Kobayashi 1936 [Asaphida]
  • Eoasianites, Ruzhencev 1933 [Neoicoceratidae]
  • Eoatlanta [Neotaenioglossa]
  • Eoaulostomus, Blot 1981 [Gasterosteiformes]
  • Eobactrites, Schindewolf 1932 [Baltoceratidae]
  • Eobelemnites, Flower 1945 [Belemnitida]
  • Eobeloceras, Schindewolf 1936 [Beloceratidae]
  • Eobiernatella [Athyrididae]
  • Eobothus, Eastman 1914 [Pleuronectiformes]
  • Eobrachythyrina [Choristitidae]
  • Eobrachythyris [Spiriferidae]
  • Eobromidella [Euprimitidae]
  • Eobronteus, Reed 1928 [Styginidae]
  • Eobuglossus, Chabanaud 1931 [Pleuronectiformes]
  • Eobuntonia [Podocopida]
  • Eocalcinus, Via 1959 [Diogenidae]
  • Eocallista, Douvill 1921 [Corbiculidae]
  • Eocameroceras [Endocerida]
  • Eocamptocrinus, Gluchowski 1980 [Monobathrida]
  • Eocamptonectes [Deltopectinidae]
  • Eocanites, Librovitch 1957 [Prolecanitidae]
  • Eocarcinosoma [Eurypterida]
  • Eocarcinus, Withers 1932 [Eocarcinidae]
  • Eocaridacea, order, Brooks 1962 [Malacostraca]
  • Eocaris [Eocaridacea]
  • Eocarniodus [Conodontophorida]
  • Eocarpilius, W. C. Blow and R. B. Manning 1996 [Carpiliidae]
  • Eocatenipora, Hamada 1957 [Halysitidae]
  • Eocephalites [Cephalopoda]
  • Eocephalodiscus [Cephalodiscida]
  • Eoceratoconcha [Cirripedia]
  • Eocerithium [Neotaenioglossa]
  • Eocernina, Gardner 1934 [Ampullinidae]
  • Eocheiurus [Phacopida]
  • Eochelodes [Mattheviidae]
  • Eochelone, Dollo 1903 [Cheloniidae]
  • Eochetoceras [Oppeliidae]
  • Eochilina [Palaeocopida]
  • Eochonetes, Reed 1917 [Sowerbyellidae]
  • Eochoristitella [Spiriferidae]
  • Eochoristites [Palaeochoristitidae]
  • Eochuangia, kobayashi 1935 [Leiostegiidae]
  • Eocicerocrinus, Donovan 1989 [Crinoidea]
  • Eocithara, Fischer 1883 [Harpidae]
  • Eoclarkoceras [Ellesmerocerida]
  • Eoclathurella, Casey 1904 [Turridae]
  • Eoclavatorella [Foraminifera]
  • Eocoelia [Leptocoeliidae]
  • Eocomatula, Simms 1986 [Eocomatulidae]
  • Eoconcha, Cooper 1951 [Nisusiidae]
  • Eoconchidium, Rozman 1967 [Virgianidae]
  • Eoconchoecia [Podocopida]
  • Eoconodontus [Conodontophorida]
  • Eoconularia [Scyphozoa]
  • Eoconuloides [Foraminifera]
  • Eoconulus, Cooper 1956 [Eoconulidae]
  • Eocopea [Isopoda]
  • Eocoryne [Porifera]
  • Eocramatia [Eocramatiidae]
  • Eocrassina [Cardiida]
  • Eocrinoidea, class, Jaekel 1918 [Blastozoa]
  • Eocrioceratites, Wiedmann 1973 [Himantoceratidae]
  • Eocristellaria [Robuloididae]
  • Eocryphops, Richter 1931 [Phacopidae]
  • Eocyckistomiceras [Ellesmerocerida]
  • Eocymatium [Neotaenioglossa]
  • Eocyphinium, F.R.C. Reed 1942 [Proetidae]
  • Eocypraea, Cossmann 1903 [Ovulidae]
  • Eocypridina [Cylindroleberididae]
  • Eocyrtoceras [Oncocerida]
  • Eocyrtosymbole, Pillet 1973 [Proetida]
  • Eocystites, Billings 1868 [Ascocystitida]
  • Eocythara [Neogastropoda]
  • Eocytherella [Palaeocopida]
  • Eocytheridea [Podocopida]
  • Eocytheropteron [Podocopida]
  • Eodallina [Laqueidae]
  • Eodalmanella [Ranorthidae]
  • Eodalmanitina, Richter 1964 [Dalmanitidae]
  • Eodanubites, Wang 1978 [Danubitidae]
  • Eoderoceras [Eoderoceratidae]
  • Eodesmoceras [Cephalopoda]
  • Eodiadema [Diadematidae]
  • Eodiaphragmoceras [Ellesmerocerida]
  • Eodiaphyodus [Anguilliformes]
  • Eodiceras, Pchelintsev 1959 [Hippuritida]
  • Eodictyoptychus, Skelton and El-Asa'ad 1992 [Dictyoptychidae]
  • Eodindymene, Kielan 1960 [Phacopida]
  • Eodinobolus, Rowell 1963 [Trimerellidae]
  • Eodiodon, Casier 1952 [Tetraodontiformes]
  • Eodiorthelasma [Draboviidae]
  • Eodiscus, Matthew 1896 [Eodiscidae]
  • Eodmitria [Cyrtospiriferidae]
  • Eodon [Cardiida]
  • Eodonax [Cardiida]
  • Eodouvilleiceras [Cephalopoda]
  • Eodrevermannia, Pribyl 1946 [Eodrevermanniinae]
  • Eodrilla [Neogastropoda]
  • Eodyscritella [Trepostomida]
  • Eoectenolites [Ellesmerocerida]
  • Eoendothyra [Foraminifera]
  • Eoendothyranopsis [Endothyridae]
  • Eoeponidella [Foraminifera]
  • Eoescharopora, Jiang 1982 [Problematica]
  • Eoetmopterus, Muller and Schollmann 1989 [Squaliformes]
  • Eofabiania [Foraminifera]
  • Eofallotaspis [Fallotaspididae]
  • Eofistulipora [Cystoporata]
  • Eofletcheria, Bassler 1950 [Syringophyllidae]
  • Eofletcheriella, Lin and Chow 1977 [Fletcheriellidae]
  • Eoforschia [Foraminifera]
  • Eofusulina [Fusulinoidea]
  • Eogaleropygus [Cassiduloida]
  • Eogaleus, Cappetta 1975 [Carchariniformes]
  • Eogaudryceras, Spath 1927 [Gaudryceratidae]
  • Eoglobigerina [Foraminifera]
  • Eoglossinotoechia [Glossinotoechiidae]
  • Eoglossophyllum, Yü 1974 [Disphyllidae]
  • Eoglyptograptus [Graptoloidea]
  • Eognathodus [Conodontophorida]
  • Eogonioloboceras, Librovitch 1957 [Eogonioloboceratidae]
  • Eogorgia, Hickson 1938 [Gorgonacea]
  • Eographiodactylus [Palaeocopida]
  • Eogryphus, Hertlein and Grant 1944 [Terebratulida]
  • Eogunnarites [Kossmaticeratidae]
  • Eoguttulina [Polymorphinidae]
  • Eogymnites, L. F. Spath 1951 [Gymnitidae]
  • Eohalysiocrinus, Prokop 1970 [Crinoidea]
  • Eoharpa, L. W. Stephenson 1955 [Harpidae]
  • Eoharpes, Raymond 1905 [Harpetidae]
  • Eohastigerinella [Foraminifera]
  • Eohecticoceras [Cephalopoda]
  • Eohemithiris, Hertlein and Grant 1944 [Basiliolidae]
  • Eoheteroceras [Cephalopoda]
  • Eoheteropora [Cyclostomata]
  • Eohippotha [Cheilostomata]
  • Eohollina [Palaeocopida]
  • Eoholocentrum, Sorbini and Tirapelle 1975 [Beryciformes]
  • Eohornera [Cyclostomata]
  • Eohowellella [Reticulariidae]
  • Eohydnophora, Yabe and Eguchi 1936 [Faviidae]
  • Eoinachoides, Van Straelen 1933 [Majidae]
  • Eoindocrinus, Arendt 1981 [Indocrinidae]
  • Eoisotelus, Wang 1938 [Asaphidae]
  • Eokaolishania, Wittke 1984 [Kaolishaniidae]
  • Eokaotaia, Yuan and Zhao 1994 [Ptychopariidae]
  • Eokarpinskia [Karpinskiidae]
  • Eokirkidium, Khodalevich and Sapel'nikov 1970 [Pentameridae]
  • Eokloedenia [Palaeocopida]
  • Eokosovopeltis, Pribyl and Vanek 1972 [Styginidae]
  • Eokrefftia, Schwarzhans 1895 [Myctophiformes]
  • Eolabroides, Eastman 1914 [Perciformes]
  • Eolacazella [Thecideidae]
  • Eolactoria, Tyler 1975 [Tetraodontiformes]
  • Eolagena [Foraminifera]
  • Eolamprogrammus, Daniltshenko 1968 [Ophidiiformes]
  • Eolasiodiscus [Foraminifera]
  • Eolasma [Cirripedia]
  • Eolates [Perciformes]
  • Eoleonaspis, Sheng 1974 [Odontopleuridae]
  • Eolepas, Withers 1928 [Scalpellidae]
  • Eoleperditia, Swartz 1949 [Leperditiidae]
  • Eolimea, Cox 1969 [Limidae]
  • Eolimulus, Bergström 1968 [Merostomata]
  • Eoliotina [Archaeogastropoda]
  • Eolomatella [Palaeocopida]
  • Eolophotes, Daniltshenko 1980 [Lampridiformes]
  • Eolotagnostus, Zhou 1982 [Agnostidae]
  • Eoluvarus, Sahni and Choudhary 1977 [Perciformes]
  • Eolyttonia [Lyttoniidae]
  • Eomactra, Cossmann 1909 [Mactridae]
  • Eomadrasites [Kossmaticeratidae]
  • Eomanta [Myliobatiformes]
  • Eomaoristrophia [Amphistrophiidae]
  • Eomarginifera [Productidae]
  • Eomarssonella [Foraminifera]
  • Eomartiniopsis [Martiniidae]
  • Eomathilda [Neotaenioglossa]
  • Eomegalodus [Hippuritida]
  • Eomegastrophia [Leptostrophiidae]
  • Eomeretrix [Cardiida]
  • Eomesodon, Woodward 1918 [Pycnodontiformes]
  • Eomiltha, Cossmann 1912 [Lucinidae]
  • Eomiodon, Cox 1935 [Neomiodontidae]
  • Eomoelleritia, Abushik 1972 [Leperditicopida]
  • Eomonorachus, Delo 1935 [Pterygometopidae]
  • Eomonotis, J.A. Grant-Mackie 1978 [Monotidae]
  • Eomunidopsis, Via Boada 1981 [Galatheidae]
  • Eomuraena, Casier 1967 [Anguilliformes]
  • Eomyctophum, Daniltshenko 1947 [Myctophiformes]
  • Eomyelodactylus, Foerste 1919 [Crinoidea]
  • Eomyrophis, Whitley 1950 [Anguilliformes]
  • Eomyrus, Eastman 1905 [Anguilliformes]
  • Eonalivkinia [Anazygidae]
  • Eonavicula, Arkell 1929 [Arcidae]
  • Eonodosaria [Foraminifera]
  • Eonomia [Anomiidae]
  • Eonomismoceras, Kusina 1974 [Nomismoceratidae]
  • Eonotidanus, Pfeil 1893 [Hexanchiformes]
  • Eonovitatus [Orthothecida]
  • Eontia, MacNeil 1937 [Noetiidae]
  • Eoophthalmidium [Ophthalmidiidae]
  • Eoorodus, Branson 1914 [Ctenacanthiformes]
  • Eoorthis [Eoorthidae]
  • Eopachydictya [Rhinidictyidae]
  • Eopachydiscus [Pachydiscidae]
  • Eopaijenborchella [Podocopida]
  • Eopalorbitolina [Foraminifera]
  • Eoparalegoceras, Delépine 1939 [Pseudoparalegoceratidae]
  • Eoparaparchites [Podocopida]
  • Eoparaphorhynchus [Leiorhynchidae]
  • Eoparisocrinus, Ausich 1986 [Cladida]
  • Eopatelliocrinus, Brower 1973 [Monobathrida]
  • Eopecten, Douvill 1897 [Pectinidae]
  • Eopeyeria, Whitley 1947 [Siluriformes]
  • Eophacops, Delo 1935 [Phacopidae]
  • Eophasma [Nematoda]
  • Eopholidostrophia [Eopholidostrophiidae]
  • Eophycis, Jerzmanska 1968 [Gadiformes]
  • Eophyllites, L. F. Spath 1930 [Ussuritidae]
  • Eophysema, Stewart 1930 [Lucinidae]
  • Eopilidiocrinus, Arendt 1981 [Cladida]
  • Eopinctada, Tamura 1961 [Pteriidae]
  • Eopinnacrinus, Brower and Veinus 1982 [Cladida]
  • Eoplacognathus [Conodontophorida]
  • Eoplatax, Blot 1969 [Perciformes]
  • Eoplectodonta, R. Kozlowski 1929 [Sowerbyellidae]
  • Eoplectus, Tyler 1975 [Tetraodontiformes]
  • Eopleurotoma, Cossmann 1889 [Turridae]
  • Eoplicanoplia [Strophochonetidae]
  • Eoplicoplasia [Ambocoeliidae]
  • Eopolychaetus [Polychaeta]
  • Eopolydiexodina [Schwagerinidae]
  • Eoporpita [Hydrozoa]
  • Eoprodromites, Work et al. 1988 [Prodromitidae]
  • Eoproductella [Monticuliferidae]
  • Eoproetus [Proetida]
  • Eoprosodacna [Cardiida]
  • Eoprosopon, Forster 1986 [Homolodromiidae]
  • Eoprotelops, Saint-Seine 1949 [Protelopidae]
  • Eops, Richter 1940 [Saukiandidae]
  • Eopsetta, Jordan and Goss 1887 [Pleuronectiformes]
  • Eopsiloceras, L. F. Spath 1930 [Ussuritidae]
  • Eopteridium, Rohdendorf 1970 [Palaeostomatopoda]
  • Eoptychaspis, Nelson 1951 [Asaphida]
  • Eoptychoparia, Rasetti 1955 [Ptychopariidae]
  • Eopugnax [Pugnacidae]
  • Eoquasiendothyra [Foraminifera]
  • Eoradiolites, Douvill 1909 [Radiolitidae]
  • Eoranella [Neotaenioglossa]
  • Eoredlichia, Chang 1950 [Redlichiidae]
  • Eoreticularia [Reticulariidae]
  • Eorhipidomella, Hints 1971 [Platyorthidae]
  • Eorizoceras, Flower 1943 [Graciloceratidae]
  • Eorotundracythere [Podocopida]
  • Eorupertia [Foraminifera]
  • Eosagenites, E. T. Tozer 1971 [Eosagenitidae]
  • Eosalenia [Aspidodiadematidae]
  • Eosalmo, Wilson 1975 [Salmoniformes]
  • Eosaukia, Lu 1954 [Trilobita]
  • Eoscaphelasma, Koneva et al. 1990 [Scaphelasmatidae]
  • Eoscaphites, Breistroffer 1947 [Scaphitidae]
  • Eoschistoceras, Ruzhencev 1952 [Schistoceratidae]
  • Eoschizodus, Cox 1951 [Eoschizodidae]
  • Eoschubertella [Schubertellidae]
  • Eoschuchertella [Areostrophiidae]
  • Eoscrupocellaria [Cheilostomata]
  • Eoscutellum [Corynexochida]
  • Eoscutum [Fibulariidae]
  • Eosemicoscinium [Fenestrata]
  • Eosericoidea [Taffiidae]
  • Eoserranus, Woodward 1908 [Perciformes]
  • Eoshumardia, Hupe 1953 [Shumardiidae]
  • Eosigmoilina [Foraminifera]
  • Eosinica [Umbraculomorpha]
  • Eosipho [Neogastropoda]
  • Eosiphonalia, Ruth 1942 [Neptuneidae]
  • Eosiphonotreta [Siphonotretidae]
  • Eosolarium, Chavan 1947 [Architectonicidae]
  • Eosolen, Stewart 1930 [Solenidae]
  • Eosomichelinoceras, J. Y. Chen 1974 [Baltoceratidae]
  • Eosophragmophora [Dalmanellidae]
  • Eosotrematorthis [Billingsellidae]
  • Eosphaeroma [Isopoda]
  • Eosphargis, Lydekker 1889 [Dermochelyidae]
  • Eospinatrypa [Atrypidae]
  • Eospinus, Tyler and Bannikov 1992 [Tetraodontiformes]
  • Eospirifer, C. Schuchert 1913 [Cyrtiidae]
  • Eospiriferina, A.W. Grabau 1931 [Adolfiidae]
  • Eospirigerina, Boucot and Johnson 1967 [Atrypinidae]
  • Eospongia [Streptosolenidae]
  • Eostaffella, Rauser-Chernousova 1948 [Eostaffellidae]
  • Eostaffeloides [Foraminifera]
  • Eostegostoma, Herman and Crochard 1977 [Orectolobiformes]
  • Eostenopora [Trepostomida]
  • Eostenoporella [Trepostomida]
  • Eostephanella [Podocopida]
  • Eostrophalosia, Stainbrook 1943 [Araksalosiidae]
  • Eostropheodonta, Bancroft 1949 [Leptostrophiidae]
  • Eostrophomena [Orthidiellidae]
  • Eostrophonella, A. Williams 1950 [Strophonellidae]
  • Eostrotion, Vaughan 1915 [Aulophyllidae]
  • Eostylodictya, Ormiston and Lane 1976 [Palaeolithocycliidae]
  • Eosurcula [Neogastropoda]
  • Eosynanceja, Casier 1946 [Scorpaeniformes]
  • Eosyringothyris [Spinocyrtiidae]
  • Eotaphrus [Conodontophorida]
  • Eotetragonites, Breistroffer 1947 [Gaudryceratidae]
  • Eotetraodon, Tyler 1980 [Tetraodontiformes]
  • Eotextularia [Palaeospiroplectamminidae]
  • Eothalassoceras, Miller and Furnish 1940 [Thalassoceratidae]
  • Eothecidellina [Thecidellinidae]
  • Eothele, Rowell 1980 [Acrothelidae]
  • Eothesbia [Neogastropoda]
  • Eothinites, Ruzhencev 1933 [Metalegoceratidae]
  • Eothinoceras, F. A. Ulrich et al. 1944 [Bathmoceratidae]
  • Eothuria [Lepidocentridae]
  • Eothyrsites, Chapman 1934 [Perciformes]
  • Eotissotia, Barber 1957 [Pseudotissotiidae]
  • Eotomopteris [Phyllodocemorpha]
  • Eotorpedo, White 1934 [Torpedinidae]
  • Eotournayella [Foraminifera]
  • Eotrapezium, Douvill 1912 [Arcticidae]
  • Eotrigonia [Trigoniida]
  • Eotrimeroceras, Foerste 1928 [Trimeroceratidae]
  • Eotrinucleus, Zhou and Zhang 1978 [Trinucleidae]
  • Eotripteroceras, Flower 1943 [Cephalopoda]
  • Eotrivia [Neotaenioglossa]
  • Eotrochactaeon, Akopyan 1972 [Cephalaspida]
  • Eotrophonia [Polychaeta]
  • Eotuberitina [Tuberitinidae]
  • Eoturris [Neogastropoda]
  • Eoursivivas, Ota 1964 [Corbulidae]
  • Eousella [Gusarellidae]
  • Eouvigerina [Foraminifera]
  • Eovasum, Douvill 1920 [Vasidae]
  • Eoverbeekina [Staffellidae]
  • Eoverruca [Cirripedia]
  • Eovolutilithes [Neogastropoda]
  • Eovolutina [Foraminifera]
  • Eovolva [Neotaenioglossa]
  • Eowaeringella [Fusulinoidea]
  • Eowedekindellina [Foraminifera]
  • Eowellerites, Ruzhencev 1957 [Welleritidae]
  • Eowuhuia, Zhang and Wang 1984 [Asaphida]
  • Eozanclus, Blot and Voruz 1975 [Perciformes]
  • Eozellia [Schwagerinidae]
  • Epacrochordiceras, L. F. Spath 1934 [Acrochordiceratidae]
  • Epactridion, Bengston 1990 [Archaeocopida]
  • Epadrianites, Schindewolf 1931 [Adrianitidae]
  • Epalxis, Cossmann 1889 [Turridae]
  • Epancyloceras [Cephalopoda]
  • Eparietites [Arietitidae]
  • Epaspidoceras [Cephalopoda]
  • Epelidoaegiria [Aegiromenidae]
  • Epetrium [Neotaenioglossa]
  • Epeudea [Calcarea]
  • Epheria [Neotaenioglossa]
  • Ephippelasma, Cooper 1956 [Ephippelasmatidae]
  • Ephippioceras, Hyatt 1884 [Ephippoceratidae]
  • Ephippiorthoceras, Foerste 1924 [Proteoceratidae]
  • Epialtus, H. Milne-Edwards 1834 [Majidae]
  • Epiannularia [Foraminifera]
  • Epiaster [Spatangoida]
  • Epicanites, Schindewolf 1926 [Daraelitidae]
  • Epiceltites, G. v. Arthaber 1911 [Columbitidae]
  • Epicephalites [Cephalopoda]
  • Epiceratites, C. Diener 1915 [Aplococeratidae]
  • Epicheloniceras [Douvilleiceratidae]
  • Epicodakia, Iredale 1930 [Lucinidae]
  • Epicosmoceras [Kosmoceratidae]
  • Epicymatoceras, Kummel 1956 [Cymatoceratidae]
  • Epicyprina, Casey 1952 [Arcticidae]
  • Epicyrta [Zeilleriidae]
  • Epideira [Neogastropoda]
  • Epideroceras [Phricodoceratidae]
  • Epidiceras [Hippuritida]
  • Epidirella, Iredale 1931 [Turridae]
  • Epidirona, Iredale 1939 [Turridae]
  • Epidomatoceras, Turner 1954 [Grypoceratidae]
  • Epifaxis [Archaeogastropoda]
  • Epiglyphioceras, Spath 1930 [Metalegoceratidae]
  • Epiglyptoxoceras [Cephalopoda]
  • Epigondolella [Gondolellidae]
  • Epigonites [Cephalopoda]
  • Epigonus, Rafinesque 1810 [Perciformes]
  • Epigraptus [Tuboidea]
  • Epigymnites, C. Diener 1916 [Gymnitidae]
  • Epihalysiocrinus, Arendt 1965 [Crinoidea]
  • Epihoplites [Hoplitidae]
  • Epijuresanites, Popov 1970 [Paragastrioceratidae]
  • Epileymeriella [Leymeriellidae]
  • Epilucina, Dall 1901 [Lucinidae]
  • Epimayaites [Mayaitidae]
  • Epimorphoceras [Reineckeiidae]
  • Epinephelus, Bloch 1793 [Serranidae]
  • Epinnula, Poey 1854 [Perciformes]
  • Epipallasiceras [Cephalopoda]
  • Epipaston [Isorophida]
  • Epipeltoceras [Cephalopoda]
  • Epipetalichthys, Stensiö 1925 [Petalichthida]
  • Epipetschoracrinus, Yakovlev 1956 [Cladida]
  • Epiphaxum [Helioporacea]
  • Epiphyllina [Coronatida]
  • Epiphyllum [Procyclolitidae]
  • Episageceras, Noetling 1904 [Medlicottiidae]
  • Episculites, L. F. Spath 1951 [Episculitidae]
  • Episcynia, Morch 1875 [Vitrinellidae]
  • Episiphon, Pilsbry 1897 [Gadilinidae]
  • Epismilia, Fromentel 1861 [Zardinophyllidae]
  • Epismiliopsis, Alloiteau 1952 [Zardinophyllidae]
  • Epistomaria [Foraminifera]
  • Epistomella, Zittel 1878 [Scleritodermatidae]
  • Epistomina [Epistominidae]
  • Epistominella, Husezima and Maruhasi 1944 [Discorbidae]
  • Epistominita [Foraminifera]
  • Epistominitella [Foraminifera]
  • Epistominoides [Foraminifera]
  • Epistrenoceras [Parkinsoniidae]
  • Epistreptophyllum, Milaschewitsch 1876 [Dermosmiliidae]
  • Epistroboceras, J.S. Turner 1954 [Trigonoceratidae]
  • Epitheles, Fromentel 1860 [Sestrostomellidae]
  • Epithemella [Foraminifera]
  • Epithyris, Phillips 1841 [Postepithyrididae]
  • Epitonium, Röding 1798 [Epitoniidae]
  • Epitornoceras, Frech 1902 [Tornoceratidae]
  • Epitrachys [Polychaeta]
  • Epitrochus [Scleractinia]
  • Epivirgatites [Cephalopoda]
  • Epiwocklumeria, Schindewolf 1937 [Wocklumeriidae]
  • Eponidella [Foraminifera]
  • Eponides, Montfort 1808 [Eponididae]
  • Epopella [Cirripedia]
  • Epophioceras [Arietitidae]
  • Eptingium, Dumitrica 1978 [Eptingiidae]
  • Epulotrochus, Cossmann 1918 [Proconulidae]
  • Equicastanea [Palaeocopida]
  • Equichlamys, Iredale 1929 [Pectinidae]
  • Equirostra [Porambonitidae]
  • Erato, Risso 1826 [Triviidae]
  • Eratocrinus, Kirk 1938 [Cladida]
  • Eratoidea, Weinkauff 1879 [Marginellidae]
  • Eratopsis [Eratoidae]
  • Eratotrivia [Neotaenioglossa]
  • Erbechinus [Temnopleuridae]
  • Erbenaspis, Vanek 1961 [Proetidae]
  • Erbenia, Whittke 1984 [Asaphida]
  • Erbenicoryphe, Feist 1989 [Proetida]
  • Erbenites, Pribyl 1964 [Proetidae]
  • Erbenoceras, Bogoslovsky 1962 [Mimosphinctidae]
  • Erbia, Lermontova 1940 [Dinesidae]
  • Erbiella, Fedyanina 1962 [Dinesidae]
  • Erbiopsidella, Pokrovskaya 1959 [Dinesidae]
  • Erbiopsis, Lermontova 1940 [Dinesidae]
  • Erbocyathus [Ajacicyathida]
  • Erdoradites, Ivshin 1962 [Ptychopariida]
  • Erectocephalus [Stringocephalidae]
  • Erediaspis, Opik 1967 [Tricrepicephalidae]
  • Eremactis, Bengston and Conway-Morris 1990 [Chancelloriidae]
  • Eremiproetus, R. Richter and E. Richter 1919 [Proetidae]
  • Eremitacyathus [Archaeocyathida]
  • Eremites, E. v. Mojsisovics 1893 [Sandlingitidae]
  • Eremoceras, Hyatt 1884 [Ellesmeroceratidae]
  • Eremochitina [Rhizopodea]
  • Eremos, Moberg and Segerberg 1906 [Beyrichonidae]
  • Eremotoechia [Polytoechiidae]
  • Eremotrema, Cooper 1956 [Dalmanellidae]
  • Eretmocrinus, Lyon and Casseday 1859 [Monobathrida]
  • Erettopterus [Eurypterida]
  • Ergenica [Cardiida]
  • Erginus [Archaeogastropoda]
  • Eribotrys, Foreman 1968 [Artostrobiidae]
  • Ericiatia [Sentosiidae]
  • Ericina [Anthozoa]
  • Ericusa, H. Adams and A. A 1858 [Volutidae]
  • Eridites, Zhuravleva 1961 [Spyroceratidae]
  • Eridocamplyus [Trepostomida]
  • Eridoconcha [Podocopida]
  • Eridophyllum, Milne-Edwards and Haime 1850 [Eridophyllidae]
  • Eridopora [Fistuliporidae]
  • Eridorthis, Foerste 1909 [Glyptorthidae]
  • Eridotrypa [Trepostomida]
  • Eridotrypella, Duncan 1939 [Atactotoechidae]
  • Eridotrypellina [Trepostomida]
  • Eriella [Metacopida]
  • Erieopterus [Eurypterida]
  • Erika [Conodontophorida]
  • Erinella [Cellariidae]
  • Erineum, Schrammen 1937 [Cribrospongiidae]
  • Erinocystis [Rhombifera]
  • Erinostrophia, Cocks and Worsley 1993 [Leptostrophiidae]
  • Erioliceras, J. J. Sepkoski 2002 [Brancoceratidae]
  • Eripachya [Neogastropoda]
  • Eriphia, Latreille 1817 [Eriphiidae]
  • Eriphyla, Gabb 1864 [Astartidae]
  • Eriphylopsis [Cardiida]
  • Eripleura [Podocopida]
  • Eripnifera [Rhactorthidae]
  • Eriptycha, Meek 1876 [Ringiculidae]
  • Eriptychius, Walcott 1892 [Astraspidiformes]
  • Eriquius, Jordan 1924 [Perciformes]
  • Erismacanthus, M'Coy 1848 [Cochliodontidae]
  • Erismacoscinus, F. Debrenne 1958 [Ajacicyathida]
  • Erismodus [Conodontophorida]
  • Erisocrinus, Meek and Worthen 1865 [Erisocrinidae]
  • Eristavites [Neocomitidae]
  • Eritropsis [Nuculida]
  • Erixanium, Opik 1963 [Aphelaspididae]
  • Erkosonea [Cyclostomata]
  • Erlangbapora, Lin 1975 [Theciidae]
  • Ermoceras [Stephanoceratidae]
  • Ernietta [Erniettamorpha]
  • Erniettamorpha, order, Pflug 1972 [Cnidaria]
  • Ernogia [Brachiopoda]
  • Erodona, Daudin 1802 [Corbulidae]
  • Erosaria, Troschel 1863 [Cypraeidae]
  • Erphyllum [Cribricyathea]
  • Erquelinnesia, Dollo 1887 [Thalassemydidae]
  • Erquitaia, Cappetta 1989 [Chondrichthyes]
  • Erratencrinurus, Krueger 1971 [Encrinuridae]
  • Erraticodon [Conodontophorida]
  • Erraticornus [Hyolithida]
  • Errhynx [Rozmanariidae]
  • Errina [Stylasterina]
  • Errolosteus, Young 1981 [Arthrodiriformes]
  • Erromenosteus, Jaeckel 1919 [Arthrodiriformes]
  • Erronea, Troschel 1863 [Cypraeidae]
  • Ertangia [Palaeocopida]
  • Erugatocyathus [Ajacicyathida]
  • Erugocentrus, Radovcic 1975 [Beryciformes]
  • Erugonia [Trigoniida]
  • Ervillia, Turton 1822 [Mesodesmatidae]
  • Erycina, Lamarck 1805 [Erycinidae]
  • Erycinella, Conrad 1845 [Condylocardiidae]
  • Erycinopsis [Cardiida]
  • Erycites [Hammatoceratidae]
  • Erylus, Gray 1867 [Geodiidae]
  • Eryma, Von Meyer 1840 [Erymidae]
  • Erymarella [Archaeogastropoda]
  • Erymastacus [Decapoda]
  • Erymnaria [Erymnariidae]
  • Erymnoceras [Pachyceratidae]
  • Erymnocerites [Pachyceratidae]
  • Eryon, Desmarest 1822 [Eryonidae]
  • Escharacytheridea [Podocopida]
  • Escharella [Escharellidae]
  • Escharendoceras, Flower 1956 [Proterocameroceratidae]
  • Escharicellaria [Cheilostomata]
  • Escharifora [Coscinopleuridae]
  • Escharina [Escharinidae]
  • Escharipora [Cheilostomata]
  • Escharoides [Exochellidae]
  • Escharopora [Fenestrata]
  • Escoffieria [Neotaenioglossa]
  • Esconites [Phyllodocemorpha]
  • Escornebovina [Foraminifera]
  • Escumasia [Cnidaria]
  • Eselaevitrigonia [Trigoniida]
  • Esericeras [Phymatoceratidae]
  • Eshelmania, Wilson 1951 [Dokimocephalidae]
  • Esilia [Strophomenidae]
  • Eskimoceras, Troedsson 1936 [Eskimoceratidae]
  • Esmeraldina, Resser and Howel 1938 [Holmiidae]
  • Esopoceras [Orthocerida]
  • Espanocrinus, Webster 1976 [Crinoidea]
  • Espella [Cyrtiidae]
  • Esperites [Demospongea]
  • Esseigania, Kobayashi 1944 [Trilobita]
  • Essexella [Rhizostomatida]
  • Essoidea [Eocaridacea]
  • Estea [Neotaenioglossa]
  • Esthonia [Anthozoa]
  • Esthoniopora [Trepostomida]
  • Esthonioporina [Fenestrata]
  • Esthoniporella [Trepostomida]
  • Esthonocrinus, Jeakel 1918 [Cladida]
  • Estlandia [Gonambonitidae]
  • Estonaceratella [Podocopida]
  • Estonielasma, Weyer 1973 [Lambelasmatidae]
  • Estonioceras, Noetling 1883 [Estonioceratidae]
  • Estoniops, Männil 1958 [Pterygometopidae]
  • Estoniops [Palaeocopida]
  • Estonirhynchia [Hebetoechiidae]
  • Estonocystis [Diploporita]
  • Etacystis [Problematica]
  • Etallonia, Oppel 1861 [Axiidae]
  • Etalloniella [Lychniscosa]
  • Etea, Conrad 1873 [Arcticidae]
  • Ethalia, H. Adams and A. A 1854 [Trochidae]
  • Ethelocrinus, Kirk 1937 [Cladida]
  • Etherella [Hexagonellidae]
  • Etheridgaspis, Kobayashi 1940 [Hystricuridae]
  • Etheridgia, Tate 1865 [Coeloptychidae]
  • Etheridgina [Echinoconchidae]
  • Ethmocardium, White 1880 [Cardiidae]
  • Ethmocoscinus [Ajacicyathida]
  • Ethmocyathus [Ajacicyathida]
  • Ethmophyllum [Ajacicyathida]
  • Etisus, H. Milne-Edwards 1834 [Xanthidae]
  • Etmopterus, Rafinesque 1810 [Etmopteridae]
  • Etoctenocystis [Ctenocystoidea]
  • Etrema, Hedley 1918 [Turridae]
  • Etremopsis, Powell 1942 [Conidae]
  • Etringus, Jordan 1907 [Clupeiformes]
  • Etrumeus, Bleeker 1853 [Clupeiformes]
  • Etymothyris [Centronellidae]
  • Etyus, Leach 1822 [Bryocryptellidae]
  • Euactaeonina, Wenz 1947 [Cephalaspida]
  • Euagassiceras [Arietitidae]
  • Euagnostus, Whitehouse 1936 [Agnostida]
  • Euaptetoceras [Hammatoceratidae]
  • Euaspidoceras [Aspidoceratidae]
  • Eubaculites, Spath 1926 [Baculitidae]
  • Eubela, Dall 1899 [Turridae]
  • Eubiodectes, Hay 1903 [Cladocyclidae]
  • Eubostrychoceras, Matsumoto 1967 [Nostoceratidae]
  • Eubranoceras [Cephalopoda]
  • Eubrochis, Schrammen 1902 [Euretidae]
  • Eubrochus [Hexactinosa]
  • Eubuliminella [Foraminifera]
  • Eucalathis, Fischer and Oehlert 1890 [Chlidonophoridae]
  • Eucallista [Cardiida]
  • Eucalycoceras, Spath 1923 [Acanthoceratidae]
  • Eucalyptocrinites, G.A. Goldfuss 1831 [Eucalyptocrinitidae]
  • Eucatillocrinus, Springer 1923 [Crinoidea]
  • Eucecryphalus, Haeckel 1860 [Theopiliidae]
  • Eucentrurus, Traquair 1901 [Chondrichthyes]
  • Eucharitina [Uncinulidae]
  • Eucheilodon, Gabb 1860 [Turridae]
  • Eucheilopora [Cheilostomata]
  • Euchelus, Philippi 1847 [Calliotropidae]
  • Euchelus (Hybochelus), Pilsbry 1890 [Trochidae]
  • Euchilotheca [Thecosomata]
  • Euchitonia, Ehrenberg 1860 [Spongodiscidae]
  • Euchrysalis [Neotaenioglossa]
  • Eucidaris [Cidaridae]
  • Euciphoceras [Nautilida]
  • Eucladocrinus, Meek 1872 [Monobathrida]
  • Euclia, H. Adams and A. Adams 1854 [Cancellariidae]
  • Euclichthys, McCulloch 1926 [Gadiformes]
  • Euclimacograptus [Graptoloidea]
  • Eucominia [Buccinidae]
  • Euconactaeon, Meek 1863 [Cylindrobullinidae]
  • Euconchitina [Rhizopodea]
  • Eucopia [Lophogastrida]
  • Eucoroniceras [Arietitidae]
  • Eucoronis, Haeckel 1881 [Acanthodesmiidae]
  • Eucrassatella, Iredale 1924 [Crassatellidae]
  • Eucratea [Cheilostomata]
  • Eucraterellina [Metacopida]
  • Eucryptocaris [Tanaidacea]
  • Eucycloceras [Macrocephalitidae]
  • Eucycloidea, Hudleston 1887 [Eucyclidae]
  • Eucyclomphalus [Eucyclidae]
  • Eucymatoceras, Spath 1927 [Cymatoceratidae]
  • Eucymba [Neogastropoda]
  • Eucypraedia [Neotaenioglossa]
  • Eucyrtidiellum, Baumgartner 1984 [Eucyrtidiellidae]
  • Eucyrtidium, Ehrenberg 1847 [Eucyrtidiidae]
  • Eucyrtis [Nassellaria]
  • Eucystis, Angelin 1878 [Sphaeronitidae]
  • Eucythere, Brady 1868 [Cytherideidae]
  • Eucytherura [Podocopida]
  • Eudea, Lamouroux 1821 [Stellispongiidae]
  • Eudecacythere [Podocopida]
  • Eudechenella, Richter 1912 [Proetida]
  • Eudesella [Thecideidae]
  • Eudesicrinus, Loriol 1882 [Eudesicrinidae]
  • Eudesites [Rhynchonellata]
  • Eudictyon, Bistram 1903 [Hexactinosa]
  • Eudimerocrinus, Springer 1926 [Diplobathrida]
  • Eudmetoceras [Hammatoceratidae]
  • Eudoceras, Hyatt 1884 [Oncocerida]
  • Eudolatites, Delo 1935 [Dalmanitidae]
  • Eudolium, Dall 1889 [Tonnidae]
  • Eudoxina [Eudoxinidae]
  • Eudoxochiton, Shuttleworth 1853 [Ischnochitonidae]
  • Euerisocrinus, Strimple 1939 [Cladida]
  • Eufistulina [Myoida]
  • Euflemingites, L. F. Spath 1934 [Flemingitidae]
  • Eugabrielona [Archaeogastropoda]
  • Eugeniacrinites, Miller 1821 [Cyrtocrinida]
  • Euglossodus, White and Moy-Thomas 1940 [Chondrichthyes]
  • Euglyphella [Metacopida]
  • Eugnathides [Pachycormiformes]
  • Eugonocare, Whitehouse 1939 [Aphelaspididae]
  • Eugyra, Fromentel 1857 [Faviidae]
  • Eugyriopsis, Beauvais 1976 [Scleractinia]
  • Euhelia, Milne-Edwards and Haime 1850 [Stylinidae]
  • Euhoplites [Hoplitidae]
  • Euhoploceras [Sonniniidae]
  • Euhydrodiskos [Isorophida]
  • Euisculites, L. F. Spath 1951 [Tropitidae]
  • Eukaryota, kingdom, G. F. Leedale 1974 [Life]
  • Eukloedenella [Knoxitidae]
  • Eulachychiton [Neoloricata]
  • Eulepidina [Lepidocyclinidae]
  • Euleptochiton [Neoloricata]
  • Euleptorhamphus, Gill 1860 [Beloniformes]
  • Euleraphe, Schrammen 1937 [Astrophorida]
  • Eulima, Risso 1826 [Eulimidae]
  • Eulimastoma, Bartsch 1916 [Pyramidellidae]
  • Eulimella, Forbes and MacAndrew 1846 [Pyramidellidae]
  • Eulimene, Wood 1872 [Littorinidae]
  • Eulinderina [Foraminifera]
  • Eulithota [Semaeostomatida]
  • Euloma, Angelin 1854 [Eulomidae]
  • Eulomella, Kobayashi 1955 [Trilobita]
  • Eulomina, Ružicka 1931 [Bathycheilidae]
  • Eulophoceras, Hyatt 1903 [Sphenodiscidae]
  • Euloxa [Euloxidae]
  • Euloxoceras, Miller et al. 1933 [Spyroceratidae]
  • Euloxostomum, McCulloch 1977 [Siphogenerinoididae]
  • Eulyra [Fenestrata]
  • Eulytoceras, Spath 1927 [Lytoceratidae]
  • Eumarcia, Iredale 1925 [Veneridae]
  • Eumarcia (Atamarcia), Marwick 1927 [Veneridae]
  • Eumedlicottia, Spath 1934 [Medlicottiidae]
  • Eumetabolotoechia [Leiorhynchidae]
  • Eumetopias, Gill 1866 [Otariidae]
  • Eumetria [Retziidae]
  • Eumetula, Thiele 1912 [Newtoniellidae]
  • Eumitra [Mitridae]
  • Eumitrocystella [Mitrata]
  • Eumorphactaea, Bittner 1875 [Pilumnidae]
  • Eumorphoceras, Girty 1909 [Girtyoceratidae]
  • Eumorphocorystes, Van Binkhorst 1857 [Palaeocorystidae]
  • Eumorphocrinus, J. Wright 1955 [Actinocrinitidae]
  • Eumorphocystis [Diploporita]
  • Eumorpholites [Hyolithomorpha]
  • Eumorphotis [Heteropectinidae]
  • Eunaticina, Fischer 1885 [Naticidae]
  • Eunice [Eunicemorpha]
  • Eunicemorpha, order [Polychaeta]
  • Eunicites [Eunicemorpha]
  • Euonchonotina, Lu and Zhou 1986 [Ptychopariida]
  • Euonychocrinus, H. L. Strimple 1940 [Taxocrinida]
  • Euorthisina [Euorthisinidae]
  • Eupachycrinus, Meek and Worthen 1865 [Cladida]
  • Eupachydiscus, Spath 1922 [Pachydiscidae]
  • Euparthenia [Heterostrophia]
  • Eupatagus, L. Agassiz 1847 [Brissidae]
  • Euphemitella [Bellerophontida]
  • Euphenax [Vulsellidae]
  • Euphylax, W. Stimpson 1862 [Portunidae]
  • Euphyllia, Dana 1846 [Euphyllidae]
  • Euphylloceras [Phylloceratidae]
  • Euphyllon [Neogastropoda]
  • Eupinacoceras, L. F. Spath 1951 [Pinacoceratidae]
  • Euplectella [Lyssacinosa]
  • Eupleura, H. Adams and A. Adams 1853 [Muricidae]
  • Eupleuroceras, Miller and Cline 1934 [Eupleuroceratidae]
  • Euplica, Dall 1889 [Columbellidae]
  • Euporosteus [Coelacanthiformes]
  • Euprimites [Palaeocopida]
  • Euprimitia [Palaeocopida]
  • Euprioniodina, Ulrich and Bassler 1926 [Prioniodidae]
  • Euprionoceras [Cardioceratidae]
  • Euprognatha, Stimpson 1871 [Inachoididae]
  • Eupsammia, Milne-Edwards and Haime 1848 [Dendrophylliidae]
  • Euptera [Pterioida]
  • Euptychaspis, Ulrich 1931 [Ptychaspididae]
  • Euptychoceras, Breistroffer 1952 [Bochianitidae]
  • Euptychocrinus, Brow 1994 [Diplobathrida]
  • Euractinella [Diplospirellidae]
  • Eurekabolbina [Palaeocopida]
  • Eurekaspirifer [Adolfiidae]
  • Eurekia, Walcott 1924 [Eurekiidae]
  • Eurete, Semper 1868 [Euretidae]
  • Eurhinosaurus, O. Abel 1909 [Reptilia]
  • Eurhodia [Pliolampadidae]
  • Eurhomalea, Cossmann 1920 [Veneridae]
  • Euriclanculus [Archaeogastropoda]
  • Eurissolina [Rissoidae]
  • Eurites, Kusina 1973 [Rotopericyclidae]
  • Euritina [Cheilostomata]
  • Euroatrypa [Atrypinidae]
  • Euroceras, Ruzhencev and Bogoslovskaya 1971 [Glaphyritidae]
  • Eurocyamus [Palaeocopida]
  • Europicardium [Cardiidae]
  • Europisthia [Palaeocopida]
  • Europora [Cryptostomata]
  • Eurostina, Whitehouse 1939 [Ptychopariida]
  • Euryalox [Phymatopleuridae]
  • Eurycaraspis, Li 1991 [Petalichthida]
  • Eurycare, Angelin 1854 [Ptychopariida]
  • Eurycarpus, Schluter 1868 [Decapoda]
  • Eurycephalites [Sphaeroceratidae]
  • Eurycheilostoma [Foraminifera]
  • Eurychilina [Palaeocopida]
  • Eurycolporhynchus [Petasmariidae]
  • Eurycormus [Furidae]
  • Eurydike [Neogastropoda]
  • Eurydiscites [Demospongea]
  • Euryentome [Neogastropoda]
  • Euryitycythere [Podocopida]
  • Eurymyella, Williams 1912 [Modiomorphidae]
  • Eurynoticeras [Oppeliidae]
  • Eurynotoides, Berg 1940 [Palaeonisciformes]
  • Euryochetus [Neogastropoda]
  • Euryocrinus [Sagenocrinida]
  • Eurypholis, Pictet 1850 [Enchodontidae]
  • Euryphyllum, Hill 1937 [Hapsiphyllidae]
  • Euryplax, Stimpson 1862 [Euryplacidae]
  • Eurypneustes [Hemicidaridae]
  • Euryprion [Eunicemorpha]
  • Eurypterida, order, Burmeister 1843 [Merostomata]
  • Eurypterus [Eurypteridae]
  • Eurypthyris [Postepithyrididae]
  • Euryrizoceras, Foerste 1935 [Acleistoceratidae]
  • Eurysalenia [Salenioida]
  • Eurysaurus, Gaudry 1878 [Eosauropterygia]
  • Eurysina [Terebratulidae]
  • Eurysoria [Dyscoliidae]
  • Euryspirifer [Hysterolitidae]
  • Eurystichthys [Pachycormiformes]
  • Eurystomella [Cheilostomata]
  • Eurystomites, Schröder 1891 [Tarphyceratidae]
  • Eurystrotos [Cyclostomata]
  • Eurytellina, Fischer 1887 [Tellinidae]
  • Eurythyrhombopora [Cryptostomata]
  • Eurythyris [Centronellidae]
  • Eurytium, Stimpson 1862 [Panopeidae]
  • Eurytorus, Gardner 1947 [Turritellidae]
  • Eurytreta, Rowell 1966 [Acrotretidae]
  • Eusagenites, E. T. Tozer 1971 [Haloritidae]
  • Euscalpellum, Hoek 1907 [Calanticidae]
  • Euscobinella [Neogastropoda]
  • Euseila, Cotton 1951 [Cerithiopsidae]
  • Eusemius, Vetter 1881 [Amiiformes]
  • Eushantungoceras [Actinocerida]
  • Eusiphonella, Zittel 1878 [Stellispongiidae]
  • Eusmilia, Milne-Edwards and Haime 1848 [Meandrinidae]
  • Eusmiliopsis [Scleractinia]
  • Euspilopora [Cryptostomata]
  • Euspira, Agassiz 1837 [Naticidae]
  • Euspirocrinus, Angelin 1878 [Cladida]
  • Eustenocrinus, Ulrich 1925 [Crinoidea]
  • Eustephanella [Metacopida]
  • Eusthenoceras, Foord 1898 [Pseudorthoceratidae]
  • Eusthenopteron [Rhizodontidae]
  • Eusthenotrochus [Turbinoliidae]
  • Eustoma, Piette 1855 [Eustomatidae]
  • Eustomia [Heterostrophia]
  • Eusyringium, Haeckel 1881 [Theoperidae]
  • Eutactostomium [Hexactinosa]
  • Eutaxocrinus, F. Springer 1906 [Taxocrinidae]
  • Eutelecrinus, Wanner 1916 [Monobathrida]
  • Euthlipsurella [Podocopida]
  • Euthria, Gray 1850 [Buccinidae]
  • Euthriofusus, Cossmann 1901 [Fasciolariidae]
  • Euthydesma [Cyrtodontida]
  • Euthymella, Thiele 1929 [Triphoridae]
  • Euthymipecten [Pterioida]
  • Euthynnus, Jordan and Gilbert 1882 [Perciformes]
  • Euthynotus [Pachycormidae]
  • Euthyrachis [Archaeogastropoda]
  • Euthystylus [Neotaenioglossa]
  • Eutinochilus [Archaeogastropoda]
  • Eutrephoceras, Hyatt 1894 [Eutrephoceratidae]
  • Eutretocystis [Rhombifera]
  • Eutrichiurides, Casier 1944 [Trichiuridae]
  • Eutrigla, Fraser-Brunner 1938 [Scorpaeniformes]
  • Eutrochocrinus, Wachsmuth and Springer 1897 [Monobathrida]
  • Eutylus [Myoida]
  • Euuvigerina [Foraminifera]
  • Euxinella [Wellerellidae]
  • Euxinita [Foraminifera]
  • Euzittelia [Pharetronida]
  • Euzkadiella [Demospongea]
  • Evactinostella [Hexagonellidae]
  • Evagena, Hahn and Brauckmann 1989 [Proetida]
  • Evalea, A. Adams 1860 [Pyramidellidae]
  • Evanescirostrum [Leiorhynchidae]
  • Evanidisinurostrum [Pugnacidae]
  • Evansaspis, Kobayashi 1955 [Corynexochida]
  • Evargyrotheca [Praeargyrothecidae]
  • Evarnula, Finlay 1926 [Buccinulidae]
  • Evechinus [Echinometridae]
  • Evelynella, Laws 1940 [Pyramidellidae]
  • Evencoceras, Balashov 1960 [Intejoceratidae]
  • Evencodus [Conodontophorida]
  • Evenia [Atomodesmatidae]
  • Evenkia, Berg 1941 [Palaeonisciformes]
  • Evenkiella, Soshkina 1955 [Entelophyllidae]
  • Evenkina [Plaesiomyidae]
  • Evenkinorthis [Plectorthidae]
  • Evenkorhynchia [Trigonirhynchiidae]
  • Evermanella [Alepisauriformes]
  • Everticyclammina [Cyclamminidae]
  • Evesthes, Gilbert 1910 [Pleuronectiformes]
  • Evlanella [Palaeocopida]
  • Evlania [Foraminifera]
  • Evlanoceras, Zhuravleva 1962 [Polyelasmoceratidae]
  • Evlanovia, Egorov 1950 [Aechminellidae]
  • Evolutinella [Haplophragmoididae]
  • Evolutononion [Foraminifera]
  • Evolvocassidulina [Foraminifera]
  • Evropeites, Balashova 1966 [Pliomeridae]
  • Ewaldocoenia, Oppenheim 1921 [Stylinidae]
  • Ewekoroia, Adegoke 1977 [Diastomatidae]
  • Ewingella [Nassellaria]
  • Exaetocrinus [Cladida]
  • Exallias, Jordan and Evermann 1905 [Perciformes]
  • Exanthesis, Regnard 1926 [Dactylocalycidae]
  • Exastipyx, Holloway 1996 [Corynexochida]
  • Exatrypa [Atrypidae]
  • Excalibosaurus, McGowan 1986 [Reptilia]
  • Excavatorhynchia [Austrirhynchidae]
  • Excellichlamys, Iredale 1939 [Pectinidae]
  • Exceptothyris [Lobothyrididae]
  • Exechestoma, Cossmann 1899 [Potamididae]
  • Exechocirsus [Neotaenioglossa]
  • Exechonella [Exechonellidae]
  • Exellia, White and Moy-Thomas 1941 [Perciformes]
  • Exidomonea [Cyclostomata]
  • Exigraptus [Graptoloidea]
  • Exilia, Conrad 1860 [Ptychatractidae]
  • Exilifrons, Crickmay 1968 [Disphyllidae]
  • Exilifusus, Conrad 1865 [Fasciolariidae]
  • Exilitheca [Allathecidae]
  • Exilithecida, order, Sysoyev 1968 [Orthothecimorpha]
  • Exiloidea [Neogastropoda]
  • Exiteloceras, Hyatt 1894 [Nostoceratidae]
  • Exlessia [Neotaenioglossa]
  • Exochella [Exochellidae]
  • Exochoceras [Discosorida]
  • Exochocrinus, Burdick and Strimple 1969 [Cladida]
  • Exochoecia [Cyclostomata]
  • Exochopora [Demospongea]
  • Exochorhynchus [Sanguinolitidae]
  • Exocoetoides [Actinopterygii]
  • Exoconularia [Scyphozoa]
  • Exocrinus, Strimple 1949 [Exocrinidae]
  • Exocyrtoceras, Flower 1938 [Brevicoceratidae]
  • Exodictydia [Demospongea]
  • Exogyra, Say 1820 [Gryphaeidae]
  • Exomiliopsis [Neogastropoda]
  • Exophthalmocythere [Podocopida]
  • Exoriocrinus, Strimple and Moore 1971 [Cladida]
  • Exosiperna, Iredale 1929 [Mytilidae]
  • Exostega, Rafinesque and Clifford 1820 [Anthozoa]
  • Exotica, Lamy 1918 [Tellinidae]
  • Exotornoceras, Becker 1993 [Posttornoceratidae]
  • Expellobolus [Obolidae]
  • Experilingula [Obolidae]
  • Exputens [Pterioida]
  • Exsculptina [Foraminifera]
  • Exsulacrinus, Bowsher and Strimple 1986 [Monobathrida]
  • Extentitheca [Circothecida]
  • Exterocrinus, Knapp 1969 [Cladida]
  • Extrania, Qian 1983 [Lisaniidae]
  • Extrania [Palaeocopida]
  • Eygalierina [Foraminifera]
  • Eymarella [Phymatopleuridae]
  • Eymekops, Resser and Endo 1935 [Proasaphiscidae]
  • Ezhuangia, Qiu and Liu 1983 [Corynexochida]
  • Ezonuculana, Nagao 1938 [Nuculanidae]
  • Fabagella [Pholadomyida]
  • Fabalicypris [Bairdiidae]
  • Fabanella [Podocopida]
  • Fabella, Conrad 1863 [Sportellidae]
  • Faberoceras, Flower 1946 [Westonoceratidae]
  • Faberolasma, Bykova 1974 [Aulophyllidae]
  • Faberophyllum, Parks 1951 [Ekvasophyllidae]
  • Fabiania [Foraminifera]
  • Fabularia [Fabulariidae]
  • Fabulaspis, Ivshin 1952 [Trilobita]
  • Fabulina [Cardiida]
  • Faciledictyon [Stromatoporoidea]
  • Faciura, Rozova 1963 [Ptychopariida]
  • Facivermis, Hou and Chen 1989 [Problematica]
  • Fagesia, Pervinquiére 1907 [Vascoceratidae]
  • Fahraeusodus [Conodontophorida]
  • Failleana, Chatterton and Ludvigson 1976 [Styginidae]
  • Fainella [Anthozoa]
  • Faksephyllia, Floris 1972 [Caryophylliidae]
  • Faksethyris [Dyscoliidae]
  • Falanaspis, Tjernvik 1956 [Alsataspididae]
  • Falcatoproetus, Lutke 1990 [Proetidae]
  • Falciclymenia, Schindewolf 1923 [Rectoclymeniidae]
  • Falciferella [Oppeliidae]
  • Falciferula, Tchoumatchenco 1987 [Terebratulida]
  • Falcimytilus, Cox 1937 [Mytilidae]
  • Falcitornoceras, House and Price 1985 [Tornoceratidae]
  • Falconoplax, Van Straelen 1933 [Chasmocarcinidae]
  • Falites [Ostracoda]
  • Falkosites [Eunicemorpha]
  • Fallacites, Ruzhencev and Bogoslovskaya 1971 [Homoceratidae]
  • Fallacosteus, Long 1990 [Arthrodira]
  • Fallaticella [Palaeocopida]
  • Fallaxispirifer [Reticulariidae]
  • Fallaxoproductus [Monticuliferidae]
  • Fallocyathus [Ajacicyathida]
  • Fallotaspidella, Repina 1964 [Olenellida]
  • Fallotaspis, Hupe 1953 [Fallotaspididae]
  • Fallotella [Foraminifera]
  • Fallotia [Meandropsinidae]
  • Faloriella [Neotaenioglossa]
  • Falospongia, Rigby 1986 [Hazeliidae]
  • Falsatrypa [Atrypidae]
  • Falsicatenipora, Hamada 1958 [Halysitidae]
  • Falsicolus, Finlay 1930 [Fasciolariidae]
  • Falsifusus [Fasciolariidae]
  • Falsipollex [Palaeocopida]
  • Falsocibicides [Foraminifera]
  • Falsocythere [Podocopida]
  • Falsogaudryinella [Verneuilinidae]
  • Falsoguttulina [Foraminifera]
  • Falsopalmula [Robuloididae]
  • Falsoplanulina [Foraminifera]
  • Falsostyliola [Heterostrophia]
  • Falsostyliola [Thecosomata]
  • Falsotruncana [Foraminifera]
  • Falsurgonina [Foraminifera]
  • Falunia [Podocopida]
  • Faluniella [Heterostrophia]
  • Famatinolithus, Harrington and Leanza 1957 [Trinucleidae]
  • Famatinorthis [Giraldiellidae]
  • Famaxonia, Weyer 1971 [Stauriida]
  • Famenella [Palaeocopida]
  • Famennelasma, Weyer 1973 [Hapsiphyllidae]
  • Faniathalamia [Calcarea]
  • Fanninoceras, McLearn 1930 [Eoderoceratidae]
  • Fansycyathus [Ajacicyathida]
  • Fanulodiscus [Isorophida]
  • Faorina [Schizasteridae]
  • Farabophyllum, Lavrusevich 1971 [Phillipsastreidae]
  • Farbesiceras [Cephalopoda]
  • Farcus, Pessagno et al. 1986 [Farcidae]
  • Fardenia, Lamont 1935 [Chilidiopsidae]
  • Farisia [Cardiida]
  • Farnhamia [Hoplitidae]
  • Farquharsonia [Pedinoida]
  • Farrazia [Pholadomyida]
  • Farrea, Bowerbank 1862 [Farreidae]
  • Farreopsis [Hexactinellida]
  • Farroceras [Endocerida]
  • Fartulum, Carpenter 1857 [Caecidae]
  • Fasciatiphyllia [Scleractinia]
  • Fascicoma, Popov 1980 [Acrotretidae]
  • Fascicostella [Dalmanellidae]
  • Fasciculina [Finkelnburgiidae]
  • Fasciculinopora [Cyclostomata]
  • Fasciculipora [Cyclostomata]
  • Fasciculitubus [Tuboidea]
  • Fasciculoceras, Bogoslovsky 1969 [Teicherticeratidae]
  • Fasciculophyllum, Thomson 1883 [Antiphyllidae]
  • Fasciculus [Ctenophora]
  • Fascifera, Ulrich and Cooper 1942 [Draboviidae]
  • Fascigera [Cyclostomata]
  • Fascinewellipecten [Pterioida]
  • Fasciolaria, Lamarck 1799 [Fasciolariidae]
  • Fascioplex [Neogastropoda]
  • Fascipericyclus, Turner 1948 [Pericyclidae]
  • Fasciphyllum, Schlüter 1885 [Fasciphyllidae]
  • Fascipora [Cyclostomata]
  • Fasciseris, Alloiteau and Dercourt 1966 [Scleractinia]
  • Fascistropheodonta [Strophodontidae]
  • Fascivelvata [Archaeogastropoda]
  • Fascizetina [Dalmanellidae]
  • Fastigastocythere [Podocopida]
  • Fastigiella, Reeve 1848 [Cerithiidae]
  • Fastuoscolex [Phyllodocemorpha]
  • Fatocephalus, Duan and An 1982 [Ptychopariida]
  • Faujasia [Faujasiidae]
  • Faujasina, d'Orbigny 1839 [Nonionidae]
  • Fauraster [Faujasiidae]
  • Fautor, Iredale 1924 [Trochidae]
  • Favartia, Jousseaume 1880 [Muricidae]
  • Favelloides [Spirotrichia]
  • Faveolebris [Podocopida]
  • Favia, Oken 1815 [Faviidae]
  • Favicella [Cystoporata]
  • Favilynthus [Monocyathida]
  • Favistina, Flower 1961 [Stauriidae]
  • Favites, Link 1807 [Faviidae]
  • Favitopsis, Alloiteau 1955 [Scleractinia]
  • Favocassidulina [Foraminifera]
  • Favosichaetetes [Tabulospongida]
  • Favositella [Cystoporata]
  • Favosites, Lamarck 1816 [Favositidae]
  • Favosyringium [Nassellaria]
  • Favrella, Douvill 1909 [Neocomitidae]
  • Favria [Heterostrophia]
  • Favriella, Hornung 1920 [Turridae]
  • Favulella [Metacopida]
  • Favulina, Patterson and Richardson [Ellipsolagenidae]
  • Favusella [Favusellidae]
  • Fax, Iredale 1925 [Buccinidae]
  • Faxxia [Neotaenioglossa]
  • Fayettevillea, Gordon 1960 [Glaphyritidae]
  • Fayettoceras, Foerste 1932 [Valcouroceratidae]
  • Fedaiella, Kittl 1894 [Fedaiellidae]
  • Fedorowskicyathus, Rozkowska 1980 [Chonophyllidae]
  • Fehamya, Mergl 1983 [Orthida]
  • Fehlmannites [Oppeliidae]
  • Feifelia [Cribrospongiidae]
  • Felaniella, Dall 1899 [Ungulinidae]
  • Felinotoechia [Leiorhynchidae]
  • Felixaraea, Beauvais 1982 [Haplaraeidae]
  • Felixastraea, Oppenheim 1930 [Agariciidae]
  • Felixigyra, Prever 1909 [Faviidae]
  • Felixium, de Laubenfels 1955 [Metazoa]
  • Fellerites [Palaeocopida]
  • Fellius [Cidaroida]
  • Felsinella [Foraminifera]
  • Femerensia [Palaeocopida]
  • Feneoniana, Kolesnikov 1939 [Archaeogastropoda]
  • Fenestella, Lonsdale 1839 [Fenestellidae]
  • Fenestellata [Fenestrata]
  • Fenestepora [Fenestrata]
  • Fenesteverta [Fenestrata]
  • Fenestralia [Fenestrata]
  • Fenestrapora [Fenestrata]
  • Fenestraspis, Branisa and Vanek 1973 [Phacopida]
  • Fenestrata, order [Stenolaemata]
  • Fenestrellina [Fenestrata]
  • Fenestricardita, Casey 1961 [Carditidae]
  • Fenestrirostra, Cooper 1955 [Leiorhynchidae]
  • Fenestrocyathus, R.C. Handfield 1971 [Archaeocyathida]
  • Fenestrosyrinx [Neogastropoda]
  • Fenestrulina [Microporellidae]
  • Fengjiachonia [Cardiida]
  • Fengtaiella [Ostracoda]
  • Fengzuella, Li and Han 1980 [Trimerellidae]
  • Fenolignum [Neogastropoda]
  • Fensiangia [Problematica]
  • Fenxiangella [Clarkellidae]
  • Ferayina [Foraminifera]
  • Ferenepea, Opik 1967 [Nepeidae]
  • Ferestromatopora, Yavorsky 1955 [Ferestromatoporidae]
  • Ferganella [Machaerariidae]
  • Fergania [Pterioida]
  • Ferganoceras, Librovitch 1957 [Ferganoceratidae]
  • Ferganoproductus [Productellidae]
  • Fernandezaster [Brissidae]
  • Ferralsia, Cobbold 1935 [Ptychopariida]
  • Ferrax [Productorthidae]
  • Ferresium, Blome 1984 [Eptingiidae]
  • Ferrobolus, Havlicek 1982 [Dysoristidae]
  • Ferrya, Fromentel 1870 [Calamophylliidae]
  • Ferrythyris [Postepithyrididae]
  • Feruminops, Haas 1986 [Phacopida]
  • Feurtillia [Foraminifera]
  • Fezzanoglossa [Obolidae]
  • Ffynnonia [Platystrophiidae]
  • Fibrosopecten [Pterioida]
  • Fibula [Neotaenioglossa]
  • Fibularia, Lamarck [Fibulariidae]
  • Fibulaster [Fibulariidae]
  • Fibulella [Heterostrophia]
  • Fibulina [Laganidae]
  • Fibulistrophia [Douvillinidae]
  • Fibuloptygmatis [Heterostrophia]
  • Fibuloptyxis [Heterostrophia]
  • Ficariastraea, Alloiteau 1952 [Agatheliidae]
  • Ficheuria, Pervinquiére 1910 [Flickiidae]
  • Ficopsis, Conrad 1866 [Ficidae]
  • Fictoacteon, Stephenson 1952 [Cephalaspida]
  • Fictonoba [Barleeidae]
  • Ficulomorpha [Neogastropoda]
  • Ficulopsis [Neogastropoda]
  • Ficus, Röding 1798 [Ficidae]
  • Fidelitella [Palaeocopida]
  • Fidespirifer [Adolfiidae]
  • Fieldaspis, Rasetti 1951 [Zacanthoididae]
  • Fieldia, C. D. Walcott 1912 [Grallatoridae]
  • Fieldingaspis [Cephalaspidiformes]
  • Fieldospongia, Rigby 1986 [Anthaspidellidae]
  • Fifeocrinus, Wright 1951 [Cladida]
  • Figularia [Cribrilinidae]
  • Fijnonion [Foraminifera]
  • Fikaites [Cephalopoda]
  • Filiatrypa [Atrypidae]
  • Filicava [Cyclostomata]
  • Filicea [Cyclostomata]
  • Filiconcha [Monticuliferidae]
  • Filicrisia [Cyclostomata]
  • Filicrisina [Cyclostomata]
  • Filifascigera [Cyclostomata]
  • Filigreenia [Pugnacidae]
  • Filisparsa [Cyclostomata]
  • Filites [Fenestellidae]
  • Filodrilla [Neogastropoda]
  • Filograna, Oken 1815 [Serpulidae]
  • Filogranula [Serpulimorpha]
  • Filopecten [Entolioididae]
  • Filosina [Corbiculidae]
  • Fimbria, Mühlfeldt 1811 [Lucinidae]
  • Fimbriaria [Productellidae]
  • Fimbrinia [Productellidae]
  • Fimbriothyris [Zeilleriidae]
  • Fimbrispirifer, Cooper 1942 [Hysterolitidae]
  • Finiclymenia, Price and Korn 1989 [Gonioclymeniidae]
  • Finkelnburgia [Finkelnburgiidae]
  • Finlayella [Cardiida]
  • Finlayina [Foraminifera]
  • Finlayola [Heterostrophia]
  • Finmarchinella [Podocopida]
  • Finospirifer [Spiriferidae]
  • Fiorella [Palaeocopida]
  • Firmacidaris [Echinozoa]
  • Firmicornus [Hyolithida]
  • Fischerella [Ctenostomata]
  • Fischericardium [Cardiida]
  • Fischeriella [Archaeogastropoda]
  • Fischerina [Fischerinidae]
  • Fishericrinus [Cyrtocrinida]
  • Fissiculata, order, O. Jaekel 1918 [Blastoidea]
  • Fissidentalium, Fischer 1885 [Dentaliidae]
  • Fissilobiceras [Hammatoceratidae]
  • Fissilunula, Etheridge 1902 [Isocardiidae]
  • Fissispongia, King 1938 [Fissispongiidae]
  • Fissocephalus, Lermontova 1951 [Ptychopariida]
  • Fissocrinocythere [Podocopida]
  • Fissocythere [Podocopida]
  • Fissodus, St. John and Worthen 1875 [Janassidae]
  • Fissoelphidium [Foraminifera]
  • Fissurella, Bruguière 1789 [Fissurellidae]
  • Fissurellidea, Orbigny 1841 [Fissurellidae]
  • Fissuricella [Cheilostomata]
  • Fissurina, Reuss 1850 [Ellipsolagenidae]
  • Fissurisepta, Seguenza 1863 [Fissurellidae]
  • Fistulamina [Hexagonellidae]
  • Fistularioides, Blot 1981 [Gasterosteiformes]
  • Fistulicanta [Cystoporata]
  • Fistulimurina, Sokolov 1947 [Chaetetidae]
  • Fistuliphragma [Cystoporata]
  • Fistulipora [Fistuliporidae]
  • Fistuliporella [Cystoporata]
  • Fistuliporidra [Cystoporata]
  • Fistuliramus [Fistuliporidae]
  • Fistulisponga [Calcarea]
  • Fistulobalanus, Zullo 1984 [Balanidae]
  • Fistulocladia [Cheilotrypidae]
  • Fistulogonites [Clitambonitidae]
  • Fistulotrypa [Fistuliporidae]
  • Fitzroyella [Uncinulidae]
  • Flabellammina [Haplophragmoiidae]
  • Flabellamminopsis [Foraminifera]
  • Flabelligerimorpha, order [Polychaeta]
  • Flabellimutilis [Podocopida]
  • Flabellinella [Foraminifera]
  • Flabellipecten, Sacco 1897 [Pectinidae]
  • Flabellisphinctes [Cephalopoda]
  • Flabellispongia [Lychniscosa]
  • Flabellocephalus, Jinlin and Shaoxin 1984 [Asaphida]
  • Flabellocyclolina [Mayncinidae]
  • Flabellocyrtia [Bittnerulidae]
  • Flabellopora [Cheilostomata]
  • Flabellosmilia, Oppenheim 1930 [Meandrinidae]
  • Flabellothyris [Eudesiidae]
  • Flabellotrypa [Cyclostomata]
  • Flabellulirostrum [Uncinulidae]
  • Flabellum, Lesson 1831 [Flabellidae]
  • Flaccivelum [Palaeocopida]
  • Flacilla [Neotaenioglossa]
  • Flagellophyllum, Fan 1962 [Adamanophyllidae]
  • Flagrospira [Ammodiscidae]
  • Flaventia, Jukes-Browne 1908 [Veneridae]
  • Flectospira [Cornuspiridae]
  • Flemingia [Ostracoda]
  • Flemingites, Waagen 1892 [Flemingitidae]
  • Flemingopsis [Ostracoda]
  • Flemingostrea, Vredenburg 1916 [Ostreidae]
  • Flemmingia [Neotaenioglossa]
  • Fletcheria, Milne-Edwards and Haime 1851 [Fletcheriidae]
  • Fletcheriella, Sokolov 1955 [Fletcheriellidae]
  • Fletcherina, Lang et al. 1955 [Pycnostylidae]
  • Fletcherithyroides [Zeilleriidae]
  • Flexanulus [Ajacicyathida]
  • Flexaria [Productidae]
  • Flexathyris [Athyrididae]
  • Flexiclymenia, Czarnocki 1989 [Cymaclymeniidae]
  • Flexicollicamara [Camaroidea]
  • Flexicorbula, Chavan 1947 [Corbulidae]
  • Flexihydra [Hydroida]
  • Flexiostroma [Stromatoporoidea]
  • Flexispinites [Cephalopoda]
  • Flexopecten [Pectinidae]
  • Flexoptychites, L. F. Spath 1951 [Ptychitidae]
  • Flexuocythere [Podocopida]
  • Flexus [Podocopida]
  • Flickia [Flickiidae]
  • Flindersichthys, Longman 1932 [Elopiformes]
  • Flintinella [Hauerinidae]
  • Flobertia [Merostomata]
  • Floria, Turnsek 1981 [Actinastreidae]
  • Floribella, Woodring 1970 [Gastropoda]
  • Floridina, Jullien 1882 [Onychocellidae]
  • Floridinella [Cheilostomata]
  • Floridiscus [Isorophida]
  • Florimetis, Olsson and Harbison 1953 [Tellinidae]
  • Flosculinella [Alveolinidae]
  • Flourensina [Foraminifera]
  • Flowerites [Discosorida]
  • Floweroceras, Miller and Youngquist 1947 [Actinoceratidae]
  • Flucticularia [Serpulimorpha]
  • Fluctuaria [Linoproductidae]
  • Flugopterus [Pachycormiformes]
  • Flustra [Trepostomida]
  • Flustrella, Ehrenberg 1838 [Spumellaria]
  • Flustrella [Cheilostomata]
  • Flustrellaria [Cheilostomata]
  • Foerstecystis [Paracrinoidea]
  • Foerstediscus, Bassler 1935 [Hemicystitidae]
  • Foerstella [Lyssacinosida]
  • Foerstellites, Kobayashi 1940 [Endoceratidae]
  • Foersteoceras, Ruedemann 1925 [Brevicoceratidae]
  • Foersteotheca [Novitatidae]
  • Foerstephyllum, Bassler 1941 [Billingsariidae]
  • Folina [Neotaenioglossa]
  • Folioceras [Orthocerida]
  • Foliomena, Havlicek 1952 [Foliomenidae]
  • Follicalena [Calcarea]
  • Folliceps, Opik 1970 [Trilobita]
  • Follicrinus, Schmidt 1934 [Cladida]
  • Follicucullus, Ormiston and Babcock 1979 [Follicucullidae]
  • Follmannia [Pterioida]
  • Fomichevia, Dubatolov 1959 [Parastriatoporidae]
  • Fomichivella [Anthozoa]
  • Fomitchella, Missarzhevsky in Rozanov 1969 [Problematica]
  • Fontanelliceras, Fucini 1931 [Hildoceratidae]
  • Fontannesia [Sonniniidae]
  • Fontannesiella [Oppeliidae]
  • Fontbotia [Foraminifera]
  • Foordiceras, Hyatt in Zittel 1893 [Koninckioceratidae]
  • Foordites, Wedekind 1918 [Pinacitidae]
  • Foramenella [Palaeocopida]
  • Foraripora [Ctenostomata]
  • Foratiscala [Neotaenioglossa]
  • Forbescieras [Cephalopoda]
  • Forbescythere [Podocopida]
  • Forbesiocrinus [Sagenocrinida]
  • Forcepia [Poecilosclerida]
  • Forchhammeria, Lermontova and Chernysheva 1950 [Anomocaridae]
  • Fordaspis, Lochman 1956 [Dorypygidae]
  • Fordinia [Obolidae]
  • Foremanella [Spumellaria]
  • Foricula [Cyclostomata]
  • Forillonaria, Lesperance 1975 [Phacopida]
  • Forma [Strophomenida]
  • Formagnostus, Ergaliev 1980 [Agnostida]
  • Formanhelena [Spumellaria]
  • Formonia, Richter 1928 [Proetida]
  • Formosocyathus [Ajacicyathida]
  • Formosulus [Myoida]
  • Forolina [Stromatoporoidea]
  • Forreria [Neogastropoda]
  • Forschia [Foraminifera]
  • Forschiella [Foraminifera]
  • Forsia [Neogastropoda]
  • Forskaelena [Archaeogastropoda]
  • Forthocrinus, Wright 1942 [Cladida]
  • Fortipecten [Pectinidae]
  • Fortunella, Calzada 1985 [Basiliolidae]
  • Fossacallista, J.A. Marwick 1938 [Veneridae]
  • Fossacypraea [Neotaenioglossa]
  • Fossaphyllia [Heterocorallia]
  • Fossariopsis, Laube 1868 [Neritopsidae]
  • Fossarius [Neotaenioglossa]
  • Fossatrivia [Neotaenioglossa]
  • Fossatrypa [Punctatrypidae]
  • Fossirichterina [Myodocopida]
  • Fossopora, Etheridge 1903 [Theciidae]
  • Fossoporella, Leleshus 1965 [Theciidae]
  • Fossulites, Astre 1957 [Radiolitidae]
  • Fossundecima [Phyllodocemorpha]
  • Fosterella [Cirripedia]
  • Foulonia, Pribyl and Vanek 1985 [Phacopida]
  • Fournierechinus [Echinocystitoida]
  • Fournierella [Cephalopoda]
  • Fourtaunia [Brissidae]
  • Foveaprimitella [Palaeocopida]
  • Foveola [Obolidae]
  • Foveoleberis [Podocopida]
  • Fractoceramus [Pterioida]
  • Fragilicyathus [Archaeocyathida]
  • Fragiscutum, Whittington and Campbell 1967 [Encrinuridae]
  • Fragum, Ršding 1798 [Cardiidae]
  • Frambocythere [Podocopida]
  • Frammia, Holtedahl 1922 [Encrinuridae]
  • Francesita [Foraminifera]
  • Francocaris [Mysidacea]
  • Francopora [Cheilostomata]
  • Francovichia, Branisa 1960 [Dalmanitidae]
  • Frankiella [Chonetidae]
  • Frankites, E. T. Tozer 1971 [Trachyceratidae]
  • Franklinella [Myodocopida]
  • Franklinoceras, Flower 1957 [Ruedemannoceratidae]
  • Fransuasaecyathus [Capsulocyathida]
  • Frechastrea [Anthozoa]
  • Frechella [Trigonotretidae]
  • Frechiella [Hildoceratidae]
  • Frechites, J. P. Smith 1932 [Beyrichitidae]
  • Fredenia, Cadee and A.W. Janssen 1994 [Fasciolariidae]
  • Fredericksia [Ingelarellidae]
  • Freiastarte, Chavan 1952 [Astartidae]
  • Freixialina [Mayncinidae]
  • Freja, Liljedahl 1984 [Frejidae]
  • Fremontella, Harrington 1956 [Olenellidae]
  • Fremontoceras, Foerste 1935 [Apsidoceratidae]
  • Freneixita [Pterioida]
  • Freneixostrea [Pterioida]
  • Frenerinuroides [Phacopida]
  • Frenguelliceras [Cephalopoda]
  • Frenguelliella, A. F. Leanza 1942 [Laevitrigoniidae]
  • Frenula [Zeilleriidae]
  • Friedbergia, Rozkowska 1969 [Laccophyllidae]
  • Frigichione [Cardiida]
  • Frigidocardium, Habe 1951 [Cardiidae]
  • Friginatica, Hedley 1916 [Naticidae]
  • Frinalicyathus [Ajacicyathida]
  • Fritchaspis, Vanek 1963 [Asaphida]
  • Frithjofia, Pribyl and Vanek 1978 [Proetida]
  • Frogdenites [Otoitidae]
  • Frognaspis, Nikolaisen 1965 [Ityophoridae]
  • Frombachia [Naticopsidae]
  • Fromentellia, Ferry 1863 [Montlivaltiidae]
  • Fromentelligyra, Alloiteau 1952 [Rhipidogyridae]
  • Fromeophyllum [Anthozoa]
  • Frondicularia, Defrance 1824 [Lagenidae]
  • Frondiculinata [Foraminifera]
  • Frondilina [Foraminifera]
  • Frondina [Protonodosariidae]
  • Frondipora [Frondiporidae]
  • Frondovaginulina [Foraminifera]
  • Frostiella [Podocopida]
  • Fruehwirthia [Anthozoa]
  • Frumentella [Fusulinoidea]
  • Frurionella [Lepraliellidae]
  • Fryxellodontus [Conodontophorida]
  • Fuchouia, Resser and Endo 1935 [Dolichometopidae]
  • Fuchungopora, Lin 1963 [Gorskyitidae]
  • Fuciniceras, Haas 1913 [Hildoceratidae]
  • Fueloepicythere [Podocopida]
  • Fugleria, Reinhart 1937 [Arcidae]
  • Fuhrbergiella [Podocopida]
  • Fulcrella [Cardiida]
  • Fulcriphoria [Proschizophoriidae]
  • Fulgerca, L. W. Stephenson 1941 [Neogastropoda]
  • Fulgoraria, Schumacher 1817 [Volutidae]
  • Fulguroficus [Ficidae]
  • Fulgurofusus, Grabau 1904 [Turbinellidae]
  • Fulpia, L. W. Stephenson 1946 [Corbiculidae]
  • Fulvia, Gray 1853 [Cardiidae]
  • Fundinia [Hippuritida]
  • Fungella [Cyclostomata]
  • Fungia, Lamarck 1801 [Fungiidae]
  • Fungia (Verrillofungia), Wells 1966 [Fungiidae]
  • Fungiacara [Mytilida]
  • Fungiacyathus, Sars 1872 [Fungiacyathidae]
  • Fungiastraea, Alloiteau 1952 [Latomeandridae]
  • Funginella, d'Orbigny 1849 [Funginellidae]
  • Funginellastraea, Alloiteau 1952 [Fungiidae]
  • Fungochitina [Rhizopodea]
  • Fungocystites [Diploporita]
  • Fungulodus [Conodontophorida]
  • Funis [Neotaenioglossa]
  • Funiscala [Neotaenioglossa]
  • Furacopyge, Aribazu 1978 [Phacopida]
  • Furcacauda [Furcacudiformes]
  • Furcacudiformes, order [Pteraspidomorphi]
  • Furcalithus, Fortey and Owens 1987 [Trinucleidae]
  • Furcitella, G. A. Cooper 1956 [Strophomenidae]
  • Furnishina [Conodonta]
  • Furnishius [Conodontophorida]
  • Furo, Gistl 1848 [Furidae]
  • Fursenkoina, d'Orbigny 1846 [Fursenkoinidae]
  • Fusarchaias [Soritidae]
  • Fuscibuccinum [Neogastropoda]
  • Fuscinipyge, Ormiston 1972 [Proetidae]
  • Fuscinites [Palaeocopida]
  • Fuscinullina [Palaeocopida]
  • Fuscocardium [Cardiida]
  • Fuscoscala [Neotaenioglossa]
  • Fusella, M'Coy 1844 [Strophopleuridae]
  • Fusiaphera, Habe 1961 [Cancellariidae]
  • Fusicellaria [Cheilostomata]
  • Fusicoceras, Flower 1939 [Spyroceratidae]
  • Fusiella [Schubertellidae]
  • Fusiferella [Astrophorida]
  • Fusiguraleus, Powell 1942 [Turridae]
  • Fusimilis, L. W. Stephenson 1941 [Turridae]
  • Fusimitra, Conrad 1855 [Mitridae]
  • Fusinus, Rafinesque 1815 [Fasciolariidae]
  • Fusiptyxis [Heterostrophia]
  • Fusiteuthis [Belemnitida]
  • Fusitoma [Neogastropoda]
  • Fusitriton, Cossmann 1903 [Ranellidae]
  • Fusitron [Neotaenioglossa]
  • Fusiturricula, Woodring 1928 [Turridae]
  • Fusiturris, Thiele 1929 [Turridae]
  • Fusoficula [Ficidae]
  • Fusoidella [Neotaenioglossa]
  • Fusoterebra [Neogastropoda]
  • Fustiaria, Stoliczka 1868 [Fustiariidae]
  • Fustichitina [Rhizopodea]
  • Fusuconcharium [Problematica]
  • Fusulina, Schellwien 1898 [Fusulinidae]
  • Fusulinella [Fusulinidae]
  • Fusus, Bruguière 1789 [Fasciolariidae]
  • Futhystylus [Neotaenioglossa]
  • Fuxianhuia, Hou 1987 [Fuxianhuiidae]
  • Fyfea [Neogastropoda]
  • Fylgia [Pterioida]
  • Gabbioceras, Hyatt 1900 [Tetragonitidae]
  • Gabillytes [Dactylioceratidae]
  • Gablonzeria, Cuif 1976 [Gablonzeriidae]
  • Gabonita [Foraminifera]
  • Gabriceraurus, Pribyl and Vanek 1985 [Cheiruridae]
  • Gabriellus [Olenellidae]
  • Gabrielona, Iredale 1917 [Phasianellidae]
  • Gabrielsocyathus [Archaeocyathida]
  • Gacella [Chilidiopsidae]
  • Gadella, Lowe 1843 [Gadiformes]
  • Gadiculus, Guichenot 1850 [Gadidae]
  • Gadiformes, order, Goodrich 1909 [Actinopteri]
  • Gadila, Gray 1847 [Gadilidae]
  • Gadilina, Foresti 1895 [Gadilinidae]
  • Gadomus, Regan 1903 [Gadiformes]
  • Gaetanoceras, Ruzhencev 1938 [Agathiceratidae]
  • Gafrarium, Ršding 1798 [Veneridae]
  • Gagaria, Duncan 1889 [Temnopleuroida]
  • Gagarinicyathus [Ajacicyathida]
  • Gagaticeras [Echioceratidae]
  • Gaidropsarus, Rafinesque 1810 [Gadiformes]
  • Gaimardia, Gould 1852 [Gaimardiidae]
  • Galahetes [Trilobita]
  • Galateacrinus, Moore 1940 [Texacrinidae]
  • Galateastrophia [Strophodontidae]
  • Galathea, Fabricius 1793 [Galatheidae]
  • Galaticeras [Pleuroacanthitidae]
  • Galaxea, Oken 1815 [Oculinidae]
  • Galbanites [Cephalopoda]
  • Galeanella [Milioliporidae]
  • Galeaspis, Ivshin 1955 [Ptychopariida]
  • Galeaster [Holasteridae]
  • Galeatagypa [Gypidulidae]
  • Galeatathyris [Athyrididae]
  • Galeatella [Productidae]
  • Galeatellina, Sapelnikov and Rukavishnikova 1975 [Virgianidae]
  • Galene, De Haan 1833 [Galenidae]
  • Galenocaris [Thylacocephala]
  • Galenopsis, A. Milne-Edwards 1865 [Pilumnidae]
  • Galeocerdo, Mller and Henle 1837 [Carcharhinidae]
  • Galeodaria [Neotaenioglossa]
  • Galeodea, Link 1807 [Cassidae]
  • Galeodea (Gomphopages), Gardner 1939 [Cassidae]
  • Galeodina [Neotaenioglossa]
  • Galeodinopsis [Neotaenioglossa]
  • Galeograptus [Tuboidea]
  • Galeola [Holasteroida]
  • Galeolaria [Serpulimorpha]
  • Galeoocorys, Kuroda and Habe 1957 [Cassidae]
  • Galeopsis [Ostracoda]
  • Galeopsis [Cheilostomata]
  • Galeraster [Conulidae]
  • Galericulus [Neotaenioglossa]
  • Galeroclypeus [Echinoidea]
  • Galeropsis [Neogastropoda]
  • Galeropygus [Galeropygidae]
  • Galerosaukia, Shergold 1975 [Asaphida]
  • Galeus, Schaeffer 1760 [Scyliorhinidae]
  • Galicornus [Hyolithida]
  • Gallagnostus, Howell 1935 [Peronopsidae]
  • Galliaecystis [Cornuta]
  • Galliaecytheridea [Podocopida]
  • Galliennithyris [Postepithyrididae]
  • Galliherina [Foraminifera]
  • Gallitellia [Foraminifera]
  • Gallitellia, Cuif 1977 [Scleractinia]
  • Gallowaiina, Chen 1934 [Schubertellidae]
  • Galtoceras, Foerste 1934 [Acleistoceratidae]
  • Galwayella, Patterson and Pettis 1986 [Ellipsolagenidae]
  • Gamachignathus [Conodontophorida]
  • Gammacythere [Podocopida]
  • Gammarocrinites, Quenstedt 1857 [Cyrtocrinida]
  • Gammarus, Fabricius 1775 [Amphipoda]
  • Gammascolex [Palaeoscolecida]
  • Gamonedaspis, Branisa and Vanek 1973 [Dalmanitidae]
  • Gamonetes [Chonetidae]
  • Gamopleura [Thecosomata]
  • Gamphalosia [Leptostrophiidae]
  • Gampsurus, Von der Marck 1863 [Decapoda]
  • Ganbirretia [Holasteridae]
  • Gandinella [Ammodiscidae]
  • Ganella [Foraminifera]
  • Ganesa [Archaeogastropoda]
  • Gangadharites, C. Diener 1916 [Beyrichitidae]
  • Gangamophyllum, Gorskiy 1938 [Axophyllidae]
  • Gangshanoceras, X. P. Zou 1988 [Proteoceratidae]
  • Ganiella [Cystoporata]
  • Ganinella, Elkin 1968 [Proetida]
  • Ganloudina [Protoconodontida]
  • Gannibeyrichia [Palaeocopida]
  • Ganoessus [Clupeiformes]
  • Ganolytes, Jordan 1919 [Clupeiformes]
  • Ganopristis, Arambourg 1935 [Sclerorhynchidae]
  • Ganorhynchus [Dipteridae]
  • Gansserina [Foraminifera]
  • Gansuella [Cardiida]
  • Ganxiella [Cardiida]
  • Gaofengophyllum [Anthozoa]
  • Gaoqiaioella [Arthropoda]
  • Gaotanaspis, Zhang and Li 1984 [Ptychopariida]
  • Gaotania, Chang 1974 [Odontopleuridae]
  • Gapeevella, Gandl 1987 [Proetida]
  • Gapparodus [Protoconodontida]
  • Garantella [Foraminifera]
  • Garantiana [Parkinsoniidae]
  • Gardinerichthys [Palaeonisciformes]
  • Gardineroseris, Scheer and Pillai 1974 [Agariciidae]
  • Gardnerella, Chavan 1951 [Lucinidae]
  • Gargania [Archaeogastropoda]
  • Gargantua [Microporidae]
  • Gargasiceras, Casey 1954 [Deshayesitidae]
  • Gari, Schumacher 1817 [Psammobiidae]
  • Garniella [Palaeocopida]
  • Garniericeras [Cephalopoda]
  • Garnierisphinctes [Cephalopoda]
  • Garnotia [Neotaenioglossa]
  • Garnuella [Podocopida]
  • Garraconularia [Scyphozoa]
  • Garramites [Archaeogastropoda]
  • Garraspongia [Demospongea]
  • Garryoceras, Foerste 1928 [Orthocerida]
  • Garum [Psammobiidae]
  • Garumnaster [Holasteridae]
  • Gasconsia, Northrop 1939 [Trimerellidae]
  • Gasconsoceras, Foerste 1936 [Barrandoceratidae]
  • Gashaomiaoia, Rong Su and Li 1983 [Gypidulidae]
  • Gaspelichas, Clarke 1907 [Lichida]
  • Gaspespongia [Calcarea]
  • Gaspocyrtoceras, Foerste 1936 [Paraphragmitidae]
  • Gasteroclupea, Signeux 1964 [Clupeiformes]
  • Gasterocoma, Goldfuss 1839 [Gasterocomidae]
  • Gasterorhamphosus, Sorbini 1981 [Gasterosteiformes]
  • Gasterosteiformes, order [Actinopteri]
  • Gastrana, Schumacher 1817 [Tellinidae]
  • Gastranopsis [Cardiida]
  • Gastreochrea, Val'kov 1982 [Trilobozoa]
  • Gastrioceras, Hyatt 1884 [Gastrioceratidae]
  • Gastroammina [Saccamminidae]
  • Gastrobelus [Belemnitida]
  • Gastrochaena, Spengler 1783 [Gastrochaenidae]
  • Gastrochaenopsis [Myoida]
  • Gastroconus [Hydroconozoa]
  • Gastrocrinus, Jaekel 1895 [Cladida]
  • Gastrodetoechia [Leiorhynchidae]
  • Gastrodorus, H. von Meyer 1864 [Homolidae]
  • Gastropella [Cheilostomata]
  • Gastroplites [Hoplitidae]
  • Gastropoda, class, G. Cuvier 1797 [Mollusca]
  • Gastropolus, Whittard 1966 [Cyclopygidae]
  • Gastrosacus, Von Meyer 1851 [Galatheidae]
  • Gatagacyathus [Archaeocyathida]
  • Gattendorfia, Schindewolf 1920 [Gattendorfiidae]
  • Gattenpleura, Weyer 1976 [Gattendorfiidae]
  • Gaudryanella [Cheilostomata]
  • Gaudryceras, de Grossouvre 1894 [Gaudryceratidae]
  • Gaudryella, Patterson 1970 [Actinopteri]
  • Gaudryina, d'Orbigny 1839 [Verneuilinidae]
  • Gaudryinella [Foraminifera]
  • Gaudryinoides [Foraminifera]
  • Gaudryinopsis [Foraminifera]
  • Gaulocrinus [Sagenocrinida]
  • Gaurites, Bogoslovsky 1984 [Auguritidae]
  • Gaurocrinus, Miller 1883 [Diplobathrida]
  • Gauthieria, Lambert 1891 [Phymosomatidae]
  • Gauthiericeras, de Grossouvre 1894 [Collignoniceratidae]
  • Gauthiosoma [Phymosomatoida]
  • Gavelinella [Gavelinellidae]
  • Gavelinopsis, Hofker 1951 [Rosalinidae]
  • Gavialinum, Lortet 1892 [Teleosauridae]
  • Gaynaphyllum, Pedder 1980 [Ptenophyllidae]
  • Gazacrinus, Miller 1892 [Diplobathrida]
  • Gazameda, Iredale 1924 [Turritellidae]
  • Gazdaganites [Cephalopoda]
  • Gazimuria, Spasskiy 1960 [Anthozoa]
  • Gazolapodus, Blot 1981 [Anguilliformes]
  • Gazza, Rueppell 1835 [Perciformes]
  • Gdowia [Merostomata]
  • Gebeckeria [Palaeocopida]
  • Gebia [Decapoda]
  • Geffenina [Knoxitidae]
  • Geffenites [Palaeocopida]
  • Gegania, Jeffreys 1884 [Mathildidae]
  • Gegenella [Meekellidae]
  • Geintzina [Foraminifera]
  • Geisina [Knoxitidae]
  • Geisonoceras, Hyatt 1884 [Geisonoceratidae]
  • Geisonocerina [Orthocerida]
  • Geisonoceroides, Flower 1939 [Spyroceratidae]
  • Geisopora [Cheilostomata]
  • Geitonoceras [Nautilida]
  • Geitonograptus [Graptoloidea]
  • Gelagna, Schaufuss 1869 [Ranellidae]
  • Gelasene, Palmer 1968 [Trilobita]
  • Gelidicella [Ostracoda]
  • Gelidorthina [Giraldiellidae]
  • Gelidorthis [Giraldiellidae]
  • Gellensia [Palaeocopida]
  • Geloina, Gray 1840 [Corbiculidae]
  • Geltena, L. W. Stephenson 1946 [Mactridae]
  • Gemaspira [Neogastropoda]
  • Gemellaria [Cheilostomata]
  • Gemellides [Foraminifera]
  • Gemellipora [Cheilostomata]
  • Gemelliporella [Gemelliporellidae]
  • Gemelliporidra [Cheilostomata]
  • Gemelliporina [Cheilostomata]
  • Gemerithyris [Zeilleriidae]
  • Geminella [Cheilostomata]
  • Geminospira [Foraminifera]
  • Gemma, Deshayes 1853 [Veneridae]
  • Gemmacrinus, Prokop and Petr 1989 [Crinoidea]
  • Gemmarcula [Terebrataliidae]
  • Gemmaterebra [Neogastropoda]
  • Gemmellarocarcinus, Checchia-Rispoli 1905 [Decapoda]
  • Gemmellaroceras, Hyatt 1900 [Polymorphitidae]
  • Gemmellaroia [Heterostrophia]
  • Gemmellaroialla (Mabuti 1937) [Gemmellaroiidae]
  • Gemmoliva [Neogastropoda]
  • Gemmuloborsonia [Neogastropoda]
  • Gempylus, Cuvier 1829 [Perciformes]
  • Gemuendenaspis, Miles 1962 [Arthrodira]
  • Gemuendina, Traquair 1903 [Rhenaniformes]
  • Gemuendolepis, Gross 1973 [Acanthodii]
  • Genabacia, Milne-Edwards and Haime 1849 [Microsolenidae]
  • Genaxinus, Iredale 1930 [Thyasiridae]
  • Gendrotella [Mayncinidae]
  • Genevievella, Lochmann 1936 [Llanoaspididae]
  • Genicularia [Serpulimorpha]
  • Geniculatus [Conodontophorida]
  • Geniculicyathus [Ajacicyathida]
  • Geniculifera [Productellidae]
  • Geniculigypa [Gypidulidae]
  • Geniculina [Strophomenidae]
  • Geniculograptus [Graptoloidea]
  • Geniculomclearnites [Amphistrophiidae]
  • Genkaimurex, Kuroda 1953 [Neogastropoda]
  • Gennaeocrinus, Wachsmuth and Springer 1881 [Periechocrinitidae]
  • Genota, H. Adams and A. Adams 1853 [Turridae]
  • Gentilapsis [Trilobita]
  • Gentilia [Archiaciidae]
  • Gentoniceras [Cephalopoda]
  • Genuclymenia, Wedekind 1908 [Cymaclymeniidae]
  • Genyonemus, Gill 1862 [Perciformes]
  • Genypterus, Philippi 1857 [Ophidiiformes]
  • Geocyathus [Ajacicyathida]
  • Geodia, Lamarck 1815 [Geodiidae]
  • Geodites [Astrophorida]
  • Geoffbondia [Cardiida]
  • Geopeltis, van Regteren Altena 1949 [Teuthida]
  • Georgethyris [Reticulariidae]
  • Georgia [Neotaenioglossa]
  • Georgina [Actinocerida]
  • Georgioceras [Cephalopoda]
  • Geosaurus, G. Cuvier 1824 [Metriorhynchidae]
  • Geoteuthinus, Kretzoi 1942 [Teuthida]
  • Gephyroberyx, Boulenger 1902 [Beryciformes]
  • Gephyrophora [Cheilostomata]
  • Gephyrotes [Cribrilinidae]
  • Geragnostella, Kobayashi 1939 [Metagnostidae]
  • Geragnostus, Howell 1935 [Metagnostidae]
  • Geraldinella [Archaeaspididae]
  • Geranocephalus [Stringocephalidae]
  • Geraocrinus, Ulrich 1925 [Crinoidea]
  • Gerastos, Goldfuss 1843 [Proetidae]
  • Geratrigonia [Trigoniidae]
  • Gerbeckites [Podocopida]
  • Gergovia, Cossmann 1899 [Cancellariidae]
  • Gerkeina [Ichthyolariidae]
  • Gerkispira [Gerkispiridae]
  • Gerlus [Pterioida]
  • Germariceras, Breistroffer 1947 [Collignoniceratidae]
  • Geroldicrinus [Sagenocrinida]
  • Gerolsteinites [Reticulariidae]
  • Gerothyris [Reticulariidae]
  • Gerres, Quoy and Gaimard 1824 [Perciformes]
  • Gerrhynx [Hebetoechiidae]
  • Gerronodictyon, Bogoyavlenskaya 1969 [Gerronostromatidae]
  • Gerronostroma, Yavorsky 1931 [Gerronostromatidae]
  • Gerthia, Grabau 1928 [Polycoeliidae]
  • Gertholites, Sokolov 1955 [Pachyporidae]
  • Gerubiella [Ostracoda]
  • Gervillaria, Cox 1951 [Grallatoridae]
  • Gervilleiogoma [Pterioida]
  • Gervilleioperna, Krumbeck 1923 [Malleidae]
  • Gervillella, Waagen 1907 [Grallatoridae]
  • Gervilletia [Pterioida]
  • Gervillia, Defrance 1820 [Grallatoridae]
  • Geryon [Decapoda]
  • Gesoriacula [Podocopida]
  • Gevanites, A. Parnes 1975 [Hungaritidae]
  • Gevreya, Moret 1927 [Cribrospongiidae]
  • Geyerella [Meekellidae]
  • Geyeroceras, Hyatt 1900 [Phylloceratidae]
  • Geyeronaotia [Anthozoa]
  • Geyerophyllum, Heritsch 1936 [Geyerophyllidae]
  • Gharbouria, Gayet 1988 [Salmoniformes]
  • Gheorghianina [Nubeculariidae]
  • Giandites [Palaeocopida]
  • Gibba [Palaeocopida]
  • Gibbaster [Micrasteridae]
  • Gibbechinorhinus, Cappetta 1990 [Squaliformes]
  • Gibberella, Abushik 1958 [Leperditiidae]
  • Gibberlebeis [Podocopida]
  • Gibberostrophia [Leptostrophiidae]
  • Gibberula, Swainson 1840 [Cystiscidae]
  • Gibberulina, Monterosato 1884 [Cystiscidae]
  • Gibbithyris [Gibbithyrididae]
  • Gibbochonetes [Rugosochonetidae]
  • Gibboconcha [Bivalvia]
  • Gibbolucina, Cossmann 1904 [Lucinidae]
  • Gibbomodiola [Mytilida]
  • Gibbula, Risso 1826 [Trochidae]
  • Gibbula (Colliculus), Monterosato 1888 [Trochidae]
  • Giganticlavus [Isorophida]
  • Gigantocapulus, Hayami and Kanie 1980 [Gigantocapulidae]
  • Gigantocypraea [Neotaenioglossa]
  • Gigantogonia [Neotaenioglossa]
  • Gigantopecten [Pectinidae]
  • Gigantopora [Gigantoporidae]
  • Gigantoproductus [Monticuliferidae]
  • Gigantopygus, Hupe 1952 [Redlichiida]
  • Gigantorhynchus, V. P. Sapelnikov and A. A. Malygina 1977 [Leiorhynchidae]
  • Gigasbia [Foraminifera]
  • Gigmpeltis [Trilobita]
  • Gignouxia [Demospongea]
  • Gigoutella, Hupe 1953 [Trilobita]
  • Gilbertharrisella [Cardiida]
  • Gilbertina, Cossmann 1890 [Cephalaspida]
  • Gilbertsocrinus, Phillips 1836 [Rhodocrinidae]
  • Gilbertsonia [Pholadomyida]
  • Gilbertturricula [Neogastropoda]
  • Gillastraea, Melnikova 1983 [Cuifastraeidae]
  • Gillatia, Opik 1953 [Uncertain]
  • Gillcarcinus, Collins and Morris 1978 [Chasmocarcinidae]
  • Gillechinus [Brissidae]
  • Gillettia [Corallistidae]
  • Gillicus [Saurodontidae]
  • Gillidia, Eastman 1914 [Perciformes]
  • Gilmocrinus, Lauden 1933 [Scytalocrinidae]
  • Gilsonicaris [Branchiopoda]
  • Ginebis [Archaeogastropoda]
  • Ginella [Ostracoda]
  • Ginginella [Podocopida]
  • Ginglymostoma, Mller and Henle 1838 [Scyllidae]
  • Ginkgospongia [Demospongea]
  • Ginospina [Chancelloriida]
  • Ginsburgia [Salmoniformes]
  • Giordanella, Bornemann 1891 [Trilobita]
  • Gipsella [Ostracoda]
  • Giraffospyris, Haeckel 1881 [Triospyrididae]
  • Giraldiella [Giraldiellidae]
  • Giraliapecten [Pectinidae]
  • Giraliarella [Hyperamminoididae]
  • Giraliaster [Holasteroida]
  • Girandia, Kobayashi 1943 [Corynexochida]
  • Girardevia [Merostomata]
  • Girardotia [Pholadomyida]
  • Girlasia (de Gregorio 1930) [Aulostegidae]
  • Girtycoelia, King 1933 [Girtyocoeliidae]
  • Girtyella, Weller 1911 [Cranaenidae]
  • Girtyoceras, Wedekind 1918 [Girtyoceratidae]
  • Girtyopora [Fenestrata]
  • Girtyoporina [Fenestrata]
  • Girvanicystis [Soluta]
  • Girvanopyge, Kobayashi 1960 [Cyclopygidae]
  • Gisilina, Steinich 1963 [Chlidonophoridae]
  • Gisortia, Jousseaume 1884 [Cypraeidae]
  • Gispyrella, Laws 1937 [Pyramidellidae]
  • Gissarina [Retziellidae]
  • Gissarophyllum, Lavrusevich 1964 [Paliphyllidae]
  • Gissocrinus, Angelin 1878 [Cyathocrinitidae]
  • Gitarra, Gandl 1968 [Proetida]
  • Gitolampas [Pliolampadidae]
  • Gitonia [Serpulimorpha]
  • Gjelispinifera, Ivanova 1975 [Reticulariinidae]
  • Glabella, Swainson 1840 [Marginellidae]
  • Glabellacythere [Podocopida]
  • Glaberagnostus, Romanenko 1985 [Agnostida]
  • Glabratella [Glabratellidae]
  • Glabratellina [Glabratellidae]
  • Glabrophysodoceras [Cephalopoda]
  • Glabropilumus [Decapoda]
  • Gladigondolella [Conodontophorida]
  • Gladiobranchus, Bernacsek and Dineley 1977 [Acanthodii]
  • Gladioscutum [Ostracoda]
  • Gladiostrophia [Amphistrophiidae]
  • Glaessnerella, Wright and Collins 1975 [Longodromitidae]
  • Glamocites, C. Diener 1917 [Sandlingitidae]
  • Glandulina, d'Orbigny 1826 [Glandulinidae]
  • Glandulinoides [Foraminifera]
  • Glandulopleurostomella [Foraminifera]
  • Glans, Mühfeld 1811 [Carditidae]
  • Glansicystis [Rhombifera]
  • Glaphurella, Dean 1971 [Raymondinidae]
  • Glaphurina, Ulrich 1930 [Glaphuridae]
  • Glaphurochiton [Neoloricata]
  • Glaphurus, Raymond 1905 [Glaphuridae]
  • Glaphyocrinus [Monobathrida]
  • Glaphyraspis, Resser 1937 [Lonchocephalidae]
  • Glaphyrina, Finlay 1926 [Fasciolariidae]
  • Glaphyrites, Ruzhencev 1936 [Glaphyritidae]
  • Glaphyrocystis [Rhombifera]
  • Glarichelys, Zangerl 1958 [Cheloniidae]
  • Glassia [Glassiidae]
  • Glassina [Athyrididae]
  • Glassoceras, Ruzhencev 1960 [Vidrioceratidae]
  • Glatziella, Renz 1914 [Glatziellidae]
  • Glaucochelone, Dollo 1909 [Testudines]
  • Glaucocrinus, Parks and Alcock 1912 [Crinoidea]
  • Glaucolithites [Cephalopoda]
  • Glauconia, Stoliczka 1868 [Cassiopidae]
  • Glauconiella [Neotaenioglossa]
  • Glauconomella [Fenestrata]
  • Glaucosoma, Temminck and Schlegel 1843 [Perciformes]
  • Glaukosocrinus, Strimple 1951 [Decadocrinidae]
  • Glazewskia [Thecideidae]
  • Gleboceras, Ruzhencev 1950 [Thalassoceratidae]
  • Glenaraea [Meandrinidae]
  • Glenisteroceras, Flower 1957 [Sactorthoceratidae]
  • Glenodictyum [Porifera]
  • Glenotremites, Goldfuss 1829 [Comatulida]
  • Gleviceras, Buckman 1918 [Oxynoticeratidae]
  • Glezeria [Palaeocopida]
  • Glibertia [Cardiida]
  • Glimmatobolbina [Palaeocopida]
  • Gloassamyophorous [Hippuritida]
  • Globacrocrinus, Moore and Strimple 1969 [Monobathrida]
  • Globanomalina [Foraminifera]
  • Globatrypa [Lissatrypidae]
  • Globiconcha, d'Orbigny 1843 [Cephalaspida]
  • Globicuniculus [Foraminifera]
  • Globiella [Monticuliferidae]
  • Globigerapsis [Foraminifera]
  • Globigerina, d'Orbigny 1826 [Globigerinidae]
  • Globigerinatella, Cushman and Stainforth 1945 [Globigerinidae]
  • Globigerinatheka [Foraminifera]
  • Globigerinella [Foraminifera]
  • Globigerinelloides [Globigerinelloididae]
  • Globigerinita, Bronnimann 1951 [Globigerinidae]
  • Globigerinoides, Cushman 1927 [Globigerinidae]
  • Globigerinoidesella [Foraminifera]
  • Globigerinoita [Foraminifera]
  • Globigerinopsis [Foraminifera]
  • Globigerinopsoides [Foraminifera]
  • Globimorphina [Foraminifera]
  • Globiomorpha [Neotaenioglossa]
  • Globisinum, Marwick 1924 [Naticidae]
  • Globispirifer [Martiniidae]
  • Globispiroplectamminha [Foraminifera]
  • Globithyris [Rhipidiothyrididae]
  • Globivalvulina, Schubert 1921 [Biseriamminidae]
  • Globivenus, Coen 1934 [Veneridae]
  • Globoblastus, G. Hambach 1903 [Spiraculata]
  • Globobulimina [Buliminidae]
  • Globocardium, Hayami 1965 [Cardiidae]
  • Globocassidulina, Voloshinova 1960 [Cassidulinidae]
  • Globochernella [Foraminifera]
  • Globoconusa [Foraminifera]
  • Globodrillia [Neogastropoda]
  • Globoendothyra [Endothyridae]
  • Globofissurella [Foraminifera]
  • Globoquadrina, Finlay 1947 [Globigerinidae]
  • Globoreticulina [Soritidae]
  • Globorilida, order, Syssoiev 1957 [Calyptoptomatida]
  • Globorilus, Syssoiev 1958 [Globorilidae]
  • Globoritubulus [Globorilida]
  • Globorosalina [Foraminifera]
  • Globorotalia, Cushman 1927 [Globorotaliidae]
  • Globorotalites [Foraminifera]
  • Globorotaloides [Globorotaliidae]
  • Globosochonetes [Anopliidae]
  • Globosoproductus [Monticuliferidae]
  • Globospirillina [Foraminifera]
  • Globostroma [Sphaeractinida]
  • Globotetrataxis [Foraminifera]
  • Globotruncana [Globotruncanidae]
  • Globotruncanella [Globotruncanidae]
  • Globotruncanita [Foraminifera]
  • Globoturborotalita, Hofker 1976 [Globigerinidae]
  • Globozygia [Neotaenioglossa]
  • Globularia, Swainson 1840 [Ampullinidae]
  • Globulaspis, Reed 1931 [Odontopleurida]
  • Globuligerina [Foraminifera]
  • Globulina, d'Orbigny 1839 [Polymorphinidae]
  • Globulipora [Cyclostomata]
  • Globulirhynchia [Pugnacidae]
  • Globulocystites [Platycystitida]
  • Globulospinella [Foraminifera]
  • Globusia, H. Osmolska 1973 [Proetidae]
  • Glochiceras, Hyatt 1900 [Haploceratidae]
  • Glomalveolina [Alveolinidae]
  • Glomodiscus [Archaediscidae]
  • Glomospira, Rzehak 1895 [Ammodiscidae]
  • Glomospiranella [Foraminifera]
  • Glomospirella, Plummer 1945 [Ammodiscidae]
  • Glomospiroides [Foraminifera]
  • Glomotrocholina [Foraminifera]
  • Gloria, Egorova and Savitsky 1968 [Ptychopariida]
  • Gloriosocyathus [Ajacicyathida]
  • Gloripallium, Iredale 1939 [Pectinidae]
  • Glosia [Neotaenioglossa]
  • Glossella, Cooper 1956 [Obolidae]
  • Glosseudesia [Sellithyrididae]
  • Glosshypothyridina [Hypothyridinidae]
  • Glossinotoechia [Glossinotoechiidae]
  • Glossinulina [Hebetoechiidae]
  • Glossinulinirhynchia [Hebetoechiidae]
  • Glossinulus [Glossinotoechiidae]
  • Glossites, Hall 1885 [Modiomorphidae]
  • Glossoceras, Barrande 1865 [Ascoceratidae]
  • Glossocrinus, W. Goldring 1923 [Glossocrinidae]
  • Glossograptus [Graptoloidea]
  • Glossoidaspis [Pteraspidomorphes]
  • Glossoleptaena [Rafinesquinidae]
  • Glossomorphites [Palaeocopida]
  • Glossopleura, Poulsen 1927 [Dolichometopidae]
  • Glossorthis [Productorthidae]
  • Glossothyropsis [Notothyrididae]
  • Glossotrypa [Stenolaemata]
  • Glossus, Poli 1795 [Glossidae]
  • Glottidia, Dall 1870 [Lingulidae]
  • Glottoptychinites [Cephalopoda]
  • Glubokoevella [Foraminifera]
  • Glycera [Phyllodocemorpha]
  • Glycerites [Phyllodocemorpha]
  • Glycobtrys [Nassellaria]
  • Glycydonta [Cardiida]
  • Glycymerella, Woodring 1925 [Glycymerididae]
  • Glycymeris, Da Costa 1778 [Glycymerididae]
  • Glycymerita, Finlay and Marwick 1937 [Glycymerididae]
  • Glymmatobolbina, Harris 1957 [Zygobolbidae]
  • Glyphanodus, Davis 1883 [Petalodontidae]
  • Glypharthrus, Raasch 1939 [Aglaspididae]
  • Glyphaspellus, Ivshin 1952 [Anomocaridae]
  • Glyphaspis, Poulson 1927 [Anomocarellidae]
  • Glyphea, Von Meyer 1835 [Glypheidae]
  • Glyphidites [Thisbitidae]
  • Glyphiteuthis, Reuss 1855 [Teuthida]
  • Glyphithyreus, W. S. Macleay 1838 [Panopeidae]
  • Glyphocyphus [Glyphocyphidae]
  • Glyphopeltis, Deiss 1939 [Asaphida]
  • Glyphopneustes [Hyposaleniidae]
  • Glyphostoma, Gabb 1872 [Conidae]
  • Glyphostomella [Foraminifera]
  • Glyptacrothele [Acrothelidae]
  • Glyptagnostus, Whitehouse 1936 [Agnostidae]
  • Glyptambon, Holloway 1981 [Dalmanitidae]
  • Glyptambonites [Leptellinidae]
  • Glyptarpites [Hildoceratidae]
  • Glyptaspis, Newberry 1890 [Arthrodiriformes]
  • Glyptechinus [Temnopleuridae]
  • Glypterina, Boucot 1970 [Orthida]
  • Glyptias, Walcott 1901 [Botsfordiidae]
  • Glypticus [Arbaciidae]
  • Glyptoactis, Stewart 1930 [Carditidae]
  • Glyptoactis (Claibornicardia), Stenzel and Krause 1957 [Carditidae]
  • Glyptoactis (Fasciculicardia), Maxwell 1969 [Carditidae]
  • Glyptoceras [Cephalopoda]
  • Glyptochelone, Dollo 1903 [Cheloniidae]
  • Glyptochiton [Neoloricata]
  • Glyptochrysalis [Neotaenioglossa]
  • Glyptocidaris, A. Agassiz 1853 [Phymosomatidae]
  • Glyptoconcha [Pholadomyida]
  • Glyptoconularia [Scyphozoa]
  • Glyptoconus [Conodontophorida]
  • Glyptocrinus, Hall 1847 [Monobathrida]
  • Glyptocystella [Rhombifera]
  • Glyptocystites [Rhombifera]
  • Glyptocythere [Podocopida]
  • Glyptodendron, Claypole 1878 [Westonoceratidae]
  • Glyptodynomene, Van Straelen 1944 [Decapoda]
  • Glyptogatocythere [Podocopida]
  • Glyptograptus [Monograptidae]
  • Glyptogypa [Gypidulidae]
  • Glyptolichvinella [Podocopida]
  • Glyptomena, Cooper 1956 [Glyptomenidae]
  • Glyptometopus, Rasetti 1944 [Ptychopariida]
  • Glyptophidium, Alcock 1889 [Ophidiiformes]
  • Glyptopleurella [Palaeocopida]
  • Glyptopleurina [Knoxitidae]
  • Glyptopleuroides [Palaeocopida]
  • Glyptopomus, Agassiz 1844 [Osteolepidae]
  • Glyptopora [Cystoporata]
  • Glyptorthis, Foerste 1914 [Glyptorthidae]
  • Glyptosceptron [Pennatulacea]
  • Glyptosphaerites, Mller 1854 [Glyptosphaeritidae]
  • Glyptosphaeronites [Diploporita]
  • Glyptospirifer [Echinospiriferidae]
  • Glyptostromoides, Stearn 1983 [Stromatoporidae]
  • Glyptostyla [Fasciolariidae]
  • Glyptotoma [Neogastropoda]
  • Glyptotrophia [Huenellidae]
  • Glyptoxoceras, Spath 1925 [Diplomoceratidae]
  • Glyptozaria, Iredale 1924 [Turritellidae]
  • Gmelinmagas, Mariñelarena 1964 [Terebratellidae]
  • Gnaltacyathus [Ajacicyathida]
  • Gnathoberyx, Patterson 1967 [Beryciformes]
  • Gnathodus [Conodontophorida]
  • Gnathophis, Kaup 1860 [Anguilliformes]
  • Gnathosaurus, Meyer 1833 [Reptilia]
  • Gnidiella [Cardiida]
  • Gnorimocrinus, Wachsmuth and Springer 1879 [Taxocrinida]
  • Gobiella [Trigoniida]
  • Gochtia [Problematica]
  • Goesella [Foraminifera]
  • Goethemia [Cardiidae]
  • Gogia, Walcott 1917 [Eocrinidae]
  • Gogiida, order, Broadhead 1982 [Eocrinoidea]
  • Gogiura, Rozova and Dubatolova 1985 [Asaphida]
  • Gogoceras, Becker et al. 1993 [Ponticeratidae]
  • Gogoella, Legg 1976 [Trilobita]
  • Golasaphus, Shergold 1971 [Asaphida]
  • Golcocythere [Podocopida]
  • Golcondella [Ostracoda]
  • Goldfussitrypa [Cryptostomata]
  • Goldringia, Flower 1945 [Rutoceratidae]
  • Goleocrinus, Strimple and Watkins 1969 [Cromyocrinidae]
  • Goliathiceras [Cardioceratidae]
  • Goliathites [Cardioceratidae]
  • Gombertiphyllia [Scleractinia]
  • Gomphacanthus, Davis 1884 [Acanthodii]
  • Gomphina, Mörch 1853 [Veneridae]
  • Gomphinella [Cardiida]
  • Gomphites [Hadromerida]
  • Gomphoceras, Sowerby 1839 [Oncocerida]
  • Gomphocystites, Hall 1864 [Gomphocystitidae]
  • Gompholepis [Pteraspidomorphi]
  • Gompholites [Hyolithida]
  • Gomphomarcia [Cardiida]
  • Gomphonchus, Gross 1971 [Climatiiformes]
  • Gonambonites [Gonambonitidae]
  • Gonamispongia [Hexactinellida]
  • Gonathyris [Athyrididae]
  • Gonatocaris [Archaeostraca]
  • Gonatocyrtoceras, Foerste 1926 [Acleistoceratidae]
  • Gonatodus, Traquair 1877 [Palaeoniscidae]
  • Gonatosphaera [Nodosariidae]
  • Gondolella, Stauffer and Plummer 1932 [Polygnathidae]
  • Gondolina, Jin and Liao 1966 [Aulostegidae]
  • Gondwanella [Pterioida]
  • Gongrochanus [Faujasiidae]
  • Gongrocrinus, Burdick and Strimple 1982 [Crinoidea]
  • Gongylospongia [Reticulosa]
  • Gongylostonyx [Palaeocopida]
  • Gongylothorax, Foreman 1968 [Sethocapsidae]
  • Goniada [Phyllodocemorpha]
  • Goniagnostus, Howell 1935 [Ptychagnostidae]
  • Goniastrea, Milne-Edwards and Haime 1848 [Faviidae]
  • Goniatites, Haan 1825 [Goniatitidae]
  • Goniatitida, order, Hyatt 1884 [Cephalopoda]
  • Goniatogyra [Neotaenioglossa]
  • Gonilia [Cardiida]
  • Gonimyrtea, Marwick 1929 [Lucinidae]
  • Goniocardium [Cardiida]
  • Gonioceras, Hall 1847 [Gonioceratidae]
  • Goniochasma, Meek 1864 [Pholadidae]
  • Goniochele, T. Bell 1858 [Goniochelidae]
  • Goniochirus, Etallon 1861 [Paguridae]
  • Goniocidaris, Desor, in Agassiz & Desor 1846 [Cidaroida]
  • Goniocladia [Goniocladiidae]
  • Goniocladiella [Cystoporata]
  • Gonioclymenia, J. J. Sepkoski 2002 [Gonioclymeniidae]
  • Gonioconcha [Neotaenioglossa]
  • Goniocora, Milne-Edwards and Haime 1851 [Stylinidae]
  • Goniocornus [Hyolithida]
  • Goniocranion, Casier 1966 [Perciformes]
  • Goniocrinus, Miller and Gurley 1890 [Cladida]
  • Goniocylichna, B. Wade 1926 [Acteocinidae]
  • Goniocylindrites, Meek 1863 [Cephalaspida]
  • Goniocypoda, Woodward 1867 [Hexapodidae]
  • Goniodostomia [Heterostrophia]
  • Goniodromites, A. Reuss 1858 [Goniodromitidae]
  • Goniograptus, McCoy 1876 [Graptoloidea]
  • Gonioloboceras, Hyatt 1900 [Gonioloboceratidae]
  • Gonioloboceratoides, Nassichuk 1975 [Gonioloboceratidae]
  • Goniomya, Agassiz 1842 [Pholadomyidae]
  • Gonionaedyceras, Flower 1945 [Brevicoceratidae]
  • Gonionautilus, Mojsisovics 1902 [Gonionautilidae]
  • Gonionotites, Gemmellaro 1904 [Juvavitidae]
  • Goniophora, Phillips 1848 [Modiomorphidae]
  • Goniophoria [Rhynchotetradidae]
  • Goniophyllum, Milne-Edwards and Haime 1850 [Goniophyllidae]
  • Goniopora, Blainville 1830 [Poritidae]
  • Gonioptyxis [Neogastropoda]
  • Goniopygus, L. Agassiz 1838 [Arbaciidae]
  • Gonioseris, Duncan 1872 [Calamophylliidae]
  • Goniosigma [Temnopleuridae]
  • Goniosteus, Gross 1933 [Ptyctodontida]
  • Goniotelina, Whittington and Ross 1953 [Bathyuridae]
  • Gonioteloides, Kobayashi 1955 [Proetida]
  • Gonioteuthis [Belemnitida]
  • Goniothyropsis [Muirwoodellidae]
  • Goniotrema [Leptellinidae]
  • Goniotrypa [Cryptostomata]
  • Goniporus, Gross 1967 [Katoporididae]
  • Gonodactylus [Stomatopoda]
  • Gonolkites [Parkinsoniidae]
  • Gonoplax, Leach 1814 [Goneplacidae]
  • Gonorhynchiformes, order [Actinopteri]
  • Gonostoma, Rafinesque 1810 [Gonostomatidae]
  • Gonzagia [Heterostrophia]
  • Gonzalezaster [Spatangoida]
  • Goodallia, Turton 1822 [Astartidae]
  • Goodalliopsis [Cardiida]
  • Goodhallites, Spath 1932 [Brancoceratidae]
  • Goodradigbeeon, White 1978 [Arthrodira]
  • Goodrichthys [Ctenacanthiformes]
  • Goossensia [Cardiida]
  • Gorbachikella [Foraminifera]
  • Gorbyoceras, S. Shimizu and T. Obata 1935 [Proteoceratidae]
  • Gordonicyathus, Zhuravleva 1959 [Ajacicyathida]
  • Gordonifungia [Ajacicyathida]
  • Gordonoceras, Teichert and Glenister 1953 [Spyroceratidae]
  • Goreauiella [Tabulospongida]
  • Gorgansium, Pessagno and Blome 1980 [Pantanelliidae]
  • Gorgonichthys, Claypole 1892 [Arthrodiriformes]
  • Gorgonoceras, Zhuravleva 1961 [Lamellorthoceratidae]
  • Gorgonophontes [Stomatopoda]
  • Gorgospyris, Haeckel 1881 [Triospyrididae]
  • Gorgostrophia [Strophodontidae]
  • Gorisella [Foraminifera]
  • Gorizdronia, Rozkowska 1969 [Laccophyllidae]
  • Gorjanovicia [Radiolitidae]
  • Gorjanskya [Obolidae]
  • Goronyosaurus, Azzaroli et al. 1972 [Mosasauridae]
  • Gorskyella [Anthozoa]
  • Gorskyites, Sokolov 1955 [Gorskyitidae]
  • Gortanipora [Trepostomida]
  • Gorystrophia [Strophomenida]
  • Goryunovia [Cyclostomata]
  • Gosavia, Stolickza 1866 [Volutidae]
  • Gosaviaraea, Oppenheim 1930 [Microsolenidae]
  • Goshoraia, Tamura 1977 [Veneridae]
  • Goslinophis, Blot 1981 [Anguilliformes]
  • Gotatrypa [Atrypidae]
  • Gothicispira [Neotaenioglossa]
  • Gothocrinus, Bather 1893 [Cladida]
  • Gothograptus [Retiolitidae]
  • Goticaris [Arthropoda]
  • Gotlandechinus [Cravenechinidae]
  • Gotlandella [Platycopida]
  • Gotlandellites, K. Larsson 1979 [Gotlandellitidae]
  • Gotlandites [Eunicemorpha]
  • Gotlandochitina [Rhizopodea]
  • Gotula [Palaeocopida]
  • Goudkoffia, David 1946 [Salmoniformes]
  • Gouetina [Neotaenioglossa]
  • Gougerotia [Sacoglossa]
  • Gouldia, C. B. Adams 1847 [Veneridae]
  • Gouldoceras [Discosorida]
  • Goungjunspirifer [Ulbospiriferidae]
  • Goupillaudina [Foraminifera]
  • Gourdonia, Pillet 1954 [Phacopida]
  • Gourmya, Fischer 1884 [Cerithiidae]
  • Goycoia, Rusconi 1950 [Trilobita]
  • Grabauphyllum, Foerste 1917 [Endophyllidae]
  • Grabella [Pterioida]
  • Gracemerea, Engel and Morris 1989 [Proetida]
  • Gracianella [Atrypinidae]
  • Graciella, Rozova 1963 [Lonchocephalidae]
  • Gracilechinus [Echinidae]
  • Graciliala, N. F. Sohl 1960 [Aporrhaidae]
  • Gracilisphinctes [Perisphinctidae]
  • Gracilispira, Olsson 1956 [Olividae]
  • Gracilites, Bogoslovsky 1972 [Teicherticeratidae]
  • Graciloceras, Flower 1943 [Graciloceratidae]
  • Gracilocyathus [Cribricyathea]
  • Gracilopora, Chudinova 1964 [Pachyporidae]
  • Gracilotoechia [Ladogiidae]
  • Gracquina [Palaeocopida]
  • Graffhamicrinus, Strimple 1961 [Diphuicrinidae]
  • Graftonoceras, Foerste 1925 [Trocholitidae]
  • Gramannicythere [Protocytheridae]
  • Grambergia, Y. N. Popov 1961 [Longobarditidae]
  • Gramella [Palaeocopida]
  • Grammanotosoecia [Cyclostomata]
  • Grammascosoecia [Cyclostomata]
  • Grammatodon, Meek and Hayden 1860 [Parallelodontidae]
  • Grammatodon (Cosmetodon), Branson 1942 [Parallelodontidae]
  • Grammatodonax [Cardiida]
  • Grammatorycnus, Gill 1863 [Perciformes]
  • Grammechinus [Temnopleuridae]
  • Grammella [Membraniporidae]
  • Grammoceras [Hildoceratidae]
  • Grammolomatella [Palaeocopida]
  • Grammorhynchus [Allorhynchidae]
  • Grammothoa [Cheilostomata]
  • Grammysia, de Verneuil 1847 [Grammysiidae]
  • Grammysioidea, Williams 1916 [Grammysiidae]
  • Granatocrinus [Spiraculata]
  • Granatodontus [Conodontophorida]
  • Grandagnostus, Howell 1935 [Agnostida]
  • Grandalveolites, Mironova 1970 [Alveolitidae]
  • Grandaurispina, Muir-Wood and Cooper 1960 [Linoproductidae]
  • Grandaxinea [Glycymerididae]
  • Grandiarca, Olsson 1961 [Arcidae]
  • Grandicornus [Orthothecida]
  • Grandidiericeras [Cephalopoda]
  • Grandifavia, Babaev 1964 [Faviidae]
  • Grandioculus, Cossmann 1908 [Ptychopariida]
  • Grandiproductella [Productidae]
  • Granobrissoides [Brissidae]
  • Granocardium, Gabb 1868 [Cardiidae]
  • Grantitheca [Hyolithida]
  • Grantonia [Trigonotretidae]
  • Granula, Jousseaume 1875 [Marginellidae]
  • Granularapis [Corynexochida]
  • Granulidictyum, Schindewolf 1959 [Micheliniidae]
  • Granuliferella [Endothyridae]
  • Granuliferelloides [Foraminifera]
  • Granulina, Leleshus 1975 [Plasmoporellidae]
  • Granulina, Jousseaume 1888 [Cystiscidae]
  • Granulittorina [Neotaenioglossa]
  • Granuloagnostus, Pek 1970 [Agnostida]
  • Granulochlamys [Pectinidae]
  • Granulolabium, Cossmann 1889 [Sorbeoconcha]
  • Graphepleurus [Temnopleuridae]
  • Graphiadactyllis [Quasillitidae]
  • Graphidula, L. W. Stephenson 1941 [Fasciolariidae]
  • Graphiocrinus, de Koninck and Lehon 1854 [Graphiocrinidae]
  • Graphis [Tofanellidae]
  • Graphoceras [Graphoceratidae]
  • Graphoscyphus [Archaeocyathida]
  • Graphularia [Anthozoa]
  • Graptacme, Pilsbry 1897 [Dentaliidae]
  • Graptoblastoides [Graptolithina]
  • Graptoblastus [Graptolithina]
  • Graptocamara [Camaroidea]
  • Graptocarcinus, Roemer 1887 [Dynomenidae]
  • Graptodictya [Cryptostomata]
  • Graptogeitonia [Hydrozoa]
  • Graptolithina, class [Hemichordata]
  • Graptolodendrum [Dendroidea]
  • Graptoloidea, order, Lapworth 1875 [Graptolithina]
  • Graptopora [Cheilostomata]
  • Graptoporella [Cheilostomata]
  • Graptovermis [Rhabdopleurida]
  • Grasia [Collyritidae]
  • Grasirhynchia [Rhynchonellidae]
  • Gratagnostus, Khairullina 1975 [Agnostida]
  • Grateloupia, Des Moulins 1828 [Veneridae]
  • Gravellina [Foraminifera]
  • Gravesia [Cephalopoda]
  • Gravestockia, Reitner 1992 [Lithonida]
  • Gravia [Palaeocopida]
  • Graviscalpellum, Foster 1980 [Scalpellidae]
  • Grayiceras [Mayaitidae]
  • Grayina [Parastrophinidae]
  • Graysonites, Young 1958 [Acanthoceratidae]
  • Grazosteus, Gross 1958 [Arthrodiriformes]
  • Greenfieldia [Athyrididae]
  • Greenlandoceras [Orthocerida]
  • Greenlandoceras, Shimizu and Obata 1935 [Greenlandoceratidae]
  • Greenwoodella [Crossognathiformes]
  • Gregariella, Monterosato 1883 [Mytilidae]
  • Gregorioiscala [Neotaenioglossa]
  • Gregoryceras [Aspidoceratidae]
  • Grekoffiana [Podocopida]
  • Grenprisia, Moore 1962 [Cladida]
  • Gresslya, Agassiz 1843 [Ceratomyidae]
  • Grewgiphyllum, Oliver 1974 [Eridophyllidae]
  • Grewingkia, Dybowski 1873 [Streptelasmatidae]
  • Griesbachites, E. v. Mojsisovics 1896 [Juvavitidae]
  • Grigelis [Nodosariidae]
  • Grillina [Ichthyolariidae]
  • Grillita [Foraminifera]
  • Grimsbyoceras, Foerste 1934 [Acleistoceratidae]
  • Grimsdaleinella [Foraminifera]
  • Grinioneis [Podocopida]
  • Grinnellaspis, Poulson 1948 [Bathyuridae]
  • Griphasaphus, Opik 1967 [Asaphidae]
  • Griphocrinus, Kirk 1945 [Diplobathrida]
  • Griphodictya [Reticulosa]
  • Griphognathus [Dipteriformes]
  • Grippia, Wiman 1930 [Grippiidae]
  • Groebericeras [Olcostephanidae]
  • Groenlandaspis, Heintz 1932 [Arthrodira]
  • Groenlandibelus, Birkelund 1956 [Sepiida]
  • Groenlandophyllum, Flügel 1973 [Polycoeliidae]
  • Groenwallia [Ptychopariida]
  • Groessensia, Termier and Termier 1975 [Thecostegitidae]
  • Grorudia, Spjeldnaes 1957 [Grorudiidae]
  • Grossaspis, White and Moy-Thomas 1940 [Antiarcha]
  • Grossopterus [Eurypterida]
  • Grossouvria [Perisphinctidae]
  • Grotriania [Cardiida]
  • Gruendelella [Podocopida]
  • Gruendelicythere [Cytherissinellidae]
  • Gruenewaldia [Myophoriidae]
  • Gruenewaldtia [Palaferellidae]
  • Grumantaspis [Pteraspidomorphes]
  • Grumiphyllia, Wells 1937 [Faviidae]
  • Grundelella [Podocopida]
  • Grundensia [Cardiida]
  • Gryphaea, Lamarck 1801 [Gryphaeidae]
  • Gryphaeligmus [Pterioida]
  • Gryphaeostrea, Conrad 1865 [Gryphaeidae]
  • Gryphellina, Iredale 1929 [Limidae]
  • Gryphiswaldensia [Palaeocopida]
  • Gryphus, Megerle von Mühlfeld 1811 [Terebratulidae]
  • Grypoceras, Hyatt 1883 [Grypoceratidae]
  • Grypocrinus, Strimple 1963 [Crinoidea]
  • Grypodon [Pycnodontiformes]
  • Gryponautilus, Mojsisovics 1902 [Grypoceratidae]
  • Grypophyllum, Wedekind 1922 [Ptenophyllidae]
  • Grzegorzewskia [Nautilida]
  • Gshelia, Shtukenberg 1888 [Bothrophyllidae]
  • Gsollbergella [Ophthalmidiidae]
  • Guadalupiida, order [Demospongea]
  • Gualtieria [Brissidae]
  • Guandacolithus, Harrington and Leanza 1957 [Trinucleidae]
  • Guangdongella [Ostracoda]
  • Guangjiayanella [Permianellidae]
  • Guangshunia [Terebratulida]
  • Guangxiispirifer [Ambocoeliidae]
  • Guangyuanaspis, Lu and Chang 1974 [Redlichiida]
  • Guangyuanella, Chang 1974 [Bradoriida]
  • Guangyuanoceras [Oncocerida]
  • Guangyuanoceroides [Oncocerida]
  • Guanziyaopora, Kim and Yang 1978 [Pachyporidae]
  • Guaxa [Athyrididae]
  • Gubbera [Anthozoa]
  • Guberites [Palaeocopida]
  • Gubkinella [Foraminifera]
  • Gubkiniella [Podocopida]
  • Gubleria [Lyttoniidae]
  • Gublerina [Foraminifera]
  • Guebhardia [Bivalvia]
  • Guembelastraea, Cuif 1976 [Guembelastraeidae]
  • Guembelites, E. Mojsisovics 1896 [Juvavitidae]
  • Guembelitria [Guembelitriidae]
  • Guembelitriella [Foraminifera]
  • Guembelitrioides [Foraminifera]
  • Guerangeria, Oehlert 1880 [Modiomorphidae]
  • Guerichicaris [Archaeostraca]
  • Guerichiella [Palaeocopida]
  • Guerichina, Boucek and Prantl 1961 [Peneauiidae]
  • Guerichiphyllum, Rozkowska 1969 [Laccophyllidae]
  • Guettardicrinus [Millericrinida]
  • Guettardiscyphia, Fromentel 1860 [Cribrospongiidae]
  • Guettaria [Holasteridae]
  • Guhsania [Sonniniidae]
  • Guichenia, Henry 1968 [Dalmanitidae]
  • Guichenocarpos [Mitrata]
  • Guicyrtia [Adolfiidae]
  • Guidonia [Trochonematidae]
  • Guildfordia, Gray 1850 [Turbinidae]
  • Guildingia [Neoloricata]
  • Guilinospirifer [Dimegelasmidae]
  • Guistrophia [Areostrophiidae]
  • Guitarra [Demospongea]
  • Guizhouchaetetes [Tabulospongida]
  • Guizhouella [Monticuliferidae]
  • Guizhoupecten, Chen 1962 [Streblochondriidae]
  • Guizhoustriatopora, Chow 1978 [Pachyporidae]
  • Guizospira [Archaeogastropoda]
  • Gujaratella [Podocopida]
  • Guleilmites [Kosmoceratidae]
  • Gulielmiceras, Buckman 1920 [Kosmoceratidae]
  • Gulielmina [Kosmoceratidae]
  • Gumbycyathus [Ajacicyathida]
  • Gumina, Finlay 1928 [Pyramidellidae]
  • Gunaspis [Pteraspidomorphes]
  • Gunnarella, N. Spjeldnaes 1957 [Strophomenidae]
  • Gunnarites, Kilian and Reboul 1909 [Kossmaticeratidae]
  • Gunneropsis [Podocopida]
  • Gunningblandella [Sowerbyellidae]
  • Gunteria [Foraminifera]
  • Guppyella [Foraminifera]
  • Guraleus, Hedley 1918 [Turridae]
  • Gurieuskiella [Anthozoa]
  • Gusarella, Prozorovskaja 1962 [Gusarellidae]
  • Gustabilicrinus, Guensburg 1984 [Diplobathrida]
  • Gutnicella [Foraminifera]
  • Guttasella [Taffiidae]
  • Gutticonus [Mollusca]
  • Gutticrinus, Klikushin 1987 [Cyrtocrinida]
  • Guttulina, d'Orbigny 1839 [Polymorphinidae]
  • Gutturnium, Mörch 1853 [Ranellidae]
  • Guynia, Duncan 1837 [Guyniidae]
  • Gwynia, King 1859 [Terebratulida]
  • Gwyniella, Johanson 1987 [Terebratulida]
  • Gymnarus [Neotaenioglossa]
  • Gymnentome, Cossmann 1909 [Cassiopidae]
  • Gymnites, E. v. Mojsisovics 1882 [Gymnitidae]
  • Gymnocerithium [Neotaenioglossa]
  • Gymnocrinus, Loriol 1879 [Cyrtocrinida]
  • Gymnodiadema [Orthopsidae]
  • Gymnodiscoceras [Oppeliidae]
  • Gymnograptus [Graptoloidea]
  • Gymnolaemata, class, Allman 1856 [Bryozoa]
  • Gymnophyllum, Howell 1945 [Stauriida]
  • Gymnoplites [Cephalopoda]
  • Gymnosarda, Gill 1863 [Perciformes]
  • Gymnoscopelus, Guenther 1873 [Myctophiformes]
  • Gymnostomix, Fortey and Owens 1987 [Trinucleidae]
  • Gymnotrachelus, Dunkle and Bongert 1939 [Selenosteidae]
  • Gymnotropites, A. Hyatt and J. P. Smith 1905 [Tropitidae]
  • Gymnura, Van Hasselt 1823 [Gymnuridae]
  • Gymocetus, Romer 1966 [Sauropterygia]
  • Gypidulella [Gypidulidae]
  • Gypidulina, Rzhonsnitzkaya 1956 [Gypidulidae]
  • Gypsina, Carter 1877 [Acervulinidae]
  • Gyrgathella [Palaeocopida]
  • Gyrineum, Link 1807 [Ranellidae]
  • Gyrispongia [Lychniscosa]
  • Gyroceras [Oncocerida]
  • Gyroceratites, Meyer 1831 [Mimoceratidae]
  • Gyroclymenia [Clymeniida]
  • Gyroconulina [Foraminifera]
  • Gyrocystis [Cincta]
  • Gyrocythere [Podocopida]
  • Gyrodendron, Quenstedt 1880 [Calamophylliidae]
  • Gyrodes, Conrad 1860 [Naticidae]
  • Gyrodes (Sigaretopsis), Cossmann 1888 [Naticidae]
  • Gyroidina, d'Orbigny 1826 [Rotaliidae]
  • Gyroidinella [Foraminifera]
  • Gyroidinoides [Rotaliidae]
  • Gyrolepidoides, Cabrera 1944 [Palaeonisciformes]
  • Gyrometopus, Jaanusson 1975 [Phacopida]
  • Gyronaedyceras, Flower 1945 [Brevicoceratidae]
  • Gyropeltus [Pteraspidomorphi]
  • Gyroplacosteus, Obrutschev 1930 [Arthrodiriformes]
  • Gyropleura, Douvill 1887 [Monopleuridae]
  • Gyroptychius, M'Coy 1848 [Rhizodontidae]
  • Gyroscala, de Boury 1887 [Epitoniidae]
  • Gyroselenella, Li 1985 [Trimerellidae]
  • Gyrosoria, Cooper 1973 [Cancellothyrididae]
  • Gyrostrea, Mirkamalov 1963 [Gryphaeidae]
  • Gyrothyris, Thomson 1918 [Terebratellidae]
  • Gyrotropis [Neotaenioglossa]
  • Gyrovalvulina [Foraminifera]
  • Gythemon, Casey 1952 [Arcticidae]
  • Haasia, Yuan 1988 [Proetidae]
  • Habanaster [Holasteroida]
  • Habelia [Arthropoda]
  • Habonucula, Singh and Kanjilal 1977 [Praenuculidae]
  • Habrocephalus, Repina 1964 [Ptychopariida]
  • Habrocythere [Podocopida]
  • Habrostroma, Fagerstrom 1982 [Coenostromatidae]
  • Hacobjanella [Hippuritida]
  • Hacobjania, Aliev & Lysenko 1986 [Cephalaspida]
  • Hacquetia, Szajnocha 1886 [Clupeiformes]
  • Haddonia [Lituolidae]
  • Hadimopanella, Gedik 1977 [Palaeoscolecidae]
  • Hadoceras, Strand 1934 [Tripteroceratidae]
  • Hadoprion [Eunicemorpha]
  • Hadragnostus, Opik 1967 [Agnostidae]
  • Hadriania, Bucquoy et al. 1882 [Muricidae]
  • Hadroblastus, R. O. Fay 1962 [Phaenoschismatidae]
  • Hadrochthus [Isorophida]
  • Hadrocrinus, Lyon 1869 [Monobathrida]
  • Hadrocystis [Rhombifera]
  • Hadrodiscus [Isorophida]
  • Hadrodontina [Ellisoniidae]
  • Hadrohybus, Raymond 1925 [Phacopida]
  • Hadromerida, order, Topsent 1898 [Demospongea]
  • Hadromeros, Lane 1971 [Cheiruridae]
  • Hadrophyllum, Milne-Edwards and Haime 1850 [Hadrophyllidae]
  • Hadrorhynchia [Hadrorhynchiidae]
  • Hadrosia [Sellithyrididae]
  • Hadrosteus, Gross 1932 [Arthrodiriformes]
  • Hadrotatorhynchus [Leiorhynchidae]
  • Hadrotreta, Rowell 1966 [Acrotretidae]
  • Hadyrhyncha [Rozmanariidae]
  • Haeggochiton [Scanochitonidae]
  • Haenleinia [Pterioida]
  • Haerella [Foraminifera]
  • Haereticotaxocrinus, Franzen 1981 [Taxocrinida]
  • Haeretocrinus, Moore and Pulmmer 1940 [Scytalocrinidae]
  • Haeuslerella [Textulariidae]
  • Haffnericambria [Maxillopoda]
  • Hagenowella [Foraminifera]
  • Hagenowia [Holasteridae]
  • Hagenowina [Foraminifera]
  • Hagenowinella [Cheilostomata]
  • Hagiastrum, Haeckel 1881 [Hagiastridae]
  • Hahazimania [Neotaenioglossa]
  • Haidingerites, E. v. Mojsisovics 1893 [Ceratitida]
  • Haileyia [Polychaeta]
  • Haimasiella [Foraminifera]
  • Haimea [Oligopygidae]
  • Haimeina [Ctenostomata]
  • Haimesiphyllia, Alloiteau 1957 [Faviidae]
  • Hainbergia [Coelacanthiformes]
  • Hainosaurus, Dollo 1885 [Mosasauridae]
  • Hajulia, Woodward 1942 [Anguilliformes]
  • Halenia [Foraminifera]
  • Halesium, Pessagno 1971 [Patulibracchiidae]
  • Halia, Risso 1926 [Volutidae]
  • Halianassa [Dugongidae]
  • Halicalyptra, Dumitrica 1973 [Dictyochaceae]
  • Halice [Decapoda]
  • Halichondrites, Walcott 1920 [Halichondritidae]
  • Halicyne [Cyclidae]
  • Halidictyum [Spumellaria]
  • Halilucites, C. Diener 1905 [Ceratitidae]
  • Halina [Astrophorida]
  • Haliomma, Ehrenberg 1838 [Spumellaria]
  • Haliophis, Rueppell 1829 [Perciformes]
  • Haliotiomorpha [Archaeogastropoda]
  • Haliotis, Linnaeus 1758 [Haliotidae]
  • Haliotis (Sulculus), Adams and Adams 1854 [Haliotidae]
  • Haliphoebus [Neotaenioglossa]
  • Haliphormis [Nassellaria]
  • Halisaurus, O. C. Marsh 1869 [Mosasauridae]
  • Halistylus, Dall 1890 [Trochidae]
  • Halkyardia [Foraminifera]
  • Halla [Eunicemorpha]
  • Hallatia [Palaeocopida]
  • Hallia, Milne-Edwards and Haime 1850 [Halliidae]
  • Hallicystis [Rhombifera]
  • Hallidaya [Cyclozoa]
  • Halliella, Ulrich 1891 [Beyrichiidae]
  • Hallina [Anazygidae]
  • Hallinetes [Chonetidae]
  • Hallirhoa, Lamouroux 1821 [Siphoniidae]
  • Halloceras, Hyatt 1884 [Rutoceratidae]
  • Hallocrinus, Goldring 1923 [Cladida]
  • Hallodictya [Reticulosa]
  • Hallograptus [Graptoloidea]
  • Hallopora [Trepostomida]
  • Halloporina [Amplexoporidae]
  • Hallotheca, Malinky et al. 1987 [Hyolithidae]
  • Halloysia [Neotaenioglossa]
  • Hallstadtia [Neotaenioglossa]
  • Hallucigenia, S. Conway Morris 1977 [Onychophora]
  • Halobia, Bronn 1830 [Halobiidae]
  • Halochitina [Rhizopodea]
  • Halogetocrinus, Strimple and Moore 1971 [Ampelocrinidae]
  • Haloginella [Neogastropoda]
  • Halomitra, Dana 1846 [Fungiidae]
  • Halonympha, Dall and Smith 1886 [Cuspidariidae]
  • Halorella, Bittner 1884 [Halorellidae]
  • Halorelloidea [Halorellidae]
  • Halorites, E. v. Mojsisovics 1879 [Haloritidae]
  • Halysicyathus [Ajacicyathida]
  • Halysiocrinus, Ulrich 1886 [Calceocrinidae]
  • Halysitastraea, O. F. Geyer 1968 [Cladophylliidae]
  • Halysites, von Waldheim 1828 [Halysitidae]
  • Hamacantha [Poecilosclerida]
  • Hamacuna, Cotton 1931 [Condylocardiidae]
  • Hamarilopora, Le Maître 1956 [Favositidae]
  • Hamarodus [Conodontophorida]
  • Hamashania, Kobayashi 1941 [Trilobita]
  • Hamatoconus [Mollusca]
  • Hamatolenus, Hupe 1952 [Ellipsocephalidae]
  • Hamburgia [Cranaenidae]
  • Hameaschmidtella [Ostracoda]
  • Hamiroproetus, Snajdr 1977 [Proetidae]
  • Hamites, Parkinson 1811 [Hamitidae]
  • Hamiticeras [Ancyloceratidae]
  • Hamitoides [Cephalopoda]
  • Hamlingella (Reed 1943) [Araksalosiidae]
  • Hamlinia, Boehm 1900 [Cephalaspida]
  • Hammannopyge, Pribyl and Vanek 1985 [Phacopida]
  • Hammatoceras [Hammatoceratidae]
  • Hammatocyclus, Schindewolf 1951 [Pericyclidae]
  • Hammatocythere [Podocopida]
  • Hammatopsis [Polychaeta]
  • Hamodus [Coelacanthiformes]
  • Hamptonia, Walcott 1920 [Hamptoniidae]
  • Hamptoniella, Wenz 1938 [Acmaeidae]
  • Hamulina [Hamulinidae]
  • Hamulinites, Paquier 1900 [Leptoceratoididae]
  • Hamulus [Serpulimorpha]
  • Hamusella, Val'kov 1987 [Cyrtonellida]
  • Hamusina, Gemmellaro 1878 [Cirridae]
  • Hanaeproductus [Monticuliferidae]
  • Hanaiborchella [Podocopida]
  • Hanaiceratina [Podocopida]
  • Hanaicythere [Podocopida]
  • Hanaites [Palaeocopida]
  • Hanburia [Arthropoda]
  • Hanchiangella, Huo 1956 [Archaeocopida]
  • Hanchungolithus, Lu 1956 [Trinucleidae]
  • Hanetia, Jousseaume 1880 [Buccinidae]
  • Hanielites, O. Welter 1922 [Kashmiritidae]
  • Hanilepis, Wang and Dong 1989 [Climatiiformes]
  • Hanivella [Ptychopariida]
  • Haniwa, Kobayashi 1933 [Remopleurididae]
  • Haniwoides, Kobayashi 1953 [Ceratopygidae]
  • Hanjiangaspis, Zhou and Xiang 1993 [Proetida]
  • Hankaxis, Birenheide 1978 [Ptenophyllidae]
  • Hanleya, Gray 1857 [Hanleyidae]
  • Hanostaffella [Foraminifera]
  • Hansenisca [Foraminifera]
  • Hansotreta [Acrotretidae]
  • Hantkeniceras [Phylloceratidae]
  • Hantkenina [Foraminifera]
  • Hanusia [Cornuta]
  • Hanusitrypa [Atrypidae]
  • Hanzawaia, Asano 1944 [Gavelinellidae]
  • Haoella [Foraminifera]
  • Hapalocrinus, Jaekel 1895 [Hapalocrinidae]
  • Hapalorbis [Tornidae]
  • Haplacanthus, Agassiz 1845 [Acanthodida]
  • Haplaraera (Milaschewitsch 1876) [Astraraeidae]
  • Haplentactinia, Foreman 1963 [Entactinaria]
  • Haplistion, Young and Young 1877 [Haplistiidae]
  • Haplobolbina [Palaeocopida]
  • Haplocephalopora [Cheilostomata]
  • Haploceras, Zittel 1870 [Haploceratidae]
  • Haplocochlias, Carpenter 1864 [Turbinidae]
  • Haplocrinites, Troost 1850 [Haplocrinitidae]
  • Haplocytheridea [Podocopida]
  • Haplodiacanthus, Nazarov and Rudenko 1981 [Follicucullidae]
  • Haplograptus [Graptolithina]
  • Haplohelia, Reuss 1864 [Oculinidae]
  • Haplolasma, Semenoff-Tian-Chansky 1974 [Aulophyllidae]
  • Haplolepis, Miller 1892 [Palaeonisciformes]
  • Haplooecia [Cyclostomata]
  • Haplophragmella [Foraminifera]
  • Haplophragmina [Foraminifera]
  • Haplophragmium [Ammobaculinidae]
  • Haplophragmoides, Cushman 1910 [Haplophragmoiidae]
  • Haplophrentis [Hyolithida]
  • Haplophylloceras [Phylloceratitida]
  • Haplopleuroceras [Hammatoceratidae]
  • Haplopoma [Cheilostomata]
  • Haplopomella [Cheilostomata]
  • Haploprimitia [Palaeocopida]
  • Haploptyxis [Heterostrophia]
  • Haploscaphites [Cephalopoda]
  • Haplosclerida, order [Demospongea]
  • Haplosphaeronis, Jaekel 1926 [Sphaeronitidae]
  • Haplospirifer [Strophopleuridae]
  • Haplothecia, Frech 1885 [Disphyllidae]
  • Haplotrypa [Cystoporata]
  • Haplovoluta [Neogastropoda]
  • Hapsidocare, Shergold 1975 [Corynexochida]
  • Hapsidopora [Cheilostomata]
  • Hapsiphyllum, Simpson 1900 [Hapsiphyllidae]
  • Hapsizaphrentis [Anthozoa]
  • Haptaphyllina [Heterocorallia]
  • Haptophyllum, Pedder 1967 [Petraiidae]
  • Hardaghia [Hippuritida]
  • Hardieopterus [Hardieopteridae]
  • Hardmanoceras, Teichert and Glenister 1952 [Trocholitidae]
  • Hardyia, Walcott 1924 [Missisquoiidae]
  • Hardyoides, Kobayashi 1938 [Norwoodiidae]
  • Harengula, Cuvier and Valenciennes [Clupeiformes]
  • Haresiceras [Cephalopoda]
  • Harfordia [Neogastropoda]
  • Harginisulcus [Palaeocopida]
  • Harknessella [Harknessellidae]
  • Harmatia [Neogastropoda]
  • Harmatosia [Sellithyrididae]
  • Harmeria [Neotaenioglossa]
  • Harmeriella [Ctenostomata]
  • Harmostocrinus, Strimple 1975 [Cladida]
  • Harpa, Röding 1798 [Harpidae]
  • Harpabollia [Palaeocopida]
  • Harpacodus, St. John and Worthen 1875 [Petalodontidae]
  • Harpactocarcinus, A. Milne-Edwards 1862 [Zanthopsidae]
  • Harpactoxanthopsis, Via 1959 [Zanthopsidae]
  • Harpago [Neotaenioglossa]
  • Harpagodes [Neotaenioglossa]
  • Harpella, H. Adams and A. Adams 1858 [Volutidae]
  • Harperopsis [Podocopida]
  • Harpesoides, Koroleva 1978 [Ptychopariida]
  • Harpidella, McCoy 1849 [Aulacopleuridae]
  • Harpides, Beyrich 1846 [Harpididae]
  • Harpidium, Kirk 1925 [Pentameridae]
  • Harpidoides [Ptychopariida]
  • Harpoceras [Hildoceratidae]
  • Harpoceratoides [Hildoceratidae]
  • Harpohildoceras [Hildoceratidae]
  • Harpula, Swainson 1840 [Volutidae]
  • Harrelicrinus [Monobathrida]
  • Harrellicrinus, Arendt and Broadhead 1982 [Cladida]
  • Harriotta, Goode and Bean 1895 [Chimaeriformes]
  • Harrisianella, Olson 1929 [Potamididae]
  • Harrisoceras, Flower 1939 [Geisonoceratidae]
  • Harrycaris [Concavicarida]
  • Harrytoombsia, Miles and Dennis 1979 [Arthrodira]
  • Hartmanina [Catenispongiidae]
  • Hartshillia, Illing 1914 [Corynexochidae]
  • Hartshillina, Lake 1940 [Ptychopariida]
  • Harttella [Cranaenidae]
  • Harttites [Problematica]
  • Hartungia, Bronn 1861 [Janthinidae]
  • Hartwellia, Kitchin 1926 [Arcticidae]
  • Haruspex [Orthocerida]
  • Hastacypris [Podocopida]
  • Hastagnostus, Howell 1937 [Agnostida]
  • Hastatellina [Palaeocopida]
  • Hastigerina, Thomson 1876 [Globorotaliidae]
  • Hastigerinella [Foraminifera]
  • Hastigerinoides [Foraminifera]
  • Hastigerinopsis [Foraminifera]
  • Hastimima [Eurypterida]
  • Hastiremopleurides, Yin 1980 [Asaphida]
  • Hastites [Hastitidae]
  • Hastula, H. Adams and A. Adams 1853 [Terebridae]
  • Haswellia [Cheilostomata]
  • Hataiyoldia [Sareptidae]
  • Hatangeus [Palaeocopida]
  • Hatangia, Egorova and Savitsky 1968 [Ptychopariida]
  • Hatasia [Myoida]
  • Hatayin [Hippuritida]
  • Hatchericeras, Stanton 1901 [Neocomitidae]
  • Hattonia, Jones 1927 [Favositidae]
  • Hattopsis [Phymosomatoida]
  • Hauericeras, de Grossouvre 1894 [Desmoceratidae]
  • Hauerina, d'Orbigny 1839 [Miliolidae]
  • Hauerites, E. v. Mojsisovics 1893 [Tibetitidae]
  • Haugia [Phymatoceratidae]
  • Haumea [Pterioida]
  • Haumuriaegla, Feldmann 1984 [Aeglidae]
  • Haupiria, MacKinnon 1983 [Kutorginidae]
  • Haurakia [Neotaenioglossa]
  • Haurania [Spirocyclinidae]
  • Haustator (Monfort 1810) [Turritellidae]
  • Haustellum, Schumacher 1817 [Muricidae]
  • Hautura [Neogastropoda]
  • Havlicekella [Leiorhynchidae]
  • Havlicekia [Cyrtiidae]
  • Hawaiarca, Dall et al. 1938 [Arcidae]
  • Hawthorneachiton [Polyplacophora]
  • Hayasakaia, Lang et al. 1940 [Tetraporellidae]
  • Hayasakaina [Staffellidae]
  • Haydenia [Neotaenioglossa]
  • Haydenoceras, Flower 1949 [Barrandoceratidae]
  • Haynesina [Foraminifera]
  • Hazelia, Walcott 1920 [Hazeliidae]
  • Hazelina [Podocopida]
  • Healdia [Healdiidae]
  • Healdiacypris [Podocopida]
  • Healdianella [Healdiidae]
  • Healdioides [Metacopida]
  • Hebediscina, Rasetti 1972 [Agnostida]
  • Hebediscus, Whitehouse 1936 [Hebediscidae]
  • Hebellum [Palaeocopida]
  • Hebertella, J. Hall and J.M. Clarke 1892 [Plectorthidae]
  • Hebertocaris, Stumm and Chilman 1969 [Archaeostraca]
  • Hebeseila [Neotaenioglossa]
  • Hebeticrinus [Comatulida]
  • Hebetoceras, Flower 1941 [Hebetoceratidae]
  • Hebetoechia [Hebetoechiidae]
  • Hebetoxyites [Strigoceratidae]
  • Hebra, H. Adams and A. A 1853 [Buccinidae]
  • Hebukophyllum [Anthozoa]
  • Hecatoceras, Teichert and Glenister 1952 [Westonoceratidae]
  • Hechticythere [Podocopida]
  • Hechtina [Nubeculariidae]
  • Hecia, J. J. Sepkoski 2002 [Decapoda]
  • Heckericyathus [Ajacicyathida]
  • Heckericystis [Soluta]
  • Hecticoceras, Bonarelli 1893 [Oppeliidae]
  • Hectioceras [Cephalopoda]
  • Hectioceratoides [Oppeliidae]
  • Hedbergella [Hedbergellidae]
  • Hedecardium, Marwick 1944 [Cardiidae]
  • Hedeinopsis [Hedeinopsidae]
  • Hedeliastraea [Scleractinia]
  • Hedenstroemia, Waagen 1895 [Hedenstroemiidae]
  • Hederopsis [Cyclostomata]
  • Hedinaspis, Troedsson 1951 [Ceratopygidae]
  • Hedraites [Cornuspiridae]
  • Hedstroemia, Pribyl and Vanek 1978 [Proetidae]
  • Hedstroemina, B. B. Bancroft 1929 [Rafinesquinidae]
  • Hedstroemoceras, A. A. Foerste 1930 [Baltoceratidae]
  • Hefriga, Munster 1839 [Decapoda]
  • Heftastylis [Axinellida]
  • Hefteria [Trigoniida]
  • Hegleria, Nazarov and Ormiston 1985 [Pseudolitheliidae]
  • Heida [Heterostrophia]
  • Heilprinia, Grabau 1900 [Fasciolariidae]
  • Heimia, Haas 1890 [Postepithyrididae]
  • Heinia [Podocopida]
  • Heintzella, Fedorowski 1967 [Kleopatrinidae]
  • Heintzichthys, Whitley 1933 [Arthrodiriformes]
  • Heinzia [Cephalopoda]
  • Helaspis [Productellidae]
  • Helcion, Montfort 1810 [Patellidae]
  • Helcionelloida, class, J.S. Peel 1991 [Mollusca]
  • Helenathyris [Athyrididae]
  • Helenia, Walcott 1889 [Hyolithidae]
  • Helenifore, Nazarov and Ormiston 1983 [Ceratoikiscidae]
  • Helenolepis, Karartajüté-Talimaa 1978 [Katoporididae]
  • Helenolites, Chekhovich 1977 [Proporidae]
  • Helenopora [Helenoporidae]
  • Helentappanella [Miliolidae]
  • Helepagetia, Jell 1975 [Agnostida]
  • Helgolandichthys, Taverne 1981 [Salmoniformes]
  • Heliacus, d'Orbigny 1842 [Architectonicidae]
  • Helicacanthus [Archaeogastropoda]
  • Helicancylus [Ancyloceratidae]
  • Helicaulax [Neotaenioglossa]
  • Helichthys, Broom 1909 [Redfieldiidae]
  • Helicocrinus [Crinoidea]
  • Helicocryptus, d'Orbigny 1850 [Ataphridae]
  • Helicocyclus, Schindewolf 1951 [Pericyclidae]
  • Helicodictya [Reticulosa]
  • Helicolepidina [Foraminifera]
  • Helicoplacoidea, class, Durham and Caster 1963 [Echinodermata]
  • Helicoplacus, Durham and Caster 1963 [Helicoplacidae]
  • Helicopora [Fenestrata]
  • Helicorbitoides [Foraminifera]
  • Helicostegina [Foraminifera]
  • Helicosteginopsis [Foraminifera]
  • Helictites, E. v. Mojsisovics 1893 [Thetiditidae]
  • Helieranella, Baldis and Gonzalez 1984 [Ptychopariida]
  • Heligmina [Pterioida]
  • Heligmope [Neotaenioglossa]
  • Heligmopsis [Pterioida]
  • Heligmostylus [Neotaenioglossa]
  • Heligmotenia [Neogastropoda]
  • Heligothyris [Terebratulida]
  • Heliocephalus, Delo 1935 [Phacopida]
  • Heliocidaris [Echinoida]
  • Heliocladus [Spumellaria]
  • Heliocrinites, Eichwald 1840 [Caryocystitidae]
  • Heliocryptocapsa, Dumitrica 1970 [Sethocapsidae]
  • Heliocythere [Podocopida]
  • Heliodiscus, Haeckel 1862 [Heliodiscidae]
  • Helioentactinia, Nazarov 1975 [Entactiniidae]
  • Heliofungia, Wells 1966 [Fungiidae]
  • Helioharpes, Pribyl and Vanek 1981 [Harpetidae]
  • Heliolites, Dana 1846 [Heliolitidae]
  • Heliomedusa, Sun and Hou 1987 [Disciniidae]
  • Heliomera, Raymond 1905 [Cheiruridae]
  • Heliophyllum, Hall 1846 [Zaphrentidae]
  • Helioplasma, Kettnerova 1933 [Heliolitidae]
  • Helioplasmolites, Chekhovich 1955 [Heliolitidae]
  • Heliopora [Helioporacea]
  • Helioporacea, order [Anthozoa]
  • Helioproetoides, Yuan 1988 [Proetida]
  • Helioproetus, Richter 1919 [Proetidae]
  • Heliopyge, W. Haas and H. Mensink 1970 [Acastidae]
  • Heliosaturnalis, Kozur and Mostler 1972 [Saturnalidae]
  • Helioseris, Milne-Edwards and Haime 1849 [Agariciidae]
  • Heliosocrinus, Strimple 1951 [Stellarocrinidae]
  • Heliosoma [Spumellaria]
  • Heliosphaera, Haeckel 1860 [Astrosphaeridae]
  • Heliospongia, Girty 1908 [Heliospongiidae]
  • Heliostylina [Scleractinia]
  • Heliostylus, Haeckel 1881 [Coccodiscidae]
  • Heliotrypa [Cryptostomata]
  • Helix [Cheilostomata]
  • Helixotionella [Cheilostomata]
  • Helladophyllia [Scleractinia]
  • Hellebardia [Podocopida]
  • Hellenocyclina [Foraminifera]
  • Hellerocaris, Van Straelen 1924 [Coleiidae]
  • Helloceras [Caryophylliidae]
  • Helmersenia [Siphonotretidae]
  • Helmetia [Arthropoda]
  • Helminthidium, Lindström 1882 [Calostylidae]
  • Helminthochiton, Salter 1846 [Lepidopleuridae]
  • Helminthophyllum, Schrammen 1937 [Helminthophyllidae]
  • Heloceras, Eichwald 1860 [Orthocerida]
  • Heloclema [Cryptostomata]
  • Helodiadema [Diadematoida]
  • Helopora [Cryptostomata]
  • Heloraphinia, Schrammen 1937 [Carterellidae]
  • Heloringulum [Nassellaria]
  • Helotholus [Nassellaria]
  • Helvetella [Terebrataliidae]
  • Helveticosaurus, Peyer 1955 [Helveticosauridae]
  • Helvetoglobatruncana [Foraminifera]
  • Hemeaschnidtella [Palaeocopida]
  • Hemerocoetes, Cuvier and Valenciennes 1837 [Perciformes]
  • Hemeschara [Cheilostomata]
  • Hemiaechminoides [Palaeocopida]
  • Hemiarges, Gürich 1901 [Lichidae]
  • Hemiaulacophyllum, Kravtsov 1975 [Disphyllidae]
  • Hemibaculites [Heteroceratidae]
  • Hemibarrandia, Prantl and Pribyl 1949 [Panderiidae]
  • Hemibashkirella [Fenestrata]
  • Hemibeloitoceras [Oncocerida]
  • Hemibrachiocrinus, Arendt 1968 [Cyrtocrinida]
  • Hemicara [Nucleolitidae]
  • Hemicellaria [Cyclostomata]
  • Hemicerithium, Cossmann 1893 [Cerithiidae]
  • Hemichenopus [Neotaenioglossa]
  • Hemichoanella, Teichert and Glenister 1954 [Ellesmeroceratidae]
  • Hemichonetes, Racheboeuf 1981 [Strophochonetidae]
  • Hemichordata, phylum, Bateson 1885 [Ambulacraria]
  • Hemiconus [Conidae]
  • Hemicorbicula [Cardiida]
  • Hemicosciniopsis [Cheilostomata]
  • Hemicosmites, Buch 1840 [Hemicosmitidae]
  • Hemicosmorthoceras, Ristedt 1968 [Sphaerorthoceratidae]
  • Hemicricus [Tentaculitida]
  • Hemicrinus, Orbigny 1850 [Cyrtocrinida]
  • Hemicryptocapsa, Tan Sin Hok 1927 [Williriedellidae]
  • Hemicyclammina [Foraminifera]
  • Hemicyclaspis [Atelaspidiformes]
  • Hemicyclonosta [Cardiida]
  • Hemicyclopora [Escharellidae]
  • Hemicyprideis [Podocopida]
  • Hemicystites, Hall 1852 [Hemicystitidae]
  • Hemicythere [Podocopida]
  • Hemicytheria [Podocopida]
  • Hemicytheridea, Kingma 1948 [Cytheridae]
  • Hemicytherura, Elofson 1941 [Cytheruridae]
  • Hemidiadema [Glyphocyphidae]
  • Hemidiscella [Ammodiscidae]
  • Hemidiscosa, order, Schrammen 1924 [Hexactinellida]
  • Hemidiscus [Ammodiscidae]
  • Hemidonax, Mörch 1871 [Donacidae]
  • Hemieridotrypa [Trepostomida]
  • Hemieuryale, E. von Martens 1867 [Hemieuryalidae]
  • Hemifaorina [Schizasteridae]
  • Hemifusulina [Foraminifera]
  • Hemifusulinella [Foraminifera]
  • Hemifusus, Swainson 1840 [Melongenidae]
  • Hemigarantia [Parkinsoniidae]
  • Hemigymnia [Schizasteridae]
  • Hemihaploceras [Oppeliidae]
  • Hemihoplites, Spath 1924 [Hemihoplitidae]
  • Hemiindocrinus, Yakovlev 1927 [Cladida]
  • Hemikaolishania, Zhang 1983 [Corynexochida]
  • Hemikrithe [Podocopida]
  • Hemilampronites, Geinitz 1868 [Beloniformes]
  • Hemilecanites, L. F. Spath 1934 [Hemilecanitidae]
  • Hemilepton, Cossmann 1911 [Erycinidae]
  • Hemilistrona [Conodontophorida]
  • Hemilytoceras, Spath 1927 [Lytoceratidae]
  • Hemimactra, Swainson 1840 [Mactridae]
  • Hemimollocrinus, Yakovlev 1930 [Cladida]
  • Heminajas [Myophoriidae]
  • Heminautilus, Spath 1927 [Cymatoceratidae]
  • Heminematopora [Cryptostomata]
  • Hemingwayella [Podocopida]
  • Hemioon, Bell 1863 [Palaeocorystidae]
  • Hemiparacytheridea [Podocopida]
  • Hemipecten, Adams 1849 [Propeamussiidae]
  • Hemipedina [Pedinidae]
  • Hemiphlactella [Cheilostomata]
  • Hemiphragma [Trepostomida]
  • Hemiphragmoceras, Hyatt in Zittel 1900 [Hemiphragmoceratidae]
  • Hemipiloceras, Shimizu et al. [Cephalopoda]
  • Hemiplasmopora [Anthozoa]
  • Hemiplax [Decapoda]
  • Hemiplethorhynchus [Trigonirhynchiidae]
  • Hemipleurotoma [Turridae]
  • Hemiplicatula [Sacoglossa]
  • Hemipneustes [Holasteridae]
  • Hemiporites, Alloiteau 1952 [Faviidae]
  • Hemipronites [Clitambonitidae]
  • Hemiptychoceras, Spath 1925 [Hamitidae]
  • Hemirhabdorhynchus, Casier 1946 [Istiophoridae]
  • Hemirhamphus, Voigt 1832 [Beloniformes]
  • Hemirhodon, Raymond 1937 [Dolichometopidae]
  • Hemirobulina [Foraminifera]
  • Hemisaurida [Alepisauriformes]
  • Hemiscyllium, Smith 1837 [Hemiscylliidae]
  • Hemiseptella [Calloporidae]
  • Hemisimoceras [Simoceratidae]
  • Hemismittina [Cheilostomata]
  • Hemisphaerammina [Hemisphaeramminidae]
  • Hemisphaerocoryphe, Reed 1896 [Cheiruridae]
  • Hemisquilla [Stomatopoda]
  • Hemisterias [Bivalvia]
  • Hemistreptacron, Yakovlev 1926 [Cladida]
  • Hemistreptocrinus [Crinoidea]
  • Hemistringocephalus [Stringocephalidae]
  • Hemistylus [Cheilostomata]
  • Hemisurcula, Casey 1904 [Turridae]
  • Hemitetragonites, Spath 1927 [Lytoceratidae]
  • Hemithalamocyathus [Ajacicyathida]
  • Hemithiris, d'Orbigny 1847 [Hemithirididae]
  • Hemithurammina [Foraminifera]
  • Hemithylus [Phymosomatidae]
  • Hemithyropsis [Tetrarhynchiidae]
  • Hemithyrsites, Sauvage 1873 [Perciformes]
  • Hemitissotia [Pseudotissotiidae]
  • Hemitoechia [Trigonirhynchiidae]
  • Hemitoma, Swainson 1840 [Fissurellidae]
  • Hemitrypa [Fenestrata]
  • Hemitrypella [Fenestellidae]
  • Hemiulrichostylus [Cryptostomata]
  • Hemlebenia [Foraminifera]
  • Hemsiella [Palaeocopida]
  • Henadoparia, Opik 1967 [Ptychopariida]
  • Henaniodus [Problematica]
  • Hengestites [Placenticeratidae]
  • Hengnania [Pachycormiformes]
  • Hennigopora [Cystoporata]
  • Henningsmoenia [Palaeocopida]
  • Henningsmoenicaris [Arthropoda]
  • Henricellum, O. Wilckens 1937 [Girtyocoeliidae]
  • Henryhowella [Podocopida]
  • Hensonella [Problematica]
  • Hensonia [Foraminifera]
  • Hensonina [Foraminifera]
  • Heosomocelypha [Problematica]
  • Hepatella, Smith 1969 [Aethridae]
  • Hepatinulus, Ristori 1886 [Leucosiidae]
  • Hepatiscus, Bittner 1875 [Aethridae]
  • Hepatus, Latreille 1802 [Hepatidae]
  • Heptabronteus, Webby 1974 [Styginidae]
  • Heptaloculites [Podocopida]
  • Heptanema [Coelacanthidae]
  • Heptranchias, Rafinesque 1810 [Hexanchidae]
  • Heraclites, E. v. Mojsisovics [Heraclitidae]
  • Heracloceras, Teichert 1940 [Nephriticeratidae]
  • Heracrinus, Prokop 1977 [Crinoidea]
  • Heraultipegma, J. Pojeta and B. Runnegar 1976 [Stenothecidae]
  • Herbstia, H. Milne-Edwards 1834 [Epialtidae]
  • Hercantyx, Opik 1963 [Trilobita]
  • Hercoceras, Barrande 1865 [Rutoceratidae]
  • Hercochitina [Rhizopodea]
  • Hercocrinus, Hudson 1907 [Diplobathrida]
  • Hercocyrtoceras, Foerste 1927 [Acleistoceratidae]
  • Hercodon [Cardiida]
  • Hercoglossa, Conrad 1866 [Hercoglossidae]
  • Hercoglossoceras [Nautilida]
  • Hercolepadida, order, Dzik 1986 [Machaeridia]
  • Hercolepas, Withers 1915 [Hercolepadida]
  • Hercophyllum, Jones 1936 [Lykophyllidae]
  • Hercorhynchus [Neogastropoda]
  • Hercostrophia [Douvillinidae]
  • Hercothyris, Cooper 1979 [Terebratulida]
  • Hercynobolbina [Palaeocopida]
  • Hercynocythere [Podocopida]
  • Hercynolepis, Gross 1973 [Orodontiformes]
  • Herentia [Escharinidae]
  • Hergetatrypa [Carinatinidae]
  • Hergottella [Foraminifera]
  • Heritschiella, Moore and Jeffords 1956 [Waagenophyllidae]
  • Heritschioides, Yabe 1950 [Durhaminidae]
  • Herkimeroceras, Foerste 1926 [Jovellaniidae]
  • Hermania, Monterosato 1884 [Cephalaspida]
  • Hermanites, Puri 1955 [Hemicytheridae]
  • Hermatoporella, Khromych 1969 [Trupetostromatidae]
  • Hermatostroma, Nicholson 1886 [Trupetostromatidae]
  • Hermatostromella, Khalfina 1961 [Trupetostromatidae]
  • Hernandezaster [Hemiasteridae]
  • Heroldina [Archaeostraca]
  • Heronallenia [Foraminifera]
  • Herouvalia [Cardiida]
  • Herpetocrinus, Salter 1873 [Crinoidea]
  • Herpetopoma, Pilsbry 1890 [Calliotropidae]
  • Herpetopora, Lang 1914 [Electridae]
  • Herpolitha, Eschscholtz 1825 [Fungiidae]
  • Herreraster [Brissidae]
  • Herrigocyther [Podocopida]
  • Herrmannina, Kegel 1933 [Leperditicopida]
  • Hertha, Hagenow 1840 [Comatulida]
  • Hertleinites, Inlay 1958 [Polyptychitidae]
  • Hertzina [Conodonta]
  • Herznachites [Cardioceratidae]
  • Herzogina, Chavan 1950 [Astartidae]
  • Hescheleria, Peyer 1936 [Thalattosauria]
  • Hesionites [Polychaeta]
  • Heslingtonia [Trigoniida]
  • Hesperaster [Clypeasteroida]
  • Hesperibalanus, Pilsbry 1916 [Archaeobalanidae]
  • Hesperidella [Palaeocopida]
  • Hesperinia [Glyptomenidae]
  • Hesperithyris [Hesperithyrididae]
  • Hesperiturris, J. A. Gardner 1945 [Turridae]
  • Hesperoceras, Miller and Youngquist 1947 [Cephalopoda]
  • Hesperocoelia, Bassler 1927 [Streptosolenidae]
  • Hesperocystis [Rhombifera]
  • Hesperomena [Hesperomenidae]
  • Hesperonomia [Hesperonomiidae]
  • Hesperonomiella [Hesperonomiidae]
  • Hesperopora [Cheilostomata]
  • Hesperorhynchia [Cyclothyrididae]
  • Hesperornithiformes, order, Fürbringer 1888 [Aves]
  • Hesperorthis [Hesperorthidae]
  • Hesperosia [Gibbithyrididae]
  • Hesperotrophia [Tetralobulidae]
  • Hessenhausia [Stringocephalidae]
  • Hesslandella [Palaeocopida]
  • Hesslandites [Podocopida]
  • Hesslandona [Ostracoda]
  • Hesslerella [Isopoda]
  • Hetcochitina [Rhizopodea]
  • Heteractaea, Lockington 1877 [Xanthidae]
  • Heteractinida, class, Hinde 1888 [Porifera]
  • Heteractis [Cheilostomata]
  • Heterantyx [Foraminifera]
  • Heteraster [Toxasteridae]
  • Heterastraea, Tomes 1888 [Oppelismiliidae]
  • Heterastridium, Reuss 1865 [Heterastrididae]
  • Heterdontoides [Conodonta]
  • Heterelasma, Grabau 1922 [Antiphyllidae]
  • Heterillina [Hauerinidae]
  • Heterma [Metacopida]
  • Heteroaspis [Chasmataspidida]
  • Heteroblastus, R. Etheridge and P. H. Carperter 1886 [Spiraculata]
  • Heterobrissus [Asterostomatidae]
  • Heterocaninia, Yabe and Hayasaka 1920 [Aulophyllidae]
  • Heterocaryon, Raymond 1937 [Harpetidae]
  • Heterocella [Vinculariidae]
  • Heteroceras, d'Orbigny 1849 [Heteroceratidae]
  • Heterocerithiopsis [Neotaenioglossa]
  • Heterochiton [Ischnochitonidae]
  • Heterocidaris [Heterocidaridae]
  • Heterocithara [Neogastropoda]
  • Heterocoenia, Milne-Edwards and Haime 1848 [Heterocoeniidae]
  • Heteroconopeum, E. Voigt 1983 [Electridae]
  • Heterocorallia, order, Schindewolf 1941 [Anthozoa]
  • Heterocoskinolina [Foraminifera]
  • Heterocrinus, Hall 1847 [Crinoidea]
  • Heterocrisina [Cyclostomata]
  • Heterocrypta [Decapoda]
  • Heterocyathus, Milne-Edwards and Haime 1848 [Caryophylliidae]
  • Heterocyclopyge, Marek 1961 [Cyclopygidae]
  • Heterocyprideis [Podocopida]
  • Heterocystites [Rhombifera]
  • Heterocythereis [Podocopida]
  • Heterodiadema, Cotteau 1864 [Pseudodiadematidae]
  • Heterodiscus [Hippuritida]
  • Heterodonax, Morch 1853 [Psammobiidae]
  • Heterodontiformes, order, Berg 1940 [Chondrichthyes]
  • Heterodontus, de Blainville 1816 [Heterodontidae]
  • Heterogyrella [Cerithiidae]
  • Heterohaplooecia [Cyclostomata]
  • Heterohelix [Heterohelicidae]
  • Heterolampas [Hemiasteridae]
  • Heterolasma, Ehlers 1919 [Ketophyllidae]
  • Heterolepa, Franzenau 1884 [Heterolepidae]
  • Heterolepidotus, Egerton 1872 [Furidae]
  • Heterolimulus [Xiphosurida]
  • Heteromacoma, Habe 1952 [Tellinidae]
  • Heterometra, Clark 1909 [Comatulida]
  • Heteromorphina [Foraminifera]
  • Heteropecten [Heteropectinidae]
  • Heteropedina [Diadematoida]
  • Heteropetalus [Debeeriidae]
  • Heterophaulactis, Yü 1974 [Cyathophyllidae]
  • Heteropholas [Myoida]
  • Heterophrentis, Billings 1875 [Amplexidae]
  • Heterophyllia, McCoy 1849 [Heterophylliidae]
  • Heterophyllia (Heterophylloides), Schindewolf 1941 [Heterophylliidae]
  • Heteropis [Cardiida]
  • Heteropora [Cyclostomata]
  • Heteroporella [Cyclostomata]
  • Heteropsammia, Milne-Edwards and Haime 1848 [Dendrophylliidae]
  • Heteroptygmatis, Shikama and Yui 1973 [Gastropoda]
  • Heteroraphidites, Schrammen 1901 [Cephaloraphiditidae]
  • Heterorthella [Heterorthidae]
  • Heterorthina, B.B. Bancroft 1928 [Heterorthidae]
  • Heterorthis [Heterorthidae]
  • Heterosalenia, Cotteau [Acrosaleniidae]
  • Heteroschisma, C. Wachsmuth 1883 [Codasteridae]
  • Heterosculpotheca [Problematica]
  • Heterosestrum [Spumellaria]
  • Heterospaeroma [Isopoda]
  • Heterospira [Neotaenioglossa]
  • Heterospongia [Demospongea]
  • Heterospongophyllum, Huang and Kong 1978 [Spongophyllidae]
  • Heterostegina, d'Orbigny 1826 [Nummulitidae]
  • Heterostella [Heteractinida]
  • Heterosteus, Asmuss 1856 [Arthrodiriformes]
  • Heterostinia, Zittel 1878 [Pleromatidae]
  • Heterostomella [Foraminifera]
  • Heterostrea [Pterioida]
  • Heterostrophia, order [Gastropoda]
  • Heterostrophus, Wagner 1859 [Semionotiformes]
  • Heterothrissa [Ctenothrissiformes]
  • Heterotissotia, Peron 1897 [Tissotiidae]
  • Heterotorpedo, Ward 1983 [Myliobatiformes]
  • Heterotrichina [Spirotrichia]
  • Heterotrigonia [Trigoniida]
  • Heterotrypa [Trepostomida]
  • Hexacanthopora [Cheilostomata]
  • Hexachorda [Muricidae]
  • Hexacladus [Spumellaria]
  • Hexaclymenia, Schindewolf 1923 [Cyrtoclymeniidae]
  • Hexacontium, Haeckel 1881 [Hexalonchidae]
  • Hexacosta, Farsan 1981 [Phacopida]
  • Hexacrinites, T. Austin and T. Austin 1843 [Hexacrinitidae]
  • Hexacromyum [Spumellaria]
  • Hexactinella, Carter 1885 [Tretodictyidae]
  • Hexactinellida, class, Schmidt 1870 [Porifera]
  • Hexactinosa, order, Schrammen 1903 [Hexactinellida]
  • Hexadoras [Spumellaria]
  • Hexaglauconia [Neotaenioglossa]
  • Hexagonaria, Gürich 1896 [Disphyllidae]
  • Hexagonites, Hayasaka 1947 [Tainoceratidae]
  • Hexalasma, Soshkina 1928 [Polycoeliidae]
  • Hexaloncharium [Spumellaria]
  • Hexalonche, Haeckel 1881 [Hexalonchidae]
  • Hexameroceras, Hyatt 1884 [Hemiphragmoceratidae]
  • Hexanchiformes, order, de Buen 1926 [Chondrichthyes]
  • Hexanchus, Rafinesque 1810 [Hexanchidae]
  • Hexangulaconularia [Scyphozoa]
  • Hexaphyllia, Shtukenberg 1904 [Heterophylliidae]
  • Hexaplex, Perry 1811 [Muricidae]
  • Hexaporites [Trepostomida]
  • Hexapus, De Haan 1833 [Hexapodidae]
  • Hexasaturnalis, Kozur and Mostler 1983 [Saturnalidae]
  • Hexaspyris, Haeckel 1887 [Triospyrididae]
  • Hexastylarium [Spumellaria]
  • Hexastylostroma [Stromatoporoidea]
  • Hexastylus, Haeckel 1881 [Hexastylidae]
  • Hexatarsostinus, Hawkins 1840 [Sauropterygia]
  • Hexatractiella, Mehl 1996 [Reticulosa]
  • Hexelasma, Lang et al. 1940 [Pachylasmatidae]
  • Hexianella, Zhang 1983 [Proetida]
  • Hexismia, Sokolov 1955 [Halysitidae]
  • Hexites [Arthrostylidae]
  • Hexitheca [Orthothecida]
  • Heymonsicambria [Maxillopoda]
  • Heyuncunoceras [Cephalopoda]
  • Hezhangophyllum, Kong 1978 [Ptenophyllidae]
  • Hezhouphyllum [Anthozoa]
  • Hiantopora [Cheilostomata]
  • Hiatella, Daudin 1801 [Hiatellidae]
  • Hiatobairdia, Kristan-Tollmann 1970 [Bairdiidae]
  • Hiatula [Cardiida]
  • Hibbardella [Prioniodidae]
  • Hibbardia, Kesling 1953 [Beyrichiidae]
  • Hibbertia, Jones and Woodward 1899 [Harpetidae]
  • Hibbertopterus [Eurypterida]
  • Hibernicoceras, Moore and Hodson 1958 [Goniatitidae]
  • Hibernodonta [Rafinesquinidae]
  • Hibolites [Belemnopseidae]
  • Hicetes [Serpulimorpha]
  • Hicksia, Delgado 1904 [Trilobita]
  • Hidaella [Foraminifera]
  • Hidascutellum, Kobayashi and Hamada 1977 [Ptychopariida]
  • Hidina [Foraminifera]
  • Hiemalora, Fedonkin 1982 [Cnidaria]
  • Highgatella, Shaw 1955 [Olenidae]
  • Higumastra, Baumgartner 1980 [Hagiastridae]
  • Hijitrigonia, Kobayashi 1955 [Myophorellidae]
  • Hikelaster [Brissidae]
  • Hilberia, von Teppner 1922 [Pectinidae]
  • Hilda, Hoernes and Auinger 1884 [Buccinidae]
  • Hildaites [Hildoceratidae]
  • Hildaphillipsia, Hahn 1972 [Phillipsiidae]
  • Hildebrandia, Jordan and Evermann 1927 [Congridae]
  • Hildoceras [Hildoceratidae]
  • Hildoceratoides [Hildoceratidae]
  • Hildoglochiceras [Haploceratidae]
  • Hilgardella, L. W. Stephenson 1957 [Mytilidae]
  • Hilgardia, Harris 1946 [Nuculanidae]
  • Hillaepora, Mironova 1960 [Pachyporidae]
  • Hillaxon, Rozkowska 1969 [Laccophyllidae]
  • Hillites [Neogastropoda]
  • Hillius, Bishop 1983 [Cyclodorippidae]
  • Hillmeria [Palaeocopida]
  • Hillophyllum, Webby 1971 [Tryplasmatidae]
  • Hiltermannella [Foraminifera]
  • Hiltermannicythere [Podocopida]
  • Hima, Leach 1852 [Nassariidae]
  • Himalayites [Himalayitidae]
  • Himantoceras, Thieuloy 1965 [Himantoceratidae]
  • Himatella, Zittel 1878 [Sestrostomellidae]
  • Himavatites, C. Diener 1906 [Tibetitidae]
  • Himeraelites [Hippuritida]
  • Himerocrinus, Springer 1921 [Monobathrida]
  • Himerometra, Clark 1907 [Comatulida]
  • Himispiticeras [Cephalopoda]
  • Hinaclema [Trepostomida]
  • Hincksina, Norman 1903 [Flustridae]
  • Hincksipora [Hincksiporidae]
  • Hindeastraea, White 1888 [Siderastreidae]
  • Hindenites [Eunicemorpha]
  • Hindeoceras, Flower 1945 [Rutoceratidae]
  • Hindeodelloides [Conodontophorida]
  • Hindeodina [Conodontophorida]
  • Hindeodus [Conodontophorida]
  • Hindeoprion [Eunicemorpha]
  • Hindermeyeria, Hupe 1953 [Ptychopariida]
  • Hindsiella [Sportellidae]
  • Hinemoana [Cardiida]
  • Hinganastraea [Anthozoa]
  • Hinganella [Chilidiopsidae]
  • Hingganoleptaena [Rafinesquinidae]
  • Hinnites, Defrance 1821 [Pectinidae]
  • Hintzesnonaia [Hexactinellida]
  • Hintzespongia, Rigby and Gutschick 1976 [Hintzespongiidae]
  • Hintziella [Palaeocopida]
  • Hippadenella [Cheilostomata]
  • Hippalimus [Demospongea]
  • Hippaliosina [Cheilostomata]
  • Hipparionix [Chilidiopsidae]
  • Hipparionoceras, Flower 1945 [Polyelasmoceratidae]
  • Hipperechonella [Cheilostomata]
  • Hippiopora [Cheilostomata]
  • Hippocampoides, Wade 1916 [Euomphalidae]
  • Hippocampus, Rafinesque 1810 [Syngnathidae]
  • Hippochaeta [Malleidae]
  • Hippocrepina, Parker in Dawson 1870 [Hyperamminidae]
  • Hippocrepinella [Hippocrepinellidae]
  • Hippocystis [Diploporita]
  • Hippodiplosia, Canu 1916 [Cheilostomata]
  • Hippoexechonella [Cheilostomata]
  • Hippoglossoides, Gottsche 1835 [Pleuronectiformes]
  • Hippolyrula [Romancheinidae]
  • Hippomenella [Cheilostomata]
  • Hippomonavella [Cheilostomata]
  • Hippomya, Salter 1864 [Modiomorphidae]
  • Hipponicharion, Mathew 1886 [Hipponicharionidae]
  • Hipponyx, Defrance 1819 [Hipponicidae]
  • Hippopharangites, Bengtson 1990 [Sachitida]
  • Hippophylactella [Cheilostomata]
  • Hippopleurifera, Canu and Bassler 1927 [Umbonulidae]
  • Hippopodina, Levinsen 1909 [Hippopodinidae]
  • Hippopodinella [Hippoporidridae]
  • Hippopodium, Sowerby 1819 [Hippopodiidae]
  • Hippoporella [Hippoporidridae]
  • Hippoporidra, Canu and Bassler 1927 [Hippoporidridae]
  • Hippoporina [Bitectiporidae]
  • Hippopozoon [Phidoloporidae]
  • Hippopus, Lamarck 1799 [Cardiidae]
  • Hipposera [Cheilostomata]
  • Hipposyngnathus, Danil'chenko 1960 [Gasterosteiformes]
  • Hippothoa [Hippothoidae]
  • Hippozeugosella [Cheilostomata]
  • Hippula [Palaeocopida]
  • Hippuritella, Douvill 1908 [Hippuritidae]
  • Hippurites, Lamarck 1801 [Hippuritidae]
  • Hippuritoida, order, Newell 1965 [Bivalvia]
  • Hircinisca [Septatrypidae]
  • Hiregiroceras [Oncocerida]
  • Hirneacrinus, Frest and Strimple 1977 [Hirneacrinidae]
  • Hiromurex [Neogastropoda]
  • Hiroshimaphyllum, Kato and Minato 1974 [Pseudopavonidae]
  • Hirschmannia, Elofson 1941 [Loxoconchidae]
  • Hirsonella [Neotaenioglossa]
  • Hirsutella [Bittnerulidae]
  • Hirsutocythere [Podocopida]
  • Hirsutodontus [Conodontophorida]
  • Hirsutograptus [Graptoloidea]
  • Hirsutospirella [Foraminifera]
  • Hirudocidaris [Cidaroida]
  • Hirudopsis [Polychaeta]
  • Hisingerella, Henningsmoen 1948 [Acrotretidae]
  • Hispaniaspis, Hammann 1992 [Odontopleuridae]
  • Hispanirhynchia [Frieleiidae]
  • Hispidaria [Echinospiriferidae]
  • Hispidaspis [Lamniformes]
  • Hispidocrinus [Isocrinida]
  • Hispidofusus [Neogastropoda]
  • Hispidopetra [Demospongea]
  • Histiastrum, Ehrenberg 1847 [Larnacillidae]
  • Histina [Palaeocopida]
  • Histiodella [Conodontophorida]
  • Histiomona, Opik 1967 [Odontopleurida]
  • Histocidaris, Mortensen 1903 [Rhabdocidaridae]
  • Histocrinus, Kirk 1940 [Scytalocrinidae]
  • Histopomphus [Foraminifera]
  • Historbitoides [Foraminifera]
  • Histosyrinx [Syringothyrididae]
  • Hithis [Palaeocopida]
  • Hiwia [Neogastropoda]
  • Hlawiceras [Parkinsoniidae]
  • Hodsia [Hexactinellida]
  • Hodsonites, Ramsbottom 1977 [Ramositidae]
  • Hoegisphaera [Rhizopodea]
  • Hoeglundina, Brotzen 1948 [Rotaliidae]
  • Hoekaspis, Kobayashi 1937 [Asaphidae]
  • Hoeloceras [Actinocerida]
  • Hoeninghausia, J. J. Sepkoski 2002 [Koenenitidae]
  • Hoepenites [Cephalopoda]
  • Hoernesarca, Malatesta 1974 [Arcidae]
  • Hoernesiella [Pterioida]
  • Hoeverella [Cheilostomata]
  • Hoferia, Bittner 1894 [Limopsidae]
  • Hoffetella, Hupé 1953 [Dolichometopidae]
  • Hofkerina [Foraminifera]
  • Hofkeruva [Foraminifera]
  • Hogmochilina, Solle 1935 [Leperditicopida]
  • Hokonuia [Pterioida]
  • Holacanthopora, Le Maître 1954 [Micheliniidae]
  • Holasaphus, Matthew 1895 [Ptychopariida]
  • Holaster, Agassiz 1836 [Holasteridae]
  • Holasterella [Reticulosa]
  • Holcacephalus, Resser 1938 [Norwoodiidae]
  • Holcobelus [Belemnitida]
  • Holcocarcinus, Withers 1924 [Carpiliidae]
  • Holcocrinus, Kirk 1945 [Cladida]
  • Holcodiscoides [Kossmaticeratidae]
  • Holcodiscus, Uhlig 1882 [Holcodiscidae]
  • Holcodus, Gibbes 1850 [Mosasauridae]
  • Holcolissoceras [Phylloceratitida]
  • Holcolytoceras [Holcolytoceratidae]
  • Holconautilus, Mojsisovics 1902 [Tainoceratidae]
  • Holcophylloceras, Spath 1927 [Phylloceratidae]
  • Holcopneustes [Hemiasteridae]
  • Holcopocythere [Podocopida]
  • Holcoptychites [Neocomitidae]
  • Holcospirifer [Delthyrididae]
  • Holcospongia, Hinde 1893 [Stellispongiidae]
  • Holcostephanus (Neumayr 1875) [Cephalopoda]
  • Holdenius, Dunkle and Bungart 1942 [Arthrodiriformes]
  • Holectypus [Holectypidae]
  • Holkeria [Foraminifera]
  • Hollandina [Foraminifera]
  • Hollandites, C. Diener 1905 [Ceratitidae]
  • Hollardia, Alberti 1964 [Tropidocoryphidae]
  • Hollardiella, Drot 1967 [Spiriferida]
  • Hollardina [Rafinesquinidae]
  • Hollardosteus [Arthrodiriformes]
  • Hollina [Palaeocopida]
  • Hollinella [Hollinellidae]
  • Holmanella [Foraminifera]
  • Holmdalia, Robison 1988 [Marjumiidae]
  • Holmesella [Chondrichthyes]
  • Holmia, Matthew 1890 [Holmiidae]
  • Holmiceras, Hyatt 1894 [Lituitidae]
  • Holmicrusta [Crustoidea]
  • Holmiella, Fritz 1972 [Holmiidae]
  • Holmipterus [Eurypterida]
  • Holmitheca [Tetrathecidae]
  • Holmograptus [Graptoloidea]
  • Holmophyllum, Wedekind 1927 [Holmophyllidae]
  • Holocentrites, Conrad 1941 [Beryciformes]
  • Holocephalina, Salter 1864 [Conocoryphidae]
  • Holocoelia [Porifera]
  • Holoconularia [Scyphozoa]
  • Holocrinus, Grewingk 1867 [Holocrinidae]
  • Holocryptocapsa, Tan Sin Hok 1927 [Williriedellidae]
  • Holocrytocanium (Dumitrica 1970) [Williriedellidae]
  • Holocystites, Hall 1864 [Aristocystitidae]
  • Holodictyon [Demospongea]
  • Holodipterus [Dipteriformes]
  • Holoeciscus, Foreman 1963 [Holoeciscidae]
  • Holograptus [Graptoloidea]
  • Hologyra, Koken 1892 [Naticopsidae]
  • Holonema, Newberry 1890 [Phyllolepidae]
  • Holophragma, Lindstrm 1896 [Lykophyllidae]
  • Holoporella [Lepraliellidae]
  • Holopterygius [Coelacanthiformes]
  • Holoptychus [Coelacanthiformes]
  • Holopus, Orbigny 1837 [Cyrtocrinida]
  • Holoretiolites [Graptoloidea]
  • Holorhynchus, Kiaer 1902 [Virgianidae]
  • Holostegopora [Cheilostomata]
  • Holothuropsis [Aspidochirotida]
  • Holotrachelus, Holm 1898 [Holotrachelidae]
  • Holtedahlites, Solle 1936 [Leperditicopida]
  • Holteria, Walcott 1924 [Corynexochida]
  • Holynatrypa [Lissatrypidae]
  • Holynetes [Anopliidae]
  • Holynocrinus, Bouška 1948 [Crinoidea]
  • Holyoakia, Palmer and Rowell 1995 [Emuellidae]
  • Holzapfelia [Neogastropoda]
  • Holzapfeloceras, Miller 1932 [Sobolewiidae]
  • Holzbergia [Cephalopoda]
  • Homacanthus, Agassiz 1845 [Acanthodii]
  • Homagnostoides, Kobayashi 1939 [Metagnostidae]
  • Homagnostus, Howell 1935 [Agnostidae]
  • Homaliarhynchia [Norellidae]
  • Homalina, Stoliczka 1870 [Tellinidae]
  • Homaloceras, Whiteaves 1891 [Centroceratidae]
  • Homalocrinus [Sagenocrinida]
  • Homalohedra [Foraminifera]
  • Homalonotus, König 1825 [Homalonotidae]
  • Homalophyllites, Easton 1944 [Zaphrentoididae]
  • Homalophyllum, Simpson 1900 [Streptelasmatidae]
  • Homalopoma, Carpenter 1864 [Turbinidae]
  • Homalopteon, Salter 1867 [Nileidae]
  • Homalopyge, Jaanusson 1956 [Asaphida]
  • Homalostega [Cheilostomata]
  • Homaloteuthis [Belemnitida]
  • Homaphrodites [Phyllodocemorpha]
  • Homarus, Weber 1795 [Nephropidae]
  • Homaspidella [Pteraspidomorphes]
  • Homelys, Von Meyer 1862 [Decapoda]
  • Homeocardiorhynchus [Hebetoechiidae]
  • Homeoceratopsis [Palaeocopida]
  • Homeokiesowia [Palaeocopida]
  • Homerites, E. v. Mojsisovics 1893 [Tropitidae]
  • Homoadelphoceras, Foerste 1926 [Rutoceratidae]
  • Homoceras, J. J. Sepkoski 2002 [Homoceratidae]
  • Homoceratoides, Bisat 1924 [Ramositidae]
  • Homocrinus, Hall 1852 [Crinoidea]
  • Homoctenida, order, B. Boucek 1964 [Tentaculita]
  • Homoctenowakia, Alberti 1984 [Paranowakiidae]
  • Homoctenus, Ljaschenko 1955 [Homoctenidae]
  • Homocystites [Rhombifera]
  • Homodictya, Raymond 1937 [Kingstoniidae]
  • Homoeaster [Palaeostomatidae]
  • Homoeoparonaella, Baumgartner 1980 [Patulibracchiidae]
  • Homoeopetalus [Spatangoida]
  • Homoeoplanulites [Cephalopoda]
  • Homoeospira [Rhynchospirinidae]
  • Homoeospirella [Rhynchospirinidae]
  • Homoiostelea, class [Echinodermata]
  • Homoiranognathus [Conodontophorida]
  • Homolodromia, A. Milne-Edwards 1880 [Homolodromiidae]
  • Homolopsis, Bell 1863 [Homolidae]
  • Homomya, Agassiz 1843 [Pholadomyidae]
  • Homonotichthys, Whitley 1933 [Polymixiiformes]
  • Homophyllia, Bruegemann 1877 [Mussidae]
  • Homorhynchus, Van Beneden 1873 [Actinopteri]
  • Homostelea, class [Echinodermata]
  • Homotelus, Raymond 1920 [Asaphidae]
  • Homotrema [Homotrematidae]
  • Homotreta, Bell 1941 [Acrotretidae]
  • Homotrypa [Trepostomida]
  • Homotrypella [Trepostomida]
  • Honeoyea, Clarke 1904 [Lunulacardiidae]
  • Honggulosma [Anthozoa]
  • Hontorialosia [Strophalosiidae]
  • Hopkinsiana [Neotaenioglossa]
  • Hopkinsina, Howe and Wallace 1932 [Uvigerinidae]
  • Hopkinsinella [Foraminifera]
  • Hoplichthys, Cuvier and Valenciennes 1829 [Scorpaeniformes]
  • Hoplikosmokas [Cephalopoda]
  • Hoplitaechmella [Cheilostomata]
  • Hoplites [Hoplitidae]
  • Hoplitoides, von Koenen 1898 [Coilopoceratidae]
  • Hoplitoplacenticeras, Paulcke 1906 [Placenticeratidae]
  • Hoplobrotula, Gill 1864 [Ophidiidae]
  • Hoplocardioceras [Cardioceratidae]
  • Hoplocheilina [Cheilostomata]
  • Hoplocrinus, Grewingk 1867 [Hybocrinidae]
  • Hoplocrioceras, Spath 1924 [Acrioceratidae]
  • Hoplolichas, Dames 1877 [Lichidae]
  • Hoploparia, McCoy 1849 [Nephropidae]
  • Hoploscaphites, Nowak 1911 [Scaphitidae]
  • Hoplostethus, Cuvier and Valenciennes 1829 [Beryciformes]
  • Hoplostraca, order, Schram 1973 [Malacostraca]
  • Hoplotropites, L. F. Spath 1929 [Tropitidae]
  • Hoplunnis, Kaup 1860 [Anguilliformes]
  • Hopolichoides [Lichida]
  • Hopora [Cheilostomata]
  • Horderleyella, Bancroft 1928 [Harknessellidae]
  • Hordeulima [Neotaenioglossa]
  • Horioceras [Oppeliidae]
  • Horiopleura, Douvill 1889 [Polyconitidae]
  • Horizostoma [Neotaenioglossa]
  • Hormerella [Cheilostomata]
  • Hormocrinus [Sagenocrinida]
  • Hormograptus [Crustoidea]
  • Hormomya, Mörch 1853 [Mytilidae]
  • Hormosina [Hormosinidae]
  • Hormosinella [Hormosinidae]
  • Hornera [Horneridae]
  • Hornibrookella [Podocopida]
  • Hornsundia, Fedorowski 1965 [Bothrophyllidae]
  • Horrificiella [Podocopida]
  • Hosieocrinus, Wright 1952 [Cladida]
  • Hospes, Stubblefield and Bulman 1927 [Ptychopariida]
  • Hospitella [Foraminifera]
  • Hostimex [Trigonirhynchiidae]
  • Hottingerella [Foraminifera]
  • Hottingerina [Meandropsinidae]
  • Hottingerita [Foraminifera]
  • Houdasia [Archaeogastropoda]
  • Houershanophyllum, Yü and Liao 1978 [Cyathophyllidae]
  • Houiblastus [Spiraculata]
  • Houlongdongella, Li 1975 [Bradoriida]
  • Houmengia, Qiu 1983 [Ptychopariida]
  • Hourcquia [Hourcquiinae]
  • Hourqia [Podocopida]
  • Houscolex [Cricocosmiidae]
  • Housia, Walcott 1916 [Pterocephaliidae]
  • Houzeauia [Neogastropoda]
  • Houzeauina [Cheilostomata]
  • Howchinella [Foraminifera]
  • Howchinia [Lasiodiscidae]
  • Howeina [Podocopida]
  • Howellella, Kozlowski 1946 [Delthyrididae]
  • Howellites, Bancroft 1945 [Dalmanellidae]
  • Howellitubus [Serpulimorpha]
  • Howelloidea [Delthyrididae]
  • Howelluella, Hupe 1960 [Trilobita]
  • Howittia [Echinospiriferidae]
  • Hoyacrinus, Delogu and Nicosia 1986 [Cyrtocrinida]
  • Hoyenella, Rettori 1994 [Miliolida]
  • Hoyoceras [Endocerida]
  • Hsuaspis, Chang 1957 [Estaingiidae]
  • Hsuchuangia, Lu and Zhu 1983 [Crepicephalidae]
  • Hsuum, Pessagno 1977 [Hsuidae]
  • Huaibeia, Bi 1983 [Ptychopariida]
  • Huaiheceras [Ellesmerocerida]
  • Huainania, Qiu 1983 [Ptychopariida]
  • Huaiyuanella [Paiutiida]
  • Huamiaocephalus, Qiu 1983 [Diceratocephalidae]
  • Huananaxonia [Anthozoa]
  • Huananochonetes, Wang et al. 1981 [Chonetidae]
  • Huanghuachangoceras [Discosorida]
  • Huanghuaella [Ostracoda]
  • Huangia, Yabe 1950 [Waagenophyllidae]
  • Huanglongophyllum, Yü 1976 [Petalaxidae]
  • Huangophyllum, Tseng 1948 [Polycoeliidae]
  • Huangshandongia [Arthropoda]
  • Huangshandongoconus [Mollusca]
  • Huanoproetus [Proetida]
  • Huantraiconella [Podocopida]
  • Huasha, Cheng 1986 [Ceratoikiscidae]
  • Hubeiella [Verbeekinidae]
  • Hubeinella [Mollusca]
  • Hubeipora [Trepostomida]
  • Hubeiproductus [Productidae]
  • Hubertoceras [Cephalopoda]
  • Hubertschenckia [Cardiida]
  • Hucho, Guenther 1866 [Salmoniformes]
  • Huckea [Palaeocopida]
  • Huddlella [Conodontophorida]
  • Hudlestonella [Neotaenioglossa]
  • Hudlestonia [Hildoceratidae]
  • Hudsonella, Turnsek 1966 [Parastromatoporidae]
  • Hudsonelpidia, McGowan 1995 [Reptilia]
  • Hudsonoceras, Moore 1946 [Girtyoceratidae]
  • Hudsonospongia, Raymond and Okulitch 1940 [Streptosolenidae]
  • Huenella [Huenellidae]
  • Huenellina [Huenellidae]
  • Hughmilleria [Eurypterida]
  • Huhatanka, Felmann and West 1978 [Decapoda]
  • Huiaihecerina [Ellesmerocerida]
  • Huishea [Problematica]
  • Hujiagouella [Helcionellidae]
  • Hukasawaia, Kobayashi 1953 [Asaphida]
  • Hulenites [Kossmaticeratidae]
  • Hulingsina [Podocopida]
  • Humaella, Zhu 1982 [Plectambonitidae]
  • Humboldtochaeta [Problematica]
  • Humeia, Ormiston 1975 [Proetida]
  • Humeoceras, Foerste 1925 [Humeoceratidae]
  • Humilaria, U. S. Grant and Gale 1931 [Veneridae]
  • Humilichthys [Ctenothrissiformes]
  • Humilogriffithides, Inai 1936 [Proetida]
  • Hunanella [Cardiida]
  • Hunanophrentis, Sun 1958 [Disphyllidae]
  • Hunanopora [Trepostomida]
  • Hunanoproductus [Productidae]
  • Hunanopyge, Peng 1984 [Ceratopygidae]
  • Hunanospongia, Qian and Ding 1988 [Protospongiidae]
  • Hundwarella, Reed 1934 [Proasaphiscidae]
  • Hungaia, Walcott 1914 [Hungaiidae]
  • Hungarella [Cytherideidae]
  • Hungariella, Kutassy 1933 [Delphinulopsidae]
  • Hungarispira [Neoretziidae]
  • Hungarites, E. v. Mojsisovics 1879 [Hungaritidae]
  • Hungioides, Kobayashi 1936 [Hungaiidae]
  • Hungkiichthys [Pachycormiformes]
  • Hunkydora, Flemming 1948 [Myochamidae]
  • Hunnanocephalus [Corynexochida]
  • Hunnebergia, Tjernvik 1956 [Asaphidae]
  • Hunnegraptus [Dendroidea]
  • Hunosaurus, Fritsch 1905 [Sauropterygia]
  • Huntonella [Palaeocopida]
  • Huntonia, Vandel 1973 [Dalmanitidae]
  • Hunyuenoceras [Ellesmerocerida]
  • Hupecyathellus [Ajacicyathida]
  • Hupecyathus [Tabulacyathida]
  • Hupehella [Ostracoda]
  • Hupehsuchus, Young and Dong 1972 [Hupehsuchidae]
  • Hupeia, Kobayashi 1944 [Ptychopariida]
  • Hupeolenus, Geyer 1990 [Redlichiida]
  • Hurdia [Hurdiidae]
  • Huronia, Stokes 1824 [Huroniidae]
  • Huroniella, Foerste 1924 [Huroniidae]
  • Huso, Brandt and Ratzeburg 1833 [Acipenseridae]
  • Hussakofia, Cossman 1910 [Arthrodiriformes]
  • Hustedia, Hall and Clarke 1893 [Neoretziidae]
  • Hustedograptus [Graptoloidea]
  • Hustedtiella [Neoretziidae]
  • Hutsonia [Podocopida]
  • Huttonechinus [Holasteroida]
  • Huttoniella [Palaeocopida]
  • Huxleyia, Adams 1860 [Manzanellidae]
  • Hwaania [Neotaenioglossa]
  • Hyala [Neotaenioglossa]
  • Hyalina, Schumacher 1817 [Marginellidae]
  • Hyalinea [Foraminifera]
  • Hyalinonetrion, Patterson and Richardson 1988 [Nodosariidae]
  • Hyalocrinus [Roveacrinida]
  • Hyalocylis, Fol 1875 [Cavoliniidae]
  • Hyaloderma [Demospongea]
  • Hyalonemia [Amphidiscosa]
  • Hyalopecten, Verrill 1897 [Pectinidae]
  • Hyalorisia [Neotaenioglossa]
  • Hyalospongia [Demospongea]
  • Hyalostelia [Heteractinida]
  • Hyalotoechus [Fenestrata]
  • Hyalotragos, Zittel 1878 [Discostromatidae]
  • Hyas, Leach 1814 [Oregoniidae]
  • Hyastenus, White 1847 [Epialtidae]
  • Hyattidina, Schuchert 1913 [Athyridida]
  • Hyboaspis, Raymond 1920 [Illaenidae]
  • Hybocladodus [Ctenacanthiformes]
  • Hybocrinida, superfamily, Jaekel 1918 [Disparata]
  • Hybocrinus, Billings 1857 [Disparata]
  • Hybocystites, Wetherby 1880 [Disparata]
  • Hybolophus [Crassatellidae]
  • Hybonoticeras [Cephalopoda]
  • Hyborhynchella [Leiorhynchidae]
  • Hyderia [Foraminifera]
  • Hydnoceras [Reticulosa]
  • Hydnocerina [Reticulosa]
  • Hydnophora, Fischer de Waldheim 1807 [Faviidae]
  • Hydnophorabacia, d'Achiardi 1875 [Agariciidae]
  • Hydnoseris, Beauvais 1982 [Microsolenidae]
  • Hydractinia [Tubulariae]
  • Hydrallmania, Hincks 1869 [Hydroida]
  • Hydrania [Ophthalmidiidae]
  • Hydreionocrinus, De Koninck 1858 [Cladida]
  • Hydriocrinus, Trautschold 1867 [Cladida]
  • Hydriodictya, Hall and Clarke 1899 [Dictyospongiidae]
  • Hydrocephalus, Barrande 1846 [Paradoxididae]
  • Hydroconozoa, class [Cnidaria]
  • Hydroconus [Hydroconozoa]
  • Hydrocsaspedota [Trachylinida]
  • Hydroida, order, Johnston 1836 [Hydrozoa]
  • Hydroides [Serpulimorpha]
  • Hydropessum, Broom 1909 [Perleidiformes]
  • Hydroporocrinus, Arendt 1970 [Cladida]
  • Hydrotribulus, B. Wade 1916 [Buccinidae]
  • Hydrozoa, class, Owen 1843 [Cnidaria]
  • Hygophum, Bolin 1939 [Myctophidae]
  • Hylodecrinus, Kirk 1941 [Cladida]
  • Hymedesmia [Poecilosclerida]
  • Hymenactura [Spumellaria]
  • Hymeniastrum [Spumellaria]
  • Hymenocaris, Salter 1853 [Hymenostraca]
  • Hymenocephalus, Giglioli 1884 [Macrouridae]
  • Hymenostraca, order, Rolfe 1969 [Malacostraca]
  • Hynniphoria [Aulacothyropsidae]
  • Hyolithelminthes, order, Fischer 1962 [Tommotiida]
  • Hyolithida, order, Mathew 1899 [Hyolitha]
  • Hyolithomorpha, class [Hyolitha]
  • Hyostragulum, Marek and Galle 1976 [Favositida]
  • Hyotissa, Stenzel 1971 [Gryphaeidae]
  • Hypacanthoplites, Spath 1923 [Parahoplitidae]
  • Hypacanthus, Agassiz 1845 [Perciformes]
  • Hypagnostus, Jaeckel 1909 [Spinagnostidae]
  • Hypanis [Cardiida]
  • Hypaproetus, Wu 1977 [Proetida]
  • Hyparpadites, L. F. Spath 1951 [Trachyceratidae]
  • Hypechinus [Echinidae]
  • Hypelasma, Paquier 1897 [Requieniidae]
  • Hyperacanthus [Archaeogastropoda]
  • Hyperammina, Brady 1879 [Hyperamminidae]
  • Hyperamminita [Saccamminidae]
  • Hyperamminoides [Astrorhizidae]
  • Hyperbathoides [Ammodiscidae]
  • Hyperderoceras [Eoderoceratidae]
  • Hypergoniatites, Ruzhencev and Bogoslovskaya 1970 [Goniatitidae]
  • Hyperlioceras [Graphoceratidae]
  • Hypermecaspis, Harrington and Leanza 1957 [Olenidae]
  • Hyperoblastus, Fay 1961 [Phaenoschismatidae]
  • Hyperobolus [Zhanatellidae]
  • Hyperoglyphe, Guenther 1859 [Perciformes]
  • Hyperoparia, Zhang 1983 [Ptychopariida]
  • Hyperoplus, Guenther 1862 [Perciformes]
  • Hyperprosopon, Gibbons 1854 [Perciformes]
  • Hyperstrophina, order, R.M. Linsley and W.M. Kier 1984 [Paragastropoda]
  • Hyphantoceras, Hyatt 1900 [Baculitidae]
  • Hyphasmaphora [Metacopida]
  • Hyphasmopora [Hyphasmoporidae]
  • Hyphoplites, Spath 1922 [Hoplitidae]
  • Hypisculites, L. F. Spath 1951 [Episculitidae]
  • Hypocassis [Neotaenioglossa]
  • Hypocladiscites, E. v. Mojsisovics 1896 [Cladiscitidae]
  • Hypocrinus, Beyrich 1862 [Codiacrinidae]
  • Hypodema [Archaeogastropoda]
  • Hypodicranotus, Whittington 1952 [Remopleurididae]
  • Hypoleiorhynchus [Rhynchonellida]
  • Hypolophites, Leriche 1913 [Dasyatidae]
  • Hypolophodon, Cappetta 1980 [Dasyatidae]
  • Hypomesus, Gill 1862 [Osmeriformes]
  • Hyponeatrypa [Atrypidae]
  • Hypopygurus [Nucleolitidae]
  • Hyporhamphus, Gill 1860 [Beloniformes]
  • Hyporosopora [Cyclostomata]
  • Hyposaurus, Owen 1849 [Dyrosauridae]
  • Hypotetragona [Palaeocopida]
  • Hypothyra [Demospongea]
  • Hypothyridina, Buckman 1906 [Hypothyridinidae]
  • Hypotodus, Jaekel 1895 [Jaekelotodontidae]
  • Hypotrema [Pterioida]
  • Hypotrichina [Spirotrichia]
  • Hypoturrilites, Dubourdieu 1953 [Turrilitidae]
  • Hypoxynoticeras [Oxynoticeratidae]
  • Hypoxytoma [Pterioida]
  • Hypselocrinus, Kirk 1942 [Scytalocrinidae]
  • Hypselonetes [Strophochonetidae]
  • Hypseloterorhynchus [Pugnacidae]
  • Hypsiclavus [Isorophida]
  • Hypsipleura [Neotaenioglossa]
  • Hypsiptycha, Y. Wang 1949 [Rhynchotrematidae]
  • Hypsobatis, Cappetta 1992 [Chondrichthyes]
  • Hypsocormus [Pachycormiformes]
  • Hypsocrinus, Springer and Slocom 1906 [Crinoidea]
  • Hypsomyonia [Hypsomoniidae]
  • Hypsopygaster [Cassidulidae]
  • Hyptocyathus [Ajacicyathida]
  • Hyrcanites, A. A. Shevyrev 1968 [Byrrangoceratidae]
  • Hyrokybe, Lane 1972 [Cheiruridae]
  • Hyrsinobolbina [Palaeocopida]
  • Hyrtanecrinus, Broadhead and Strimple 1980 [Monobathrida]
  • Hysteraster [Spatangoida]
  • Hysteroceras [Discosorida]
  • Hysteroconcha, Dall 1902 [Veneridae]
  • Hysterohowellella [Delthyrididae]
  • Hysterolenus, Moberg 1898 [Ceratopygidae]
  • Hystrichopsydrax [Isorophida]
  • Hystriciola [Phyllodocemorpha]
  • Hystricocythere [Podocopida]
  • Hystricopora [Cheilostomata]
  • Hystricurus, Raymond 1913 [Hystricuridae]
  • Iacra [Cardiida]
  • Iapetognathus [Conodontophorida]
  • Iatella [Podocopida]
  • Ibanocrinus, Ausich 1987 [Monobathrida]
  • Iberihomola [Goniodromitidae]
  • Iberirhynchia [Trigonirhynchiidae]
  • Iberites, A. Hyatt 1900 [Hungaritidae]
  • Iberithyris [Capillithyrididae]
  • Iberocrinus, Sieverts-Doreck 1951 [Monobathrida]
  • Iberolepis, Mader 1986 [Cladoselachida]
  • Ibexaspis, Pribyl and Vanek 1985 [Phacopida]
  • Ibexocrinus, Lane 1970 [Crinoidea]
  • Ibotrigonia [Trigoniidae]
  • Ibukiphyllum, Kato and Minato 1974 [Pseudopavonidae]
  • Icanodus, Miller 1892 [Cochliodontidae]
  • Icanotia, Stoliczka 1870 [Icanotiidae]
  • Icaunhelia, Beauvais 1958 [Aulastraeoporidae]
  • Icelinus, Jordan 1887 [Scorpaeniformes]
  • Ichangia, Chang 1965 [Estaingiidae]
  • Ichnopora [Cheilostomata]
  • Ichnospongia [Demospongea]
  • Ichnusocyathus [Ajacicyathida]
  • Ichthyoceras [Pycnodontiformes]
  • Ichthyococcus, Bonaparte 1841 [Stomiatiformes]
  • Ichthyocrinus [Cyathocrinitidae]
  • Ichthyodectes, E. D. Cope 1870 [Ichthyodectidae]
  • Ichthyokentema [Pachycormiformes]
  • Ichthyolaria [Ichthyolariidae]
  • Ichthyorachis [Acanthocladiidae]
  • Ichthyosauria, order, de Blainville 1835 [Reptilia]
  • Ichthyosaurus, Koenig 1818 [Reptilia]
  • Ichthyotringa [Alepisauriformes]
  • Icriocarcinus, G. A. Bishop 1988 [Goneplacidae]
  • Icriodella [Conodontophorida]
  • Icriodus, Branson and Mehl 1938 [Icriodontidae]
  • Icrioma, De Wever 1979 [Hexaporobrachiidae]
  • Icriospathodus [Gondolellidae]
  • Icthypriapus [Chimaeriformes]
  • Idaeumocrinus, le Menn 1987 [Cladida]
  • Idahoia, Walcott 1924 [Idahoiidae]
  • Idalina [Hauerinidae]
  • Idamea, Whitehouse 1939 [Pagodiidae]
  • Idasola, Iredale 1915 [Mytilidae]
  • Idiocidaris [Hyposaleniidae]
  • Idioclema [Trepostomida]
  • Idiocycloceras [Macrocephalitidae]
  • Idiocythere [Podocopida]
  • Idiodictyon, Laubenfels 1955 [Hexactinosa]
  • Idioglyptus, Northrop 1939 [Strophomenida]
  • Idiognathodus, Gunnell 1931 [Polygnathidae]
  • Idiognathoides [Conodontophorida]
  • Idiohamites, Spath 1925 [Anisoceratidae]
  • Idiomesus, Raymond 1924 [Ptychaspididae]
  • Idiophyllum, Cao 1975 [Arachnophyllidae]
  • Idiorapha [Ptychopariida]
  • Idiorthis [Proschizophoriidae]
  • Idiospira [Septatrypidae]
  • Idiostroma, Winchell 1867 [Idiostromatidae]
  • Idiostrophia [Camerellidae]
  • Idiotrochus, Wells 1936 [Caryophylliidae]
  • Idiotrypa [Trepostomida]
  • Idmonea [Idmoneidae]
  • Idmonella [Cyclostomata]
  • Idmoneoides [Cyclostomata]
  • Idoceras [Cephalopoda]
  • Idolagnostus, Opik 1967 [Agnostidae]
  • Idosocrinus, Wright 1954 [Cladida]
  • Idrissa [Stomiatiformes]
  • Igdabatis, H. Cappetta 1972 [Myliobatidae]
  • Iglesiella, Rasetti 1972 [Redlichiida]
  • Ignara [Pterioida]
  • Ignoceras [Endocerida]
  • Ignoproetus, Snajdr 1977 [Tropidocoryphidae]
  • Ignotifenestella [Fenestrata]
  • Ignotogregatus, Zhang and Jell 1987 [Ptychopariida]
  • Ignotrypa [Fenestrata]
  • Igorina [Foraminifera]
  • Igornella, Heyer 1969 [Palaeonisciformes]
  • Iheringiella, Berg 1898 [Monophorasteridae]
  • Iheringinucula [Nuculida]
  • Iheringithyris, Levy 1961 [Terebratellidae]
  • Ihungia [Neotaenioglossa]
  • Ikamuius [Pristiophoriformes]
  • Ikelarchimedes [Fenestrata]
  • Ikella [Athyrididae]
  • Ilanga [Archaeogastropoda]
  • Ilarionia [Pliolampadidae]
  • Ilariosmilia, Barta-Calmus 1973 [Smilotrochiidae]
  • Ilba [Cirripedia]
  • Ildraites [Phyllodocemorpha]
  • Ilemoraspis [Cephalaspidiformes]
  • Ilerdorbis [Foraminifera]
  • Ilia, Leach 1817 [Leucosiidae]
  • Iliella, Rukavishnikova and Popov 1980 [Spiriferida]
  • Iliochione [Cardiida]
  • Ilisha, Richardson 1845 [Clupeiformes]
  • Iljinella [Neotaenioglossa]
  • Iljinicyathus [Ajacicyathida]
  • Illaenoides, Weller 1907 [Styginidae]
  • Illaenopsis, Salter 1865 [Nileidae]
  • Illaenula, Chlupac 1977 [Phacopida]
  • Illaenurus, Hall 1863 [Illaenuridae]
  • Illaenus, Dalman 1827 [Illaenidae]
  • Illativella [Palaeocopida]
  • Illigata [Foraminifera]
  • Illilepas [Cirripedia]
  • Illiniichthys, Schultze and Bardack 1987 [Palaeonisciformes]
  • Illyanassa [Neogastropoda]
  • Ilmarinia [Clitambonitidae]
  • Ilmenia [Ambocoeliidae]
  • Ilmeniopsis [Ambocoeliidae]
  • Ilmenispina [Ambocoeliidae]
  • Ilmenoindivisia [Ostracoda]
  • Ilmocrinus, Solojeva 1984 [Monobathrida]
  • Ilmospirifer [Ambocoeliidae]
  • Ilowaiskya [Cephalopoda]
  • Ilyinella [Terebratulida]
  • Ilymatogyra, Stenzel 1971 [Gryphaeidae]
  • Imacanthyris [Athyrididae]
  • Imangdites [Palaeocopida]
  • Imbrexia [Imbrexiidae]
  • Imbricaria [Mitridae]
  • Imbricata, order [Eocrinoidea]
  • Imbricatia [Tetralobulidae]
  • Imbricatospira [Atrypinidae]
  • Imdentistella [Meristellidae]
  • Imennovia, Shurygina 1968 [Ptenophyllidae]
  • Imhoffius, Chabanaud 1940 [Pleuronectiformes]
  • Imhotepia [Podocopida]
  • Imitatocrinus, Schmidt 1934 [Cladida]
  • Imitoceras, Schindewolf 1923 [Prionoceratidae]
  • Imlayiceras, Leanza 1967 [Pseudotissotiidae]
  • Immanitas [Hippuritida]
  • Immergentia [Ctenostomata]
  • Immersothorax, Dumitrica 1970 [Williriedellidae]
  • Imocaris [Decapoda]
  • Imperatoria, De Gregorio 1930 [Preperonidellidae]
  • Impiacus [Productellidae]
  • Implexina [Martiniidae]
  • Implicaticystis [Comarocystitida]
  • Implicophyllum, Sytova 1966 [Ptychophyllidae]
  • Imponodictyon [Stromatoporoidea]
  • Inachus, Weber 1795 [Inachidae]
  • Inacyathella [Ajacicyathida]
  • Inaequalina, Terquem 1878 [Miliolida]
  • Inaequalis [Lobothyrididae]
  • Inaigymnites, Y. N. Bando 1967 [Gymnitidae]
  • Inanibigutta, Nazarov 1988 [Inaniguttidae]
  • Inanigutta, Nazarov and Ormiston 1984 [Inaniguttidae]
  • Inanihella, Nazarov and Ormiston 1984 [Inaniguttidae]
  • Inarticulata, class, T. H. Huxley 1869 [Brachiopoda]
  • Inauris [Astrorhizidae]
  • Incacardium [Cardiidae]
  • Incaia, Whittard 1955 [Trinucleidae]
  • Incanopsis [Arcida]
  • Incilaster, Finlay 1926 [Turbinidae]
  • Incisilabium [Archaeogastropoda]
  • Incisopyge, Pillet and Courtessole 1985 [Cyclopygidae]
  • Incisoscutum, Dennis and Miles 1981 [Arthrodira]
  • Incisurella [Metacopida]
  • Inclytoceras [Tarphycerida]
  • Incongruellina [Podocopida]
  • Inconobotopora [Cystoporata]
  • Incorthis [Heterorthidae]
  • Incurvocyathus [Ajacicyathida]
  • Independatrypa [Atrypidae]
  • Indiana, Mathew 1902 [Indianidae]
  • Indigia [Schrenkiellidae]
  • Indigirites [Nathorstitidae]
  • Indigirophyllites, Y. N. Popov 1961 [Ussuritidae]
  • Indiophyllum [Anthozoa]
  • Indivisia [Indivisiidae]
  • Indoceltites, C. Diener 1919 [Thanamitidae]
  • Indocephalites [Macrocephalitidae]
  • Indoceras [Problematica]
  • Indoceras [Sphenodiscinae]
  • Indocerithium [Neotaenioglossa]
  • Indocrinus, Wanner 1916 [Cladida]
  • Indoculana [Nuculida]
  • Indogrammatodon, Cox 1937 [Parallelodontidae]
  • Indojuvavites, C. Diener 1916 [Juvavitidae]
  • Indomya [Pholadomyida]
  • Indonautilus, Mojsisovics 1902 [Liroceratidae]
  • Indonectes [Pterioida]
  • Indonesites, O. Welter 1914 [Tropitidae]
  • Indopecten [Pectinidae]
  • Indophyllia, Gerth 1921 [Mussidae]
  • Indoplacuna, Vredenburg 1924 [Anomiidae]
  • Indorhynchia [Cyclothyrididae]
  • Indoscaphites [Cephalopoda]
  • Indosmilia, Gerth 1933 [Faviidae]
  • Indosphinctes [Cephalopoda]
  • Indospirifer [Echinospiriferidae]
  • Indota, Opik 1968 [Bradoriida]
  • Indotrigonia [Trigoniida]
  • Indovoluta [Neogastropoda]
  • Inessocyathellus [Ajacicyathida]
  • Inessocyathus [Ajacicyathida]
  • Infexiostella [Demospongea]
  • Inflatia [Productidae]
  • Inflaticornus [Orthothecida]
  • Inflatobolivinella [Foraminifera]
  • Inflatomonotis, J.A. Grant-Mackie 1978 [Monotidae]
  • Infraclypeus [Echinoidea]
  • Infracoronia [Neogastropoda]
  • Infundibulipora [Cyclostomata]
  • Infundibulops [Archaeogastropoda]
  • Infurca [Strophomenidae]
  • Ingentilotus, Laubenfels 1955 [Plinthosellidae]
  • Inglefieldia, Poulson 1927 [Alokistocaridae]
  • Inglisella, Finlay 1924 [Cancellariidae]
  • Ingolitotheca [Hyolithida]
  • Ingria [Plectambonitidae]
  • Iniathyris [Athyrididae]
  • Inichthys, Kazantseva-Selezneva 1979 [Palaeonisciformes]
  • Iniella [Podocopida]
  • Iniopterygia, order, Zangerl and Case 1973 [Chondrichthyes]
  • Iniopteryx [Iniopterygidae]
  • Iniospheniscus, Opik 1979 [Diplagnostidae]
  • Iniotoma, Opik 1967 [Ptychopariida]
  • Inioxyle [Iniopterygiformes]
  • Iniproductus [Productellidae]
  • Inisylthere [Palaeocopida]
  • Innaechia [Innaechiidae]
  • Innapora, Leleshus 1974 [Proporidae]
  • Innitagnostus, Opik 1967 [Agnostidae]
  • Innuitella [Leiorhynchidae]
  • Inobolia [Pharetronida]
  • Inocaulis [Hydroida]
  • Inocentrus [Beryciformes]
  • Inoceramus, Sowerby 1814 [Inoceramidae]
  • Inoceramya [Pterioida]
  • Inodia, Moret 1925 [Demospongea]
  • Inoperna, Conrad 1873 [Mytilidae]
  • Inopinatarcula [Inopinatarculidae]
  • Inordinatosphaera [Foraminifera]
  • Inouyella, Resser and Endo 1935 [Solenopleuridae]
  • Inouyia, Walcott 1911 [Inouyiidae]
  • Inouyina, Poletayeva 1936 [Namanoiidae]
  • Inouyops, Resser 1942 [Lorenzellidae]
  • Inoyellaspis, Ivshin 1952 [Ptychopariida]
  • Inquisitor, Hedley 1918 [Turridae]
  • Insculptarenula, Loeblich and Tappan 1985 [Trochamminidae]
  • Insignia [Cryptostomata]
  • Insignicornus [Hyolithida]
  • Insignitisinurostrum [Leiorhynchidae]
  • Insolentia, Finlay 1926 [Turridae]
  • Insolentitheca [Foraminifera]
  • Insolicorypha [Annelida]
  • Insoliphyllum, Ermakova 1957 [Anthozoa]
  • Institella, Cooper 1942 [Aulostegidae]
  • Institifera [Productellidae]
  • Institina [Aulostegidae]
  • Integricardium, Rollier 1912 [Cardiidae]
  • Intejoceras, Balashov 1960 [Intejoceratidae]
  • Intejocerida, order, Balashov 1960 [Cephalopoda]
  • Interalia, Opik 1967 [Ptychopariida]
  • Intermediacrinus, Sutton and Winkler 1940 [Cladida]
  • Interproetus, Snajdr 1977 [Tropidocoryphidae]
  • Intersmilia, Eliasova 1974 [Intersmiliidae]
  • Intexodictyon, Yavorsky 1963 [Atelodictyidae]
  • Intextum, Laubenfels 1955 [Craticulariidae]
  • Intoceras, Kusina 1971 [Intoceratidae]
  • Intodesma [Pterioida]
  • Intornites, Asserto 1966 [Longobarditidae]
  • Intranodites [Cephalopoda]
  • Inversella [Taffiidae]
  • Inversiula [Cheilostomata]
  • Inversoceras, Hedström 1917 [Trimeroceratidae]
  • Invertina [Atrypidae]
  • Invertrypa [Atrypidae]
  • Involuta [Neogastropoda]
  • Involutaria [Ichthyolariidae]
  • Involuticeras [Cephalopoda]
  • Involutina [Involutinidae]
  • Involvina [Foraminifera]
  • Inyocrinus [Crinoidea]
  • Inzeroceras, Ruzhencev 1974 [Schistoceratidae]
  • Iocrinus, Hall 1866 [Crinoidea]
  • Iohomia, Hu 1971 [Ptychopariida]
  • Iolaea, Adams 1867 [Pyramidellidae]
  • Iolgia, Kraevsky 1965 [Redlichiida]
  • Ionicythere [Podocopida]
  • Ionoscopus, Costa 1853 [Amiiformes]
  • Iophon [Poecilosclerida]
  • Ioscion, Jordan 1921 [Perciformes]
  • Iothia [Archaeogastropoda]
  • Iotrigonia [Trigoniida]
  • Iouea [Demospongea]
  • Iowacystis [Soluta]
  • Iowanella [Foraminifera]
  • Iowaphyllum, Stumm 1949 [Endophyllidae]
  • Iowarhynchus [Paranorellidae]
  • Iowaspongia [Reticulosa]
  • Iowatrypa, Copper 1973 [Atrypidae]
  • Iowoceras [Oncocerida]
  • Ipherron [Plectorhynchellidae]
  • Iphiana [Heterostrophia]
  • Iphiculus, Adams and White 1848 [Iphiculidae]
  • Iphigenia [Cardiida]
  • Ipmorella [Cryptostomata]
  • Ipsiphyllum [Anthozoa]
  • Iquitosia [Serpulimorpha]
  • Iranaspis, King 1937 [Corynexochida]
  • Iranella, Hupe 1953 [Dikelocephalidae]
  • Iraniaster [Somaliasteridae]
  • Iranoblastus [Spiraculata]
  • Iranoceras, Walliser 1966 [Sporadoceratidae]
  • Iranognathus [Conodontophorida]
  • Iranoleesia, King 1955 [Proasaphiscidae]
  • Iranophyllum, Douglas 1936 [Waagenophyllidae]
  • Iraqia [Foraminifera]
  • Iraqicythereis [Podocopida]
  • Iravadia, Blanford 1867 [Iravadiidae]
  • Irboskites [Araksalosiidae]
  • Iredalina, Finlay 1926 [Volutidae]
  • Iredalula, Finlay 1926 [Buccinidae]
  • Irenechinus [Temnopleuridae]
  • Irenita [Foraminifera]
  • Irenothyris [Zeilleriidae]
  • Irgislella [Leiorhynchidae]
  • Irgitkhemia, Chernysheva 1977 [Redlichiida]
  • Irhirea [Plectorthidae]
  • Irianoceras [Ellesmerocerida]
  • Iridistrophia [Chilidiopsidae]
  • Irinaecyathus [Ajacicyathida]
  • Irinia, Egorova and Savitsky 1968 [Ptychopariida]
  • Irinites [Oncocerida]
  • Irinoceras, Ruzhencev 1947 [Prionoceratidae]
  • Irregulares, class, Vologdin 1937 [Archaeocyatha]
  • Irregulariaspis [Pteraspidomorphes]
  • Irregularina [Parathuramminidae]
  • Irridinites [Medusae]
  • Iru [Clitambonitidae]
  • Irus, Schmidt 1818 [Veneridae]
  • Irusella, Hertlein and Grant 1972 [Veneridae]
  • Irvingella, Ulrich and Resser 1924 [Elviniidae]
  • Irvingelloides, Kobayashi 1935 [Ptychopariida]
  • Isabelinia, Rabano 1989 [Asaphidae]
  • Isacia, Jordan and Fesler 1894 [Perciformes]
  • Isalaux, Frederickson and Pollack 1952 [Pterygometopidae]
  • Isanda, H. Adams and A. A 1854 [Trochidae]
  • Isarcicella [Conodontophorida]
  • Isaster [Toxasteridae]
  • Isastrocoenia, Gregory 1900 [Conophyllidae]
  • Isbergia, Warburg 1925 [Rorringtoniidae]
  • Ischadia [Demospongea]
  • Ischadium, Jukes-Browne 1905 [Mytilidae]
  • Ischnacanthida, order, Berg 1940 [Acanthodii]
  • Ischnacanthus, Powrie 1864 [Ischnacanthiformes]
  • Ischnochiton, Gray 1847 [Ischnochitonidae]
  • Ischyodus, Egerton 1843 [Callorhynchidae]
  • Ischyrhiza, J. Leidy 1856 [Sclerorhynchidae]
  • Ischyrodonta, Ulrich 1890 [Allodesmatidae]
  • Ischyrotoma, Raymond 1925 [Dimeropygidae]
  • Isculites, E. v. Mojsisovics 1886 [Isculitidae]
  • Isculitoides, L. F. Spath 1930 [Paragoceratidae]
  • Isechinus, Lambert 1903 [Echinidae]
  • Iselica [Pyramidellidae]
  • Iserosaurus, Fritsch 1905 [Sauropterygia]
  • Ishigaconus, Kozur and Mostler 1989 [Follicucullidae]
  • Ishigaum, De Wever and Caridroit 1984 [Cauletellidae]
  • Ishimia [Leptellinidae]
  • Ishmiella [Palaeocopida]
  • Ishnula [Neogastropoda]
  • Ishpella, Petrunina 1990 [Trilobita]
  • Isispongia [Demospongea]
  • Isistius, Gill 1864 [Squalidae]
  • Isiticyathus [Ajacicyathida]
  • Isititheca [Orthothecida]
  • Isjuminelina [Rhynchonellida]
  • Isjuminella, Makridin 1955 [Tetrarhynchiidae]
  • Islandiella [Islandiellidae]
  • Islipia [Archaeogastropoda]
  • Ismailia [Foraminifera]
  • Ismidaster [Holasteridae]
  • Ismidites [Khvalynitidae]
  • Isoarca, Muenster 1842 [Isoarcidae]
  • Isobuntonia [Podocopida]
  • Isobythocypris [Bairdiidae]
  • Isocatillocrinus, Wanner 1937 [Crinoidea]
  • Isochilina, Jones 1858 [Isochilinidae]
  • Isocolus, Angelin 1854 [Isocolidae]
  • Isocrania, Jaekel 1902 [Craniidae]
  • Isocrassina [Cardiida]
  • Isocrinida, order, Sieverts-Doreck 1952 [Crinoidea]
  • Isocrinus, Meyer in Agassiz 1836 [Isocrinidae]
  • Isocyprina, Röder 1882 [Arcticidae]
  • Isocythereis [Podocopida]
  • Isodomella [Neomiodontidae]
  • Isognomon, Lightfoot 1786 [Malleidae]
  • Isogomphodon, Gill 1862 [Carcharhinidae]
  • Isogramma [Isogrammidae]
  • Isograptus, Moberg 1892 [Graptoloidea]
  • Isohabrocythere [Podocopida]
  • Isohomoceras, Ruzhencev and Bogoslovskaya 1971 [Homoceratidae]
  • Isohoplites [Cephalopoda]
  • Isomicraster [Toxasteridae]
  • Isopetalum [Hemiasteridae]
  • Isophragma, Cooper 1956 [Plectambonitidae]
  • Isophyllia, Milne-Edwards and Haime 1851 [Mussidae]
  • Isopneustes [Micrasteridae]
  • Isopoda, order, Latreille 1817 [Malacostraca]
  • Isopodites [Isopoda]
  • Isopoma [Aseptorhynchiidae]
  • Isopristes [Cardiida]
  • Isoprusia, Burton 1966 [Odontopleuridae]
  • Isopsetta, Jordan and Gilbert 1882 [Pleuronectiformes]
  • Isoraphinia, Zittel 1878 [Carterellidae]
  • Isorophida, order [Edrioasteroidea]
  • Isorophus, Foerste 1916 [Agelacrinitidae]
  • Isorophusella, Bassler 1935 [Agelacrinitidae]
  • Isorthis, Kozlowski 1928 [Dalmanellidae]
  • Isospinatrypa [Atrypidae]
  • Isotancredia [Cardiida]
  • Isoteloides, Raymond 1910 [Asaphidae]
  • Isotelus, Dekay 1824 [Asaphidae]
  • Isotomocrinus, Ulrich 1925 [Crinoidea]
  • Isotrypa [Fenestellidae]
  • Isovella [Pentameridae]
  • Isoxys, Walcott 1890 [Arthropoda]
  • Isphairamella [Cystoporata]
  • Ispharaella [Palaeocopida]
  • Isphyllastrea [Scleractinia]
  • Issafenia, Hupe 1960 [Trilobita]
  • Issafeniella, Geyer 1990 [Trilobita]
  • Issedonia, Popov 1980 [Torynelasmatidae]
  • Isselia [Neotaenioglossa]
  • Isselicrinus, Roverto 1914 [Isselicrinidae]
  • Issolites, Yanet 1977 [Favositidae]
  • Isterites [Cephalopoda]
  • Istiophorus, Lacpde 1802 [Istiophoridae]
  • Istorinus [Conodontophorida]
  • Istreites, Simionescu 1913 [Ptychitidae]
  • Istriloculina [Hauerinidae]
  • Isumithyris [Dallinidae]
  • Isurolamna, Cappetta 1992 [Lamniformes]
  • Isyrakopeltis, Rosov and Dubatolova 1985 [Asaphida]
  • Itagnostus, Opik 1979 [Agnostida]
  • Italoptygmatis [Heterostrophia]
  • Itararella [Amphidiscosa]
  • Iteacrinus, Goldring 1923 [Rutkowskicrinidae]
  • Ithycephalus, Resser 1938 [Kingstoniidae]
  • Ithyektyphus, Shaw 1956 [Marjumiidae]
  • Itia [Neogastropoda]
  • Itieria [Heterostrophia]
  • Itomelania [Neotaenioglossa]
  • Itruvia [Heterostrophia]
  • Iuliusina [Foraminifera]
  • Ivanopleura, Snajdr 1984 [Odontopleuridae]
  • Ivanothyris [Delthyrididae]
  • Ivanovaecrinus, Arendt 1983 [Monobathrida]
  • Ivanovella [Foraminifera]
  • Ivanovia, Dobrolyubova 1935 [Petalaxidae]
  • Ivanoviella [Rhynchonellidae]
  • Ivanovites [Hyolithelminthes]
  • Ivara, Dall and Bartsch 1913 [Pyramidellidae]
  • Ivaria [Palaeocopida]
  • Ivdelephyllum, Spasskiy 1971 [Disphyllidae]
  • Ivdelina [Foraminifera]
  • Ivdelinia, Andronov 1961 [Gypidulidae]
  • Iveria, Shergold 1980 [Trilobita]
  • Ivia, Schallreuter 1984 [Leperditicopida]
  • Ividella, Dall and Bartsch 1909 [Pyramidellidae]
  • Ivshinaspis, Petrunina 1973 [Remopleurididae]
  • Ivshinella, Koneva 1979 [Obolellidae]
  • Iwaispirifer [Strophopleuridae]
  • Iwayaspis, Kobayashi 1960 [Trilobita]
  • Ixa, Leach 1816 [Leucosiidae]
  • Ixoides [Decapoda]
  • Iyouella, Geyer and Palmer 1995 [Holmiidae]
  • Izumia [Arcticidae]
  • Izumicardia, Ichikawa 1963 [Carditidae]
  • Izuus, Tokunaga and Saito 1938 [Perciformes]
  • Jaanussonia [Palaeocopida]
  • Jaanussonites [Gonambonitidae]
  • Jaccardiella [Heterostrophia]
  • Jacobites [Kossmaticeratidae]
  • Jacquhermania, Cappetta 1982 [Gymnuridae]
  • Jacquiertia [Phymosomatidae]
  • Jaculella [Hippocrepinidae]
  • Jaculina [Cheilostomata]
  • Jacuticornus [Hyolithida]
  • Jacutolitus [Hyolithida]
  • Jadammina [Foraminifera]
  • Jaekelicrinus, Yakovlev 1949 [Crinoidea]
  • Jaekelocarpus [Mitrata]
  • Jaekelocystis [Rhombifera]
  • Jaekelometra [Comatulida]
  • Jaekelopterus [Eurypterida]
  • Jaekelotodus [Jaekelotodontidae]
  • Jagatiella [Palaeocopida]
  • Jagolucina, Chavan 1937 [Lucinidae]
  • Jagorina, Jaeckel 1821 [Rhenaniformes]
  • Jahnocrinus, Jeakel 1918 [Cladida]
  • Jaisalmeria [Terebratulida]
  • Jakutella [Sentosiidae]
  • Jakutobolbina [Palaeocopida]
  • Jakutocarinus [Ajacicyathida]
  • Jakutostrophia [Amphistrophiidae]
  • Jakutus, Lermontova 1951 [Jakutidae]
  • Jamesella, Walcott 1905 [Protorthidae]
  • Jamischjewskya [Ostracoda]
  • Jamoytius [Anaspida]
  • Janassa [Janassidae]
  • Janenschites [Cephalopoda]
  • Jangudacyathus [Ajacicyathida]
  • Jangudaspis, Ogienko 1956 [Ptychopariidae]
  • Jangziceras [Orthocerida]
  • Janiomya [Shaleriidae]
  • Janiopsis, Rovereto 1899 [Buccinidae]
  • Janischewskina [Foraminifera]
  • Janita [Serpulimorpha]
  • Janius [Cyrtiidae]
  • Janograptus [Graptoloidea]
  • Janopecten [Pectinidae]
  • Janospira [Yochelcionellidae]
  • Janschinella [Myoida]
  • Janthina, Ršding 1798 [Janthinidae]
  • Janupecten, Marwick 1928 [Pectinidae]
  • Janusella [Metacopida]
  • Janxilithus [Ptychopariida]
  • Japanithyris, Thomson 1927 [Dallinidae]
  • Japelion [Neogastropoda]
  • Japhanicyathus [Ajacicyathida]
  • Japonisaturnalis, Kozur and Mostler 1972 [Parasaturnalidae]
  • Japonites, E. Mojsisovics 1893 [Gymnitidae]
  • Japonoconger, Asano 1958 [Anguilliformes]
  • Jaregoceras [Discosorida]
  • Jarovathyris [Athyrididae]
  • Jarvisella [Foraminifera]
  • Jascottella [Hemisphaeramminidae]
  • Jasperia, Thomas and Holloway 1988 [Lichida]
  • Jasus, Parker 1883 [Palinuridae]
  • Jatella [Podocopida]
  • Jauberticeras, Jacob 1907 [Tetragonitidae]
  • Javanella [Podocopida]
  • Javatius [Palaeocopida]
  • Jaworskiella, Leanza 1942 [Laevitrigoniidae]
  • Jaworskiella (Quadratojaworskiella), Reyes and Perez 1980 [Laevitrigoniidae]
  • Jaxea, Nardo 1847 [Laomediidae]
  • Jaycea [Tommotiida]
  • Jeanlouisella [Palaeocopida]
  • Jeannetia [Stomechinidae]
  • Jeanneticeras [Cephalopoda]
  • Jebileticoscinus [Ajacicyathida]
  • Jeffersonia, Poulson 1927 [Bathyuridae]
  • Jeffreysina [Neotaenioglossa]
  • Jefina [Podocopida]
  • Jegorovaia, Lu 1964 [Alsataspididae]
  • Jeletzkiella [Pterioida]
  • Jeletzkytes, Riccardi 1983 [Scaphitidae]
  • Jeletzkyteuthis, Doyle 1990 [Teuthida]
  • Jellinekites, C. Diener 1906 [Parathisbitidae]
  • Jenkinochitina [Rhizopodea]
  • Jenkinsonia, Robison 1971 [Alokistocaridae]
  • Jenneria, Jousseaume 1884 [Cypraeidae]
  • Jenningsina [Metacopida]
  • Jercia () [Chrustenoporidae]
  • Jerea, Lamouroux 1821 [Siphoniidae]
  • Jereica, Zittel 1878 [Jereicidae]
  • Jereminella [Serpulimorpha]
  • Jereomorpha [Demospongea]
  • Jereopsis, Pomel 1872 [Jereicidae]
  • Jerjesia [Hippuritida]
  • Jeronia [Holasteridae]
  • Jesonia, Gray [Carditidae]
  • Jessievillia [Ptychopariida]
  • Jetwoodsia [Neotaenioglossa]
  • Jevinellina [Eoorthidae]
  • Jiagouceras [Ellesmerocerida]
  • Jianfengia [Arthropoda]
  • Jiangdaspirifer [Sinucostidae]
  • Jianghania [Anthaspidellidae]
  • Jiangjunshania, Qiu 1983 [Ptychopariida]
  • Jiangshanodus [Problematica]
  • Jiangshanolites, Lin and Chow [Anthozoa]
  • Jiangsuaspis, Lin 1983 [Ptychopariida]
  • Jiangsucephalus, Qiu 1983 [Ptychopariida]
  • Jiangxilepus [Antiarcha]
  • Jielingia [Foliomenidae]
  • Jiguliconcha [Productellidae]
  • Jiia, Zhou and Zhang 1978 [Remopleurididae]
  • Jilinia [Brachiopoda]
  • Jilinospirifer [Theodossiidae]
  • Jillua [Hydrozoa]
  • Jima [Lychniscosa]
  • Jimboiceras [Desmoceratidae]
  • Jimenites [Cephalopoda]
  • Jingguella [Podocopida]
  • Jinghediscus, Xiang and Zhang 1985 [Agnostida]
  • Jingyangia, Lu and Chang 1974 [Redlichiida]
  • Jinonicella [Yochelcionellidae]
  • Jintingophyllum, Yü 1977 [Geyerophyllidae]
  • Jipaolasma [Anthozoa]
  • Jiucunella [Arthropoda]
  • Jivinella [Eoorthidae]
  • Jixinglingella [Ostracoda]
  • Joachimilites [Hyolithida]
  • Joachimoceras, Barskov 1960 [Geisonoceratidae]
  • Joamgsjamotes [Graptoloidea]
  • Joanellia, Schram 1979 [Aeschronectida]
  • Joannites, E. v. Mojsisovics 1879 [Joannitidae]
  • Jogjacartanus [Neotaenioglossa]
  • Johannaia [Neogastropoda]
  • Johnognathus [Conodontophorida]
  • Johnsonetes [Strophochonetidae]
  • Johnsoniatrypa [Lissatrypidae]
  • Johnstrupia [Neotaenioglossa]
  • Joldagiroceras [Orthocerida]
  • Joleaudichthys, Chabanaud 1937 [Pleuronectiformes]
  • Jolietoceras, Foerste 1925 [Uranoceratidae]
  • Jolonica [Frenulinidae]
  • Jolvia, Sapel'nikov 1960 [Pentameridae]
  • Jonesea [Aegiromenidae]
  • Jonesella [Palaeocopida]
  • Jonesia [Pseudocytheridae]
  • Jonesina [Palaeocopida]
  • Jonesites, Coryell 1930 [Bolliidae]
  • Jonesoceras, Barskov 1960 [Geisonoceratidae]
  • Jonotus, Meyer 1848 [Trilobita]
  • Jordanites [Hollinellidae]
  • Jordanopora [Trepostomida]
  • Josepha [Buccinidae]
  • Josephella, Caullery and Mesnil 1896 [Serpulidae]
  • Josephulus, Warburg 1925 [Phacopida]
  • Jouaniceras, Basse 1939 [Nostoceratidae]
  • Jouannetia, Des Moulins 1828 [Pholadidae]
  • Joufia [Radiolitidae]
  • Jousseaumea, Sacco 1894 [Cypraeidae]
  • Jovellania, Bayle 1879 [Jovellaniidae]
  • Joviatrypa, Copper 1995 [Atrypidae]
  • Jovites, E. v. Mojsisovics 1893 [Tropitidae]
  • Juaboceras [Endocerida]
  • Juanognathus [Conodontophorida]
  • Jubileia, Kobayashi 1938 [Trilobita]
  • Judahella [Cytherissinellidae]
  • Judaiella, Lermontova 1951 [Trilobita]
  • Juddiceras, Spath 1924 [Protancyloceratidae]
  • Judeichthys, Gayet 1985 [Gonorhynchidae]
  • Judeoberyx, Gayet 1980 [Beryciformes]
  • Judicarites, E. v. Mojsisovics 1896 [Danubitidae]
  • Judomia, Lermontova 1943 [Judomiidae]
  • Judomiella, Lazarenko 1962 [Olenellida]
  • Juglandocrinus [Rhombifera]
  • Jugosocythereis [Podocopida]
  • Jujubinus, Monterosato 1884 [Trochidae]
  • Jujuyaspis, Kobayashi 1936 [Olenidae]
  • Julia [Sacoglossa]
  • Juliacorbula, Olsson 1953 [Corbulidae]
  • Jumala [Neogastropoda]
  • Jumudontus [Conodontophorida]
  • Junctusina [Palaeocopida]
  • Jungersenichthys, Blot 1981 [Gasterosteiformes]
  • Junggaroblastus [Fissiculata]
  • Junghuhnia [Neogastropoda]
  • Junjagiana [Modiomorphida]
  • Junocrinus, Prokop 1977 [Crinoidea]
  • Jupiteria, Bellardi 1875 [Nuculanidae]
  • Juralina [Postepithyrididae]
  • Juramegalodus [Hippuritida]
  • Juranomia [Anomiidae]
  • Juraphyllites [Juraphyllitidae]
  • Jurapseudes [Jurapseudidae]
  • Jurassicardium, Cossmann 1906 [Cardiidae]
  • Jurassicorbula [Myoida]
  • Jurassiphorus [Gastropoda]
  • Jurella [Foraminifera]
  • Juresania, Fredericks 1928 [Echinoconchidae]
  • Juresanites, Maximova 1940 [Metalegoceratidae]
  • Juriietella, Jegorova 1981 [Trilobita]
  • Juvavella [Juvavellidae]
  • Juvavellina [Juvavellidae]
  • Juvavionautilus, Mojsisovics 1902 [Syringonautilidae]
  • Juvavites, E. v. Mojsisovics 1879 [Juvavitidae]
  • Juvenix [Podocopida]
  • Jyxilla [Medusae]
  • Kaawatina [Archaeogastropoda]
  • Kabakovitchiella, Weyer 1972 [Laccophyllidae]
  • Kabanoviella [Rhynchonellidae]
  • Kabatarina [Copepoda]
  • Kablikia [Arthropoda]
  • Kabukiia, Zhang 1987 [Ptychopariida]
  • Kabyaipecten [Pterioida]
  • Kabylites, Durand Delga 1954 [Bochianitidae]
  • Kachpurites [Cephalopoda]
  • Kadaroceras [Discosorida]
  • Kadiskoblastus [Spiraculata]
  • Kadraliproductus [Productellidae]
  • Kadyella, Pokrovskaya 1959 [Ellipsocephalidae]
  • Kaesleria [Podocopida]
  • Kaeveria [Ataxophragmiidae]
  • Kahlerina [Verbeekinidae]
  • Kahua [Neotaenioglossa]
  • Kailia, Chang 1974 [Encrinuridae]
  • Kailiceras [Cephalopoda]
  • Kailuanoceras, Obata 1940 [Cephalopoda]
  • Kaimenella, Märss 1988 [Palaeoscolecidae]
  • Kainella, Walcott 1925 [Remopleurididae]
  • Kainops, Ramskold and Werdelin 1991 [Phacopidae]
  • Kaiparapelta [Archaeogastropoda]
  • Kaipingoceras, Shimizu and Obata 1937 [Cephalopoda]
  • Kaitangata [Neotaenioglossa]
  • Kaitoa, Marwick 1931 [Cephalaspida]
  • Kajnaria [Leptellinidae]
  • Kalamopsis, De Folin 1883 [Hormosinidae]
  • Kalayoldia, U.S. Grant and Gale 1931 [Yoldiidae]
  • Kalevipora [Trepostomida]
  • Kalimnasphaera [Spumellaria]
  • Kalitvella [Martiniidae]
  • Kalitvella [Spiriferida]
  • Kaljolasma, Weyer 1972 [Streptelasmatidae]
  • Kallholnoceras [Oncocerida]
  • Kallidecthes, Schram 1969 [Aeschronectida]
  • Kallimorphocrinus, Weller 1930 [Allagecrinidae]
  • Kalloclymenia, Wedekind 1914 [Gonioclymeniidae]
  • Kalloprion [Eunicemorpha]
  • Kallostracon [Pteraspidomorphes]
  • Kalochitina [Rhizopodea]
  • Kalosha [Spiroloculinidae]
  • Kalpidocrinus, Goldring 1954 [Cladida]
  • Kalpinella, Hinde 1884 [Siphoniidae]
  • Kalpinograptus [Graptoloidea]
  • Kaltatocyathus [Ajacicyathida]
  • Kalugia [Palaeocopida]
  • Kaluginella, Kuzmicheva 1980 [Helioporacea]
  • Kalyptovalva [Podocopida]
  • Kamajcythereis [Podocopida]
  • Kameschkoviella, Repina 1959 [Ptychopariida]
  • Kamlacus, Petrunina 1984 [Trilobita]
  • Kammerkaroceras [Psiloceratidae]
  • Kamoica, Hatai 1936 [Frenulinidae]
  • Kamptoclymenia, Schindewolf 1937 [Parawocklumeriidae]
  • Kamptokephalites [Macrocephalitidae]
  • Kamurana [Milioliporidae]
  • Kanabinocrinus, Ausich 1986 [Cladida]
  • Kanakaia [Keramosphaeridae]
  • Kangapaya [Archaeogastropoda]
  • Kangarina [Podocopida]
  • Kangilioptera [Neotaenioglossa]
  • Kangvarella [Foraminifera]
  • Kangxianospira [Neotaenioglossa]
  • Kaninia, Walcott and Resser 1928 [Asaphiscidae]
  • Kaniniella, Kobayashi 1938 [Asaphida]
  • Kaninospirifer [Trigonotretidae]
  • Kankopora [Cheilostomata]
  • Kansacrinus, Pabian and Strimple 1985 [Cladida]
  • Kansanella [Fusulinoidea]
  • Kansasteuthis, Miller and Walker 1968 [Paleololiginidae]
  • Kansius, Hussakof 1929 [Beryciformes]
  • Kansuella [Monticuliferidae]
  • Kantollum, Cheng 1986 [Popofskyellidae]
  • Kaolishania, Sun 1924 [Kaolishaniidae]
  • Kaolishaniella, Sun 1935 [Kaolishaniidae]
  • Kaotaia, Lu 1962 [Ptychopariidae]
  • Kapal, Martin 1930 [Octopoda]
  • Kaparachlamys [Pterioida]
  • Kaplex [Stringocephalidae]
  • Kaplicona [Carinatinidae]
  • Kapua [Neotaenioglossa]
  • Karaburunia [Ophthalmidiidae]
  • Karaclymenia, Bogoslovsky 1983 [Carinoclymeniidae]
  • Karadagella, Babanova 1965 [Muirwoodellidae]
  • Karadagithyris [Muirwoodellidae]
  • Karadzharoceras [Discosorida]
  • Karagandoceras, Librovitch 1940 [Karagandoceratidae]
  • Karagandoides, Ivshin 1962 [Ptychopariida]
  • Karagemia, Dzyubo 1960 [Cyrtophyllidae]
  • Karaisella [Foraminifera]
  • Karakulina [Camerellidae]
  • Karamaiceras [Cephalopoda]
  • Karamaites [Cephalopoda]
  • Karangatites, Y. N. Popov 1968 [Meekoceratidae]
  • Karapadites, Collignon 1954 [Kossmaticeratidae]
  • Karaschiceras [Cephalopoda]
  • Karataspis, Ergaliev 1983 [Eulomidae]
  • Karathele, Koneva 1986 [Botsfordiidae]
  • Karbous [Glassiidae]
  • Kardailites, Ruzhencev and Bogoslovskaya 1971 [Glaphyritidae]
  • Karelosteus [Pteraspidomorphes]
  • Karinadomella [Pachydomellidae]
  • Karinutatia [Palaeocopida]
  • Karlaster [Monophorasteridae]
  • Karlicium [Dalmanellidae]
  • Karlsteinella [Palaeocopida]
  • Karlwaageites, Cooper 1994 [Scaphitidae]
  • Karnotreta [Siphonotretidae]
  • Karoceras, Roussanoff 1909 [Karoceratidae]
  • Karpatiella [Zeilleriidae]
  • Karpinskia [Karpinskiidae]
  • Karreria [Foraminifera]
  • Karreriella, Cushman 1933 [Valvulinidae]
  • Karrerotextularia [Foraminifera]
  • Karsteneis [Podocopida]
  • Karsteniceras, Royo-Gomez 1945 [Leptoceratoididae]
  • Kasachia [Nuculida]
  • Kasachstanodiscus [Foraminifera]
  • Kasakhstanella [Cystoporata]
  • Kasakhstania [Spiriferidae]
  • Kasatchaspis, Ivshin 1962 [Ptychopariida]
  • Kaschkadakia [Mollusca]
  • Kasetia [Linoproductidae]
  • Kashiwara, Sashida and Tonishi 1985 [Spumellaria]
  • Kashmirites, C. Diener 1913 [Kashmiritidae]
  • Kasovobolbina [Palaeocopida]
  • Kassabiana [Foraminifera]
  • Kassina [Nassellaria]
  • Kassinella, Borissiak 1956 [Hesperomenidae]
  • Kassinina [Podocopida]
  • Kassinius, Ivshin 1952 [Corynexochida]
  • Kasyricyathus [Ajacicyathida]
  • Katacanites, Kullmann 1963 [Prolecanitidae]
  • Katageioceras [Discosorida]
  • Katarocrinus [Crinoidea]
  • Katastrophomena, L. R. M. Cocks 1968 [Strophomenidae]
  • Katatona [Palaeocopida]
  • Katchathyris [Aulacothyropsidae]
  • Katelysia, Römer 1857 [Veneridae]
  • Katharina, Gray 1847 [Mopaliidae]
  • Kathemacanthus, Gagnier and Wilson 1996 [Climatiiformes]
  • Kathina [Foraminifera]
  • Kathleenella, Ludvigsen 1982 [Ptychaspididae]
  • Kathpalmeria, Ross 1965 [Archaeobalanidae]
  • Kathrynia, Westrop 1986 [Harpetidae]
  • Katoporodus, Turner and Peel 1986 [Katoporididae]
  • Katosira, Koken 1892 [Settsassiidae]
  • Katranophyllum, Kropacheva 1972 [Aulophyllidae]
  • Katroliceras, Spath [Perisphinctidae]
  • Katrolites [Cephalopoda]
  • Katroma, Pessagno and Poisson 1981 [Syringocapsidae]
  • Katunia [Leiorhynchidae]
  • Katunioides [Mollusca]
  • Katzeria [Radiolitidae]
  • Kaufmannella [Ptychopariida]
  • Kaunhowenia [Neotaenioglossa]
  • Kaurnella [Archaeogastropoda]
  • Kavesia [Productidae]
  • Kawalepsis [Thelodontiformes]
  • Kawasakiceras, Kobayashi 1934 [Sactorthoceratidae]
  • Kaweka [Neogastropoda]
  • Kawina, Barton 1920 [Cheiruridae]
  • Kayatia [Palaeocopida]
  • Kayina [Palaeocopida]
  • Kayoceras, Foerste 1934 [Lowoceratidae]
  • Kayseraspis, Harrington 1938 [Asaphidae]
  • Kayserella [Kayserellidae]
  • Kayseria [Kayseriidae]
  • Kayserops, Delo 1935 [Acastidae]
  • Kayutoceras, Ruzhencev and Ganelin 1971 [Orulganitidae]
  • Kazachiphyllum, Bykova 1966 [Aulophyllidae]
  • Kazachstania, Maksimova 1972 [Dalmanitidae]
  • Kazachstanoblastus, Yu. A. Arendt et al. 1968 [Fissiculata]
  • Kazakhoceras, Ruzhencev 1947 [Berkhoceratidae]
  • Kazakhoclymenia [Clymeniida]
  • Kazakhstania, Librovitch 1940 [Gattendorfiidae]
  • Kazakhstanicyathida, order [Irregulares]
  • Kazakhstanites, A. A. Shevyrev 1968 [Sibiritidae]
  • Kazakhstanotubulus [Problematica]
  • Kazania [Demospongea]
  • Kazarchimedes [Fenestrata]
  • Kazelia, Walcott and Resser 1928 [Asaphida]
  • Kazelina [Ptychopariida]
  • Kazellina, Sivov 1955 [Trilobita]
  • Kechenotiske [Hyperamminoididae]
  • Kechikacyathus [Archaeocyathida]
  • Kedrovothyris [Zeilleriidae]
  • Keeleaspis, Fritz 1972 [Trilobita]
  • Keenaea, Habe 1951 [Cardiidae]
  • Keenocardium [Cardiidae]
  • Keepingia, Nuttal and Cooper 1973 [Nassariidae]
  • Kefiella [Podocopida]
  • Kegeliella, Lutke 1990 [Proetida]
  • Kegelites [Amphissitidae]
  • Keichousaurus, Young 1958 [Pachypleurosauridae]
  • Keijella [Podocopida]
  • Keilostoma, Deshayes 1848 [Diastomatidae]
  • Keimanelasma [Anthozoa]
  • Keithia, Raymond 1924 [Ptychaspididae]
  • Keithiella, Rasseti 1944 [Ptychaspididae]
  • Kelaeno, Munster 1842 [Teuthida]
  • Kelamelia [Productidae]
  • Kelanella [Mitrosagophora]
  • Kelestoma [Cheilostomata]
  • Kellawaysites [Reineckeiidae]
  • Kellericyathus [Ajacicyathida]
  • Kelletia, Fischer 1884 [Buccinidae]
  • Kellettina [Kellettinidae]
  • Kellia, Turton 1822 [Lasaeidae]
  • Kellibrookia [Hoplostraca]
  • Kelliella, Sars 1865 [Kelliellidae]
  • Kellnerites, G. v. Arthaber 1912 [Ceratitidae]
  • Kelteroceras, S. P. Ermakova 1975 [Xenodiscidae]
  • Kelusia [Ambocoeliidae]
  • Kemeroviana [Podocopida]
  • Kendallina, Berg 1953 [Parabolinoididae]
  • Kendrickichthys, Dennis and Miles 1980 [Arthrodiriformes]
  • Kendzhilgithyris [Terebratulida]
  • Kenelasma [Anthozoa]
  • Kenella [Cheilostomata]
  • Kenophyllum, Dybowski 1873 [Streptelasmatidae]
  • Kenseyoceras, Selwood 1960 [Prionoceratidae]
  • Kentlandoceras, Foerste 1932 [Oncoceratidae]
  • Kentronetes [Strophochonetidae]
  • Kentrosia [Lychniscosa]
  • Kentuckia, Rayner 1951 [Palaeonisciformes]
  • Keokukia [Productidae]
  • Kephrenia [Pliolampadidae]
  • Kepingaspis, Chang 1965 [Redlichiida]
  • Kepingophyllum [Kepingophyllidae]
  • Kepinospira [Mollusca]
  • Kepisis, Hu 1971 [Ptychopariida]
  • Kepplerites [Kosmoceratidae]
  • Keraiaceras [Ellesmerocerida]
  • Keramosphaerina [Keramosphaeridae]
  • Keration, Broili 1907 [Tubinidae]
  • Keratothyris [Zeilleriidae]
  • Kerberites [Cephalopoda]
  • Kerbinella, Jegorova 1984 [Trilobita]
  • Kerfornecaris [Archaeostraca]
  • Kerforneidictyum, Lafuste and Plusquellec 1976 [Micheliniidae]
  • Kericserella [Norellidae]
  • Keriocoelia [Tabulospongida]
  • Keriogastrospongia, Wu 1989 [Pelicaspongiidae]
  • Kerionammina [Diffusilinidae]
  • Keriophylloides, Soshkina 1951 [Phillipsastreidae]
  • Kermadysmea [Cardiida]
  • Kerpina [Atrypidae]
  • Kertaster [Spatangoida]
  • Keslingiella [Podocopida]
  • Kestocenbra [Neogastropoda]
  • Ketemecornus [Hyolithida]
  • Ketophylloides, Lavrusevich 1971 [Ketophyllidae]
  • Ketophyllum, Wedekind 1927 [Chonophyllidae]
  • Kettnerammina [Foraminifera]
  • Kettneraspis, Prantl and Pribyl 1949 [Odontopleuridae]
  • Kettnerites [Eunicemorpha]
  • Ketyna, Rozova 1963 [Eulomidae]
  • Kewia, Nisiyama 1935 [Echinarachniidae]
  • Keyserlingia, Pander 1861 [Ceratretidae]
  • Keyserlingites, A. Hyatt 1900 [Sibiritidae]
  • Keyserlingophyllum, Shtukenberg 1895 [Uraliniidae]
  • Khalfinaea [Calcarea]
  • Khalfinella, Elkin 1964 [Proetida]
  • Khangaestrophia [Strophodontidae]
  • Khangailites [Anthozoa]
  • Khasagtina, Ushatinskaya 1987 [Nisusiidae]
  • Khasaktia [Stromatoporoidea]
  • Khatyspytia [Rangeomorpha]
  • Khemisina [Polychaeta]
  • Kheraiceras [Tulitidae]
  • Kheraites [Oppeliidae]
  • Khetatheca [Circothecida]
  • Khetella, Beisel 1977 [Buccinidae]
  • Khinganospirifer [Mucrospiriferidae]
  • Khmeria, Mansuy 1914 [Khmeriidae]
  • Kholbotchonia [Ancistrorhynchidae]
  • Khvalynites, A. A. Shevyrev 1968 [Khvalynitidae]
  • Kiaclymenia, Bogoslovsky 1965 [Biloclymeniidae]
  • Kiaeria, Stormer 1934 [Leperditicopida]
  • Kiaerites, Stasinska 1967 [Theciidae]
  • Kiaeroceras, Strand 1934 [Cyrtogomphoceratidae]
  • Kiaerograptus [Dendroidea]
  • Kiaerolites, Bondarenko 1977 [Proheliolitidae]
  • Kiaeromena, Spjeldnaes 1957 [Rafinesquinidae]
  • Kiaeropterus [Eurypterida]
  • Kiangsiella, Chao 1927 [Schuchertellidae]
  • Kiangsuaspis [Pteraspidomorphes]
  • Kiangyousteus, Liu 1955 [Arthrodira]
  • Kidderia, Dall 1876 [Cyamiidae]
  • Kidjasocyathus [Ajacicyathida]
  • Kiehnensus [Problematica]
  • Kielania, Vanek 1961 [Harpetidae]
  • Kielanopora [Cryptostomata]
  • Kielcensia, Czarnocki 1989 [Wocklumeriidae]
  • Kielcephyllum, Rozkowska 1969 [Kielcephyllidae]
  • Kielcepora [Trepostomida]
  • Kielciella [Palaeocopida]
  • Kierionopsis [Decapoda]
  • Kierocystis [Mitrata]
  • Kiesowia [Palaeocopida]
  • Kijacyathus [Ajacicyathida]
  • Kijanella, Repina 1958 [Ellipsocephalidae]
  • Kijoceras [Oncocerida]
  • Kikaiarca, Noda 1966 [Arcidae]
  • Kikaithyris [Frenulinidae]
  • Kikliocythere [Podocopida]
  • Kilianella, Uhlig 1905 [Neocomitidae]
  • Kilianina [Foraminifera]
  • Kilianocaris [Conchyliocarida]
  • Kimaspis, Mark-Kurik 1973 [Acanthothoraciformes]
  • Kimatothyris [Spiriferida]
  • Kimberella, M. F. Glaessner 1959 [Medusae]
  • Kimberia, Dennis-Bryan and Miles 1983 [Arthrodira]
  • Kimberleyichthys, Dennis-Bryan and Miles 1983 [Arthrodira]
  • Kimbleia [Hippuritida]
  • Kimilites [Anthozoa]
  • Kimoceras, Bogoslovsky 1980 [Auguritidae]
  • Kimognathus [Conodontophorida]
  • Kinaschukoceras [Tarphycerida]
  • Kindbladia, Frederickson 1948 [Dokimocephalidae]
  • Kindbladochiton [Neoloricata]
  • Kinderkaella [Pterioida]
  • Kinderlania, Antsygin 1977 [Proetida]
  • Kindleoceras, Foerste 1924 [Valcouroceratidae]
  • Kinelina [Douvillinidae]
  • Kingaspidoides, Hupe 1960 [Ellipsocephalidae]
  • Kingaspis, Kobayashi 1935 [Ellipsocephalidae]
  • Kingena [Kingenidae]
  • Kingenella [Terebratulida]
  • Kinghiria [Spiriferidae]
  • Kingmaina [Podocopida]
  • Kingstonia, Walcott 1924 [Kingstoniidae]
  • Kinishbia, Winters 1956 [Palaeostylidae]
  • Kinkaidia, Easton 1945 [Polycoeliidae]
  • Kinkelinella [Protocytheridae]
  • Kinkeliniceras [Cephalopoda]
  • Kinnegraptus [Graptoloidea]
  • Kinnekullea, Henningsmoen 1948 [Drepanellidae]
  • Kionelasma, Simpson 1900 [Streptelasmatidae]
  • Kionidella [Cheilostomata]
  • Kionoceras, Hyatt 1884 [Kionoceratidae]
  • Kionophyllum, Chi 1931 [Geyerophyllidae]
  • Kionotrochus, Dennant 1906 [Caryophylliidae]
  • Kiotoceras [Endocerida]
  • Kiowaia, Frederickson 1949 [Dokimocephalidae]
  • Kiparisovia, Bytschkov 1976 [Gymnitidae]
  • Kiparisovites, Astachova 1964 [Byrrangoceratidae]
  • Kipia [Hippuritida]
  • Kirengelia [Ptychopariida]
  • Kirkbyella [Kirkbyellidae]
  • Kirkbyellina [Podocopida]
  • Kirkdomina, Tripp 1962 [Ptychopariida]
  • Kirkidium, Amsden et al. 1967 [Pentameridae]
  • Kirkina [Strophomenidae]
  • Kirkoceras, Ulrich and Foerste 1936 [Proterocameroceratidae]
  • Kirsoceras, Bogoslovsky 1971 [Kirsoceratidae]
  • Kirtonella [Podocopida]
  • Kisasacyathus [Ajacicyathida]
  • Kishinewia [Archaeogastropoda]
  • Kisilia [Martiniidae]
  • Kiskinella, Romanenko and Romanenko 1962 [Agnostida]
  • Kistocare, Lochmann 1948 [Alokistocaridae]
  • Kitabella [Palaeocopida]
  • Kitakamilia [Anthozoa]
  • Kitakamithyris [Elythidae]
  • Kitatites [Discosorida]
  • Kitchinites, Spath 1922 [Desmoceratidae]
  • Kitsonia [Cardiida]
  • Kittlia [Neotaenioglossa]
  • Kittliconcha [Settsassiidae]
  • Kittlitrochus [Archaeogastropoda]
  • Kiwetinokia, Walcott 1920 [Protospongiidae]
  • Kizilia, Degtyarev 1965 [Kiziliidae]
  • Kjaerina [Rafinesquinidae]
  • Kjerulfia, Kiaer 1916 [Holmiidae]
  • Kjerulfina, Bancroft 1929 [Rafinesquinidae]
  • Klaamannipora, Mironova 1974 [Favositidae]
  • Kladisoceras [Discosorida]
  • Kladognathus [Conodontophorida]
  • Klakesia [Polychaeta]
  • Klapperina [Conodontophorida]
  • Klaucena [Rhomboporidae]
  • Kleidionella, Canu and Bassler 1917 [Lepraliellidae]
  • Kleinacteon, Vokes 1939 [Cephalaspida]
  • Kleithriatreta, Roberts and Jell 1990 [Ceratretidae]
  • Klematosphinctes [Cephalopoda]
  • Kleopatrina, McCutcheon and Wilson 1963 [Kleopatrinidae]
  • Klieana [Podocopida]
  • Klimphores [Palaeocopida]
  • Klinghardtites [Hippuritida]
  • Klinglerella [Protocytheridae]
  • Klipsteinia, E. v. Mojsisovics 1892 [Arpaditidae]
  • Kloedenella [Kloedenellidae]
  • Kloedenellitina [Palaeocopida]
  • Kloedenia, Jones and Holl 1886 [Beyrichiidae]
  • Klonkina [Palaeocopida]
  • Klotziella, Raymond 1928 [Corynexochida]
  • Kloucekia, Delo 1935 [Acastidae]
  • Klubonibelia [Foraminifera]
  • Klubovella, N. S. Lebedeva 1956 [Foraminifera]
  • Klukatrypa [Carinatinidae]
  • Klytia [Decapoda]
  • Knebelia, Van Straelen 1922 [Eryonidae]
  • Knechtelia, Lochman 1950 [Trilobita]
  • Knefastia, Dall 1919 [Turridae]
  • Knightia, Jordan 1907 [Clupeidae]
  • Knightoceras, Miller and Owen 1934 [Koninckioceratidae]
  • Knoxiella [Knoxitidae]
  • Knoxina [Palaeocopida]
  • Knoxites [Palaeocopida]
  • Kobayashella, Ivshin 1962 [Asaphida]
  • Kobayashia, Harrington 1938 [Asaphidae]
  • Kobayashiina [Podocopida]
  • Kobayashipeltis, Maksimova 1978 [Corynexochida]
  • Kobayshites [Pterioida]
  • Kobeha, Merriam 1974 [Halliidae]
  • Kobyashiceras [Actinocerida]
  • Kobyastraea, Roniewicz 1970 [Kobyastraeidae]
  • Kobycoenia, Beauvais 1964 [Scleractinia]
  • Kochaspis, Resser 1935 [Ptychopariidae]
  • Kochia [Pterioida]
  • Kochiella, Poulsen 1927 [Ptychopariidae]
  • Kochina, Resser 1935 [Ptychopariidae]
  • Kochoceras, Troedsson 1926 [Actinoceratidae]
  • Kockelella [Conodontophorida]
  • Kodonophyllum, Wedekind 1927 [Kodonophyllidae]
  • Kodymaspis, Prantl and Pribyl 1950 [Nileidae]
  • Kodymirus [Merostomata]
  • Koenenites, Wedekind 1913 [Koenenitidae]
  • Koeveskallina [Balatonospiridae]
  • Kogenium, Kobayashi 1935 [Asaphida]
  • Koigia [Meristellidae]
  • Koilocoenia, Duncan 1884 [Scleractinia]
  • Koilotrochus, Tenison-Woods 1878 [Caryophylliidae]
  • Kokanostrea [Pterioida]
  • Kokomerena [Camerellidae]
  • Kokomopterus [Eurypterida]
  • Kokuria, Kobayashi 1935 [Asaphida]
  • Kolbaspis, Repina 1979 [Redlichiida]
  • Kolbicyathus [Ajacicyathida]
  • Kolbinella, Repina 1960 [Anomocaridae]
  • Kolchidina [Haplophragmoiidae]
  • Koldinia, Walcott and Resser 1928 [Plethopeltidae]
  • Koldiniella, Sivov 1955 [Plethopeltidae]
  • Koldophos [Cyclostomata]
  • Kolednikella [Palaeocopida]
  • Koleostoma [Hexactinosa]
  • Kolesnikovella [Foraminifera]
  • Kolihaia, Prantl 1944 [Cornulitidae]
  • Kolihapeltis, Prantl and Pribyl 1947 [Styginidae]
  • Kolihium [Paterinidae]
  • Kolmodinia [Tribolbinidae]
  • Koloceras, Riccardi et al. 1987 [Oppeliidae]
  • Kologyra, Wells 1937 [Rhipidogyridae]
  • Kolpura, Resser and Endo 1935 [Trilobita]
  • Kolymaspis, Bystrow 1956 [Acanthothoraciformes]
  • Kolymella, Chugaeva 1972 [Phacopida]
  • Kolymia [Kolymiidae]
  • Kolymonectes [Entolioididae]
  • Kolymopora, Preobrazhenskiy 1964 [Parastriatoporidae]
  • Kolymoproetus, Maksimova 1978 [Proetida]
  • Komaroiella [Palaeocopida]
  • Komaspidella, Kobayashi 1938 [Kingstoniidae]
  • Komaspis, Kobayashi 1935 [Ptychopariida]
  • Komia [Axinellida]
  • Komiella, Liashenko 1985 [Komiellidae]
  • Komioceras, Bogoslovsky 1958 [Koenenitidae]
  • Komispirifer [Cyrtospiriferidae]
  • Kompsasteria, Roniewicz 1989 [Cyclophylliidae]
  • Konbostrea [Pterioida]
  • Koneprusia, Prantl and Pribyl 1949 [Odontopleuridae]
  • Koneprusites, Pribyl 1964 [Tropidocoryphidae]
  • Konglungenoceras, Sweet 1959 [Cyrtogomphoceratidae]
  • Konicekion, Snajdr 1975 [Archaeocopida]
  • Koninckella, Munier-Chalmas 1880 [Koninckinidae]
  • Koninckina, Suess 1853 [Koninckinidae]
  • Koninckocarina [Anthozoa]
  • Koninckocidaris [Lepidocentridae]
  • Koninckodonta [Koninckinidae]
  • Koninckophylloides, Gorskiy 1978 [Aulophyllidae]
  • Koninckophyllum, Thomson and Nicholson 1876 [Aulophyllidae]
  • Konstantia [Thecideidae]
  • Konyrium, Nazarov and Popov 1976 [Hexactinellida]
  • Kooptoonocrinus, P.A. Jell and D.J. Holloway 1983 [Cladida]
  • Kootenia (Walcott 1899) [Dorypygidae]
  • Kooteniella, Lermontova 1940 [Dorypygidae]
  • Kooteniellina, Sivov 1955 [Corynexochida]
  • Kopficrinus, Goldring 1954 [Cladida]
  • Kopficystis [Mitrata]
  • Kophinoceras [Oncocerida]
  • Kophinocrinus, Goldring 1954 [Cladida]
  • Koptura, Resser and Endo 1935 [Anomocaridae]
  • Koraipsis, Kobayashi 1934 [Trilobita]
  • Kordecyathus [Ajacicyathida]
  • Koremagraptus [Dendroidea]
  • Korjakirhynchia [Tetrarhynchiidae]
  • Kormagnostella, Romanenko 1967 [Agnostidae]
  • Kormagnostus, Resser 1938 [Agnostidae]
  • Korobkovella [Foraminifera]
  • Korobkovia, Gilbert and van de Poel 1965 [Pectinidae]
  • Korobkoviella [Cardiida]
  • Korobkovitrigonia [Trigoniida]
  • Korobovia, Jell 1990 [Agnostida]
  • Korovinella [Kazakhstanicyathida]
  • Korovinia [Neotaenioglossa]
  • Korshunovicyathus [Capsulocyathida]
  • Korutichthys, Kazantseva-Selezneva 1980 [Palaeonisciformes]
  • Koryschisma [Fissiculata]
  • Korythoceras [Cardioceratidae]
  • Koscoviellina [Palaeocopida]
  • Kosirium [Ambocoeliidae]
  • Koskinobigenerina [Foraminifera]
  • Koskinotextularia [Foraminifera]
  • Kosmermoceras [Stephanoceratidae]
  • Kosmoceras [Kosmoceratidae]
  • Kosmoclymenia, Schindewolf 1949 [Kosmoclymeniidae]
  • Kosoidea, Havlicek and Mergl 1988 [Disciniidae]
  • Kosoraspis, Gross 1959 [Acanthothoraciformes]
  • Kosovoceras [Tarphycerida]
  • Kosovopeltis, Snajdr 1958 [Styginidae]
  • Kossmatella, Jacob 1907 [Gaudryceratidae]
  • Kossmatia, Uhlig [Acanthoceratidae]
  • Kossmaticeras, de Grossouvre 1901 [Kossmaticeratidae]
  • Kossmaticeras (Grossouvrites), Kilian and Reboul 1909 [Kossmaticeratidae]
  • Kotakaia, Beu 1988 [Gastropoda]
  • Kotelnyoceras [Discosorida]
  • Kotisopeltis, Vanek et al. 1991 [Corynexochida]
  • Kotujella, Andreeva 1962 [Matutellidae]
  • Kotujotreta [Acrotretidae]
  • Kotuyicoscinus [Ajacicyathida]
  • Kotylotreta, Koneva 1990 [Acrotretidae]
  • Kotysex [Phoenicitoechiidae]
  • Kounamkites, Chernysheva 1956 [Ptychopariida]
  • Kowalaephyllum [Anthozoa]
  • Kozhimites, Kusina 1971 [Muensteroceratidae]
  • Kozhuchinella [Billingsellidae]
  • Kozlenia [Meristellidae]
  • Kozlowskia, Fredericks 1933 [Productidae]
  • Kozlowskiaspis, Branisa and Vanek 1973 [Calmoniidae]
  • Kozlowskiella [Palaeocopida]
  • Kozlowskiellina, Boucot 1958 [Cyrtinopsidae]
  • Kozlowskinia, Rozkowska 1969 [Kielcephyllidae]
  • Kozlowskiocystia, Stasinska 1969 [Kozlowskiocystiidae]
  • Kozlowskites, Havlicek 1952 [Sowerbyellidae]
  • Kozlowskitubus [Tuboidea]
  • Krachia [Neotaenioglossa]
  • Krafftoceras, Diener 1903 [Cyclolobidae]
  • Kraftia [Palaeocopida]
  • Kraikchania [Mollusca]
  • Krama [Isorophida]
  • Kranaosphinctes [Perisphinctidae]
  • Kransia [Hebetoechiidae]
  • Krasnopeevacyathus [Ajacicyathida]
  • Krattaspis, Opik 1937 [Phacopida]
  • Krausella [Bairdiidae]
  • Krausellina [Podocopida]
  • Kraussina, Davidson 1859 [Kraussinidae]
  • Krebsia [Capulidae]
  • Krejcigrafella [Schuchertellidae]
  • Kreyzstella [Spumellaria]
  • Krikoumbilica [Foraminifera]
  • Krimargyrotheca [Praeargyrothecidae]
  • Krimella, Kuzmicheva 1980 [Gorgonacea]
  • Krinocrinus, Witzke and Strimple 1981 [Monobathrida]
  • Kristinella [Hydroida]
  • Krithe, Brady et al. 1874 [Krithidae]
  • Kritorhynchia [Atrypinidae]
  • Krizistrophia [Chilidiopsidae]
  • Kroemmelbeinella [Podocopida]
  • Kroemmelbeinia [Podocopida]
  • Krolina, Repina 1960 [Ptychopariida]
  • Kronosaurus, Longman 1924 [Pliosauridae]
  • Kronothoa [Cheilostomata]
  • Krotovia [Productellidae]
  • Krumbeckia, Arkell 1951 [Tulitidae]
  • Krumbeckia [Hippuritida]
  • Krumbeckiella, Ichikawa 1958 [Pergamidiidae]
  • Kruseicnema [Archaeocyathida]
  • Krykyloceras [Nautilida]
  • Kryptophanaron, Silvester and Fowler 1927 [Beryciformes]
  • Ktenoura, Lane 1971 [Cheiruridae]
  • Kuamaia, Hou 1987 [Arthropoda]
  • Kuanchuanella [Mollusca]
  • Kuangxiastraea, Yu and Kuang 1983 [Phillipsastreidae]
  • Kuanyangia, Hupe 1953 [Redlichiidae]
  • Kuarnbyella [Cyclostomata]
  • Kuehnia [Radiolitidae]
  • Kueichouphyllum, Yü 1931 [Aulophyllidae]
  • Kueichowella [Monticuliferidae]
  • Kueichowia, Lu 1942 [Redlichiida]
  • Kueichowlepis, Pan and Wang 1975 [Arthrodiriformes]
  • Kueichowpora, Chi 1933 [Syringoporidae]
  • Kufengoceras, Ruzhencev 1956 [Cyclolobidae]
  • Kufralaria [Nuculida]
  • Kugeloceras [Endocerida]
  • Kugleria [Hippuritida]
  • Kuglerina [Foraminifera]
  • Kuhlia, Gill 1861 [Perciformes]
  • Kuhnastraea, Cuif 1976 [Reimaniphylliidae]
  • Kuia, Marwick 1927 [Veneridae]
  • Kuibisia [Medusae]
  • Kujandaspis, Ivshin 1953 [Eulomidae]
  • Kujandina [Trilobita]
  • Kukersella [Cyclostomata]
  • Kuljumbina, Lazerenko 1960 [Ptychopariida]
  • Kullervo, Opik 1932 [Gonambonitidae]
  • Kullingia, Glaessner 1974 [Metazoa]
  • Kullmannophyllum [Anthozoa]
  • Kulmiella, Hahn 1968 [Proetida]
  • Kulparina [Tommotiida]
  • Kulumbella, Nikiforova 1960 [Stricklandiidae]
  • Kumatostephanus [Stephanoceratidae]
  • Kumatrigonia [Trigoniidae]
  • Kummelia, L. W. Stephenson 1937 [Gastrochaenidae]
  • Kummeloceras [Nautilida]
  • Kummerowia [Podocopida]
  • Kumpanophyllum, Fomichev 1953 [Aulophyllidae]
  • Kundatella, Aksarina 1978 [Orthida]
  • Kunklerina [Foraminifera]
  • Kunlunia [Productidae]
  • Kunmingaspis, Lu and Chang 1974 [Ptychopariidae]
  • Kunmingella, Huo 1956 [Archaeocopida]
  • Kunthia, Schlüter 1885 [Disphyllidae]
  • Kunyangella, Huo 1956 [Archaeocopida]
  • Kuonamkicornus [Hyolithida]
  • Kupenga [Trigoniida]
  • Kurakithyris, Hatai 1946 [Terebratulida]
  • Kuraspis, Chernysheva 1959 [Lonchocephalidae]
  • Kuresaaria [Ostracoda]
  • Kurnubia, Henson 1948 [Pfenderinidae]
  • Kurnubiella [Cephalopoda]
  • Kurobechelys, Shikama 1956 [Cheloniidae]
  • Kuroshioturris [Neogastropoda]
  • Kurtinia [Hippuritida]
  • Kurtomarginifera [Productellidae]
  • Kurtziella, Dall 1918 [Turridae]
  • Kusbassophyllum, Dobrolyubova 1966 [Cyathopsidae]
  • Kushanites, Ruzhencev and Bogoslovskaya 1975 [Homoceratidae]
  • Kushlukia, Daniltshenko 1968 [Perciformes]
  • Kutatissites [Cephalopoda]
  • Kutorgina, Billings 1861 [Kutorginidae]
  • Kutorginella [Productidae]
  • Kutorginida, order, Kühn 1949 [Kutorginata]
  • Kutorgoceras, Balashov 1962 [Endoceratidae]
  • Kutsevella [Haplophragmoiidae]
  • Kuzminaella [Myodocopida]
  • Kvesanirhynchia [Basiliolidae]
  • Kwangsia [Athyrididae]
  • Kwangsiphyllum, Grabau and Yoh 1931 [Lithostrotionidae]
  • Kwangsirhynchus [Pugnacidae]
  • Kwangsisaurus, Young 1959 [Eosauropterygia]
  • Kwantoella [Foraminifera]
  • Kyamodes, Jones 1888 [Beyrichiidae]
  • Kyarnbyella [Cyclostomata]
  • Kyarocyathus [Monocyathida]
  • Kygmaeoceras, Flower 1954 [Calyptoptomatida]
  • Kylixocrinus, Eckert 1984 [Monobathrida]
  • Kylonisa [Cheilostomata]
  • Kymagnostus, Hohensee 1989 [Agnostida]
  • Kymataspis, Geyer 1990 [Ellipsocephalidae]
  • Kymatothyris [Reticulariidae]
  • Kyminoceras, Teichert and Glenister 1954 [Protocycloceratidae]
  • Kyndalyna [Archaeogastropoda]
  • Kyphocephalus, Miller 1936 [Dokimocephalidae]
  • Kyphoclonella, Kolb 1910 [Corallistidae]
  • Kyphomopisthia [Palaeocopida]
  • Kyphophyllum, Wedekind 1927 [Kyphophyllidae]
  • Kyphopyxa [Foraminifera]
  • Kyphosus, Lacpde 1802 [Perciformes]
  • Kyreocrinus, Aisich 1986 [Diplobathrida]
  • Kyrtatrypa [Atrypidae]
  • Kyrtogymnodon, Tavani 1955 [Tetraodontiformes]
  • Kystodendron [Rhabdopleurida]
  • Kysylagathophyllum, Kaplan 1971 [Entelophyllidae]
  • Kysylschinopora [Trepostomida]
  • Laballa [Laballidae]
  • Labechia, Milne-Edwards and Haime 1851 [Labechiidae]
  • Labechiella, Yabe and Sugiyama 1930 [Labechiidae]
  • Labiocrinus [Cyrtocrinida]
  • Labioporella, Harmer 1926 [Steginoporellidae]
  • Labiostoma [Foraminifera]
  • Labiostria, Palmer 1955 [Aphelaspididae]
  • Laboceras, A. A. Shevyrev 1961 [Aplococeratidae]
  • Labradoria, Resser 1936 [Edelsteinaspididae]
  • Labriproductus [Productidae]
  • Labrisomus, Swainson 1839 [Perciformes]
  • Labrodon, Gervais 1857 [Labridae]
  • Labrophagus, Casier 1966 [Aulopiformes]
  • Labrosavelum [Palaeocopida]
  • Labrostrea, Vialov 1936 [Gryphaeidae]
  • Labrotaxis [Holasteroida]
  • Labyrinthidoma [Foraminifera]
  • Labyrinthina [Orbitopsellidae]
  • Labyrinthites, Lambe 1906 [Tetraporellidae]
  • Labyrinthoceras [Sphaeroceratidae]
  • Labyrinthochitinia [Allogromiidae]
  • Labyrinthotuba [Problematica]
  • Labyrinthus, Kobluk 1969 [Problematica]
  • Lacazella [Thecideidae]
  • Lacazina [Fabulariidae]
  • Lacazinella [Fabulariidae]
  • Laccinum [Neogastropoda]
  • Laccochilina [Palaeocopida]
  • Laccocrinus, Wanner 1949 [Cladida]
  • Laccophyllum, Simpson 1900 [Laccophyllidae]
  • Laccoprimitia [Palaeocopida]
  • Laceratus [Cribricyathea]
  • Laceripora, Eichwald 1854 [Theciidae]
  • Lacerna [Lacernidae]
  • Lachryma, Sowerby 1832 [Triviidae]
  • Lachrymula [Obolidae]
  • Lacinia, Conrad 1833 [Buccinidae]
  • Laciolina, Iredale 1937 [Tellinidae]
  • Lacorsalina, Bursky 1970 [Remopleurididae]
  • Lacosteina [Foraminifera]
  • Lacriforma [Heterostrophia]
  • Lacrimula [Cheilostomata]
  • Lactarius, Cuvier and Valenciennes 1833 [Perciformes]
  • Laculatina [Foraminifera]
  • Laculina [Neoloricata]
  • Lacuna [Neotaenioglossa]
  • Lacunaerhynchia, Almeras 1966 [Cyclothyrididae]
  • Lacunaria, Conrad 1866 [Naticidae]
  • Lacunarites [Clitambonitidae]
  • Lacunella [Neotaenioglossa]
  • Lacunites [Paterinidae]
  • Lacunoporaspis, Elkin 1966 [Proetidae]
  • Lacunosella, Wisniewska 1932 [Basiliolidae]
  • Lacurnaria [Neotaenioglossa]
  • Ladaecyathus [Ajacicyathida]
  • Ladatheca [Circothecida]
  • Ladinotrochus [Archaeogastropoda]
  • Ladinula, Bandel 1992 [Ladinulidae]
  • Ladjia [Ambocoeliidae]
  • Ladogia [Ladogiidae]
  • Ladogiella [Clitambonitidae]
  • Ladogifornix [Ladogiidae]
  • Ladogilina [Ladogiidae]
  • Ladogilinella [Ladogiidae]
  • Ladogioides [Yunnanellidae]
  • Ladoronia [Foraminifera]
  • Laemonema, Guenther 1862 [Moridae]
  • Laethoprusia, Ramskold 1991 [Odontopleuridae]
  • Laetifautor [Archaeogastropoda]
  • Laevella [Neotaenioglossa]
  • Laevibaculus [Neotaenioglossa]
  • Laevibuccinum [Neogastropoda]
  • Laevicarcinus, Lorenthey 1929 [Panopeidae]
  • Laevicardium, Swainson 1840 [Cardiidae]
  • Laevicirce [Cardiida]
  • Laeviconulus [Archaeogastropoda]
  • Laevicordia, Seguenza 1876 [Verticordiidae]
  • Laevicyphomena [Strophomenidae]
  • Laevidentalina [Nodosariidae]
  • Laevidentalium, Cossmann 1888 [Laevidentaliidae]
  • Laevigaterhynchia [Rhynchonellidae]
  • Laevigatocrinus [Isocrinida]
  • Laevinerinea [Heterostrophia]
  • Laevipatagus [Spatangidae]
  • Laevipeneroplis, Sulc 1936 [Peneroplidae]
  • Laeviprosopon, M. Glaessner 1933 [Prosopidae]
  • Laeviranina [Decapoda]
  • Laeviselica [Heterostrophia]
  • Laevispirifer [Cyrtiidae]
  • Laeviterebrum [Neogastropoda]
  • Laevithyris [Triadithyrididae]
  • Laevitomaria [Pleurotomariidae]
  • Laevitrigonia, Lebkuchner 1932 [Laevitrigoniidae]
  • Laevityphis, Cossmann 1903 [Muricidae]
  • Laffitteina [Foraminifera]
  • Laganoclymenia, Bogoslovsky 1979 [Cymaclymeniidae]
  • Lagarodus [Psammodontidae]
  • Lagarograptus [Graptoloidea]
  • Lagarozoum [Cheilostomata]
  • Lagena, Walker and Boys 1784 [Nodosariidae]
  • Lagenammina, Rhumbler 1911 [Saccamminidae]
  • Lagenicyathus [Cribricyathea]
  • Lageniocrinus, de Koninck 1854 [Cladida]
  • Lagenipora [Cheilostomata]
  • Lagenochitina [Rhizopodea]
  • Lagenoglandulina [Nodosariidae]
  • Lagenosypho [Cyclostomata]
  • Lagnea, Popescu 1983 [Ellipsolagenidae]
  • Lagonibelus [Belemnitida]
  • Lagonoecia [Cyclostomata]
  • Lagowites, Bogoslovsky 1957 [Praeglyphioceratidae]
  • Lagunitus [Neotaenioglossa]
  • Lagynocystis [Mitrata]
  • Lagynopora [Cheilostomata]
  • Lahilleona [Cardiida]
  • Lahillia, Cossmann 1899 [Cardiidae]
  • Laima, Gravitis 1981 [Lingulida]
  • Laiocochlis [Neotaenioglossa]
  • Laioporella [Pennospiriferinidae]
  • Lajanaster [Brissidae]
  • Lajonkairia, Deshayes 1854 [Petricolina]
  • Lakaspis, Kobayashi 1937 [Asaphida]
  • Lamanskya, Moberg and Segerburg 1906 [Elkaniidae]
  • Lamarckella [Foraminifera]
  • Lamarckina, Berthelin 1881 [Ceratobuliminidae]
  • Lamarmorella [Soritidae]
  • Lambdodus [Ctenacanthiformes]
  • Lambelasma, Weyer 1973 [Lambelasmatidae]
  • Lambeoceras, Foerste 1917 [Gonioceratidae]
  • Lambeophyllum, Okulitch 1938 [Lambelasmatidae]
  • Lambericeras [Cardioceratidae]
  • Lambertechinus [Phymosomatidae]
  • Lambertiaster [Palaeostomatidae]
  • Lambertona, Sanchez-Roig 1953 [Schizasteridae]
  • Lambis, Röding 1798 [Strombidae]
  • Lambropsis, Lorenthey 1909 [Xanthidae]
  • Lamcispinifera [Strophomenida]
  • Lamellaeoporella, Smirnova 1968 [Favositidae]
  • Lamellaerhynchia, Burri 1953 [Cyclothyrididae]
  • Lamellaria, Montagu 1815 [Velutinidae]
  • Lamellastraea, Duncan 1867 [Faviidae]
  • Lamellata [Axinellida]
  • Lamelliconcha, Dall 1902 [Veneridae]
  • Lamelliconchidium, Kul'kov 1968 [Subrianidae]
  • Lamelliconus [Involutinidae]
  • Lamellinucula, Schenck 1944 [Nuculidae]
  • Lamelliphorus, Cossmann 1915 [Lamelliphoridae]
  • Lamellofungia, Alloiteau 1957 [Agariciidae]
  • Lamellokoninckina [Koninckinidae]
  • Lamellopora [Stromatoporoidea]
  • Lamellorthoceras, Termier and Termier 1950 [Lamellorthoceratidae]
  • Lamellosathyris [Athyrididae]
  • Lamina [Haplophragmoiidae]
  • Laminatia [Sentosiidae]
  • Laminocyathus, Filkorn 1994 [Turbinoliidae]
  • Laminononion [Foraminifera]
  • Laminopora [Cheilostomata]
  • Laminurus, Repina 1959 [Ptychopariidae]
  • Lamna, Cuvier 1816 [Lamnidae]
  • Lamniformes, order, Berg 1958 [Chondrichthyes]
  • Lamontopterus [Eurypterida]
  • Lamottia, Raymond 1924 [Lamottiidae]
  • Lamottoceras, Flower 1955 [Endoceratidae]
  • Lamottopora [Trepostomida]
  • Lampadaster [Holasteridae]
  • Lampadena, Goode and Bean 1893 [Myctophidae]
  • Lampadosocrinus, Strimple and Koenig 1956 [Streblocrinidae]
  • Lampanella [Neotaenioglossa]
  • Lampanyctodes, Fraser-Brunner 1949 [Myctophiformes]
  • Lampanyctus, Bonaparte 1840 [Myctophidae]
  • Lampasopsis, Jousseaume 1881 [Bursidae]
  • Lampichthys, Fraser-Brunner 1949 [Myctophiformes]
  • Lampridiformes, order, J. E. Olney et al. 1993 [Actinopteri]
  • Lampris, Retzius 1799 [Lampridiformes]
  • Lamprocyclas, Haeckel 1881 [Pterocorythidae]
  • Lamprocyrtis, Kling 1973 [Pterocorythidae]
  • Lamprodoma, Swainson 1840 [Olividae]
  • Lamprodomina [Olividae]
  • Lampropeltis [Plethopeltidae]
  • Lampterium [Pterocorythidae]
  • Lampteroblastus [Edrioasterida]
  • Lampterocrinus, Roemer 1860 [Diplobathrida]
  • Lamptonium, Haeckel 1887 [Theocotylidae]
  • Lamtshinopora [Cystoporata]
  • Lanarkia [Thelodontiformes]
  • Lanarkopora [Fenestrata]
  • Lanarkopterus [Eurypterida]
  • Lancangjiangia [Spiriferellinidae]
  • Lancastria, Kobayashi 1935 [Oryctocephalidae]
  • Lanceolatites [Eunicemorpha]
  • Lanceomyonia [Hebetoechiidae]
  • Lanceopora [Cheilostomata]
  • Landanichthys, Dartevelle and Casier 1949 [Perciformes]
  • Landeroceras, Foerste 1935 [Cyrtogomphoceratidae]
  • Landinia [Crassatellidae]
  • Landyia, Jell 1985 [Phacopida]
  • Lanecrinus, Kamm and Ausi 1993 [Cladida]
  • Laneites, Pribyl and Vanek 1985 [Phacopida]
  • Langdaia [Paraparchitidae]
  • Langeites [Eunicemorpha]
  • Langella, Oliveira 1930 [Lingulidae]
  • Langenosolenia [Foraminifera]
  • Langgonbole, Kobayashi and Hamada 1973 [Proetida]
  • Langgoni, Kobayashi and Hamada 1971 [Phacopida]
  • Langkawia [Rhynchonellata]
  • Langshanthyris [Laqueidae]
  • Langsonella [Pterioida]
  • Langtonia [Podocopida]
  • Langvophorus, Vu-khuc 1977 [Trapezidae]
  • Lanicyathus [Capsulocyathida]
  • Lanipustula [Productellidae]
  • Lankacythere [Podocopida]
  • Lankesterina [Foraminifera]
  • Lannacus, Tjernvik 1956 [Asaphida]
  • Lanopora [Hyphasmoporidae]
  • Lanternarius [Perischoechinoidea]
  • Lanternocrinus [Lanternocrinidae]
  • Lantschichites [Schubertellidae]
  • Laocaetis [Hexactinosa]
  • Laosia, Mansuy 1913 [Rhynchonellida]
  • Lapasnia [Strophomenida]
  • Lapazites [Palaeocopida]
  • Lapeirousella [Radiolitidae]
  • Lapeirousia [Radiolitidae]
  • Lapidaria, Tjernvik 1956 [Asaphidae]
  • Lapidopiscum, Deflandre and Holdsworth 1958 [Ceratoikiscidae]
  • Lapillocystites [Eocrinoidea]
  • Lapparia, Conrad 1855 [Volutidae]
  • Lapradella [Hebetoechiidae]
  • Lapworthicrusta [Crustoidea]
  • Laqueoceras [Psiloceratidae]
  • Laqueoserpula [Serpulimorpha]
  • Laqueus [Laqueidae]
  • Larcidium [Spumellaria]
  • Larcopyle, Dreyer 1889 [Pyloniidae]
  • Larcospira, Haeckel 1887 [Pyloniidae]
  • Lardeuxella [Palaeocopida]
  • Larifugula, Ludvigsen 1982 [Kingstoniidae]
  • Larimus, Cuvier and Valenciennes 1830 [Perciformes]
  • Lariosaurus, Curioni 1847 [Nothosauridae]
  • Larispirifer [Spiriferidae]
  • Larium, Gregorio 1930 [Brachiopoda]
  • Larkinia, Reinhart 1935 [Arcidae]
  • Larma, L. W. Stephenson 1953 [Veneridae]
  • Larnacalpis [Spumellaria]
  • Larnacantha [Spumellaria]
  • Larrazetia [Meandropsinidae]
  • Lasaea, Brown 1827 [Lasaeidae]
  • Lasaeina, Cossmann 1910 [Galeommatidae]
  • Lasaeokellya [Cardiida]
  • Lasaeoneaera [Cardiida]
  • Lasaguaditas, Edgecombe and Chatterton 1998 [Phacopida]
  • Lasanius [Birkeniiformes]
  • Lasanocrinus, Moore and Plummer 1940 [Pirasocrinidae]
  • Lascoa [Semaeostomatida]
  • Lasiocladia [Demospongea]
  • Lasiocrinus, Kirk 1914 [Cladida]
  • Lasiodiscus [Lasiodiscidae]
  • Lasiograptus [Graptoloidea]
  • Lasiothrix [Lyssacinosida]
  • Lasiotrochus [Foraminifera]
  • Lasmosmilia, d'Orbigny 1849 [Montlivaltiidae]
  • Latanarcestes, Schindewolf 1933 [Latanarcestidae]
  • Latebina [Palaeocopida]
  • Latentidiota, Nazarov and Ormiston 1985 [Ruzhencevispongidae]
  • Latentifistula, Nazarov and Ormiston 1983 [Latentifistulidae]
  • Lateralatirostrum [Leiorhynchidae]
  • Latereschara [Cheilostomata]
  • Latericriodus [Conodontophorida]
  • Laterignathus [Conodontophorida]
  • Laterispina [Permianellidae]
  • Laternula, Röding 1798 [Laternulidae]
  • Laterocavea [Horneridae]
  • Laterocea [Cyclostomata]
  • Lateroflustrellaria [Cheilostomata]
  • Laterophores [Palaeocopida]
  • Laterostomella [Foraminifera]
  • Laterotecatia [Cheilostomata]
  • Laterotubigera [Cyclostomata]
  • Lathamella, Liu 1979 [Brachiopoda]
  • Lathyrulus [Neogastropoda]
  • Latiala, Sohl 1960 [Aporrhaidae]
  • Latiaxis, Swainson 1840 [Coralliophilidae]
  • Latibolivina [Foraminifera]
  • Laticarinina [Foraminifera]
  • Laticephalus, Pokrovskaya 1959 [Edelsteinaspididae]
  • Laticlypus [Cassiduloida]
  • Laticrura, Cooper 1956 [Linoporellidae]
  • Latiendothyra [Foraminifera]
  • Latiendothyranopsis [Foraminifera]
  • Latifusus [Neogastropoda]
  • Latikingaspis, Geyer 1990 [Ellipsocephalidae]
  • Latiphyllia, Fromentel 1861 [Montlivaltiidae]
  • Latiplecus [Elythidae]
  • Latiproductus [Monticuliferidae]
  • Latiredlichia, Hupe 1953 [Redlichiida]
  • Latirhynchia, Fu 1982 [Rhynchonellida]
  • Latirolagena, Harris 1897 [Fasciolariidae]
  • Latirus, Monfort 1810 [Fasciolariidae]
  • Latisageceras, Ruzhencev 1956 [Medlicottiidae]
  • Latisipho [Neogastropoda]
  • Latium, Blome 1984 [Pseudodictyomitridae]
  • Latocamurus, Long 1988 [Arthrodira]
  • Latomeandra, Milne-Edwards and Haime 1849 [Latomeandridae]
  • Latona, Schumacher 1817 [Donacidae]
  • Latonotoechia [Machaerariidae]
  • Latoucheia, Hupe 1953 [Trilobita]
  • Latrunculia [Hadromerida]
  • Latvius [Coelacanthiformes]
  • Laubeia, Bittner 1895 [Bivalvia]
  • Laubeocrinus [Crinoidea]
  • Laubriereia [Cardiida]
  • Laudonia, Harrington 1956 [Olenellidae]
  • Laudonocrinus, Moore and Plummer 1940 [Cladida]
  • Laugeites [Cephalopoda]
  • Laumontoceras, Foerste 1926 [Jovellaniidae]
  • Laureloceras, Flower 1949 [Barrandoceratidae]
  • Laurelocrinus, Springer 1926 [Monobathrida]
  • Laurentaspis, Pageau 1969 [Arthrodira]
  • Laurentoscandodus [Conodontophorida]
  • Laurieopterus (Kjellesvig-Waering 1966) [Stylonuridae]
  • Lautoconus [Neogastropoda]
  • Lauzonella, Rasetti 1944 [Ptychopariida]
  • Lavenachiton [Neoloricata]
  • Lavsanodiscus [Agnostida]
  • Laxispira, Gabb 1877 [Turritellidae]
  • Laxoendothyra [Foraminifera]
  • Laxograptus [Graptoloidea]
  • Laxoseptabrunsiina [Foraminifera]
  • Laytonia, David 1943 [Anguilliformes]
  • Lazariella [Cardiida]
  • Lazella [Zeilleriidae]
  • Lazithyris [Trigonithyrididae]
  • Lazutkinia [Lazutkiniidae]
  • Leaella [Neotaenioglossa]
  • Leanchoilia, Walcott 1912 [Arachnomorpha]
  • Leangella, Opik 1933 [Leptestiidae]
  • Lebedictya [Reticulosa]
  • Lebediorthis [Orthida]
  • Lebesconteia [Archaeostraca]
  • Lebetoceras, Teichert and Glenister 1954 [Ellesmeroceratidae]
  • Lebetocrinus [Cladida]
  • Lebetodiscus, Bather 1908 [Hemicystitidae]
  • Lebonichthys, Forey 1973 [Albulidae]
  • Lecanella, Zittel 1878 [Lecanellidae]
  • Lecanites, E. v. Mojsisovics 1882 [Lecanitidae]
  • Lecanoaspis, Ivshin 1962 [Ptychopariida]
  • Lecanocrinus [Sagenocrinida]
  • Lecanopleura, Raymond 1937 [Ptychopariida]
  • Lecanopyge, Raymond 1937 [Illaenuridae]
  • Lecfedites, Oliver 1975 [Favositidae]
  • Lechites, Nowak 1908 [Baculitidae]
  • Lechritrochoceras, Foerste 1926 [Lechritrochoceratidae]
  • Leckhamptonia [Cardiida]
  • Lecobasicrinus, Strimple and Watkins 1969 [Aesiocrinidae]
  • Lecocrinus [Sagenocrinida]
  • Lecointriceras [Collignoniceratidae]
  • Lecomptella [Stromatoporoidea]
  • Lecompteus [Mytilidae]
  • Leconteiceras, J. P. Smith 1914 [Clionititidae]
  • Leconteites [Hoplitidae]
  • Lecythiocrinus, White 1880 [Codiacrinidae]
  • Lecythocaris, Von Meyer 1858 [Lecythocaridae]
  • Lecythocrinus, Mueller 1858 [Cladida]
  • Leda (Neilonella), Dall 1881 [Tindariidae]
  • Ledahia [Healdiidae]
  • Ledella, Verrill and Bush 1897 [Nuculanidae]
  • Ledidocidaris [Echinocystitoida]
  • Ledina, Dall 1898 [Nuculanidae]
  • Lednevia, Danil'chenko 1960 [Perciformes]
  • Ledopsis, Beushausen 1884 [Praenuculidae]
  • Leedsichthys, Woodward 1889 [Amiiformes]
  • Leeites, Bogoslovskaya 1990 [Hyattoceratidae]
  • Leella [Staffellidae]
  • Leeporina [Trepostomida]
  • Lefortia [Faujasiidae]
  • Lefroyella, Thomson 1877 [Euretidae]
  • Legrandella [Xiphosurida]
  • Legumen, Conrad 1858 [Veneridae]
  • Lehmaniceras [Cephalopoda]
  • Lehua, Barton 1920 [Cheiruridae]
  • Leiagnostus, Jaekel 1909 [Agnostidae]
  • Leibaella [Cribricyathea]
  • Leichneyella, Opik 1967 [Anomocaridae]
  • Leimitzia, Sdzuy 1955 [Hungaiidae]
  • Leinzia [Pholadomyida]
  • Leiocarenus, Schrammen 1937 [Corallistidae]
  • Leioceras [Graphoceratidae]
  • Leiochaetetes [Tabulospongida]
  • Leiochonetes [Rugosochonetidae]
  • Leiochonia, Schrammen 1901 [Azoricidae]
  • Leiocoryphe, Clark 1924 [Plethopeltidae]
  • Leiocyamus [Palaeocopida]
  • Leiocyphus [Temnopleuridae]
  • Leiodermatium [Demospongea]
  • Leiodon, Owen 1841 [Pythonomorpha]
  • Leiodorella, Zittel 1878 [Scleritodermatidae]
  • Leiodus [Leiodontidae]
  • Leiodysodonta [Nuculida]
  • Leioechinus [Phymosomatoida]
  • Leiognathus, Lacpde 1802 [Perciformes]
  • Leiolambrus, A. Milne-Edwards 1879 [Parthenopidae]
  • Leiolichas, Schmidt 1885 [Lichida]
  • Leionucula, Quenstedt 1930 [Nuculidae]
  • Leiopathes [Antipatharia]
  • Leiopecten, Khalfin 1940 [Leiopectinidae]
  • Leiopedina [Pedinidae]
  • Leiophyllites, C. Diener 1915 [Palaeophyllitidae]
  • Leiophyllum, Schrammen 1924 [Theonellidae]
  • Leioprimitia [Palaeocopida]
  • Leioproductus [Productidae]
  • Leiopteria, Hall 1883 [Pterineidae]
  • Leiopyrga, Adams 1863 [Trochidae]
  • Leiorhinus [Neotaenioglossa]
  • Leiorhynchoides [Rhynchonellata]
  • Leiorhynchus, Hall 1860 [Leiorhynchidae]
  • Leioscutellum, Wu 1977 [Ptychopariida]
  • Leiosella [Cheilostomata]
  • Leioseptathyris [Stringocephalidae]
  • Leiosoecia [Cyclostomata]
  • Leiosolenus [Mytilida]
  • Leiospongia, d'Orbigny 1849 [Pharetrospongiidae]
  • Leiostegina, Kobayashi 1937 [Homalonotidae]
  • Leiostegium, Raymond 1913 [Leiostegiidae]
  • Leiostomaster [Palaeostomatidae]
  • Leiostraca [Neotaenioglossa]
  • Leiostracosia, Schrammen 1902 [Ventriculitidae]
  • Leiostrototropis, Kobayashi 1937 [Phacopida]
  • Leiothycridina [Athyrididae]
  • Lejopyge, Hawle and Corda 1847 [Ptychagnostidae]
  • Lekocrinus, Kamm and Ausi 1994 [Cladida]
  • Lekythionia [Cyclostomata]
  • Lekythoglena [Cheilostomata]
  • Lekythopora [Cheilostomata]
  • Lembitites [Palaeocopida]
  • Lembitsarvella [Palaeocopida]
  • Lembulus, Leach 1826 [Nuculanidae]
  • Lemdadella, Sdzuy 1978 [Redlichiidae]
  • Lemennocrinus, Pidel 1984 [Diplobathrida]
  • Lemintina, Risso 1826 [Vermetidae]
  • Lemniscaterina, order, Gallitelli 1979 [Hydrozoa]
  • Lemniscolittorina, N. F. Sohl 1960 [Mathildidae]
  • Lemuroceras [Hoplitidae]
  • Lenacare, Egorova 1976 [Alokistocaridae]
  • Lenadiscus, Repina 1965 [Agnostida]
  • Lenaella [Problematica]
  • Lenaella [Scenellidae]
  • Lenalitus [Hyolithida]
  • Lenallina, Repina 1990 [Olenellida]
  • Lenaspis, Survorova 1959 [Corynexochida]
  • Lenatella [Palaeocopida]
  • Lenatoechia [Trigonirhynchiidae]
  • Lenella [Pterioida]
  • Lenicyamidia [Fibulariidae]
  • Leniechinus [Clypeasteroida]
  • Leniocythere [Podocopida]
  • Lenita [Clypeasteroida]
  • Lenitrophon, Finlay 1927 [Muricidae]
  • Lenneocrinus, Jaekel 1918 [Monobathrida]
  • Lennukella [Palaeocopida]
  • Lenobelus [Belemnitida]
  • Lenocyathus [Ajacicyathida]
  • Lenodus [Conodontophorida]
  • Lenotropites, Y. N. Popov 1961 [Longobarditidae]
  • Lenticeras, Gerhardt 1898 [Sphenodiscidae]
  • Lenticorbula [Myoida]
  • Lenticularis [Bellerophontida]
  • Lenticulina, Lamarck 1804 [Nodosariidae]
  • Lenticulinella [Foraminifera]
  • Lentidium, Cristofori 1832 [Corbulidae]
  • Lentigo, Jousseaume 1886 [Strombidae]
  • Lentilla [Pterioida]
  • Lentipecten, Marwick 1928 [Pectinidae]
  • Lentitheca, Sysoyev 1958 [Orthothecidae]
  • Lenzia [Theodossiidae]
  • Leocephalus, Ivshin 1962 [Ptychopariida]
  • Leochlamys [Pectinidae]
  • Leodia [Mellitidae]
  • Leolasma, Kaljo 1956 [Streptelasmatidae]
  • Leonardoceras [Oncocerida]
  • Leonardophyllum, Moore and Jeffords 1941 [Verbeekiellidae]
  • Leonaspis, R. Richter and E. Richter 1917 [Odontopleuridae]
  • Leonotus [Chondrichthyes]
  • Leontiella [Obolidae]
  • Leopecten, Masuda 1971 [Pectinidae]
  • Leopoldia, Mayer-Eymar 1887 [Neocomitidae]
  • Lepadocystis [Rhombifera]
  • Lepadolepis, White and Moy-Thomas 1940 [Antiarcha]
  • Lepas, Linnaeus 1758 [Lepadidae]
  • Leperditella [Palaeocopida]
  • Leperditelloides [Palaeocopida]
  • Leperditia, Rouault 1851 [Leperditiidae]
  • Leperditicopida, order, Scott 1961 [Ostracoda]
  • Lepeta, Gray 1842 [Lepetidae]
  • Lepetella, Verrill 1880 [Lepetellidae]
  • Lepiconus, Stoppani 1857 [Scleractinia]
  • Lepicythara, Olsson 1964 [Turridae]
  • Lepidaspis, Dineley and Loeffler 1976 [Corvaspididae]
  • Lepidechinus [Lepidocentridae]
  • Lepidenteron [Terebellomorpha]
  • Lepidesthes [Lepidesthidae]
  • Lepidion, Swainson 1838 [Moridae]
  • Lepidocalix [Diploporita]
  • Lepidocardia [Cardiida]
  • Lepidochitona, Gray 1821 [Ischnochitonidae]
  • Lepidocoleomorpha, order, Schallreuter 1985 [Machaeridia]
  • Lepidocoleus, Faber 1886 [Lepidocoleomorpha]
  • Lepidoconia, Wilson 1946 [Hemicystitidae]
  • Lepidocottus, Sauvage 1875 [Scorpaeniformes]
  • Lepidocyclina [Lepidocyclinidae]
  • Lepidocycloides [Trigonirhynchiidae]
  • Lepidocyclus, Y. Wang 1949 [Rhynchotrematidae]
  • Lepidocystis, Foerste 1938 [Imbricata]
  • Lepidodiscus, Meek and Worthen 1868 [Agelacrinitidae]
  • Lepidogobius, Gill 1859 [Perciformes]
  • Lepidoleptaena [Rafinesquinidae]
  • Lepidomena [Leptellinidae]
  • Lepidophyllia, Duncan 1868 [Stylophyllidae]
  • Lepidopleurus, Gray 1847 [Leptochitonidae]
  • Lepidoproetus, Erben 1951 [Tropidocoryphidae]
  • Lepidopus, Gouan 1770 [Perciformes]
  • Lepidorbitoides [Lepitorbitoididae]
  • Lepidorhombus, Guenther 1862 [Pleuronectiformes]
  • Lepidorthis [Glyptorthidae]
  • Lepidosemicyclina [Foraminifera]
  • Lepidospongia, Roemer 1864 [Ventriculitidae]
  • Lepidotrigla, Guenther 1860 [Scorpaeniformes]
  • Lepidotrochus [Cirridae]
  • Lepidozona, Pilsbry 1892 [Ischnochitonidae]
  • Lepismatina [Lepismatinidae]
  • Lepisosteus, de Lacepde 1803 [Lepisosteidae]
  • Lepocrinites [Rhombifera]
  • Lepophidium [Ophididae]
  • Leporemax, Iredale 1937 [Volutidae]
  • Leporicypraea [Neotaenioglossa]
  • Leporimetus [Cardiida]
  • Lepralia [Lepraliidae]
  • Lepralina [Cheilostomata]
  • Leproconcha [Pterioida]
  • Lepsiella, Iredale 1912 [Muricidae]
  • Lepsithais [Neogastropoda]
  • Leptaena, J. W. Dalman 1828 [Rafinesquinidae]
  • Leptaenisca [Leptaenoideidae]
  • Leptaenoidea [Leptaenoideidae]
  • Leptaenomendax [Leptaenoideidae]
  • Leptaenopyxis [Rafinesquinidae]
  • Leptagonia [Rafinesquinidae]
  • Leptaleoceras, Buckman 1918 [Hildoceratidae]
  • Leptalosia [Strophalosiidae]
  • Leptastrea, Milne-Edwards and Haime 1848 [Faviidae]
  • Leptathyris [Athyrididae]
  • Leptaxinus, Verrill 1898 [Thyasiridae]
  • Leptechinus [Phymosomatidae]
  • Leptechioceras [Echioceratidae]
  • Leptecodon, S.W. Williston 1899 [Enchodontidae]
  • Leptegauana [Neogastropoda]
  • Leptelasma [Anthozoa]
  • Leptella [Taffiidae]
  • Leptellina, Ulrich and Cooper 1936 [Leptellinidae]
  • Leptelloidea [Leptellinidae]
  • Leptembolon [Obolidae]
  • Leptesthes [Cardiida]
  • Leptestia [Leptestiidae]
  • Leptestiina, Havlicek 1952 [Leptestiidae]
  • Lepteviella [Nuculida]
  • Lepthoplites [Cephalopoda]
  • Leptobolbina [Palaeocopida]
  • Leptobolus, Hall 1871 [Obolidae]
  • Leptobrachites [Rhizostomatida]
  • Leptocardia, Meek 1876 [Cardiidae]
  • Leptocaryorhynchus [Leiorhynchidae]
  • Leptoceras, Uhlig 1883 [Protancyloceratidae]
  • Leptocheilopora [Cribrilinidae]
  • Leptochilodiscus, Rasetti 1966 [Weymouthiidae]
  • Leptochirognathus [Conodontophorida]
  • Leptochiton, Gray 1847 [Leptochitonidae]
  • Leptochondria, Bittner 1891 [Pectinida]
  • Leptochonetes [Strophochonetidae]
  • Leptocidaris [Pedinoida]
  • Leptocoelia [Leptocoeliidae]
  • Leptocoelina [Leptocoeliidae]
  • Leptoconus, Swainson 1840 [Conidae]
  • Leptocottus, Girard 1854 [Scorpaeniformes]
  • Leptocyathus, Milne-Edwards and Haime 1850 [Caryophylliidae]
  • Leptocystis [Rhombifera]
  • Leptocythere [Podocopida]
  • Leptodesma, Hall 1883 [Pterineidae]
  • Leptodonta [Strophodontidae]
  • Leptodontella [Douvillinidae]
  • Leptograptus [Graptoloidea]
  • Leptoides [Decapoda]
  • Leptolacis, Schrammen 1937 [Craticulariidae]
  • Leptolepides [Pachycormiformes]
  • Leptomaria, E. Eudes-Deslongchamps 1864 [Pleurotomariidae]
  • Leptomitella, Rigby 1986 [Leptomitidae]
  • Leptomithrax, Miers 1876 [Majidae]
  • Leptomitus, Walcott 1886 [Leptomitidae]
  • Leptomurex [Neogastropoda]
  • Leptomussa, d'Archiardi 1867 [Mussidae]
  • Leptomya, A. Adams 1864 [Semelidae]
  • Lepton, Turton 1822 [Leptonidae]
  • Leptonotoceras [Polymorphitidae]
  • Leptopecten, Verrill 1897 [Pectinidae]
  • Leptophragma, Zittel 1877 [Craticulariidae]
  • Leptophyllaraea, Alloiteau 1952 [Haplaraeidae]
  • Leptophyllastraea, Oppenheim 1930 [Latomeandridae]
  • Leptophyllia, Reuss 1854 [Acrosmiliidae]
  • Leptopilus, Raymond 1924 [Trilobita]
  • Leptoplastides, Raw 1908 [Olenidae]
  • Leptoplastus, Angelin 1854 [Ptychopariida]
  • Leptopleurus [Temnopleuridae]
  • Leptopora [Cyclostomata]
  • Leptopoterion [Heteractinida]
  • Leptoprimitia [Palaeocopida]
  • Leptopterygius, Huene 1929 [Reptilia]
  • Leptoredlichia, Chang 1966 [Redlichiidae]
  • Leptoria, Milne-Edwards and Haime 1848 [Faviidae]
  • Leptosalenia [Salenioida]
  • Leptoscapha, Fischer 1883 [Volutidae]
  • Leptoschisma, A. Breimer and D. B. Macurda 1972 [Fissiculata]
  • Leptoscopus, Gill 1859 [Perciformes]
  • Leptoseris, Milne-Edwards and Haime 1849 [Agariciidae]
  • Leptosocyathus [Ajacicyathida]
  • Leptosolen, Conrad 1865 [Pharidae]
  • Leptosphinctes [Perisphinctidae]
  • Leptospira [Rhynchospirinidae]
  • Leptosteus, Jaeckel 1919 [Arthrodiriformes]
  • Leptostraca, order, Claus 1880 [Malacostraca]
  • Leptostrophia [Leptostrophiidae]
  • Leptostrophiella [Leptostrophiidae]
  • Leptostyrax, Williston 1900 [Eoptolamnidae]
  • Leptosurcula [Neogastropoda]
  • Leptotetragonites, Spath 1927 [Lytoceratidae]
  • Leptoteuthis [Teuthida]
  • Leptothyra, Pease 1869 [Turbinidae]
  • Leptothyrellopsis, Bitner and Pisera 1979 [Terebratulida]
  • Leptothyropsis [Turbinidae]
  • Leptotrigonia [Trigoniida]
  • Leptotriticites [Schwagerinidae]
  • Leptotrypa [Trepostomida]
  • Leptotrypella, Vinassa de Regny 1921 [Atactotoechidae]
  • Lercarella [Monticuliferidae]
  • Lercaritubus [Preperonidellidae]
  • Lermontovia, Suvorova 1956 [Redlichiida]
  • Lernella [Foraminifera]
  • Lerouxia [Demospongea]
  • Leshanella, Li 1975 [Archaeocopida]
  • Lesleya [Podocopida]
  • Lesliella [Anthozoa]
  • Lesperonia [Archaeogastropoda]
  • Lessnikovaea, Sokolov 1951 [Billingsariidae]
  • Lestidiops [Alepisauriformes]
  • Lestrodus [Edestidae]
  • Lethops, Hubbs 1926 [Perciformes]
  • Leuconia [Calcaronea]
  • Leucorhynchia, Crosse 1867 [Turbinidae]
  • Leucosia, Weber 1795 [Leucosiidae]
  • Leucosilia, Bell 1855 [Leucosiidae]
  • Leucosyrinx, Dall 1889 [Turridae]
  • Leucozonia, Gray 1847 [Fasciolariidae]
  • Leufroyia [Neogastropoda]
  • Leukadiella [Hildoceratidae]
  • Leukomoides [Cardiida]
  • Leupoldina [Foraminifera]
  • Leurelasma [Anthozoa]
  • Leuresthes, Jordan and Gilbert 1880 [Atheriniformes]
  • Leuroactis [Cardiida]
  • Leuroceras, Hyatt 1893 [Trigonoceratidae]
  • Leurorthoceras, Foerste 1921 [Actinoceratidae]
  • Leurospondylus, Brown 1913 [Elasmosauridae]
  • Leurotrochoceras, Foerste 1926 [Lechritrochoceratidae]
  • Leutorhinion [Conodontophorida]
  • Leveillites [Graptolithina]
  • Levella [Archaeogastropoda]
  • Levenea [Dalmanellidae]
  • Leviathania [Neotaenioglossa]
  • Levibiseptum [Ambocoeliidae]
  • Leviceraurus, Hessin 1988 [Phacopida]
  • Leviconchidiella [Gypidulidae]
  • Levicyathus, Filkorn 1994 [Turbinoliidae]
  • Leviechinus [Somaliasteridae]
  • Leviella [Podocopida]
  • Levifenestella [Fenestellidae]
  • Levifusus, Conrad 1865 [Melongenidae]
  • Levigatella, Andronov 1961 [Gypidulidae]
  • Levipugnax [Rozmanariidae]
  • Levipustula [Productellidae]
  • Levisaspis, Rasetti 1943 [Norwoodiidae]
  • Levisella, Ulrich 1930 [Idahoiidae]
  • Levisettius [Phyllodocemorpha]
  • Levisia, Walcott 1911 [Trilobita]
  • Levisoceras, Foerste 1925 [Ellesmeroceratidae]
  • Levispira [Lissatrypidae]
  • Levisulculus [Palaeocopida]
  • Levitusia [Productellidae]
  • Lewesiceras, Spath 1939 [Pachydiscidae]
  • Lewinskia [Neotaenioglossa]
  • Lewisiella [Ataphridae]
  • Lewyites [Diplomoceratidae]
  • Leymeriella [Leymeriellidae]
  • Liagnshanella [Ostracoda]
  • Liantuoia [Arthropoda]
  • Liaohenia [Neotaenioglossa]
  • Liaoningella, Lu and Qian 1983 [Asaphida]
  • Liaoyangaspis, Chang 1957 [Asaphiscidae]
  • Liardiphyllum, Sutherland 1954 [Uraliniidae]
  • Liardites, E. T. Tozer 1963 [Trachyceratidae]
  • Liasina [Pontocyprididae]
  • Liasopteron [Podocopida]
  • Libanoberyx, Gayet 1980 [Beryciformes]
  • Libanoteuthis, Kretzoi 1942 [Teuthida]
  • Libertella, Hu 1971 [Phacopida]
  • Libinia, Leach 1815 [Epialtidae]
  • Libodiscus [Problematica]
  • Libotonius, Wilson 1977 [Perciformes]
  • Librovitschiceras, Shimanskiy 1957 [Aipoceratidae]
  • Libumella [Aparchitidae]
  • Libyaconchus [Bivalvia]
  • Libyaeglossa [Obolidae]
  • Libyaerhynchus [Trigonirhynchiidae]
  • Libycerithium [Neotaenioglossa]
  • Libycoceras [Sphenodiscinae]
  • Libys [Productidae]
  • Libys [Coelacanthidae]
  • Lichakephalina, Antsygin 1973 [Lichida]
  • Lichakephalus, Sdzuy 1955 [Lichakephalidae]
  • Lichapyge, Callaway 1874 [Ceratopygidae]
  • Licharewia [Licharewiidae]
  • Lichas, Dalman 1826 [Lichidae]
  • Lichenalia [Cystoporata]
  • Lichenaria, Winchell and Schuchert 1895 [Lichenariidae]
  • Lichengia, Kobayashi 1942 [Asaphida]
  • Lichenoides, Barrande 1846 [Diploporita]
  • Lichenopora [Lichenoporidae]
  • Lichenotrypa [Cystoporata]
  • Lichida, order, R. C. Moore 1959 [Trilobita]
  • Lichnatrypa [Atrypidae]
  • Lichuanopora [Disjectoporidae]
  • Lichuanospongia, Zhang 1983 [Sebargasiidae]
  • Lichvinia [Palaeocopida]
  • Licmosinion [Lychniscosa]
  • Licnograptus [Dendroidea]
  • Lidaconus [Problematica]
  • Liebusella [Foraminifera]
  • Lienardia [Neogastropoda]
  • Lievinella [Rhipidiothyrididae]
  • Ligatella [Neotaenioglossa]
  • Ligerina [Podocopida]
  • Ligiscus, Lane and Owens 1982 [Styginidae]
  • Ligonodina [Conodontophorida]
  • Ligulalepis, Schultze 1968 [Sarcopterygii]
  • Ligulella [Pachycormiformes]
  • Liguloclema [Etherellidae]
  • Ligyrokala [Mollusca]
  • Likinia [Hydrozoa]
  • Lilangina [Pterioida]
  • Lilax, Finlay 1926 [Siliquariidae]
  • Liliaspis [Pteraspidomorphes]
  • Liliocrinus [Millericrinida]
  • Liljevallia [Leptaenoideidae]
  • Lilliputianella [Foraminifera]
  • Lilloettia, Crickmay 1930 [Sphaeroceratidae]
  • Liloa, Pilsbry 1921 [Cephalaspida]
  • Lima, Bruguière 1797 [Limidae]
  • Limacina, Bosc 1817 [Limacinidae]
  • Limaites [Cephalopoda]
  • Limanda, Gottsche 1835 [Pleuronectiformes]
  • Limanomia [Pterioida]
  • Limarca, Tate 1886 [Philobryidae]
  • Limaria, Link 1807 [Limidae]
  • Limatia [Palaeocopida]
  • Limatuella [Pterioida]
  • Limatula, Wood 1839 [Limidae]
  • Limatulina [Pterioida]
  • Limbatrypa [Punctatrypidae]
  • Limbifera [Productellidae]
  • Limbimurina [Rafinesquinidae]
  • Limbinaria [Palaeocopida]
  • Limbinariella [Palaeocopida]
  • Limburgina [Podocopida]
  • Limea, Bronn 1831 [Limidae]
  • Limipecten, Girty 1903 [Aviculopectinidae]
  • Limneria [Neotaenioglossa]
  • Limopsis, Sassi 1827 [Limopsidae]
  • Limoptera, Hall 1869 [Pterineidae]
  • Limpeina, Ogienko 1984 [Ptychopariida]
  • Limpidograptus [Graptoloidea]
  • Limstrophina [Parallelelasmatidae]
  • Limulatys, Iredale 1936 [Cephalaspida]
  • Limulavida, order, Walcott 1912 [Merostomoidea]
  • Limulitella [Xiphosurida]
  • Limuloides [Xiphosurida]
  • Limulus [Xiphosurida]
  • Linaresia [Foraminifera]
  • Linchengoceras, Obata 1940 [Cephalopoda]
  • Linderina [Foraminifera]
  • Lindisfarnia [Podocopida]
  • Lindstroemella, Hall and Clarke 1892 [Disciniidae]
  • Lindstroemia, Nicholson and Thomson 1876 [Lindstroemiidae]
  • Lindstroemophyllum, Wang 1947 [Amplexidae]
  • Linearia (Conrad 1860) [Tellinidae]
  • Lineastroma, Khalfina and Yavorsky [Stromatoporidae]
  • Linemera [Rissoidae]
  • Linetia, Chavan 1959 [Mactromyidae]
  • Linevitus, Syssoiev 1958 [Sulcavitidae]
  • Linga, de Gregorio 1885 [Lucinidae]
  • Lingatrypa [Lissatrypidae]
  • Linglingella [Archaeogastropoda]
  • Lingshanella [Meganterididae]
  • Linguaclymenia, Korn and Price 1987 [Kosmoclymeniidae]
  • Linguagnostus, Kobayashi 1939 [Diplagnostidae]
  • Linguaphillipsia, C.J. Stubblefield 1948 [Proetidae]
  • Linguaproetus, Alberti and Ruchholz 1964 [Proetida]
  • Linguatornoceras, House 1965 [Tornoceratidae]
  • Linguchuangia, Zhang 1983 [Corynexochida]
  • Linguisaukia, Peng 1984 [Saukiidae]
  • Lingukainella, Kobayashi 1953 [Asaphida]
  • Lingula, Bruguiére 1797 [Lingulidae]
  • Lingulapholis, Schuchert 1913 [Craniopsidae]
  • Lingularia, Biernat and Emig 1993 [Lingulidae]
  • Lingulasma [Lingulasmatidae]
  • Lingulata, class, Gorjansky and Popov 1985 [Linguliformea]
  • Lingulella, Salter 1866 [Obolidae]
  • Lingulellotreta, Koneva 1983 [Lingulellotretidae]
  • Lingulepis [Obolidae]
  • Lingulibolina [Palaeocopida]
  • Lingulina [Lagenidae]
  • Lingulipora, Girty 1898 [Lingulida]
  • Lingulobolus [Obolidae]
  • Lingulocystis, Thoral 1935 [Lingulocystidae]
  • Lingulodiscina, Whitfield 1890 [Disciniidae]
  • Lingulogavelinella [Gavelinellidae]
  • Lingulonodosaria [Ichthyolariidae]
  • Lingulops [Obolidae]
  • Linguopugnoides [Camarotoechiidae]
  • Lingyunites [Galfettitidae]
  • Liniaxis [Neogastropoda]
  • Linnarssonella, C. Walcott 1902 [Acrotretidae]
  • Linnarssonia, Walcott 1885 [Acrotretidae]
  • Linobrachiocrinus, Goldring 1939 [Cladida]
  • Linochitina [Rhizopodea]
  • Linochone, Schrammen 1937 [Cylindrophymatidae]
  • Linocrinus, Goldring 1939 [Cladida]
  • Linograptus [Graptoloidea]
  • Linonema, Laubenfels 1955 [Euretidae]
  • Linoporella, Schuchert and Cooper 1931 [Linoporellidae]
  • Linoprotonia [Monticuliferidae]
  • Linopyrga [Pyramidellidae]
  • Linostrophomena [Glyptomenidae]
  • Linotaxis [Fenestrata]
  • Linotrigonia, van Hoepen 1929 [Trigoniidae]
  • Linsayella [Palaeocopida]
  • Linsdallia [Pterioida]
  • Linstroemoceras [Ascocerida]
  • Linter, L. W. Stephenson 1937 [Arcidae]
  • Linterella [Trigonirhynchiidae]
  • Linthia, Desor 1853 [Schizasteridae]
  • Linucula, J.A. Marwick 1931 [Nuculidae]
  • Linuparus, A. White 1847 [Palinuridae]
  • Linxiangxiella [Rhynchonellata]
  • Lioberus, Dall 1898 [Mytilidae]
  • Liobole, R. Richter and E. Richter 1949 [Proetidae]
  • Liobolina, R. Richter and E. Richter 1949 [Proetidae]
  • Liocare, Suvorova 1981 [Ptychopariida]
  • Liocarenus, Harris & Burrows 1891 [Cephalaspida]
  • Liocaris, Van Straelen 1924 [Decapoda]
  • Lioceratoides, Spath 1919 [Hildoceratidae]
  • Liocerithium, Tryon 1887 [Cerithiidae]
  • Liochlamys, Dall 1889 [Fasciolariidae]
  • Liocium [Neotaenioglossa]
  • Lioclemella [Trepostomida]
  • Liocnemis, Kielan 1960 [Pterygometopidae]
  • Liocoelia [Meristidae]
  • Lioconcha, Mörch 1853 [Veneridae]
  • Liocyma, Dall 1870 [Veneridae]
  • Liodesmus, Wagner 1859 [Amiidae]
  • Liodonax [Cardiida]
  • Lioharpes, Whittington 1950 [Harpetidae]
  • Liokootenia, Qiu 1983 [Corynexochida]
  • Lioleptaena [Rafinesquinidae]
  • Liolophops, Struve 1972 [Phacopida]
  • Liomegalaspides, Lu and Chang 1974 [Asaphidae]
  • Liomesus [Neogastropoda]
  • Liomolgocrinus, Strimple 1963 [Monobathrida]
  • Lioparella, Kobayashi 1937 [Proasaphiscidae]
  • Lioparia, Lorenz 1905 [Asaphiscidae]
  • Liopelta, Suvorova 1981 [Ptychopariida]
  • Liopeplum, Dall 1890 [Volutidae]
  • Liopistha, Meek 1864 [Poromyidae]
  • Lioporida [Trepostomida]
  • Liosolenopleura, Thoral 1947 [Ptychopariida]
  • Liosphaera [Spumellaria]
  • Liosphinctes [Cephalopoda]
  • Liospiriferina, Rousselle 1977 [Spiriferinidae]
  • Liostracina, Monke 1903 [Liostracinidae]
  • Liostracinoides, Raymond 1937 [Asaphida]
  • Liostracus [Andrarinidae]
  • Liostrea, Douvill 1904 [Gryphaeidae]
  • Liostrophia, Cooper and Kindle 1936 [Parastrophinidae]
  • Liotella [Archaeogastropoda]
  • Lioteuthis, Naef 1921 [Lioteuthididae]
  • Liothyrella, Thomson 1916 [Terebratulidae]
  • Liothyris, Conrad 1873 [Tellinidae]
  • Liotia, Gray 1842 [Liotiidae]
  • Liotina, Fischer 1885 [Liotiidae]
  • Liotrigonia [Trigoniida]
  • Liparoceras, Hyatt 1867 [Liparoceratidae]
  • Liparocrinus, Goldring 1923 [Glossocrinidae]
  • Lipinella [Biseriamminidae]
  • Lipinellina [Foraminifera]
  • Lipmanium, Pessagno 1969 [Neosciadiocapsidae]
  • Lipopora [Anthozoa]
  • Lippistes, Monfort 1810 [Capulidae]
  • Lippsina [Foraminifera]
  • Lipsanocystis [Rhombifera]
  • Lipuites [Tibetitidae]
  • Liracassis [Neotaenioglossa]
  • Lirachiton [Neoloricata]
  • Liracraea [Neogastropoda]
  • Liramia [Capillithyrididae]
  • Liraspirifer [Cyrtospiriferidae]
  • Liratilia [Neogastropoda]
  • Liratomina [Neogastropoda]
  • Liriamnica, Shergold 1980 [Trilobita]
  • Liricamera [Camerellidae]
  • Liriospyris, Haeckel 1881 [Triospyrididae]
  • Liriplica [Punctospiriferidae]
  • Liripora [Cyclostomata]
  • Lirobittium [Neotaenioglossa]
  • Lirocingula [Neotaenioglossa]
  • Lirodiscus, Conrad 1869 [Astartidae]
  • Lirofusus, Conrad 1865 [Fasciolariidae]
  • Liromissus [Cardiida]
  • Lironoba [Neotaenioglossa]
  • Lirophora, Conrad 1863 [Veneridae]
  • Lirosceles, Jordan 1925 [Scorpaeniformes]
  • Lirosoma [Fasciolariidae]
  • Lirotheca [Hyolithida]
  • Lirularia, Dall 1909 [Trochidae]
  • Lisania, Walcott 1911 [Lisaniidae]
  • Lisaniella, Chang 1963 [Lisaniidae]
  • Lisbonia [Neogastropoda]
  • Lischkeia, Fischer 1879 [Turcicidae]
  • Liscombea, Ross 1961 [Plasmoporidae]
  • Lisgodus [Petalodontidae]
  • Liskeardia, Wilson 1939 [Endoceratidae]
  • Lisogoragnostus, Rozova 1988 [Phalacromidae]
  • Lisogorites, Chugaeva 1958 [Asaphidae]
  • Lispoceras, Hyatt 1893 [Trigonoceratidae]
  • Lispodesthes [Neotaenioglossa]
  • Lissajousithyris [Lissajousithyrididae]
  • Lissapiopsis [Neogastropoda]
  • Lissatrypa [Lissatrypidae]
  • Lissatrypella [Lissatrypidae]
  • Lissatrypoidea [Lissatrypidae]
  • Lissella [Wellerellidae]
  • Lissidium, Lenz 1989 [Subrianidae]
  • Lissoberyx, Patterson 1967 [Beryciformes]
  • Lissocardia, von Meyer 1851 [Litogastroidae]
  • Lissoceras, Bayle 1879 [Ammonitida]
  • Lissoceratoides [Haploceratidae]
  • Lissochilus, Zittel 1882 [Neritidae]
  • Lissochlamis [Pterioida]
  • Lissoclymenia, Korn and Price 1987 [Kosmoclymeniidae]
  • Lissocoelia, Bassler 1927 [Streptosolenidae]
  • Lissocoelina, Schuchert and Cooper 1931 [Pentameridae]
  • Lissodus, Brough 1935 [Lonchidiidae]
  • Lissoleptaena [Rafinesquinidae]
  • Lissomarginifera [Productidae]
  • Lissomuricopsis [Neogastropoda]
  • Lissonia [Cephalopoda]
  • Lissopecten, Verrill 1897 [Pterioida]
  • Lissopleura, Whitfield 1896 [Trigonirhynchiidae]
  • Lissopsis [Decapoda]
  • Lissospira [Archaeogastropoda]
  • Lissostrophia [Strophodontidae]
  • Lissotesta [Archaeogastropoda]
  • Lissotestella [Archaeogastropoda]
  • Lissothyris [Harpotothyrididae]
  • Lissotreta [Triplesiidae]
  • Listraspis [Pteraspidomorphes]
  • Listroteuthis, Naef 1922 [Teuthida]
  • Litagnostus, Rasetti 1944 [Diplagnostidae]
  • Litaspis, Suvorova 1960 [Ptychopariida]
  • Litavkaspis [Agraulidae]
  • Lithacoceras, Hyatt 1900 [Perisphinctidae]
  • Lithancylus [Cephalopoda]
  • Lithapium [Spumellaria]
  • Litharaeopsis, Beauvais 1982 [Microsolenidae]
  • Lithatractus [Spumellaria]
  • Lithelius, Haeckel 1860 [Litheliidae]
  • Lithioperna [Pterioida]
  • Lithistida, order, Schmidt 1870 [Demospongea]
  • Lithobotrys [Nassellaria]
  • Lithocalamus [Hippuritida]
  • Lithocampana [Nassellaria]
  • Lithocampe [Lithocampida]
  • Lithocarpium [Nassellaria]
  • Lithochytris, Ehrenberg 1847 [Theoperidae]
  • Lithocrinus [Sagenocrinida]
  • Lithocyclia, Ehrenberg 1847 [Coccodiscidae]
  • Lithognathus, Swainson 1839 [Perciformes]
  • Lithomelissa, Ehrenberg 1847 [Plagoniidae]
  • Lithomespilus, Haeckel 1887 [Stylosphaeridae]
  • Lithomitra [Nassellaria]
  • Lithopera, Ehrenberg 1847 [Eucyrtidiidae]
  • Lithophaga, Röding 1798 [Mytilidae]
  • Lithophylax, A. Milne-Edwards and Brocchi 1879 [Lithophylacidae]
  • Lithophyllon, Rehberg 1892 [Fungiidae]
  • Lithophysema, Stewart 1926 [Cephalaspida]
  • Lithopora [Axinellida]
  • Lithorhizostomatida, order [Scyphozoa]
  • Lithornithium [Nassellaria]
  • Lithostrobilis [Demospongea]
  • Lithostrobus [Nassellaria]
  • Lithostrotion, Fleming 1828 [Lithostrotionidae]
  • Lithostrotionella, Yabe and Hayasaka 1915 [Petalaxidae]
  • Lithostrozionoides (Alloiteau 1952) [Meandrinidae]
  • Lithotrochus, Conrad 1855 [Trochidae]
  • Litigiella [Cardiida]
  • Litilpetalichthyes [Petalichthida]
  • Litiopa, Rang 1829 [Litiopidae]
  • Litocephalus, Resser 1937 [Aphelaspididae]
  • Litoceras, Hyatt 1883 [Trocholitidae]
  • Litocrinus, Lane and Sevastopulo 1982 [Allagecrinidae]
  • Litogaster, Von Meyer 1847 [Litogastroidae]
  • Litogyroceras, Teichert and Glenister 1952 [Rutoceratidae]
  • Litometopus, Rasetti 1966 [Agnostida]
  • Litophyllum, Etheridge 1899 [Chaetetidae]
  • Litoptychius [Coelacanthiformes]
  • Litothyris [Skelidorygmidae]
  • Litotrigonia [Trigoniida]
  • Litschkovitrigonia [Trigoniida]
  • Littoraria, Griffith and Pigeon 1834 [Littorinidae]
  • Littorina, Ferussac 1821 [Littorinidae]
  • Littorinolacuna [Neotaenioglossa]
  • Littorinopsis [Neotaenioglossa]
  • Littorniscala [Neotaenioglossa]
  • Lituites, Bertrand 1763 [Lituitidae]
  • Lituola [Lituolidae]
  • Lituolipora [Foraminifera]
  • Lituonelloides [Foraminifera]
  • Lituotuba, Rhumbler 1895 [Lituotubidae]
  • Lituotubella [Foraminifera]
  • Lituyapecten [Pterioida]
  • Litvolasma [Anthozoa]
  • Liujiangolepis, Wang 1987 [Antiarcha]
  • Liujingnia [Podocopida]
  • Livarella, Kozur and Mostler 1981 [Livarellidae]
  • Livonia, Gray 1855 [Volutidae]
  • Liwia, Dzik and Lendzion 1988 [Liwiidae]
  • Lixatrypa [Karpinskiidae]
  • Lixouria [Podocopida]
  • Liza, Jordan and Swain 1884 [Perciformes]
  • Ljaschenkovia, Batrukova 1969 [Trematidae]
  • Ljaschenkovites [Tentaculitida]
  • Ljubimovella [Podocopida]
  • Ljudmilispirifer [Adolfiidae]
  • Llandeilochiton [Neoloricata]
  • Llandovacaste, Edgecom 1993 [Phacopida]
  • Llanoaspidella, Tasch 1951 [Llanoaspididae]
  • Llanoaspis, Lochman 1938 [Llanoaspididae]
  • Llanoella [Camerellidae]
  • Lloydolithus, Bancroft 1933 [Trinucleidae]
  • Lobalocrinus, Knapp 1969 [Cladida]
  • Lobantale, Cossmann 1888 [Gadilinidae]
  • Lobatula [Foraminifera]
  • Lobendoceras, Teichert and Glenister 1954 [Proterocameroceratidae]
  • Lobianchia, Gatt 1904 [Myctophidae]
  • Lobiochrea, Val'kov and Sysoev 1970 [Trilobozoa]
  • Loboarochiton [Neoloricata]
  • Lobobactrites, Schindewolf 1932 [Bactritidae]
  • Lobocarcinus, Reuss 1857 [Cancridae]
  • Lobocephalina, Ruzicka 1940 [Conokephalinidae]
  • Lobocorallium, Nelson 1963 [Streptelasmatidae]
  • Lobocyclendoceras [Endocerida]
  • Lobograptus [Graptoloidea]
  • Loboidothyropsis [Lobothyrididae]
  • Lobokosmokeras [Kosmoceratidae]
  • Lobolytoceras, Buckman 1923 [Lytoceratidae]
  • Lobomelocrinus, Frest and Strimple 1977 [Monobathrida]
  • Lobonotus, A. Milne-Edwards 1863 [Tumidocarcinidae]
  • Lobophyllia, Blainville 1830 [Mussidae]
  • Lobopora [Cheilostomata]
  • Lobopsammia, Milne-Edwards and Haime 1848 [Dendrophylliidae]
  • Lobopterus, Gorjanovic-Kramberger 1895 [Beryciformes]
  • Lobopyge, Pribyl and Erben 1952 [Lichidae]
  • Loborina [Lambdarinidae]
  • Loboseris, Beauvais 1982 [Latomeandridae]
  • Lobosiphon, Flower 1956 [Proterocameroceratidae]
  • Lobosoecia [Cyclostomata]
  • Lobosphinctes [Perisphinctidae]
  • Lobotornoceras, Schindewolf 1936 [Tornoceratidae]
  • Lochkothele, Havlicek and Mergl 1988 [Disciniidae]
  • Lochkovella, Chlupac 1972 [Phacopidae]
  • Lochmaeosmilia, Wells 1943 [Amphiastreidae]
  • Lochmanaspis, Ivshin 1962 [Ptychopariida]
  • Lochriea [Conodontophorida]
  • Lockhartia [Rotaliidae]
  • Lockportia [Polychaeta]
  • Locularia [Cyclostomata]
  • Loculibairdia [Podocopida]
  • Loculibolbina [Palaeocopida]
  • Loculicyathus [Archaeocyathida]
  • Loculicytheretta [Podocopida]
  • Loculipora [Fenestrata]
  • Loculitheca, Sysoyev 1968 [Turcuthecidae]
  • Loculocavata [Palaeocopida]
  • Loczyceras [Cephalopoda]
  • Lodderena [Archaeogastropoda]
  • Lodderia [Archaeogastropoda]
  • Loeblichia [Loeblichiidae]
  • Loemmelella [Pterioida]
  • Loenthyris [Terebratulida]
  • Loerentheya, Beurlen 1929 [Retroplumidae]
  • Loftusia [Loftusiidae]
  • Loganella [Rhipidomellidae]
  • Loganellia, Fredholm 1990 [Loganelliidae]
  • Loganellus, Devine 1863 [Idahoiidae]
  • Loganoceras, Foerste 1932 [Oncoceratidae]
  • Loganograptus, Hall 1868 [Graptoloidea]
  • Loganopeltis, Rasetti 1943 [Ptychopariida]
  • Loganopeltoides, Rasetti 1945 [Harpididae]
  • Logocrinus, W. Goldring 1923 [Poteriocrinidae]
  • Loilemia [Lissatrypidae]
  • Loisthostomata [Foraminifera]
  • Lokius [Palaeocopida]
  • Lokutella [Prionorhynchiidae]
  • Loligo, Schneider 1784 [Teuthida]
  • Loligosepia, Quenstedt 1839 [Loligosepiidae]
  • Lomasulcachites [Siphogonuchitidae]
  • Lomatiocyathus [Cribricyathea]
  • Lomatiphora [Productidae]
  • Lomatobolbina [Palaeocopida]
  • Lomatopisthia [Palaeocopida]
  • Lomatorthis [Glyptorthidae]
  • Lombardia [Problematica]
  • Lomia [Thecosomata]
  • Lomirosa, L. W. Stephenson 1941 [Melongenidae]
  • Lomonossovella [Cephalopoda]
  • Lompoquia, Jordan and Gilbert 1919 [Perciformes]
  • Lomsucaspis [Trilobita]
  • Lonchidium, D'Eichwald 1860 [Turmalitidae]
  • Lonchistium, Myers 1935 [Perciformes]
  • Lonchocephalus, Owen 1852 [Lonchocephalidae]
  • Lonchocrinus, Jaekel 1908 [Cyrtocrinida]
  • Lonchodina [Prioniodidae]
  • Lonchodomas, Angelin 1854 [Raphiophoridae]
  • Lonchograptus [Graptoloidea]
  • Lonchosaccus [Problematica]
  • Loncodelphis [Cetacea]
  • Londinia [Podocopida]
  • Longaeviceras [Cadoceratidae]
  • Longaevus [Cribricyathea]
  • Longchaeus, Mörch 1875 [Pyramidellidae]
  • Longdongshuia [Pugnacidae]
  • Longduia, Lu et al. [Corynexochida]
  • Longianda, Hupe 1952 [Redlichiida]
  • Longiapertina [Hauerinidae]
  • Longicyathus [Cribricyathea]
  • Longidaonella [Pterioida]
  • Longidorsa [Palaeocopida]
  • Longimactra, Finlay 1928 [Mactridae]
  • Longiproetus, Cavet and Pillet 1958 [Proetidae]
  • Longiscula [Metacopida]
  • Longispina [Chonetidae]
  • Longithyris [Terebratulida]
  • Longitubus [Serpulimorpha]
  • Longlinophyllia [Heterocorallia]
  • Longobardites, E. v. Mojsisovics 1882 [Longobarditidae]
  • Longobarditoides, A. A. Shevyrev 1961 [Longobarditidae]
  • Longoconcha, L. W. Stephenson 1941 [Pholidotomidae]
  • Longulatus [Tentaculitida]
  • Longusorbis, B. Richards 1975 [Longusorbiidae]
  • Longxianirhynchia [Trigonirhynchiidae]
  • Longyuanella [Podocopida]
  • Lonsda [Hexactinosa]
  • Lonsdaleia, McCoy 1849 [Axophyllidae]
  • Lonsdaleoides, Heritsch 1936 [Geyerophyllidae]
  • Loomberaphyllum, Pedder 1965 [Cyathophyllidae]
  • Looneyella [Podocopida]
  • Lopadiocrinus, Wanner 1916 [Cladida]
  • Lopanella [Hexactinosa]
  • Loparia [Cardiida]
  • Lopasnia [Productidae]
  • Lopatinia, Schmidt 1872 [Cucullaeidae]
  • Loperia [Protorthidae]
  • Lopha, Röding 1798 [Ostreidae]
  • Lophamplexus, Moore and Jeffords 1941 [Lophophyllidae]
  • Lophar, Jordan and Gilbert 1919 [Perciformes]
  • Lophelia, Milne-Edwards and Haime 1849 [Caryophylliidae]
  • Lophiiformes, order [Actinopteri]
  • Lophiodolodus, Stirton 1947 [Mammalia]
  • Lophiokephalion, Kobayashi 1988 [Proetida]
  • Lophiostomus, Egerton 1852 [Furidae]
  • Lophiostroma, Nicholson 1891 [Lophiostromatidae]
  • Lophioturris [Turridae]
  • Lophobalanus [Cirripedia]
  • Lophoblastus, R. R. Rowley 1901 [Spiraculata]
  • Lophocardium, Fischer 1887 [Cardiidae]
  • Lophocarinophyllum, Grabau 1922 [Lophophyllidiidae]
  • Lophoceras, Hyatt 1893 [Koninckioceratidae]
  • Lophoclema [Cystoporata]
  • Lophocochlias, Pilsbry 1921 [Turbinidae]
  • Lophoconus [Nassellaria]
  • Lophocorys [Nassellaria]
  • Lophocrinus, Meyer 1858 [Cladida]
  • Lophoctenella [Podocopida]
  • Lophocyrtis, Haeckel 1887 [Lophocyrtiidae]
  • Lophocythere [Podocopida]
  • Lophodentina [Podocopida]
  • Lophogaster [Lophogastrida]
  • Lophogastrida, order, G. O. Sars 1870 [Malacostraca]
  • Lophoholcus, Opik 1976 [Asaphida]
  • Lophokloedenia, Swartz and Whitmore 1956 [Beyrichiidae]
  • Lopholasma, Simpson 1900 [Stereolasmatidae]
  • Lopholepsis [Cyclostomata]
  • Lopholobites [Pulchelliidae]
  • Lophopanopeus, Rathbun 1898 [Panopeidae]
  • Lophophaena, Ehrenberg 1847 [Lophophaenidae]
  • Lophophrentis, Chi 1935 [Aulophyllidae]
  • Lophophyllidium, Grabau 1928 [Lophophyllidiidae]
  • Lophophyllum, Milne-Edwards and Haime 1850 [Lophophyllidae]
  • Lophoranina, R. Fabiani 1910 [Palaeocorystidae]
  • Lophoraninella, Glaessner 1946 [Raninidae]
  • Lophosaukia, Shergold 1971 [Saukiidae]
  • Lophosmilia, Milne-Edwards and Haime 1848 [Caryophylliidae]
  • Lophospyris, Haeckel 1881 [Triospyrididae]
  • Lophosteus, Pander 1856 [Osteichthyes]
  • Lophotichium, Moore and Jeffords 1945 [Lophotichiidae]
  • Lopingoceras, Shimanskiy 1962 [Spyroceratidae]
  • Lorangerella [Hypothyridinidae]
  • Lordorthis, Ross 1959 [Hesperorthidae]
  • Lordshillia, Whittard 1966 [Trinucleidae]
  • Loreleiella [Eodevonariidae]
  • Lorenzella, Kobayashi 1935 [Lorenzellidae]
  • Lorenziella [Calpionellida]
  • Lorica, H. Adams and A. A 1852 [Schizochitonidae]
  • Loricella, Pilsbry 1893 [Schizochitonidae]
  • Loriculina, Dames 1885 [Stramentidae]
  • Lorieroceras, Foerste 1926 [Nothoceratidae]
  • Loriolella [Echinoidea]
  • Loriolia [Pseudodiadematidae]
  • Loriolicrinus, Jaekel 1918 [Comatulida]
  • Loriolipedina [Pedinidae]
  • Loriolithyris, Middlemiss 1968 [Sellithyrididae]
  • Lorioloceras [Oppeliidae]
  • Loriolometra [Comatulida]
  • Loripes, Poli 1791 [Lucinidae]
  • Loripinus, Monterosato 1883 [Lucinidae]
  • Lorrettina, Shergold 1971 [Dokimocephalidae]
  • Losvia [Trigonirhynchiidae]
  • Lota, Oken 1817 [Gadiformes]
  • Lotagnostus, Whitehouse 1936 [Agnostidae]
  • Lotharingella, Laurin 1984 [Rhynchonellidae]
  • Lotocrinus [Crinoidea]
  • Lotosoides, Shergold 1975 [Trilobita]
  • Lottia, Gray 1833 [Lottiidae]
  • Louisella [Miskoiidae]
  • Louisettita [Foraminifera]
  • Loutriella [Palaeocopida]
  • Louza [Podocopida]
  • Lovarina, Beschin et al. 1991 [Palaeocorystidae]
  • Lovcenipora [Hydrozoa]
  • Lovenia, Desor 1847 [Loveniidae]
  • Lovenilampas [Cassiduloida]
  • Lovetcheniia [Hippuritida]
  • Lowenstamia [Neogastropoda]
  • Lowenstamia [Magilidae]
  • Lowoceras, Foerste and Savage 1927 [Lowoceratidae]
  • Loxo [Cardiida]
  • Loxobidens [Thecosomata]
  • Loxocardium, Cossmann 1886 [Cardiidae]
  • Loxoceras, M'Coy 1844 [Orthocerida]
  • Loxochoanella, Teichert and Glenister 1954 [Ellesmeroceratidae]
  • Loxoconcha, G. O. Sars 1866 [Loxoconchidae]
  • Loxoconchella [Podocopida]
  • Loxocorniculum [Podocopida]
  • Loxocrinus [Mespilocrinidae]
  • Loxocythere [Podocopida]
  • Loxodus [Conodontophorida]
  • Loxoglypta [Cardiida]
  • Loxonepea, Opik 1970 [Trilobita]
  • Loxophragma [Trepostomida]
  • Loxoptychodon [Corbiculidae]
  • Loxoptyxis [Heterostrophia]
  • Loxorynchus, Stimpson 1857 [Decapoda]
  • Loxostomina [Foraminifera]
  • Loxostomoides [Foraminifera]
  • Loxostomum [Foraminifera]
  • Loxotaphrus, Harris 1897 [Buccinidae]
  • Loxotoma, Fischer 1885 [Fissurellidae]
  • Loyolophyllum, Chapman 1914 [Stauriidae]
  • Luanquella [Chonetidae]
  • Luaspis, Hupe 1953 [Ptychopariida]
  • Lublinella [Ostracoda]
  • Lublinophyllum, Khoa 1977 [Cyathopsidae]
  • Lubowastraea, Melnikova 1986 [Zardinophyllidae]
  • Lubrzankiella [Palaeocopida]
  • Lucapina, Sowerby 1835 [Fissurellidae]
  • Lucapinella, Pilsbry 1890 [Fissurellidae]
  • Lucerapex, Iredale 1936 [Turridae]
  • Lucidestea [Neotaenioglossa]
  • Luciellina [Gosseletinidae]
  • Lucina, Bruguière 1797 [Lucinidae]
  • Lucina (Here), Gabb 1866 [Lucinidae]
  • Lucinaxinus [Cardiida]
  • Lucinella, di Monterosato 1883 [Lucinidae]
  • Luciniola, Skeat and Madsen 1898 [Lucinidae]
  • Lucinisca, Dall 1901 [Lucinidae]
  • Lucinoma, Dall 1901 [Lucinidae]
  • Luciploma, Olsson 1942 [Veneridae]
  • Luciter [Palaeocopida]
  • Ludbrookia [Carditidae]
  • Ludfordina [Rafinesquinidae]
  • Ludictyon, Ozaki 1938 [Aulaceratidae]
  • Ludvigsenites [Ostracoda]
  • Ludwigia [Graphoceratidae]
  • Lugalella, G. Hahn and I. Wunn-Petry 1983 [Proetidae]
  • Lugoviella [Mitrosagophora]
  • Lugtonia, Cummings 1955 [Foraminifera]
  • Luhaia, Roomusoks 1956 [Strophomenidae]
  • Luhocrinus [Eocrinoidea]
  • Luhops [Centropleuridae]
  • Luhotreta, Mergl and Slehoferova 1990 [Acrotretidae]
  • Luisichthys [Pachycormiformes]
  • Luisiella [Pachycormiformes]
  • Lukatiella [Problematica]
  • Lumbriconereis [Eunicemorpha]
  • Lunacephalus, Ivshin 1962 [Ptychopariida]
  • Lunacrania, Ivshin 1962 [Missisquoiidae]
  • Lunalepis, Mader 1986 [Cladoselachida]
  • Lunanoceras [Ellesmerocerida]
  • Lunarca, Gray 1857 [Arcidae]
  • Lunaspis, Broili 1929 [Petalichthida]
  • Lunatia, Gray 1847 [Naticidae]
  • Lunatriella [Foraminifera]
  • Lunella [Turbinidae]
  • Luniprisma [Metacopida]
  • Luniulicardia [Cardiida]
  • Lunolenus, Lotze 1958 [Redlichiida]
  • Lunpolaia [Capillithyrididae]
  • Lunucammina [Geinitzinidae]
  • Lunulacardium, Münster 1840 [Lunulacardiidae]
  • Lunulacyathus [Ajacicyathida]
  • Lunularia [Lunulariidae]
  • Lunulites, Lamarck 1816 [Lunulitidae]
  • Lunuloceras [Oppeliidae]
  • Luofuia, Xu 1977 [Spiriferida]
  • Luojiashania, Chang 1974 [Proetidae]
  • Luolishania [Luolishaniidae]
  • Luottuolingia [Ptychopariida]
  • Lupherella [Monotidae]
  • Lupherites [Cephalopoda]
  • Lupira, L. W. Stephenson 1941 [Vasidae]
  • Lupitschia [Scleractinia]
  • Luponovula [Neotaenioglossa]
  • Lupopsyrus, Bernacsek and Dineley 1977 [Climatiiformes]
  • Luppovella, Nikolov 1966 [Neocomitidae]
  • Lurgiticoma, Popov 1980 [Ephippelasmatidae]
  • Lusampa, Petrunina 1990 [Trilobita]
  • Lusatiops, Richter 1941 [Ellipsocephalidae]
  • Lusitanichthys, Gavet 1980 [Clupavidae]
  • Lusitanites, Ruzhencev and Bogoslovskaya 1971 [Neoglyphioceratidae]
  • Lutema [Neogastropoda]
  • Luterella [Trigonirhynchiidae]
  • Lutesvillia, Cullison 1944 [Bathyuridae]
  • Lutetia [Kelliellidae]
  • Lutetiarcula, Elliot 1954 [Terebratulida]
  • Lutetiaster [Schizasteridae]
  • Lutima [Gastropoda]
  • Lutraria, Lamarck 1799 [Mactridae]
  • Luvarus, Rafinesque 1810 [Perciformes]
  • Luvula [Podocopida]
  • Luxella, Rasetti 1955 [Ptychopariida]
  • Luxilites [Crossognathiformes]
  • Luxocrinus, Witzke and Strimple 1981 [Diplobathrida]
  • Luxuridacna [Cardiida]
  • Luyanhaoia, Wittke 1984 [Ptychopariida]
  • Lycettia, Cox 1937 [Mytilidae]
  • Lycetticeras [Macrocephalitidae]
  • Lychniscaulus, Schrammen 1937 [Ventriculitidae]
  • Lychniscosa, order, Schrammen 1903 [Hexactinellida]
  • Lychnocanium, Ehrenberg 1847 [Eucyrtiidae]
  • Lychnocanoma, Haeckel 1887 [Ultranaporidae]
  • Lychnoceras [Oncocerida]
  • Lychnodictyum [Nassellaria]
  • Lychnothyris, Voros 1983 [Plectoconchidae]
  • Lyckholmoceras, Teichert 1930 [Diestoceratidae]
  • Lycodopsis, Collett 1879 [Gadiformes]
  • Lycodopsis, Collett 1879 [Perciformes]
  • Lyconectes, Gilbert 1895 [Perciformes]
  • Lycophoria [Lycophoriidae]
  • Lycopterocypris [Podocopida]
  • Lydiaspis, Suvorova 1981 [Ptychopariida]
  • Lydiphnis, Melvill [Adeorbidae]
  • Lyecoceras, Mutvei 1957 [Paraphragmitidae]
  • Lyelliceras, Spath 1921 [Lyelliceratidae]
  • Lygdozoon, Holloway 1981 [Dalmanitidae]
  • Lyidium [Demospongea]
  • Lyliophyllum, Kelus 1939 [Stauriida]
  • Lymnorella [Stellispongiidae]
  • Lynaspis, Opik 1967 [Asaphida]
  • Lyonicrinus, Springer 1926 [Monobathrida]
  • Lyonsia, Turton 1822 [Lyonsiidae]
  • Lyopora, Nicholson and Etheridge 1878 [Syringophyllidae]
  • Lyopsetta, Jordan and Goss 1887 [Pleuronectiformes]
  • Lyosoma [Archaeogastropoda]
  • Lyralichas, Weber 1948 [Lichida]
  • Lyratellina, Olsson 1961 [Tellinidae]
  • Lyreidus, De Haan 1841 [Palaeocorystidae]
  • Lyria, Gray 1847 [Volutidae]
  • Lyrianella [Neogastropoda]
  • Lyriaspis, Whitehouse 1939 [Ptychopariidae]
  • Lyricocarpus [Cornuta]
  • Lyrielasma, Hill 1939 [Ptenophyllidae]
  • Lyrioceras, Foerste 1927 [Nephriticeratidae]
  • Lyriochlamys, Sobetski 1977 [Pectinidae]
  • Lyriocrinus, Hall 1852 [Diplobathrida]
  • Lyriomyophoria, Kobayashi 1954 [Myophoriidae]
  • Lyriopecten, Hall 1877 [Pterinopectinidae]
  • Lyrocardium, Meek 1876 [Cardiidae]
  • Lyrocladia [Fenestellidae]
  • Lyrodesma, Conrad 1841 [Lyrodesmatidae]
  • Lyrodictya [Reticulosa]
  • Lyrodobankia [Myoida]
  • Lyrogoniatites, Miller and Furnish 1940 [Neoglyphioceratidae]
  • Lyrolepis, Romanowski 1886 [Elopiformes]
  • Lyromangelia [Neogastropoda]
  • Lyropecten, Conrad 1862 [Pectinidae]
  • Lyropora [Fenestellidae]
  • Lyroporella [Fenestrata]
  • Lyroporidra [Fenestrata]
  • Lyropurpura [Neogastropoda]
  • Lyrosurcula [Neogastropoda]
  • Lyrotyphis, Jousseaume 1880 [Muricidae]
  • Lysactinella [Hexactinellida]
  • Lysagoroceras [Discosorida]
  • Lysagoroceras, Schönenberg 1952 [Poterioceratidae]
  • Lysaretides [Eunicemorpha]
  • Lysella [Foraminifera]
  • Lysidium, Havlicek 1985 [Gypidulidae]
  • Lysigypa, Havlicek and Kukal 1990 [Gypidulidae]
  • Lysiogyrus [Neotaenioglossa]
  • Lysiosquilla [Stomatopoda]
  • Lysis [Neotaenioglossa]
  • Lysocystites [Eocrinoidea]
  • Lysogorella [Palaeocopida]
  • Lyssacinosida, order [Hexactinellida]
  • Lytechinus, A. Agassiz 1863 [Toxopneustidae]
  • Lytheoceras, Ruzhencev and Bogoslovskaya 1971 [Neoglyphioceratidae]
  • Lyticoceras, Hyatt 1900 [Neocomitidae]
  • Lytoceras, Suess 1865 [Lytoceratidae]
  • Lytoceras (Tetragonites), Kossmat 1895 [Tetragonitidae]
  • Lytocrioceras [Cephalopoda]
  • Lytodiscoides [Desmoceratidae]
  • Lytogyroceras [Cephalopoda]
  • Lytohoplites [Neocomitidae]
  • Lytvolasma, Soshkina 1925 [Antiphyllidae]
  • Lytvophyllum, Dobrolyubova 1941 [Petalaxidae]
  • Lywcea [Pterioida]
  • Maakina [Strophomenidae]
  • Mabella, Klenina 1984 [Leptellinidae]
  • Mabellarca, Iredale 1939 [Arcidae]
  • Mabiania [Problematica]
  • Mabianoconullus [Scyphozoa]
  • Macalia, H. Adams 1860 [Tellinidae]
  • Macaliopsis [Tellinidae]
  • Macandrevia [Zeilleriidae]
  • Macandrewia [Demospongea]
  • Macandrewites [Demospongea]
  • Macannaia, Jell 1975 [Eodiscidae]
  • Macarocrinus, Jaekel 1895 [Diplobathrida]
  • Maccoyella [Oxytomidae]
  • Maccoyoceras, Miller et al. 1933 [Trigonoceratidae]
  • Maccullochella, Whitley 1929 [Perciformes]
  • Macelloura, Resser 1935 [Ptychopariida]
  • Macerodus [Conodontophorida]
  • Macgeea, Webster 1889 [Phillipsastreidae]
  • Macgeopsis, Alloiteau 1957 [Ellipsosmiliidae]
  • Machaeracanthus, Newberry 1857 [Acanthodii]
  • Machaeraria [Machaerariidae]
  • Machaeratoechia [Machaerariidae]
  • Machaeridia, class [Problematica]
  • Machaerocolella, Li and Han 1980 [Trimerellidae]
  • Machaerodonax [Cardiida]
  • Machaerognathus, Hussakof and Bryant 1919 [Arthrodira]
  • Machairagnostus, Harrington and Leanza 1957 [Diplagnostidae]
  • Machinosaurus [Reptilia]
  • Machomya [Pholadomyida]
  • Macilentos [Strombidae]
  • Mackenzia, Briggs et al 1994 [Actiniaria]
  • Mackenziecyathus [Ajacicyathida]
  • Mackenziephyllum, Pedder 1971 [Cystiphyllidae]
  • Mackenziurus, Edgecom 1990 [Encrinuridae]
  • Mackerrovia [Rafinesquinidae]
  • Maclarenella [Cranaenidae]
  • Macnamaratylus [Crinoidea]
  • Macoma, Leach 1819 [Tellinidae]
  • Macoma (Panacoma), Olsson 1942 [Cardiida]
  • Macomona, Finlay 1926 [Tellinidae]
  • Macoploma (Pilsbry and Olsson 1941) [Tellinidae]
  • Macrepistius, Cope 1895 [Amiiformes]
  • Macridiscus [Cardiida]
  • Macroaulostomus, Blot 1981 [Gasterosteiformes]
  • Macroblepharum, Alberti 1964 [Tropidocoryphidae]
  • Macrocallista, Meek 1876 [Veneridae]
  • Macrocaris [Archaeostraca]
  • Macrocephalites [Macrocephalitidae]
  • Macrocheira, De Haan 1839 [Inachidae]
  • Macrochlamis [Pectinidae]
  • Macrocoelia [Rafinesquinidae]
  • Macrocrinus, Jaekel 1895 [Monobathrida]
  • Macrocypraea, Woodring 1957 [Cypraeidae]
  • Macrocyprina [Myodocopida]
  • Macrocypris [Macrocyprididae]
  • Macrocyproides [Podocopida]
  • Macrocystella, Callaway 1877 [Macrocystellidae]
  • Macrodentina [Podocopida]
  • Macrodiadema [Diadematoida]
  • Macrodomoceras, Teichert and Glenister 1952 [Polyelasmoceratidae]
  • Macrodon, Buckman 1882 [Parallelodontidae]
  • Macrodonax [Cardiida]
  • Macrodontella [Arcida]
  • Macrodostomia [Heterostrophia]
  • Macrogrammus, Whittard 1966 [Pilekiidae]
  • Macroloxoceras, Flower 1957 [Pseudorthoceratidae]
  • Macromphalus, S. W. Wood 1842 [Vanikoridae]
  • Macron, H. Adams and A. A 1853 [Pseudolividae]
  • Macroniscus, Thiele 1928 [Pseudolividae]
  • Macronoda, Lochmann 1964 [Ptychaspididae]
  • Macronotella [Aparchitidae]
  • Macropetalichthys, Norwood and Owen 1846 [Arthrodira]
  • Macrophthalmus, Latreille 1823 [Macrophthalmidae]
  • Macropipus, Prestandrea 1833 [Macropipidae]
  • Macroplata, Swinton 1930 [Rhomaleosauridae]
  • Macropleura [Cyrtiidae]
  • Macropneustes, L. Agassiz 1847 [Brissidae]
  • Macropomoides [Coelacanthiformes]
  • Macropora [Cheilostomata]
  • Macroporina [Cheilostomata]
  • Macropotamorhynchus [Trigonirhynchiidae]
  • Macropterygius, Huene 1922 [Reptilia]
  • Macropyge, Stubblefield 1927 [Ceratopygidae]
  • Macropygella, Rosov and Dubatolova 1985 [Asaphida]
  • Macrosarisa [Podocopida]
  • Macroscaphites, Meek 1876 [Macroscaphitidae]
  • Macrosemiiformes, order [Actinopteri]
  • Macrosinus [Neogastropoda]
  • Macrosolen [Cardiida]
  • Macrostylocrinus [Patelliocrinidae]
  • Macrotoxus, Lorenz 1906 [Asaphida]
  • Macrotrigonia [Trigoniida]
  • Macrourogaleus, Fowler 1947 [Paleospinacidae]
  • Macrozafra [Neogastropoda]
  • Macrurella [Neogastropoda]
  • Macruronus, Guenther 1873 [Gadiformes]
  • Macrypsilon [Podocopida]
  • Mactra, Linnaeus 1767 [Mactridae]
  • Mactrellona, Marks 1915 [Mactridae]
  • Mactrinula, Gray 1853 [Mactridae]
  • Mactrodesma [Mactridae]
  • Mactromeris, Conrad 1868 [Mactridae]
  • Mactromya, Agassiz 1843 [Mactromyidae]
  • Mactromyopsis, Chavan 1905 [Mactromyidae]
  • Mactrona [Cardiida]
  • Mactropsis [Mactridae]
  • Madariscus, Wade 1941 [Archaeomaenidae]
  • Madarocephalus, Resser 1938 [Asaphida]
  • Madiella [Neogastropoda]
  • Madiganella, Teichert and Glenister 1952 [Ruedemannoceratidae]
  • Madonia, Senowbari-Daryan and Schäfer 1986 [Agelasidae]
  • Madracis, Milne-Edwards and Haime 1849 [Astrocoeniidae]
  • Madrepora, Linne 1758 [Oculinidae]
  • Maduiya, Rozova 1963 [Aphelaspididae]
  • Madygenia, Petrunina 1975 [Rorringtoniidae]
  • Maeandrograptus [Graptoloidea]
  • Maeandropolydora, Voigt 1965 [Metazoa]
  • Maeandroseris, Rousseau 1854 [Siderastreidae]
  • Maelonoceras, A. Hyatt 1884 [Oncoceratidae]
  • Maemia [Productellidae]
  • Maenioceras, Schindewolf 1933 [Maenioceratidae]
  • Maenioceras (J. J. Sepkoski 2002) [Sporadoceratidae]
  • Maennilicrinus, Rozhnov 1988 [Crinoidea]
  • Mafoletia [Chondrichthyes]
  • Magadiceramus, Heinz 1932 [Inoceramidae]
  • Magadina, Thomson 1915 [Terebratellidae]
  • Magadinella, Thomson 1915 [Terebratellidae]
  • Magas, Sowerby 1816 [Terebratulida]
  • Magasella [Terebratellidae]
  • Magdoceras [Tarphycerida]
  • Magella [Terebratellidae]
  • Magellania, Bayle 1880 [Terebratellidae]
  • Magharina [Oppeliidae]
  • Magharithyris [Terebratulida]
  • Maghrebeis [Ostracoda]
  • Maghrebella, Freneix 1972 [Carditidae]
  • Magicostrophia [Chilidiopsidae]
  • Magila, Munster 1839 [Axiidae]
  • Magilus, Monfort 1810 [Magilidae]
  • Magnacephalus, Stitt 1971 [Ptychopariida]
  • Magnea [Cheilostomata]
  • Magnederella [Stenolaemata]
  • Magnesoina [Foraminifera]
  • Magnicanalis, Rowell 1962 [Obolellidae]
  • Magnicapulus [Archaeogastropoda]
  • Magniventra [Leptostrophiidae]
  • Magnomma, Lu and Qian 1983 [Ptychopariida]
  • Magnosia [Arbaciidae]
  • Mahaiella, Yin 1983 [Proetida]
  • Mahoningoceras [Nautilida]
  • Maiandrocyathus [Archaeocyathida]
  • Maiaspis, Chernysheva 1956 [Solenopleuridae]
  • Maichelina [Foraminifera]
  • Maikottaphyllum, Lavrusevich 1968 [Kyphophyllidae]
  • Maikottia, Lavrusevich 1967 [Tryplasmatidae]
  • Maioteuthis [Teuthida]
  • Maishucunconus [Helcionellidae]
  • Maitaia [Atomodesmatidae]
  • Maizassionis [Palaeocopida]
  • Maja, Lamarck 1801 [Majidae]
  • Majiangia, Lu and Qian 1983 [Corynexochida]
  • Majiaobaphyllum [Anthozoa]
  • Majiashanella [Ostracoda]
  • Majkopella [Diplospirellidae]
  • Majoceras [Intejocerida]
  • Majungaella [Podocopida]
  • Makaira, Lacpde 1802 [Istiophoridae]
  • Makarakia [Mollusca]
  • Makarskiana [Foraminifera]
  • Makiyama [Poecilosclerida]
  • Maklaya [Neoschwagerinidae]
  • Makridinirhynchia [Tetrarhynchiidae]
  • Malacocottus, Bean 1890 [Scorpaeniformes]
  • Malacopygaeus, Leriche 1906 [Perciformes]
  • Maladia, Rose 1983 [Eurekiidae]
  • Maladioidella, Endo 1937 [Idahoiidae]
  • Maladioides, Kobayashi 1933 [Elviniidae]
  • Malagastrigonia [Trigoniida]
  • Malaiocrinus, Wanner 1924 [Cladida]
  • Malayanoplia [Anopliidae]
  • Malayites, O. Welter 1914 [Juvavitidae]
  • Malayomaorica, Jeletzky 1963 [Buchiidae]
  • Malchiblastus [Spiraculata]
  • Maldeotaia, Singh and Shukla 1981 [Protoconodonta]
  • Malea, Valenciennes 1833 [Tonnidae]
  • Malerosteus, Kulczycki 1957 [Arthrodira]
  • Malguzaria [Palaeocopida]
  • Maligneocrinus, Laudon 1952 [Monobathrida]
  • Malinaspis, Andreeva 1985 [Ptychopariida]
  • Malinella [Orthida]
  • Malinowskiella [Demospongea]
  • Malladaia, Oehlert 1896 [Phacopida]
  • Malladaites [Hammatoceratidae]
  • Mallagnostus, Howell 1935 [Weymouthiidae]
  • Malleia [Bouchardiidae]
  • Malletia, des Moulins 1832 [Malletiidae]
  • Malletophychites [Ptychitidae]
  • Malloproductus [Sentosiidae]
  • Mallotus, Cuvier 1829 [Actinopterygii]
  • Malluvium, Melvill 1906 [Hipponicidae]
  • Malnina [Palaeocopida]
  • Malocystites [Platycystitida]
  • Malongella, Chang 1974 [Archaeocopida]
  • Malongullia, Webby and Moors 1970 [Raphiophoridae]
  • Maltaia [Terebratulidae]
  • Maltoniceras [Cardioceratidae]
  • Malumispongium [Lyssacinosida]
  • Malungia, Lu 1961 [Dolerolenidae]
  • Malurostrophia [Douvillinidae]
  • Malvinella, Wolart 1968 [Calmoniidae]
  • Malvufundus, de Gregorio 1885 [Malleidae]
  • Malykania, Suvorova 1958 [Jakutidae]
  • Malykanotheca [Orthothecida]
  • Mamayocaris [Mysidacea]
  • Mambrinia, Gardner 1939 [Cassidae]
  • Mametothyris [Mametothyrididae]
  • Mamiconus [Neogastropoda]
  • Mamillodus [Problematica]
  • Mamillopora [Mamilloporidae]
  • Mammilla, Schumacher 1817 [Naticidae]
  • Mammites, Laube and Bruder 1887 [Acanthoceratidae]
  • Mammoides [Palaeocopida]
  • Mamutinetes [Chonetidae]
  • Manacyathus [Cribricyathea]
  • Manaia [Glycymerididae]
  • Manambolites, Hourcq 1949 [Sphenodiscidae]
  • Manatus, Brunnich 1772 [Trichechidae]
  • Manawatawhia [Neotaenioglossa]
  • Manchuriella, Resser and Endo 1935 [Proasaphiscidae]
  • Manchurocephalus, Endo 1944 [Ptychopariida]
  • Manchuroceras, Ozaki 1927 [Manchuroceratidae]
  • Mancikellia [Cardiida]
  • Mancosiceras [Cephalopoda]
  • Mandalacystis [Eocrinoidea]
  • Mandaloceras, Hyatt in Zittel 1900 [Mandaloceratidae]
  • Mandawacythere [Podocopida]
  • Mandelstamia [Podocopida]
  • Mandjina [Foraminifera]
  • Mandocythere [Podocopida]
  • Mandolina [Neotaenioglossa]
  • Mandorovella [Hauerinidae]
  • Mangeroceras, Sturgeon et al. 1982 [Wiedeyoceratidae]
  • Mangiliella [Neogastropoda]
  • Mangkeluia [Carinatinidae]
  • Manicina, Ehrenberg 1834 [Faviidae]
  • Manicrinus, Frest and Strimple 1978 [Cladida]
  • Manillocrinus, Campbell and Bein 1971 [Monobathrida]
  • Manipora, Sinclair 1955 [Favositidae]
  • Manitoulinoceras, A. F. Foerste 1924 [Valcouroceratidae]
  • Manitouoceras, Ulrich et al. 1944 [Proterocameroceratidae]
  • Manjoceras [Discosorida]
  • Manlietta, Wade 1935 [Perleidiformes]
  • Mannopyge, Ludvigsen 1987 [Proetidae]
  • Mannosocmia [Ostracoda]
  • Mannschreckia [Trilobita]
  • Manoloviceras [Cephalopoda]
  • Manorella [Foraminifera]
  • Manosia, Zeng 1983 [Brachiopoda]
  • Mansina [Strophomenidae]
  • Mansuyella, Endo 1937 [Asaphida]
  • Mansuyia, Nordsieck 2002 [Kaolishaniidae]
  • Mansuyites, Shergold 1971 [Kaolishaniidae]
  • Mansuyphyllum, Fontaine 1961 [Cyathophyllidae]
  • Manta, Bancroft 1829 [Myliobatidae]
  • Mantelliana, Anderson 1966 [Cyprideaidae]
  • Mantelliceras, Hyatt 1903 [Acanthoceratidae]
  • Mantellina, Sacco 1904 [Limidae]
  • Manticoceras, Hyatt 1884 [Gephuroceratidae]
  • Manticrinus, Ausich 1986 [Monobathrida]
  • Mantikosocrinus, Strimple 1951 [Cladida]
  • Manulicula, J. Kríž 1967 [Praecardiidae]
  • Manupecten [Pectinidae]
  • Manzanella, Girty 1909 [Manzanellidae]
  • Manzonella [Cheilostomata]
  • Manzonia, Brusina 1870 [Rissoellidae]
  • Maoricardium [Cardiida]
  • Maoricolpus, Finlay 1926 [Turritellidae]
  • Maoricrypta, Finlay 1926 [Calyptraeidae]
  • Maoricrypta (Zeacrypta), Finlay 1926 [Calyptraeidae]
  • Maorimactra, Finlay 1928 [Mactridae]
  • Maorimonotis [Pterioida]
  • Maoriscaphander, Dell 1950 [Cephalaspida]
  • Maoristrophia [Amphistrophiidae]
  • Maorites, Marshall 1926 [Kossmaticeratidae]
  • Maorithyas, Fleming 1950 [Lucinidae]
  • Maoritomella, Powell 1942 [Turridae]
  • Maorivetia, Finlay 1924 [Cancellariidae]
  • Maotunia, Zhang and Jell 1987 [Ptychopariida]
  • Mapania, Resser and Endo 1935 [Mapaniidae]
  • Mapanopsis, Chang 1963 [Asaphida]
  • Maquoketocrinus, Slocom and Foerste 1924 [Diplobathrida]
  • Maragnicrinus, Whitfield 1905 [Cladida]
  • Marama, Marwick 1927 [Veneridae]
  • Marama (Hina), J.A. Marwick 1927 [Veneridae]
  • Marathonocrinus, Moore and Plummer 1940 [Cladida]
  • Maratia, Kay 1940 [Bolliidae]
  • Marbodeia, Chelot 1887 [Acmaeidae]
  • Marcharella [Finkelnburgiidae]
  • Marchia, Jousseaume 1880 [Muricidae]
  • Marcia, H. Adams and A. A 1857 [Veneridae]
  • Marckgrafia, Weiler 1935 [Sclerorhynchidae]
  • Marcusodictyon [Problematica]
  • Marcusodictyon [Ctenostomata]
  • Marcusopora [Ctenostomata]
  • Mareda, Kobayashi 1942 [Saukiidae]
  • Marekolithus, F. C. Shaw 1995 [Trinucleidae]
  • Maretia, Gray 1855 [Spatangidae]
  • Margachitina [Rhizopodea]
  • Margarastraea, Frech 1896 [Montlivaltiidae]
  • Margarella [Trochidae]
  • Margaretta [Margarettidae]
  • Margaritaria [Pholadomyacidae]
  • Margaritella [Neotaenioglossa]
  • Margarites, Gray 1847 [Trochidae]
  • Margaritiproductus [Productidae]
  • Margaritropites, C. Diener 1916 [Tropitidae]
  • Margarobairdia, Kristan-Tollmann 1978 [Bairdiidae]
  • Margarophyllia, Volz 1896 [Margarophylliidae]
  • Margarosmilia, Volz 1896 [Margarophylliidae]
  • Marginara [Foraminifera]
  • Marginaria, Röemer 1841 [Calloporidae]
  • Marginatia [Productidae]
  • Marginella, Lamarck 1799 [Marginellidae]
  • Marginella (Volvarina), Hinds 1844 [Marginellidae]
  • Margineulima [Neotaenioglossa]
  • Marginia [Palaeocopida]
  • Marginicinctus [Productidae]
  • Marginirugus [Productidae]
  • Marginisulcus [Palaeocopida]
  • Marginohealdia [Healdiidae]
  • Marginopora [Soritidae]
  • Marginoproductus [Productidae]
  • Marginorthis [Whittardiidae]
  • Marginospongia [Demospongea]
  • Marginotimorites [Ostracoda]
  • Marginotruncana [Globotruncanidae]
  • Marginulina, d'Orbigny 1826 [Nodosariidae]
  • Marginulinita [Ichthyolariidae]
  • Marginulinopsis [Nodosariidae]
  • Margniohealdia [Metacopida]
  • Margocrinus [Isocrinida]
  • Margoplanitia [Podocopida]
  • Margostrea, Vialov 1936 [Ostreidae]
  • Marhoumacrinus, Prokop and Petr 1987 [Monobathrida]
  • Mariafusus, Petuch 1988 [Fasciolariidae]
  • Mariania [Brissidae]
  • Mariannaella, Sapelnikov and Rukavischnikova 1975 [Virgianidae]
  • Marianoceras, Librovitch 1962 [Reticuloceratidae]
  • Marieita [Foraminifera]
  • Mariella, Nowak 1916 [Turrilitidae]
  • Marimoum, Funakawa 1994 [Lophophaenidae]
  • Marinauris [Archaeogastropoda]
  • Marinduqueia [Verticillitida]
  • Marionites [Heterorthidae]
  • Mariothia [Archaeogastropoda]
  • Mariottia [Gastropoda]
  • Marisastrum, Rozkowska 1965 [Disphyllidae]
  • Maritimella, Repina and Okuneva 1969 [Naraoiida]
  • Maritimithyris [Postepithyrididae]
  • Mariusilites, Mironova 1974 [Favositidae]
  • Marjumia, Walcott 1916 [Marjumiidae]
  • Marjumicystis [Eocrinoidea]
  • Markitoechia [Uncinulidae]
  • Marklandella [Platyorthidae]
  • Markocyathus [Archaeocyathida]
  • Marlenites [Eunicemorpha]
  • Marmarostoma, Swainson 1829 [Turbinidae]
  • Marosichthys, Whitely 1951 [Tetraodontiformes]
  • Marphysaites [Eunicemorpha]
  • Marquetta [Cheilostomata]
  • Marquezina [Palaeocopida]
  • Marracanthus, St. John and Worthen 1875 [Chimaeriformes]
  • Marrella, Walcott 1912 [Arthropoda]
  • Marrelomorpha, class [Arthropoda]
  • Marrolithoides, Williams 1948 [Trinucleidae]
  • Marrolithus, Bancroft 1929 [Trinucleidae]
  • Marsaisia, Hupé 1953 [Saukiandidae]
  • Marsdenius, Wellburn 1902 [Climatiiformes]
  • Marshallaria, Finlay and Marwick 1937 [Turridae]
  • Marshallena, Allan 1926 [Turridae]
  • Marshallia, Zittel 1877 [Callodictyonidae]
  • Marshallites, Matsumoto 1955 [Kossmaticeratidae]
  • Marsipella [Rhabdamminidae]
  • Marslatourella [Podocopida]
  • Marssonella [Valvulinidae]
  • Marssoniella [Cyclostomata]
  • Marssonopora [Cheilostomata]
  • Marsupiocrinus, Morris 1843 [Monobathrida]
  • Marsupites [Uintacrinida]
  • Martesia, G. B. Sowerby 1824 [Pholadidae]
  • Marticia [Neotaenioglossa]
  • Martiguesia [Foraminifera]
  • Martinechinus [Temnopleuridae]
  • Martinezicancer [Decapoda]
  • Martinia, M'Coy 1844 [Martiniidae]
  • Martinichthys [Crossognathiformes]
  • Martinicythere [Podocopida]
  • Martiniella [Martiniidae]
  • Martinocarcinus, Bohm 1922 [Martinocarcinidae]
  • Martinophyllum, Jell and Pedder 1969 [Disphyllidae]
  • Martinothyris [Elythidae]
  • Martinottiella [Valvulinidae]
  • Martinssonia [Arthropoda]
  • Martinssonopsis [Palaeocopida]
  • Martinssonozona [Palaeocopida]
  • Martolites, C. Diener 1916 [Episculitidae]
  • Marwickara [Neogastropoda]
  • Marwickia, Finlay 1927 [Veneridae]
  • Maryonychia, J. Pojeta 1966 [Ambonychiidae]
  • Maryvillia, Walcott 1916 [Kingstoniidae]
  • Mascarananda [Decapoda]
  • Mashania [Medusae]
  • Masiaposites [Hourcquiinae]
  • Maslinella [Foraminifera]
  • Masloviella [Palaeocopida]
  • Masonites [Cephalopoda]
  • Massilina, Schlumberger 1893 [Hauerinidae]
  • Massyla, H. Adams and A. Adams 1854 [Cancellariidae]
  • Mastigobolbina, Ulrich and Bassler 1923 [Zygobolbidae]
  • Mastigocrinus, Bather 1892 [Botryocrinidae]
  • Mastigograptus [Graptolithina]
  • Mastigophora [Teuthida]
  • Mastigophora [Cheilostomata]
  • Mastigophorella [Escharinidae]
  • Mastoblastus, Yu. A. Arendt et al. 1969 [Fissiculata]
  • Mastoceras [Protactinocerida]
  • Mastodictya [Reticulosa]
  • Mastodictyum [Hexactinosa]
  • Mastophorus [Demospongea]
  • Mastophyma [Demospongea]
  • Mastopora, Sokolov 1952 [Auloporidae]
  • Mastosia [Demospongea]
  • Mastygocercus, Beaufort 1925 [Anguilliformes]
  • Matania, Rasetti 1946 [Catillicephalidae]
  • Mataninella [Trilobita]
  • Matanzia [Foraminifera]
  • Matarchia, Boghachev 1942 [Perciformes]
  • Mataxa, B. Wade 1916 [Cancellariidae]
  • Maternella [Myodocopida]
  • Maternoceras, Clausen 1969 [Gephuroceratidae]
  • Matheria, Billings 1858 [Cyrtodontidae]
  • Matheria [Cardiida]
  • Mathericrinus, Webster 1981 [Cladida]
  • Matherocladia [Fenestrata]
  • Matheronia [Requieniidae]
  • Matheropora [Fenestrata]
  • Mathilda, Semper 1865 [Mathildidae]
  • Mathoceras, Casey 1963 [Deshayesitidae]
  • Mathoceratites [Cephalopoda]
  • Mathurifusus [Neotaenioglossa]
  • Matronella [Podocopida]
  • Matsumotoa, Okada 1958 [Arcidae]
  • Matsutrypa [Cryptostomata]
  • Mattajacyathus [Ajacicyathida]
  • Matthewcyathus [Porifera]
  • Mattsechinus [Echinoneoida]
  • Matuta, Weber 1795 [Matutidae]
  • Matutella, Cooper 1951 [Matutellidae]
  • Matutites, W. C. Blow and R. B. Manning 1996 [Aethridae]
  • Maudrillia [Neogastropoda]
  • Mauispirifer [Acrospiriferidae]
  • Mauithoe, Finlay 1930 [Volutidae]
  • Maulisia, Parr 1960 [Osmeriformes]
  • Maurea [Archaeogastropoda]
  • Maurenia, Le Maître 1957 [Cleistoporidae]
  • Mauria [Neogastropoda]
  • Mauricia [Mytilidae]
  • Mauritanaster [Brissidae]
  • Mauritsina [Podocopida]
  • Maurolicus, Cocco 1838 [Sternoptychidae]
  • Maurotarion, Alberti 1969 [Aulacopleuridae]
  • Mauryella, Ulrich and Bassler 1923 [Aechminellidae]
  • Mauryna [Neotaenioglossa]
  • Maussenetia [Neotaenioglossa]
  • Maustonia, Berg 1953 [Parabolinoididae]
  • Maxwellia, Baily 1950 [Muricidae]
  • Mayaites [Mayaitidae]
  • Mayaothyris, Sun 1987 [Terebratulida]
  • Maydenella [Parastrophinidae]
  • Mayiella, Chang 1966 [Redlichiida]
  • Maylisoria, E. V. Bykova 1961 [Lagynidae]
  • Mayncina [Mayncinidae]
  • Mayomyzon, Bardack and Zangerl 1968 [Petromyzontiformes]
  • Mazaphyllum, Crook 1955 [Holmophyllidae]
  • Mazapilites [Oppeliidae]
  • Mazodus [Psammodontiformes]
  • Mazohydra [Hydroida]
  • Mazzalina, Conrad 1860 [Fasciolariidae]
  • Mazzettia [Spatangoida]
  • Mccloudia [Foraminifera]
  • Mcewanella [Platystrophiidae]
  • Mclearnia [Pterioida]
  • Mclearnites [Amphistrophiidae]
  • Mclearnitesella [Amphistrophiidae]
  • Mcleodea, Flower and Duncan 1975 [Plasmoporellidae]
  • Mcmurdodus [Mcmurdodontidae]
  • Mcnamaraspis, Long 1995 [Arthrodira]
  • Mcqueenoceras, Ulrich and Foerste 1936 [Proterocameroceratidae]
  • Meadowtownella, Pribyl and Vanek 1965 [Odontopleuridae]
  • Meandraraea, Etallon 1859 [Haplaraeidae]
  • Meandrastrea, d'Orbigny 1849 [Montlivaltiidae]
  • Meandrina, Lamarck 1801 [Meandrinidae]
  • Meandripetra [Tabulospongida]
  • Meandroloculina [Nubeculariidae]
  • Meandrophyllia, d'Orbigny 1849 [Haplaraeidae]
  • Meandropora [Cyclostomata]
  • Meandropsina [Meandropsinidae]
  • Meandroria, Alloiteau 1952 [Faviidae]
  • Meandrosmilia, Alloiteau 1952 [Meandrinidae]
  • Meandrospira [Cornuspiridae]
  • Meandrospiranella [Cornuspiridae]
  • Meandrospongia [Lychniscosa]
  • Meandrostia [Maeandrostiidae]
  • Meandrovolzeia, Cuif 1976 [Volzeiidae]
  • Mecloudius [Anthozoa]
  • Mecochiria [Decapoda]
  • Mecochirus, Germar 1827 [Mecochiridae]
  • Mecoliotia, Hedley 1899 [Pickworthiidae]
  • Mecophrys, Shergold 1982 [Trilobita]
  • Mecynoceras, Foerste 1926 [Poterioceratidae]
  • Mecynodon [Cardiida]
  • Mecynoecia [Cyclostomata]
  • Medaeus, J. D. Dana 1851 [Xanthidae]
  • Medeela [Radiolitidae]
  • Medessia [Anomalorthidae]
  • Medianella [Palaeocopida]
  • Mediapora [Nikiforovellidae]
  • Mediargo, Terry 1968 [Ranellidae]
  • Medinophyllum, Sytova 1966 [Entelophyllidae]
  • Mediocytherideis [Podocopida]
  • Medionapus [Neogastropoda]
  • Mediopsis [Foraminifera]
  • Mediospirifer [Spinocyrtiidae]
  • Medipsia [Foraminifera]
  • Mediraon, Vokes 1946 [Crassatellidae]
  • Medisemicoscinium [Fenestrata]
  • Mediterraneotrigonia [Trigoniida]
  • Mediterranirhynchia [Cyclothyrididae]
  • Medlicottia, Waagen 1880 [Medlicottiidae]
  • Medocechinus [Temnopleuroida]
  • Medocia [Foraminifera]
  • Medoriopsis [Neotaenioglossa]
  • Medusae, class [Cnidaria]
  • Medusaephyllum, Roemer 1855 [Phillipsastreidae]
  • Medusinites, R. C. Sprigg 1949 [Cyclozoa]
  • Medusytes [Medusae]
  • Meekella [Meekellidae]
  • Meekia, Gabb 1864 [Tancrediidae]
  • Meekoceras, A. Hyatt 1879 [Prionitidae]
  • Meekopora [Hexagonellidae]
  • Meekoporella [Hexagonellidae]
  • Meeria, Frederickson 1949 [Asaphida]
  • Megabalanus, Hoek 1913 [Balanidae]
  • Megacanthopora [Rhabdomesidae]
  • Megacardita, Sacco 1899 [Carditidae]
  • Megachonetes [Rugosochonetidae]
  • Megacidaris [Cidaridae]
  • Megacrenella, Habe and Ito 1965 [Crenellidae]
  • Megacucullaea, Rennie 1936 [Cucullaeidae]
  • Megaderaion [Enteropneusta]
  • Megadiceras [Hippuritida]
  • Megadisocosorus, Foerste 1925 [Armenoceratidae]
  • Megadunderbergia, Kobayashi 1938 [Ptychopariida]
  • Megagraulos, Kobayashi 1935 [Wuaniidae]
  • Megagrypha [Bivalvia]
  • Megalaspidella, Kobayashi 1937 [Asaphidae]
  • Megalaspides, Brögger 1886 [Asaphidae]
  • Megalaspidicus, Petrunina 1984 [Trilobita]
  • Megalaspis, Angelin 1851 [Asaphidae]
  • Megalatractus [Neogastropoda]
  • Megalelasma [Porifera]
  • Megaliocrinus, Moore and Laudon 1942 [Paragaricocrinidae]
  • Megalisania, Qiu 1983 [Corynexochida]
  • Megalocardia [Cardiida]
  • Megaloceras [Oncocerida]
  • Megalocypraea, Schilder 1927 [Cypraeidae]
  • Megalograptus [Eurypterida]
  • Megalomoidea [Hippuritida]
  • Megalomphalus, Brusina 1871 [Vanikoridae]
  • Megalonoda [Archaeogastropoda]
  • Megalopiformes, order [Osteichthyes]
  • Megaloplax, Obrutschev 1933 [Arthrodira]
  • Megalops, Lacpde 1803 [Elopidae]
  • Megalopsis, Qian 1983 [Ptychopariida]
  • Megalopterorhynchus [Petasmariidae]
  • Megalytoceras [Phylloceratidae]
  • Megambonia, Hall 1859 [Modiomorphidae]
  • Megamyonia, Y. Wang 1949 [Rafinesquinidae]
  • Megangulus, Afshar 1969 [Tellinidae]
  • Meganterella [Meganterididae]
  • Meganteris [Meganterididae]
  • Megapalaeolenus, Chang 1966 [Palaeolenidae]
  • Megapetalus [Asterostomatidae]
  • Megaphyllites, E. v. Mojsisovics 1879 [Megaphyllitidae]
  • Megapitaria, Grant and Gale 1931 [Veneridae]
  • Megaplectatrypa [Karpinskiidae]
  • Megapleuronia [Isogrammidae]
  • Megapneustes [Brissidae]
  • Megapomus [Coelacanthiformes]
  • Megapraeconia, Chavan 1952 [Astartidae]
  • Megapronorites, Ruzhencev 1949 [Pronoritidae]
  • Megarhiza, Schrammen 1901 [Megarhizidae]
  • Megasalopina [Draboviidae]
  • Megascyliorhinus, Cappetta and Ward 1977 [Parascylliidae]
  • Megasphaera [Problematica]
  • Megasphaeroceras [Cephalopoda]
  • Megaspinochonetes [Strophochonetidae]
  • Megasqualus, Herman 1982 [Squalidae]
  • Megastomella [Foraminifera]
  • Megastomia [Heterostrophia]
  • Megastroma [Axinellida]
  • Megastrophia [Strophodontidae]
  • Megastrophiella [Douvillinidae]
  • Megastylia [Reticulosa]
  • Megasurcula [Neogastropoda]
  • Megatebennus, Pilsbry 1890 [Fissurellidae]
  • Megateuthis [Belemnitida]
  • Megathura, Pilsbry 1890 [Fissurellidae]
  • Megatrigonia [Trigoniida]
  • Megatyloceras [Cephalopoda]
  • Megaxinus, Brugnone 1880 [Lucinidae]
  • Megayoldia, Verrill and Bush 1897 [Sareptidae]
  • Megerlina, Deslongchamps 1884 [Kraussinidae]
  • Meghystrichosphaeridium [Problematica]
  • Meginoceras, F. H. McLearn 1930 [Trachyceratidae]
  • Megistaspis, Jaanusson 1956 [Asaphidae]
  • Megistocrinus, D. D. Owen and B. F. Shumard 1852 [Batocrinidae]
  • Megistolepis [Coelacanthiformes]
  • Megistostoma, Gabb 1864 [Cephalaspida]
  • Megommatocythere [Podocopida]
  • Megousia, Muir-Wood and Cooper 1960 [Linoproductidae]
  • Megumatrypa [Atrypidae]
  • Mehesella [Podocopida]
  • Mehlina, Youngquist 1945 [Polygnathidae]
  • Meidamonella [Foraminifera]
  • Meidiichthys, Brough 1931 [Perleididae]
  • Meifodia [Lissatrypidae]
  • Meikeloceras [Ellesmerocerida]
  • Meiocardia, H. Adams and A. A 1857 [Glossidae]
  • Meioceras, Carpenter 1858 [Caecidae]
  • Meisenia [Cardiida]
  • Meishucunella, Jiang 1982 [Archaeocopida]
  • Meisterella, Ivshin 1952 [Trilobita]
  • Meitanoceras [Actinocerida]
  • Meitanopora, Yang 1973 [Gorskyitidae]
  • Mekynophrys, Harrington 1938 [Asaphidae]
  • Melagathiceras, E. T. Tozer 1971 [Melagathiceratidae]
  • Melagraphia [Trochidae]
  • Melamphaes, Guenther 1864 [Beryciformes]
  • Melanatria, Bowdich 1822 [Pachychilidae]
  • Melanchlenia [Palaeocopida]
  • Melanella, Bowdich 1822 [Eulimidae]
  • Melanioptyxis [Heterostrophia]
  • Melanofurcata [Cnidaria]
  • Melanognathus [Dipnoi]
  • Melanogrammus, Gill 1862 [Gadidae]
  • Melanonus, Guenther 1878 [Gadiformes]
  • Melanophyllidium, Kropacheva 1966 [Kiziliidae]
  • Melanophyllum, Gorskiy 1951 [Cyathopsidae]
  • Melanoraphia [Phyllodocemorpha]
  • Melanosteus [Cnidaria]
  • Melanosteus, Lelievre and Goujet 1987 [Selenosteidae]
  • Melanostrophus [Stolonoidea]
  • Melanostylus [Cnidaria]
  • Melapium, H. Adams and A. A 1853 [Strepturidae]
  • Melathrokerion [Foraminifera]
  • Melatolla [Foraminifera]
  • Melatoma [Neogastropoda]
  • Melaxinaea, Iredale 1930 [Glycymerididae]
  • Melbacrinus, Strimple 1939 [Bridgerocrinidae]
  • Melchiorites, Spath 1923 [Desmoceratidae]
  • Meleagrinella, Whitfield 1855 [Oxytomidae]
  • Melicerita [Cyclostomata]
  • Melicerita [Cheilostomata]
  • Meliceritella [Cyclostomata]
  • Meliceritites [Cheilostomata]
  • Melita, Leach 1814 [Amphipoda]
  • Melithaea [Gorgonacea]
  • Melittosphaera [Spumellaria]
  • Melkanicyathus [Monocyathida]
  • Mellarium [Archaeogastropoda]
  • Mellita, Agassiz 1841 [Mellitidae]
  • Melliteryx, Iredale 1924 [Erycinidae]
  • Meloceras [Oncocerida]
  • Melocrinites, G.A. Goldfuss 1831 [Monobathrida]
  • Melonanchora [Poecilosclerida]
  • Melonechinus [Palaechinidae]
  • Melonella, Zittel 1878 [Cylindrophymatidae]
  • Melongena, Schumacher 1817 [Melongenidae]
  • Melongena (Heligmotoma), Mayer-Eymar 1895 [Galeodidae]
  • Melonis, Monfort 1808 [Nonionidae]
  • Melonites, Bogoslovsky 1971 [Prolobitidae]
  • Melopetasus [Problematica]
  • Melosia, Dall 1915 [Veneridae]
  • Melrosia, Wright 1966 [Stringophyllidae]
  • Melvilloceras, Nassichuk 1975 [Reticuloceratidae]
  • Membranacyathus [Ajacicyathida]
  • Membranipora, Blainville 1834 [Electrinidae]
  • Membraniporella [Cribrilinidae]
  • Membraniporidra, Canu and Bassler 1917 [Calloporidae]
  • Membraniporina [Electrinidae]
  • Membrendoecium [Antroporidae]
  • Memoria [Podocopida]
  • Menabites, Collignon 1948 [Collignoniceratidae]
  • Menabonites [Pachydiscidae]
  • Menaspacanthus, Patterson 1965 [Chondrichthyes]
  • Mendacella, Cooper 1930 [Rhipidomellidae]
  • Mendathyris [Meganterididae]
  • Mendolaspis, Rusconi 1951 [Raphiophoridae]
  • Mendosina, Shergold 1975 [Remopleurididae]
  • Mendospidella, Rusconi 1952 [Corynexochida]
  • Mene, Lacpde 1803 [Menidae]
  • Meneghinella, Boernemann 1891 [Trilobita]
  • Meneghiniceras [Juraphyllitidae]
  • Menestho, Möller 1842 [Pyramidellidae]
  • Meneviella, Stubblefield 1951 [Holocephalinidae]
  • Menidia, Bonaparte 1836 [Atheriniformes]
  • Menippe, De Haan 1833 [Oziidae]
  • Meniscoceras, Flower 1941 [Proterocameroceratidae]
  • Meniscocorphye [Ptychopariida]
  • Meniscophyllum, Simpson 1900 [Hapsiphyllidae]
  • Meniscopora [Cheilostomata]
  • Meniscuchus, Opik 1975 [Agnostida]
  • Menneraspis, Pokrovskaya 1959 [Menneraspidae]
  • Mennerella [Beyrichiopsidae]
  • Mennericyathus [Ajacicyathida]
  • Menneroctenia [Nuculida]
  • Mennespirifer [Cyrtospiriferidae]
  • Menniscocrinus [Cladida]
  • Menocephalites, Kobayashi 1935 [Ptychopariida]
  • Menocidaris [Cidaroida]
  • Menoeidina [Metacopida]
  • Menomonia, Walcott 1916 [Menomoniidae]
  • Menophyllum, Milne-Edwards and Haime 1850 [Cyathopsidae]
  • Menthafonia [Neotaenioglossa]
  • Menticirrhus, Gill 1861 [Perciformes]
  • Mentzelia [Spiriferinidae]
  • Mentzeliopsis [Sinucostidae]
  • Menuites, Spath 1922 [Pachydiscidae]
  • Menuthiaster [Holasteroida]
  • Menuthionautlis, Collignon 1933 [Grypoceratidae]
  • Meoma, Gray 1851 [Brissidae]
  • Meonia [Chlidonophoridae]
  • Meotolima, Oyama 1943 [Limidae]
  • Mephiarges [Lichidae]
  • Merabatis, Cappetta 1983 [Myliobatiformes]
  • Mercaticeras [Hildoceratidae]
  • Mercenaria, Schumacher 1817 [Veneridae]
  • Merciella [Leptellinidae]
  • Mercierella, Fauvel 1923 [Serpulidae]
  • Mercimonia, Dall 1902 [Veneridae]
  • Merebolina, Gandl 1980 [Proetida]
  • Merelina, Iredale 1915 [Rissoidae]
  • Meretrissa [Cardiida]
  • Meretrix, Lamarck 1799 [Veneridae]
  • Mericella [Neogastropoda]
  • Mericoceras [Orthocerida]
  • Merignacia [Cardiida]
  • Meringaspis, Opik 1967 [Damesellidae]
  • Meringosoma [Amphinomorpha]
  • Merismopteria [Pterioida]
  • Merista [Meristidae]
  • Meristella [Meristellidae]
  • Meristelloides [Meristellidae]
  • Meristina [Meristellidae]
  • Meristocrinus, Springer 1909 [Sagenocrinitidae]
  • Meristorygma [Brachythyrididae]
  • Meristoschisma [Parablastoidea]
  • Meristosomo [Arthropoda]
  • Meristospira [Athyrididae]
  • Merklinia, Sobetski 1960 [Pectinidae]
  • Merklinicardium [Cardiida]
  • Merlangius, Geoffroy 1767 [Osteichthyes]
  • Merlewoodia, Pickett 1967 [Aphrophyllidae]
  • Merlia [Tabulospongida]
  • Merlingina [Foraminifera]
  • Merlinia, Fortey and Owens 1987 [Asaphidae]
  • Merluccius, Rafinesque 1810 [Merlucciidae]
  • Merocanites, Schindewolf 1922 [Prolecanitidae]
  • Merocidaris [Psychocidaridae]
  • Merocrinus, Walcott 1884 [Cladida]
  • Merocythere [Podocopida]
  • Meroena, Jukes-Brown 1908 [Veneridae]
  • Meropalla, Opik 1967 [Leiostegiidae]
  • Meroperix, Lane 1972 [Styginidae]
  • Merospirifer [Martiniidae]
  • Merostomata, class, Dana 1852 [Chelicerata]
  • Merostomoidea, class [Arthropoda]
  • Merriamaster [Dendrasteridae]
  • Merriamia, Boulanger 1904 [Toretocnemidae]
  • Merrillina [Conodontophorida]
  • Merulina, Ehrenberg 1834 [Merulinidae]
  • Mesaktoceras [Actinocerida]
  • Mesalia, Gray 1847 [Turritellidae]
  • Mesammina [Hemisphaeramminidae]
  • Meschedea [Spumellaria]
  • Mesenteripora, de Blainville 1830 [Entalophoridae]
  • Mesetaia, Hupe 1953 [Ptychopariida]
  • Mesiteia, Gorjanovic-Kramberger 1885 [Orectolobiformes]
  • Mesnaquaceras, Flower 1955 [Proteoceratidae]
  • Mesobeloceras, Glenister 1958 [Beloceratidae]
  • Mesoblastus, R. Etheridge and P. H. Carpenter 1886 [Granatocrinidae]
  • Mesocallista, Cox 1952 [Veneridae]
  • Mesoceras, Barrande 1877 [Mesoceratidae]
  • Mesochasmoceras, Foord 1900 [Trigonoceratidae]
  • Mesochilotoma [Neogastropoda]
  • Mesochione [Cardiida]
  • Mesochiton [Neoloricata]
  • Mesocladiscites, A. A. Shevyrev 1968 [Cladiscitidae]
  • Mesoclupea [Ichthyodectiformes]
  • Mesoclymenia, Bogoslovsky 1981 [Gonioclymeniidae]
  • Mesoconularia [Scyphozoa]
  • Mesocrania, Smirnova 1997 [Craniidae]
  • Mesocystis [Diploporita]
  • Mesodentalina [Ichthyolariidae]
  • Mesodesma, Deshayes [Mesodesmatidae]
  • Mesodiadema [Cidaroida]
  • Mesodiadema [Diadematidae]
  • Mesodiceras [Hippuritida]
  • Mesodmodus [Hybodontiformes]
  • Mesodouvillina [Amphistrophiidae]
  • Mesodromilites, Woodward 1900 [Decapoda]
  • Mesoendothyra, Dain 1958 [Mesoendothyridae]
  • Mesofavosites, Sokolov 1951 [Favositidae]
  • Mesogalathea, Housa 1963 [Galatheidae]
  • Mesogaudryceras, Spath 1927 [Gaudryceratidae]
  • Mesogena [Archaeogastropoda]
  • Mesoglauconia [Neotaenioglossa]
  • Mesohalina, Wittibschlager 1983 [Potamididae]
  • Mesohibolites [Belemnitida]
  • Mesokylix [Hydroida]
  • Mesolasma [Cirripedia]
  • Mesolenellus, Palmer and Repina 1993 [Olenellida]
  • Mesolepis, Young 1866 [Actinopterygii]
  • Mesoleptostrophia, Harper and Boucot 1978 [Leptostrophiidae]
  • Mesolimulus [Xiphosurida]
  • Mesolinga, Chavan 1951 [Lucinidae]
  • Mesolissostrophia [Eopholidostrophiidae]
  • Mesolites, Mironova 1969 [Favositidae]
  • Mesolophodus [Chondrichthyes]
  • Mesomiltha, Chavan 1938 [Lucinidae]
  • Mesomorpha, Pratz 1883 [Curtoseriidae]
  • Mesomphalus, Ulrich and Bassler 1913 [Beyrichiidae]
  • Mesonacis, Walcott 1885 [Olenellida]
  • Mesonea [Cyclostomata]
  • Mesoneilo, Vu-khuc 1977 [Ctenodontidae]
  • Mesoneritina, Yen 1946 [Neritidae]
  • Mesonomia, Ulrich and Cooper 1936 [Huenellidae]
  • Mesonopora [Diaperoeciidae]
  • Mesopeplum, Iredale 1929 [Pectinidae]
  • Mesopholidostrophia [Eopholidostrophiidae]
  • Mesophyllum, Schlter 1889 [Digonophyllidae]
  • Mesophyllum (Cystiphylloides), Chapman 1893 [Cystiphyllidae]
  • Mesophyllum (Dialytophyllum), Amanshauser 1925 [Digonophyllidae]
  • Mesophyllum (Hemicosmophyllum), Wedekind and Vollbrecht 1931 [Digonophyllidae]
  • Mesophyllum (Lekanophyllum), Wedekind 1923 [Digonophyllidae]
  • Mesophyllum (Zonodigonophyllum), Vollbrecht 1926 [Digonophyllidae]
  • Mesopleura [Solecurtidae]
  • Mesoplica [Productidae]
  • Mesopuzosia, Matsumoto 1954 [Desmoceratidae]
  • Mesorbitolina [Orbitolinidae]
  • Mesorhoea, Stimpson 1871 [Parthenopidae]
  • Mesorhytis [Mitridae]
  • Mesosaccella, Chavan 1946 [Nuculanidae]
  • Mesosaurus, Gervais 1865 [Mesosauridae]
  • Mesoscalpellum [Cirripedia]
  • Mesoschubertella, Kanuma and Sakagami 1957 [Schubertellidae]
  • Mesosimoceras [Simoceratidae]
  • Mesosolenia, Mironova 1960 [Multisoleniidae]
  • Mesospira [Neotaenioglossa]
  • Mesostomaria [Cheilostomata]
  • Mesotaxis [Palmatolepidae]
  • Mesoteuthis [Belemnitida]
  • Mesotreta [Siphonotretidae]
  • Mesotrigonia [Trigoniida]
  • Mesotrochactaeon, Akopyan 1972 [Cephalaspida]
  • Mesotrypa [Trepostomida]
  • Mesotrypina [Trepostomida]
  • Mesoturrilites [Cephalopoda]
  • Mesovallupus, Pessagno and MacLeod 1987 [Pantanelliidae]
  • Mesovalvata [Neotaenioglossa]
  • Mespilocrinus [Sagenocrinida]
  • Mespilocystites [Coronata]
  • Messaoudia [Holasteridae]
  • Messinella [Podocopida]
  • Mestognathus, Bischoff [Conodontophorida]
  • Mesturus [Mesturidae]
  • Metabelemnites [Aulacocerida]
  • Metablastus, R. Etheridge and P. H. Carpenter 1886 [Spiraculata]
  • Metabolipa, Godefroid 1974 [Gypidulidae]
  • Metabolocrinus, Jaekel 1902 [Cladida]
  • Metabowmania, Kobayashi 1955 [Hystricuridae]
  • Metabrograptus [Graptoloidea]
  • Metacalymene, Kegel 1927 [Calymenidae]
  • Metacamarella [Parallelelasmatidae]
  • Metacanites, Schindewolf 1922 [Prolecanitidae]
  • Metacanthina, Pillet 1954 [Acastidae]
  • Metacarnites, C. Diener 1908 [Tibetitidae]
  • Metacatillocrinus, Moore and Strimple 1942 [Crinoidea]
  • Metacerithium, Cossmann 1906 [Metacerithiidae]
  • Metaclimacograptus, Bulman and Rickards 1968 [Normalograptidae]
  • Metacoceras, Hyatt 1883 [Tainoceratidae]
  • Metaconularia [Scyphozoa]
  • Metaconulus [Archaeogastropoda]
  • Metacopida, order, Sylvester-Bradley 1961 [Ostracoda]
  • Metacrinus, Carpenter 1882 [Isocrinidae]
  • Metacrocrinus, Moore and Strimple 1969 [Monobathrida]
  • Metacromyocrinus, Strimple 1961 [Cromyocrinidae]
  • Metacryphaeus, Reed 1907 [Calmoniidae]
  • Metactinoceras [Actinocerida]
  • Metacymbites [Cymbitidae]
  • Metacypris, Brady and Robertson 1870 [Limnocytheridae]
  • Metacytheropteron [Cytheruridae]
  • Metadagnoceras, E. T. Tozer 1965 [Khvalynitidae]
  • Metaderoceras, Spath 1925 [Eoderoceratidae]
  • Metadictya [Rhinidictyidae]
  • Metadimorphoceras, Moore 1958 [Dimorphoceratidae]
  • Metadinarites, L. F. Spath 1951 [Aplococeratidae]
  • Metadoliolina [Verbeekinidae]
  • Metadoxides, Bornemann 1891 [Redlichiida]
  • Metaeutelecrinus, Frest and Strimple 1980 [Monobathrida]
  • Metaffinocrinus, Knapp 1969 [Cladida]
  • Metagraulos, Kobayashi 1935 [Agraulidae]
  • Metagravesia [Cephalopoda]
  • Metahamites [Cephalopoda]
  • Metahaploceras [Oppeliidae]
  • Metaharpes, Lamont 1948 [Ptychopariida]
  • Metahedenstroemia, L. F. Spath 1934 [Noritidae]
  • Metahoplites [Cephalopoda]
  • Metakootenia, Qiu 1983 [Corynexochida]
  • Metalaeospira [Serpulimorpha]
  • Metaldetes [Archaeocyathida]
  • Metalegoceras, Schindewolf 1931 [Metalegoceratidae]
  • Metaleiolichas, Kobayashi and Hamada 1987 [Lichida]
  • Metalisania, Ju 1983 [Lisaniidae]
  • Metalytoceras, Spath 1927 [Lytoceratidae]
  • Metamelon, J.A. Marwick 1926 [Volutidae]
  • Metamsassia [Tabulospongida]
  • Metanephrops, R. Jenkins 1972 [Nephropidae]
  • Metanomocare, Lermontova 1940 [Anomocaridae]
  • Metanothosaurus, Yabe and Shikana 1948 [Nothosauridae]
  • Metapadia [Arcida]
  • Metapatoceras [Cephalopoda]
  • Metapeltoceras [Cephalopoda]
  • Metaperimestocrinus, Strimple 1961 [Pirasocrinidae]
  • Metaphragmoceras, Flower 1938 [Nothoceratidae]
  • Metapilekia, Harrington 1938 [Pilekiidae]
  • Metaplacenticeras, Spath 1926 [Placenticeratidae]
  • Metaplasia [Ambocoeliidae]
  • Metapliomerops, Kobayashi 1934 [Phacopida]
  • Metapolymorphina [Foraminifera]
  • Metaporinus [Disasteridae]
  • Metaprioniodus [Conodontophorida]
  • Metapronorites, Librovitch 1938 [Pronoritidae]
  • Metaptychoceras [Cephalopoda]
  • Metaredlichia, Lu 1950 [Redlichiidae]
  • Metarizoceras, Foerste 1930 [Oncoceratidae]
  • Metarmenoceras, Flower 1940 [Ormoceratidae]
  • Metarnioceras [Arietitidae]
  • Metascutellum, Snajdr 1960 [Styginidae]
  • Metasibirites, E. Mojsisovics 1896 [Metasibiritidae]
  • Metasigaloceras, Hyatt 1903 [Acanthoceratidae]
  • Metaspyroceras, A. A. Foerste 1932 [Dawsonoceratidae]
  • Metasterocystis [Diploporita]
  • Metastromatoceras, Zhuravleva 1957 [Pseudorthoceratidae]
  • Metastyliolina, Boucek and Prantl 1961 [Striatostyliolinidae]
  • Metasycocrinus [Cladida]
  • Metathyrisina [Retziellidae]
  • Metatibetites, Zhao and Wang 1976 [Tibetitidae]
  • Metatissotia [Tissotiidae]
  • Metavermilia [Serpulimorpha]
  • Metaxia, Monterosato 1884 [Triphoridae]
  • Metayuepingia, Liu 1977 [Asaphida]
  • Metelipora [Crustoporidae]
  • Meteoraspis, Resser 1935 [Tricrepicephalidae]
  • Metephippiorthoceras, Zhuravleva 1957 [Proteoceratidae]
  • Methabocrinus, Jaekel 1918 [Monobathrida]
  • Metholectypus, Hawkins 1923 [Holectypidae]
  • Metichthyocrinus [Sagenocrinida]
  • Metinyoites, L. F. Spath 1930 [Inyoitidae]
  • Metisaspina [Ptychopariida]
  • Metisaspis, Rasetti 1946 [Ptychopariida]
  • Metoicoceras, Hyatt 1903 [Acanthoceratidae]
  • Metopacanthus, Zittel 1887 [Myriacanthidae]
  • Metopolichas, Guerich 1901 [Lichidae]
  • Metopotropis, Opik 1967 [Monkaspididae]
  • Metorthis [Plaesiomyidae]
  • Metoxynoticeras [Oxynoticeratidae]
  • Metracolposa [Cribrilinidae]
  • Metrarabdotos [Metrarabdotosidae]
  • Metrioceras [Discosorida]
  • Metriomphalus, Cossmann 1916 [Nododelphinulidae]
  • Metrionaxon, Glinski 1963 [Laccophyllidae]
  • Metriophyllum, Milne-Edwards and Haime 1850 [Metriophyllidae]
  • Metrioplexus, Glinski 1963 [Metriophyllidae]
  • Metriorhynchus, H. von Meyer 1830 [Reptilia]
  • Metrocrypta [Cheilostomata]
  • Metrolytoceras [Cephalopoda]
  • Metroperiella, Canu and Bassler 1917 [Cheilostomata]
  • Metschnikowia [Demospongea]
  • Metula, H. Adams and A. Adams 1853 [Buccinidae]
  • Metulella, Gabb 1873 [Columbellidae]
  • Metussuria, L. F. Spath 1934 [Ussuriidae]
  • Metutharocrinus, Moore and Strimple 1973 [Pirasocrinidae]
  • Metyacyathellus [Archaeocyathida]
  • Mexicaprina [Caprinidae]
  • Mexicaspis, Lochman 1948 [Zacanthoididae]
  • Mexicella, Lochman 1948 [Ptychopariidae]
  • Mexicoceras, Ruzhencev 1955 [Cyclolobidae]
  • Mexicotrochactaeon, Akopyan 1972 [Cephalaspida]
  • Meyendorffina, Aurouze and Bizon 1958 [Pavonitinidae]
  • Meyerella [Decapoda]
  • Meyeria, McCoy 1849 [Mecochiridae]
  • Mezocrotalus, Maksimova 1978 [Phacopida]
  • Mezounia [Aegiromenidae]
  • Mialsemia [Erniettamorpha]
  • Miamoceras, Flower 1946 [Oncoceratidae]
  • Miaohuangrhynchus [Rhynchonellida]
  • Miaopopsis, Lu 1965 [Raphiophoridae]
  • Miatschkovocrinus [Cladida]
  • Micagnostus, Khairullina 1975 [Agnostida]
  • Micantapex, Iredale 1936 [Turridae]
  • Micatheca [Exilithecida]
  • Miccocephalites [Cadoceratidae]
  • Micella [Gusarellidae]
  • Michaletia, Cossmann 1903 [Trochidae]
  • Michalskia [Cephalopoda]
  • Michaspis, Egorova and Savitsky 1968 [Ptychopariida]
  • Michela, J. A. Gardner 1945 [Turridae]
  • Michelinaraea, Alloiteau 1952 [Haplaraeidae]
  • Michelinia, de Koninck 1841 [Micheliniidae]
  • Michelinoceras, Foerste 1932 [Orthoceratidae]
  • Michelottiphyllia, Barta-Calmus 1973 [Faviidae]
  • Michiganites, Ruzhencev 1962 [Prolecanitidae]
  • Michniakia, Missarzhevsky 1966 [Helcionelloida]
  • Micidus [Meganterididae]
  • Mickwitzia, Schmidt 1888 [Paterinida]
  • Micmacca, Matthew 1895 [Chengkouiidae]
  • Micmaccopsis, Lermontova 1940 [Corynexochida]
  • Micrabacia, Milne-Edwards 1849 [Micrabaciidae]
  • Micracanthoceras [Himalayitidae]
  • Micraclathurella [Neogastropoda]
  • Micragnostus, Howell 1935 [Agnostidae]
  • Micranellium, Bartsch 1920 [Caecidae]
  • Micraseites [Tunicata]
  • Micraster, L. Agassiz 1836 [Micrasteridae]
  • Micrelenchus [Archaeogastropoda]
  • Micreschara [Neotaenioglossa]
  • Microaechmina [Palaeocopida]
  • Microancientia [Problematica]
  • Microbiplices [Cephalopoda]
  • Microblastidium, Schrammen 1902 [Callodictyonidae]
  • Microblastus, Eykeren 1942 [Phaenoschismatidae]
  • Microcallista, Stewart 1930 [Veneridae]
  • Microcampylus [Trepostomida]
  • Microcapros, Gayet 1980 [Zeiformes]
  • Microcaracrinus, Strimple and Watkins 1969 [Pachylocrinidae]
  • Microcardinalia, Boucot and Ehlers 1963 [Stricklandiidae]
  • Microcardium, Thiele 1934 [Cardiidae]
  • Microcaris [Concavicarida]
  • Microcheilinella [Pachydomellidae]
  • Microchilina [Palaeocopida]
  • Microchirus, Bonaparte 1833 [Soleidae]
  • Microchlamys, Sobetski 1977 [Pectinidae]
  • Microcirce [Cardiida]
  • Microcorax, Cappetta and Case 1975 [Lamniformes]
  • Microcoryne [Porifera]
  • Microcorystes, Fritsch 1893 [Decapoda]
  • Microcosmia [Ostracoda]
  • Microcrinus, Emmons 1858 [Comatulida]
  • Microcubus, Haeckel 1881 [Acanthodesmiidae]
  • Microcyathus, Hinde 1896 [Palaeacidae]
  • Microcyclus, Meek and Worthen 1868 [Hadrophyllidae]
  • Microcyphus [Temnopleuridae]
  • Microcyprina [Cardiida]
  • Microcythere [Podocopida]
  • Microcytherura, Muller 1894 [Cytheridae]
  • Microdactylites [Dactylioceratidae]
  • Microdactylophora [Eunicemorpha]
  • Microdendron, Schrammen 1901 [Astrocladiidae]
  • Microderoceras [Eoderoceratidae]
  • Microdiadema [Pseudodiadematidae]
  • Microdictyon, Bengston et al. 1981 [Onychophora]
  • Microdrillia, Casey 1903 [Turridae]
  • Microecia [Cyclostomata]
  • Microetmopterus, Siverson 1993 [Squaliformes]
  • Microfragum, Habe 1951 [Cardiidae]
  • Microfulgur [Neogastropoda]
  • Microfusus [Nassariidae]
  • Microgadus, Gill 1865 [Gadidae]
  • Microgaza, Dall 1881 [Trochidae]
  • Microhemidiscia, Kling and Reif 1969 [Hemidiscellidae]
  • Microlacuna [Neotaenioglossa]
  • Microlampas [Oligopygidae]
  • Microliotia, Boettger 1902 [Pickworthiidae]
  • Micromaia, Bittner 1875 [Majidae]
  • Micromeris, Conrad 1866 [Condylocardiidae]
  • Micromesistius, Gill 1863 [Gadidae]
  • Micromithrax, F. Noetling 1881 [Corystidae]
  • Micromphalina [Neotaenioglossa]
  • Micromphalites [Clydoniceratidae]
  • Micromyrus, Casier 1967 [Anguilliformes]
  • Micronectes [Pectinidae]
  • Micronoceras, Flower 1938 [Brevicoceratidae]
  • Microparaparchites [Podocopida]
  • Microparia, Hawle and Corda 1847 [Cyclopygidae]
  • Micropedina, Cotteau 1866 [Hemicidaroidea]
  • Microphyllia, d'Orbigny 1849 [Latomeandridae]
  • Micropilina [Tryblidiida]
  • Microplasma, Dybowski 1873 [Cystiphyllidae]
  • Micropneumatocythere [Podocopida]
  • Micropora [Microporidae]
  • Microporella [Microporellidae]
  • Microporina [Microporidae]
  • Micropsalis, Von Meyer 1859 [Palaemonidae]
  • Micropsis [Phymosomatidae]
  • Micropycnodon, Hibbard and Graffham 1945 [Pycnodontidae]
  • Micropylepora, Jiang 1982 [Problematica]
  • Microrhizophora [Demospongea]
  • Microrhynchia [Rhynchonellidae]
  • Microschedia [Problematica]
  • Microschiza, Gemmellaro 1876 [Pseudomelaniidae]
  • Microsciadiocapsa, Pessagno 1969 [Neosciadiocapsidae]
  • Microscutellum, Snajdr 1960 [Styginidae]
  • Microsmilia, Koby 1888 [Caryophylliidae]
  • Microsolena, Lamouroux 1821 [Microsolenidae]
  • Microsphaeridiorhynchus [Trigonirhynchiidae]
  • Microspongia, Miller and Dyer 1878 [Hindiidae]
  • Microstagon, Cossmann 1896 [Ungulinidae]
  • Microstelma [Rissoidae]
  • Microsteus, Gross 1932 [Selenosteidae]
  • Microstomus, Schinze 1822 [Pleuronectiformes]
  • Microsurcula [Neogastropoda]
  • Microtaphrus [Neotaenioglossa]
  • Microthyca [Neotaenioglossa]
  • Microtrigonia [Trigoniidae]
  • Microtropites, E. v. Mojsisovics 1893 [Tropitidae]
  • Microtrypa [Strophomenidae]
  • Microtubus [Polychaeta]
  • Microvoluta, Angas 1877 [Volutomitridae]
  • Microxestolebris [Podocopida]
  • Microzarkodina [Conodontophorida]
  • Mictocrinus, Goldring 1923 [Cladida]
  • Mictocystis, Etheridge 1908 [Endophyllidae]
  • Mictophyllum, Lang and Smith 1939 [Cyathophyllidae]
  • Mictosaukia, Shergold 1975 [Saukiidae]
  • Mictospirifer [Cyrtiidae]
  • Micula, Sytova 1952 [Expressophyllidae]
  • Miculiella, Ivanovskiy 1963 [Expressophyllidae]
  • Miehlkella [Palaeocopida]
  • Migliorinia [Brissidae]
  • Migmatophyllum, Pedder 1971 [Entelophyllidae]
  • Migros [Foraminifera]
  • Miguashaia, Schultze 1973 [Miguashaiidae]
  • Mikadotrochus, Lindoholm 1927 [Pleurotomariidae]
  • Mikhailovella [Foraminifera]
  • Mikhnocyathus [Ajacicyathida]
  • Mikhnocyathus [Archaeocyathida]
  • Miklukhoceras, Pavlov 1967 [Medlicottiidae]
  • Mikrocidari [Cidaroida]
  • Milaculum [Palaeoscolecida]
  • Milananguilla, Blot 1978 [Anguilliformes]
  • Milanovskya, Egorov 1953 [Aechminellidae]
  • Milax, Blome 1984 [Eucyrtidiidae]
  • Milda, Dall and Bartsch 1904 [Pyramidellidae]
  • Miliammellus [Foraminifera]
  • Miliammina, Heron Allen and Earland [Ammodiscidae]
  • Miliola, Lamarck 1804 [Miliolidae]
  • Miliolechina [Miliolechinidae]
  • Miliolinella, Wiesner 1931 [Hauerinidae]
  • Miliolipora [Milioliporidae]
  • Miliospirella [Foraminifera]
  • Millepes [Neotaenioglossa]
  • Millepora [Milleporina]
  • Milleporella [Axinellida]
  • Milleporidium, Steinmann 1903 [Axinellida]
  • Milleporina, order [Hydrozoa]
  • Milleratia [Palaeocopida]
  • Millerella [Eostaffellidae]
  • Millericrinida, order [Crinoidea]
  • Millericrinus [Millericrinida]
  • Millkoninckioceras, Kummel 1963 [Koninckioceratidae]
  • Millosevichia [Cephalaspida]
  • Millythyris [Postepithyrididae]
  • Milneria, Dall 1871 [Carditidae]
  • Milonicystis [Cornuta]
  • Milovanovicia [Radiolitidae]
  • Miltha (H. Adams and A. Adams 1857) [Lucinidae]
  • Milthona, Marwick 1931 [Lucinidae]
  • Miltites, E. v. Mojsisovics 1893 [Haloritidae]
  • Mimachlamys, Iredale 1929 [Pectinidae]
  • Mimagoniatites, Eichenberg 1930 [Mimagoniatitidae]
  • Mimanarcestes, Bogoslovsky 1969 [Latanarcestidae]
  • Mimella, Cooper 1930 [Plectorthidae]
  • Mimetaster [Mimetasterida]
  • Mimetasterida, order, Beurlen 1934 [Marrelomorpha]
  • Mimeticosia [Hexactinosa]
  • Mimia, Gardiner and Bartram 1977 [Palaeonisciformes]
  • Mimikonstantia [Thecideidae]
  • Mimimitoceras, Korn 1988 [Prionoceratidae]
  • Mimocystites [Rhombifera]
  • Mimograptus [Graptoloidea]
  • Mimolychnoceras [Oncocerida]
  • Mimorina [Terebratulidae]
  • Mimosphinctes, Eichenberg 1931 [Mimosphinctidae]
  • Minatoa, Flügel 1974 [Durhaminidae]
  • Minepharus [Cardiniidae]
  • Minervaecystis [Soluta]
  • Minervapecten [Pterioida]
  • Minetrigonia [Trigoniidae]
  • Minganoceras, Foerste 1938 [Valcouroceratidae]
  • Miniacina [Homotrematidae]
  • Minicephalus, Lochmann and Lu 1960 [Illaenuridae]
  • Minicidaris [Cidaroida]
  • Minicrinus, Prokop 1970 [Crinoidea]
  • Miniprokopia [Dalmanellidae]
  • Minispina [Productidae]
  • Minitheca [Orthothecida]
  • Minithyris, Radulovic 1991 [Terebratulida]
  • Miniuva [Foraminifera]
  • Minkella, Lochmann and Hu 1959 [Parabolinoididae]
  • Minnivola, Iredale 1939 [Pectinidae]
  • Minojapanella, Fujimoto and Kanuma 1953 [Schubertellidae]
  • Minolia, A. Adams 1860 [Trochidae]
  • Minororthis [Dalmanellidae]
  • Minouxia [Foraminifera]
  • Minuinsella [Redlichiida]
  • Minussiella, Bulvanker 1952 [Disphyllidae]
  • Minussina, Morozova 1961 [Trepostomida]
  • Minutiscala [Neotaenioglossa]
  • Minutostropheodonta [Strophodontidae]
  • Minyaichme [Foraminifera]
  • Minythyra [Verneuiliidae]
  • Mioawateria, P. Vella 1954 [Turridae]
  • Miocardiella [Cardiida]
  • Miocardiopsis [Cardiida]
  • Miocenebra [Neogastropoda]
  • Miocytheridea [Podocopida]
  • Miodomeris [Cardiida]
  • Miodontiscus, Dall 1903 [Carditidae]
  • Mioerycina, Kautsky 1939 [Montacutidae]
  • Miofractarmilla [Archaeogastropoda]
  • Miogryphus, Hertlein and Grant 1944 [Terebratulida]
  • Miogypsina, Sacco 1893 [Miogypsinidae]
  • Miogypsinita [Foraminifera]
  • Miogypsinoides [Foraminifera]
  • Miolepidocyclina [Foraminifera]
  • Miolyncina [Neotaenioglossa]
  • Miophora [Scleractinia]
  • Miopila [Neotaenioglossa]
  • Mioplax, Bittner 1884 [Chasmocarcinidae]
  • Mioplosus, Cope 1877 [Perciformes]
  • Mioporomya [Pholadomyida]
  • Mioptychopyge, Zhou et al. [Asaphida]
  • Miorangia [Cardiida]
  • Mioscapophyllia [Scleractinia]
  • Miosorites [Soritidae]
  • Mirabiloceras, Flower 1955 [Allotrioceratidae]
  • Mirabole, Osmolska 1962 [Proetidae]
  • Miracrinus [Sagenocrinida]
  • Miraculaspis, Romanenko 1967 [Agnostida]
  • Miraculum [Palaeocopida]
  • Miracythere [Podocopida]
  • Miralda, Carpenter 1856 [Pyramidellidae]
  • Miranda, Jegorova 1984 [Ptychopariida]
  • Miranella, Pokrovskaya 1960 [Corynexochidae]
  • Mirapecten, Dall et al. 1938 [Pectinidae]
  • Mirascapha, Stewart 1926 [Cephalaspida]
  • Miraspis, R. Richter and E. Richter 1917 [Odontopleuridae]
  • Miratheca [Problematica]
  • Mirechinus [Temnopleuroida]
  • Miricardium [Cardiida]
  • Miriella [Sachitida]
  • Mirifica [Foraminifera]
  • Mirifusella [Spiriferidae]
  • Mirifusus, Pessagno 1977 [Parvicingulidae]
  • Mirilentia, Ruzhencev and Bogoslovskaya 1971 [Neoglyphioceratidae]
  • Mirilingula, Popov 1983 [Lingulellotretidae]
  • Miriproetus, Snajdr 1977 [Tropidocoryphidae]
  • Mirisquamea [Lobothyrididae]
  • Mirlolaminatus [Neotaenioglossa]
  • Miroclymenia [Clymeniida]
  • Miroelasma [Anthozoa]
  • Mirojuvavites, Wang and He 1976 [Haloritidae]
  • Mironovella [Foraminifera]
  • Mirorthis [Dalmanellidae]
  • Mirosphinctes [Cephalopoda]
  • Mirua [Nassariidae]
  • Mirula, Palmer 1942 [Terebridae]
  • Miscellanea [Pellatispiridae]
  • Miseia [Hippuritida]
  • Misikella, Kozur and Mock 1974 [Conodontophorida]
  • Misolia [Diplospirellidae]
  • Missisquoia, Shaw 1951 [Missisquoiidae]
  • Mississippina [Mississippinidae]
  • Misteia [Neogastropoda]
  • Mistostigma, Berry 1947 [Gastropoda]
  • Mitchellaspis, Henningsmoes 1959 [Phacopida]
  • Mitchellella [Leptostrophiidae]
  • Mithracia, Bell 1858 [Majidae]
  • Mithracites, Gould 1859 [Mithracitidae]
  • Mitoclema [Cyclostomata]
  • Mitoclemella [Cyclostomata]
  • Mitonia, Renz and Alvarez 1979 [Acanthoceratidae]
  • Mitorthoceras, Gordon 1960 [Pseudorthoceratidae]
  • Mitra, Lamarck 1798 [Mitridae]
  • Mitra (Atrimitra), Dall 1918 [Mitridae]
  • Mitracalpis, Haeckel 1881 [Plagoniidae]
  • Mitraria, Rafinesque 1815 [Mitridae]
  • Mitrata, order, Jaekel 1918 [Stylophora]
  • Mitratoma [Neogastropoda]
  • Mitrax [Decapoda]
  • Mitrella, Risso 1826 [Columbellidae]
  • Mitrellotaxis [Conodontophorida]
  • Mitrelloturris [Neogastropoda]
  • Mitreola, Swainson 1833 [Volutidae]
  • Mitridomus, N. F. Sohl 1963 [Costellariidae]
  • Mitrithara, Hedley 1922 [Turridae]
  • Mitrocaprina, Boehm 1895 [Plagioptychidae]
  • Mitroceras, Hyatt 1894 [Brevicoceratidae]
  • Mitrocrinus [Crinoidea]
  • Mitrocystella [Mitrata]
  • Mitrocystites [Mitrata]
  • Mitrodendron, Quenstedt 1880 [Amphiastreidae]
  • Mitrodrillia [Neogastropoda]
  • Mitrolumna, Bucquoy et al. 1883 [Turridae]
  • Mitromorpha, Carpenter 1865 [Turridae]
  • Mitsukurina, Jordan 1898 [Mitsukurinidae]
  • Mixoconus [Conodontophorida]
  • Mixogonaria [Anthozoa]
  • Mixomanticoceras, Becker et al. 1993 [Gephuroceratidae]
  • Mixopterus [Eurypterida]
  • Mixosaurus, Baur 1887 [Mixosauridae]
  • Mixosiphonoceras, Hyatt 1900 [Jovellaniidae]
  • Mixtipecten, Marwick 1928 [Pterioida]
  • Mixtusdictyon [Stromatoporoidea]
  • Miyagipecten, Masuda 1952 [Pectinidae]
  • Miyakoceras [Silesitidae]
  • Miyakothyris [Dallinidae]
  • Mizuhopecten, Masuda 1963 [Pectinidae]
  • Mjandymoceras [Discosorida]
  • Mjoesina, N. Spjeldnaes 1957 [Glyptomenidae]
  • Mnemoceras [Oncocerida]
  • Mnestia, H. Adams and A. A 1854 [Scaphandridae]
  • Mnestocylichnella, Oppenheim 1896 [Cephalaspida]
  • Moapocrinus [Cladida]
  • Mobergella, Herdström 1923 [Mobergellidae]
  • Mobula, Rafinesque 1810 [Myliobatidae]
  • Mochella [Podocopida]
  • Mochtyella [Eunicemorpha]
  • Modelia [Archaeogastropoda]
  • Moderatoproductus [Monticuliferidae]
  • Modesta, Cherepnina 1962 [Stauriidae]
  • Modestella [Zeilleriidae]
  • Modiella, Hall 1885 [Kalenteridae]
  • Modiodonta [Modiomorphidae]
  • Modiolarca, Gray 1843 [Crenellidae]
  • Modiolatus [Mytilidae]
  • Modiolina [Cardiida]
  • Modiolodon, Ulrich 1894 [Modiomorphidae]
  • Modiolula, Sacco 1808 [Mytilidae]
  • Modiolusia, Yamamoto and Habe 1958 [Mytilidae]
  • Modiomorpha, Hall and Whitfield 1869 [Modiomorphidae]
  • Modiomorphoida, order, Newell 1969 [Bivalvia]
  • Modiomytilus [Mytilida]
  • Modocia, Walcott 1924 [Marjumiidae]
  • Modulus, Gray 1842 [Modulidae]
  • Moeckowia [Palaeocopida]
  • Moelleria, Jeffreys 1865 [Turbinidae]
  • Moelleritia, Abushik 1958 [Leperditiidae]
  • Moenocrinus [Isocrinida]
  • Moerckeia [Neotaenioglossa]
  • Moerella, Fischer 1887 [Tellinidae]
  • Moeschia [Postepithyrididae]
  • Moesiloculina [Hauerinidae]
  • Mogoktella [Huenellidae]
  • Mogoliella [Carinatinidae]
  • Moierina [Palaeocopida]
  • Moira, Agassiz 1872 [Schizasteridae]
  • Moiropsis [Schizasteridae]
  • Mojczalepas [Turrilepadida]
  • Mojczatheca [Circothecida]
  • Mojczatrypa [Trepostomida]
  • Mojczella [Palaeocopida]
  • Mojsisovicsites, Gemmellaro 1904 [Thisbitidae]
  • Mojsisovicsteuthis [Aulacocerida]
  • Mojsvarites, Pompeckj 1895 [Ussuritidae]
  • Mojsvaroceras, Hyatt 1883 [Tainoceratidae]
  • Mokattamia [Cardiida]
  • Mokotibaster [Toxasteridae]
  • Mola, Linck 1790 [Molidae]
  • Molaria [Arthropoda]
  • Molengraafia [Auriculospongiidae]
  • Mollia [Microporidae]
  • Mollisonia, Walcott 1912 [Arthropoda]
  • Mollocrinus, Wanner 1916 [Cladida]
  • Molongcola [Strophomenidae]
  • Molongella [Dalmanellidae]
  • Molongia [Retziellidae]
  • Molophyllum [Anthozoa]
  • Moltkia [Gorgonacea]
  • Molukkana [Pholadomyida]
  • Molukkia, Jaworski 1915 [Scleractinia]
  • Molva, Lesueur 1819 [Lotidae]
  • Monacanthites [Melagathiceratidae]
  • Monachiopsis, Kretzoi 1941 [Carnivora]
  • Monachocrinus, Clark 1919 [Isocrinida]
  • Monachus, Flemming 1822 [Phocidae]
  • Monadoblastus, R. O. Fay 1961 [Spiraculata]
  • Monadotoechia [Septalariidae]
  • Monalaria [Neotaenioglossa]
  • Monasterium, Fleming 1973 [Archaeocopida]
  • Moncharmontia [Charentiidae]
  • Monelasmina [Draboviidae]
  • Monetaria [Cypraeidae]
  • Monexagnostus, Liu 1982 [Agnostida]
  • Mongoceras [Orthocerida]
  • Mongoliacus [Problematica]
  • Mongoliella [Mongolellidae]
  • Mongoliolites, Bondarenko and Minzhin 1977 [Sibiriolitidae]
  • Mongoliopsis [Perissothyrididae]
  • Mongolirhynchia [Rhynchonellida]
  • Mongolitesta [Problematica]
  • Mongolitubulus, Missarzhevsky 1977 [Pseudoconodontida]
  • Mongolocarpos [Mitrata]
  • Mongoloceras, Ruzhencev 1960 [Mongoloceratidae]
  • Mongoloclema [Trepostomida]
  • Mongolodictya [Cystoporata]
  • Mongolodus, Missarzhevsky 1977 [Protoconodonta]
  • Mongolorhynx [Hebetoechiidae]
  • Mongolosia [Aulostegidae]
  • Mongolospira [Mongolospiridae]
  • Moniellocrinus, Pidal 1984 [Diplobathrida]
  • Monilea, Swainson 1840 [Trochidae]
  • Moniliopsis [Neogastropoda]
  • Moniliretusa, Sohl 1963 [Cephalaspida]
  • Monilispongia, Wu and Xiao 1989 [Craticulariidae]
  • Monitilora, Iredale 1930 [Lucinidae]
  • Monkaspis, Kobayashi 1935 [Monkaspididae]
  • Monnieria [Hippuritida]
  • Monobathrida, order, R. C. Moore and L. R. Laudon 1943 [Crinoidea]
  • Monoblastus [Spiraculata]
  • Monobolina [Elkaniidae]
  • Monobrachiocrinus, Wanner 1916 [Cladida]
  • Monocentris, Schneider 1801 [Beryciformes]
  • Monoceratella [Podocopida]
  • Monoceratina, Roth 1928 [Bythocytheridae]
  • Monoceratopora [Cribrilinidae]
  • Monocerina [Cheilostomata]
  • Monocheilus, Resser 1937 [Dikelocephalidae]
  • Monochirus, Rafinesque 1814 [Pleuronectiformes]
  • Monocirsus [Neotaenioglossa]
  • Monocladodus, Claypole 1893 [Cladoselachidae]
  • Monoclimacis [Graptoloidea]
  • Monoconvexa, Pel'man 1977 [Obolellida]
  • Monocostodus [Conodontophorida]
  • Monocuphus [Neotaenioglossa]
  • Monocyathida, order, Okulitch 1943 [Regulares]
  • Monocyrtoceras, Foerste 1924 [Armenoceratidae]
  • Monodaeus, Guinot 1967 [Xanthidae]
  • Monodechella, Stumm 1953 [Proetida]
  • Monodechenella, Stumm 1953 [Proetidae]
  • Monodentella [Archaeogastropoda]
  • Monodesmopora [Cyclostomata]
  • Monodiadema [Acrosaleniidae]
  • Monodilepas [Archaeogastropoda]
  • Monodonta, Lamarck 1799 [Trochidae]
  • Monograptus [Graptoloidea]
  • Monolene, Goode 1881 [Pleuronectiformes]
  • Monomerella, Billings 1872 [Trimerellidae]
  • Monomitopus, Alcock 1890 [Ophidiiformes]
  • Monomuchites, A. E. Wilson 1961 [Proteoceratidae]
  • Monomyces, Ehrenberg 1834 [Flabellidae]
  • Mononotella, Ulrich and Bassler 1931 [Indianidae]
  • Monophyllites, E. v. Mojsisovics 1879 [Ussuritidae]
  • Monopleura [Caprotinidae]
  • Monopophorus [Neogastropoda]
  • Monoporella [Cheilostomata]
  • Monopteria [Pterioida]
  • Monoptygma [Neogastropoda]
  • Monorakos, Schmidt 1886 [Pterygometopidae]
  • Monorthis [Hesperonomiidae]
  • Monoschizablastus [Spiraculata]
  • Monosera [Nassellaria]
  • Monospinites, Vassiljeva and Sayutina 1988 [Chancelloriidae]
  • Monosulcatina, Rozova 1963 [Lonchocephalidae]
  • Monotaxinoides [Lasiodiscidae]
  • Monothyra, Tryon 1862 [Pholadidae]
  • Monotiopleura [Palaeocopida]
  • Monotis, Bronn 1830 [Monotidae]
  • Monotis (Eomonotis), J.A. Grant-Mackie 1978 [Monotidae]
  • Monotrypa [Trepostomida]
  • Monotrypella [Trepostomida]
  • Monsardithyris, Almeras 1971 [Lissajousithyrididae]
  • Monsella [Cheilostomata]
  • Monsmirabilia [Podocopida]
  • Monspeliensina [Foraminifera]
  • Monsteraphyllum [Anthozoa]
  • Monstrocrinus, W.E. Schmidt 1942 [Diplobathrida]
  • Montacuta, Turton 1822 [Montacutidae]
  • Montanablastus [Spiraculata]
  • Montanaria, Spriesterbach 1909 [Mactromyidae]
  • Montanella [Gusarellidae]
  • Montastrea, Blainville 1830 [Faviidae]
  • Montecaris [Archaeostraca]
  • Montfortella [Foraminifera]
  • Montfortula, Iredale 1915 [Fissurellidae]
  • Montia, Gilbert 1973 [Volutidae]
  • Monticellaria [Cheilostomata]
  • Monticlarella, Wisniewska 1932 [Norellidae]
  • Monticulifera [Monticuliferidae]
  • Monticuliphyllia [Scleractinia]
  • Monticulipora [Trepostomida]
  • Montipora, Blainville 1830 [Acroporidae]
  • Montlivaltia, Lamouroux 1821 [Montlivaltiidae]
  • Montlivaltia (Plesiomontlivaltia), Alloiteau 1957 [Montlivaltiidae]
  • Montsechiana [Foraminifera]
  • Montsenetes [Chonetidae]
  • Montyoceras, Flower 1941 [Hebetoceratidae]
  • Moorea [Podocopida]
  • Moorefieldella [Trigonirhynchiidae]
  • Mooreinella [Foraminifera]
  • Moorelina () [Thecidellinidae]
  • Mooreocrinus, Wright and Strimple 1945 [Cladida]
  • Moorephylloporina [Fenestrata]
  • Moorites [Youngiellidae]
  • Mooritheca [Orthothecida]
  • Moorowipora [Anthozoa]
  • Moosina [Podocopida]
  • Mootwingeecyathus [Ajacicyathida]
  • Mopsea [Gorgonacea]
  • Moquellina, Jin et al. 1979 [Cyclothyrididae]
  • Moravammina [Foraminifera]
  • Moraviaturia [Dyscoliidae]
  • Moravilla [Ambocoeliidae]
  • Moravocoryphe, Pribyl and Vanek 1978 [Proetida]
  • Moravophyllum, Kettnerova 1932 [Cyathophyllidae]
  • Moravostrophia [Douvillinidae]
  • Moravurus [Xiphosurida]
  • Morchellastraea [Scleractinia]
  • Morchiella [Rissoidae]
  • Morea, Conrad 1860 [Pholidotomidae]
  • Moreauoceras, Cullison 1944 [Tarphyceratidae]
  • Moremanoceras, Cobban 1972 [Desmoceratidae]
  • Morenicyathus [Ajacicyathida]
  • Moretarva [Trilobita]
  • Moretia [Demospongea]
  • Moretia [Lychniscosa]
  • Moretiella, Breistroffer 1949 [Dactylocalycidae]
  • Moretispongia, Breistroffer 1949 [Jereicidae]
  • Morganella [Araksalosiidae]
  • Morgania [Neotaenioglossa]
  • Morgatia, Hammann 1972 [Dalmanitidae]
  • Morinorhynchus [Chilidiopsidae]
  • Morionella [Cassidae]
  • Morkhovenia [Podocopida]
  • Morkhovenicythereis [Podocopida]
  • Mormula, Adams 1864 [Pyramidellidae]
  • Morocconites, Boucot and McClure 1989 [Phacopida]
  • Moronaster [Asterostomatidae]
  • Morone, Mitchill 1814 [Perciformes]
  • Morosyringium [Nassellaria]
  • Moroteuthis [Teuthida]
  • Morozovapora [Fenestrata]
  • Morozovella [Foraminifera]
  • Morphasmopora [Cheilostomata]
  • Morphastrea, d'Orbigny 1850 [Agariciidae]
  • Morphoceras [Morphoceratidae]
  • Morrisiceras [Macrocephalitidae]
  • Morrisithyris [Lissajousithyrididae]
  • Morrowcrinus, Moore and Plummer 1937 [Scytalocrinidae]
  • Mortensenaster [Spatangoida]
  • Mortieria [Demospongea]
  • Mortoniceras, Meek 1876 [Brancoceratidae]
  • Mortoniceras (Cantabrigites), Spath 1933 [Brancoceratidae]
  • Morula, Schumacher 1817 [Muricidae]
  • Morum, Röding 1798 [Harpidae]
  • Morunella [Neogastropoda]
  • Morycastraea, Melnikova 1984 [Pamiroseriidae]
  • Mosaeleberis [Podocopida]
  • Mosasaurus, Conybeare 1822 [Mosasauridae]
  • Mosathoa [Cheilostomata]
  • Moschoglossis, R. Goldring 1958 [Proetidae]
  • Moscovicrinus, Jaekel 1918 [Cladida]
  • Moselopterus [Eurypterida]
  • Mosherella [Conodontophorida]
  • Moskovia, Sokolov 1950 [Chaetetidae]
  • Mosquella [Tetrarhynchiidae]
  • Mostlerella [Podocopida]
  • Mostlerium, Cheng 1986 [Archocyrtiidae]
  • Motina [Arthropoda]
  • Motyris, Eames 1952 [Turritellidae]
  • Moumina [Martiniidae]
  • Moundocrinus, Strimple 1939 [Aesiocrinidae]
  • Mourlonopsis [Neotaenioglossa]
  • Moussonella [Pterioida]
  • Moutoniceras [Cephalopoda]
  • Moutonithyris [Sellithyrididae]
  • Movschovitschia, Kozur 1971 [Glorianellidae]
  • Moxomia [Olenidae]
  • Moyacanthus [Ctenacanthiformes]
  • Moyerella, Nekhoroshev 1956 [Nematotrypidae]
  • Moythomasia, Gross 1950 [Palaeonisciformes]
  • Mrassiella [Pterioida]
  • Mrassocyathus [Ajacicyathida]
  • Mrhilaia [Heterostrophia]
  • Mstikhinoceras, Shimanskiy 1961 [Ormoceratidae]
  • Mstinia [Foraminifera]
  • Mstiniella [Foraminifera]
  • Muchattocyathus [Ajacicyathida]
  • Muconalia [Neotaenioglossa]
  • Mucophyllum, Etheridge 1894 [Mucophyllidae]
  • Mucrodactylites [Dactylioceratidae]
  • Mucronaspis, Destombes 1963 [Dalmanitidae]
  • Mucronella [Escharellidae]
  • Mucronina [Nodosariidae]
  • Mucrospirifer, Grabau 1931 [Mucrospiriferidae]
  • Mucrospiriferinella [Pennospiriferinidae]
  • Muellerina, Bassiouni 1965 [Hemicytheridae]
  • Muellerithalamia [Minchinellidae]
  • Muellerodus [Conodonta]
  • Muensterella, Schevill 1950 [Muensterellidae]
  • Muensterites, E. Mojsisovics 1893 [Trachyceratidae]
  • Mufushanella [Verbeekinidae]
  • Muiroceras, Flower 1949 [Rutoceratidae]
  • Muirwoodella [Muirwoodellidae]
  • Muirwoodia [Productidae]
  • Mulinia, Gray 1837 [Mactridae]
  • Mulinoides [Cardiida]
  • Mulletia [Pterioida]
  • Multicameroceras, Kobayashi 1933 [Plectronoceratidae]
  • Multicarinophyllum, Spasskiy 1965 [Amsdenoididae]
  • Multicavea [Cyclostomata]
  • Multiconus, Ljaschenko 1955 [Multiconidae]
  • Multicorhynchia [Triasorhynchiidae]
  • Multicostella [Plaesiomyidae]
  • Multicrescis [Cyclostomata]
  • Multifascigera [Cyclostomata]
  • Multifidella [Foraminifera]
  • Multigalea [Lichenoporidae]
  • Multiloqua, Laubenfels 1955 [Hexactinosa]
  • Multioistodus [Conodontophorida]
  • Multiphragma [Trepostomida]
  • Multipocula [Demospongea]
  • Multiprion [Eunicemorpha]
  • Multiptyxis [Heterostrophia]
  • Multiridgia [Aegiromenidae]
  • Multiseptida [Colaniellidae]
  • Multisolenia, Fritz 1937 [Multisoleniidae]
  • Multisparsa [Cyclostomata]
  • Multispinula, Rowell 1962 [Siphonotretidae]
  • Multispirifer [Acrospiriferidae]
  • Multispirina [Alveolinidae]
  • Multithecopora, Yoh 1927 [Multithecoporidae]
  • Multitubigera [Cyclostomata]
  • Multivasculatus [Reticulosa]
  • Multizonopora [Cyclostomata]
  • Mumiella [Cheilostomata]
  • Mummaspis [Olenellidae]
  • Mundaster [Spatangoida]
  • Munditia, Finlay 1926 [Liotiidae]
  • Munditiella, Kuroda and Habe 1954 [Turbinidae]
  • Mundocephalina, Repina 1958 [Ptychopariida]
  • Munhella [Hesperorthidae]
  • Munida, W. Leach 1820 [Galatheidae]
  • Munidopsis, J. F. Whiteaves 1874 [Munidopsidae]
  • Munieratrypa [Punctatrypidae]
  • Muniericeras [Muniericeratidae]
  • Munijia [Ptychopariida]
  • Munitheites, Lorenthey 1929 [Galatheidae]
  • Mupus, Cocco 1833 [Centrolophidae]
  • Muraena, C. Linnaeus 1758 [Anguilliformes]
  • Muraenesox, Mclelland 1843 [Anguilliformes]
  • Murania, Kazmierczak 1974 [Milleporellidae]
  • Murchisonella [Neotaenioglossa]
  • Murchisoniceras [Orthocerida]
  • Murciella [Rhapydioninidae]
  • Muregina, DeVries 2005 [Muricidae]
  • Murengoloclema [Fenestrata]
  • Murex, Linnaeus 1758 [Muricidae]
  • Murex (Ceratostoma), Hermannsen 1846 [Muricidae]
  • Murex (Subpterynotus), Olsson and Harbison 1953 [Muricidae]
  • Murexiella, Clench and Farfante 1945 [Muricidae]
  • Murexiella (Subpterynotus), Olsson and Harbison 1953 [Muricidae]
  • Murexsul, Iredale 1915 [Muricidae]
  • Murgeina [Nautiloculinidae]
  • Murgella [Soritidae]
  • Murguithalamia [Verticillitida]
  • Muricanthus, Swainson 1840 [Muricidae]
  • Muricassis [Neotaenioglossa]
  • Muricoglobigerina [Foraminifera]
  • Muricopsis, Bucquoy et al. 1882 [Muricidae]
  • Muricotrochus, Cossmann 1918 [Proconulidae]
  • Muriferella [Draboviidae]
  • Murinella [Strophomenidae]
  • Murinopsia [Cheilostomata]
  • Murjukiana [Hesperonomiidae]
  • Murmur, Whitley 1951 [Arthrodira]
  • Muroserpula [Serpulimorpha]
  • Murotriton [Muricidae]
  • Murphitys [Neogastropoda]
  • Murphyphyllum [Anthozoa]
  • Murravechinus [Phymosomatoida]
  • Murravia [Cancellothyrididae]
  • Murrayina [Podocopida]
  • Murrayinella [Glabratellidae]
  • Murrayoceras, Foerste 1926 [Sactorthoceratidae]
  • Murrindalaspis, Long 1984 [Acanthothoraciformes]
  • Mursia, Leach 1823 [Calappidae]
  • Mursiopsis, Ristori 1889 [Calappidae]
  • Murthya [Podocopida]
  • Murtiella [Palaeocopida]
  • Musashia [Volutidae]
  • Muscochitina [Rhizopodea]
  • Musculiopsis [Cardiida]
  • Musculista, Yamamoto and Habe 1958 [Mytilidae]
  • Musicrinus, Donovan 1985 [Crinoidea]
  • Mussa, Oken 1815 [Mussidae]
  • Mustelus [Carchariidae]
  • Mutationella [Meganterididae]
  • Mutiella, Stoliczka 1871 [Lucinidae]
  • Mutilus [Podocopida]
  • Mya, Linnaeus 1758 [Myidae]
  • Myadesma [Cardiida]
  • Myadora, Gray 1840 [Myochamidae]
  • Myadoropsis [Pholadomyida]
  • Myagropora [Cheilostomata]
  • Myagrostoma [Archaeogastropoda]
  • Myalinopterella [Pterioida]
  • Myapalmula [Mytilida]
  • Mycedium, Oken 1815 [Pectiniidae]
  • Mycetaraea, Pratz 1882 [Microsolenidae]
  • Mycetophyllia, Milne-Edwards and Haime 1848 [Mussidae]
  • Mycetophylliopsis, Oppenheim 1930 [Montlivaltiidae]
  • Mychostomina, Berthelin 1881 [Planispirillinidae]
  • Mycocrinus, Schultze 1866 [Crinoidea]
  • Myctophiformes, order, Regan 1911 [Actinopteri]
  • Myctophum, Rafinesque 1810 [Myctophidae]
  • Myeinocystites [Soluta]
  • Myelastrum, Haeckel 1887 [Myelastridae]
  • Myelodactylus, Hall 1852 [Crinoidea]
  • Myinda, Stubblefield and Bulman 1927 [Trinucleidae]
  • Myindella, Hutchison and Ingham 1962 [Trinucleidae]
  • Myliobatiformes, order, Compagno 1973 [Chondrichthyes]
  • Myliobatis, Cuvier 1816 [Myliobatidae]
  • Myliusia, Gray 1859 [Euretidae]
  • Myllita, d'Orbigny 1850 [Erycinidae]
  • Myllitella, Finlay 1926 [Erycinidae]
  • Myllocercion, Foreman 1968 [Carpocaniidae]
  • Mylloconotreta, Williams and Curry 1985 [Torynelasmatidae]
  • Myloceras [Discosorida]
  • Mylomyrus, Woodward 1910 [Anguilliformes]
  • Mylostoma, Newberry 1883 [Arthrodira]
  • Myobarbum, N. F. Sohl 1963 [Volutidae]
  • Myochama, Stutchbury 1830 [Myochamidae]
  • Myoconcha, J. de C. Sowerby 1824 [Kalenteridae]
  • Myodakryotus [Arcida]
  • Myodocopida, order, Sars 1866 [Ostracoda]
  • Myoforceps [Mytilidae]
  • Myofossa [Sanguinolitidae]
  • Myoida, order, Goldfuss 1820 [Bivalvia]
  • Myomphalis [Palaeocopida]
  • Myopholas, Douvill 1908 [Ceratomyidae]
  • Myophorella, Bayle 1878 [Myophorellidae]
  • Myophoria, Bronn 1834 [Myophoriidae]
  • Myophoricardium, Wöhrmann 1889 [Myophoricardiidae]
  • Myophorigonia [Trigoniidae]
  • Myophoriopis, Wöhrmann 1889 [Myophoricardiidae]
  • Myoplusia, Neumayr 1884 [Malletiidae]
  • Myoproetus, Snajdr 1976 [Proetidae]
  • Myopsolenus, Hupe 1952 [Ellipsocephalidae]
  • Myoscolex [Radiodonta]
  • Myotreta [Ephippelasmatidae]
  • Myra, Leach 1817 [Leucosiidae]
  • Myrakeena [Ostreidae]
  • Myrene [Neomiodontidae]
  • Myriapora [Myriaporidae]
  • Myriastiches [Lepidocentridae]
  • Myriophyllia, d'Orbigny 1849 [Faviidae]
  • Myriophyllum, Cuif 1975 [Conophyllidae]
  • Myrioporina [Axinellida]
  • Myriospirifer [Cyrtiidae]
  • Myriozoum [Cheilostomata]
  • Myripristis, Cuvier 1827 [Perciformes]
  • Myristica [Melongenidae]
  • Myrmecidium, Vinassa de Regny 1901 [Sestrostomellidae]
  • Myrmeciophytum, Schrammen 1910 [Siphoniidae]
  • Myrmecomimus, Opik 1979 [Ptychagnostidae]
  • Myrmirhynx [Trigonirhynchiidae]
  • Myroconger, Guenther 1879 [Anguilliformes]
  • Myrsopsis [Cardiida]
  • Myrtea, Turton 1822 [Lucinidae]
  • Myrteopsis, Sacco 1901 [Lucinidae]
  • Myrtillocrinus, Sandberger 1856 [Cladida]
  • Myrtucina [Cardiida]
  • Mysella, Angas 1877 [Montacutidae]
  • Mysia, Lamarck 1818 [Petricolina]
  • Mysidacea, order [Malacostraca]
  • Mysidae, family [Mysidacea]
  • Mysidiella [Mytilida]
  • Mysidoptera [Pterioida]
  • Mysterioceras, Teichert and Glenister 1953 [Mysterioceratidae]
  • Mysterium [Hexactinosa]
  • Mysticoceras, Ulrich and Foerste 1936 [Proterocameroceratidae]
  • Mysticocrinus [Sagenocrinida]
  • Mystriophis, Kaup 1856 [Anguilliformes]
  • Mystriopora [Cheilostomata]
  • Mystrocephala, Whittington 1960 [Brachymetopidae]
  • Mystrophora [Mystrophoridae]
  • Mytella, Soot-Ryen 1955 [Mytilidae]
  • Mytilaster [Mytilidae]
  • Mytilisepta [Mytilidae]
  • Mytiloceramus [Pterioida]
  • Mytiloida, order, Rafinesque 1815 [Bivalvia]
  • Mytiloides, Brongniart 1822 [Inoceramidae]
  • Mytiloperna [Malleidae]
  • Mytilops [Mytilida]
  • Mytilus, Linnaeus 1758 [Mytilidae]
  • Myttonia, Whittard 1955 [Trinucleidae]
  • Myurella, Hinds 1844 [Terebridae]
  • Myxilla [Poecilosclerida]
  • Myxiniformes, order [Myxini]
  • Myzostomaria, class [Annelida]
  • Naanchangasaurus [Reptilia]
  • Nabarredia [Strophochonetidae]
  • Nabiaoia [Aegiromenidae]
  • Nacca, Risso 1826 [Naticidae]
  • Nacella, Schumacher 1817 [Nacellidae]
  • Nacocrinus, Webster and Olson 1998 [Cladida]
  • Nactocrinus [Cladida]
  • Nadalina, Narbonne and Hofmann 1987 [Medusae]
  • Nadiyella, Romanenko 1988 [Asaphida]
  • Nadotia, Tsyganko 1974 [Stauriidae]
  • Naedyceras, Hyatt 1884 [Brevicoceratidae]
  • Naefia, Wetzel 1930 [Sepiida]
  • Naefiteuthididae, family [Boletzkida]
  • Naevhithis [Palaeocopida]
  • Nagaoella, Hayami 1965 [Veneridae]
  • Nagaproetus, Snajdr 1977 [Tropidocoryphidae]
  • Nagatoella [Fusulinoidea]
  • Nagatophyllum, Ozawa 1925 [Aulophyllidae]
  • Nahannagnostus, Pratt 1992 [Diplagnostidae]
  • Nahannia, Chatterton and Ludvigsen 1976 [Asaphidae]
  • Nahanniaspis [Pteraspidomorphes]
  • Nahannicephalus, Pratt 1992 [Llanoaspididae]
  • Nahecaris [Archaeostraca]
  • Nairiella [Neotaenioglossa]
  • Naivs [Orthocerida]
  • Najaceras [Endocerida]
  • Najadospirifer, Havlicek 1957 [Elythynidae]
  • Najdinothyris [Terebratulida]
  • Nakanotrigonia [Trigoniida]
  • Nakazatothyris [Reticulariidae]
  • Nalivkinaria [Hebetoechiidae]
  • Nalivkinella, Soshkina 1939 [Laccophyllidae]
  • Nalivkinia [Atrypinidae]
  • Nalivkinicyathus [Ajacicyathida]
  • Namaia [Podocopida]
  • Namanoia, Lermontova 1951 [Namanoiidae]
  • Nambeetella, Legg 1976 [Ptychopariida]
  • Namnetia [Juliidae]
  • Nanacythere [Podocopida]
  • Nanahughmilleria [Eurypterida]
  • Nanambonites [Plectambonitidae]
  • Nanaochlamys [Pectinidae]
  • Nanatrypa [Glassiidae]
  • Nanchangosaurus, Wang 1959 [Hupehsuchia]
  • Nanchengella, Huo 1956 [Archaeocopida]
  • Nanggulania [Neotaenioglossa]
  • Nanicella [Loeblichiidae]
  • Nanicrinus, Frest and Strimple 1980 [Monobathrida]
  • Nanillaenus, Jaanusson 1954 [Illaenidae]
  • Nanisocetus [unclassified genus]
  • Nankinella [Staffellidae]
  • Nankinolithus, Lu 1957 [Trinucleidae]
  • Nanlingella, Rui and Sheng 1981 [Schubertellidae]
  • Nanlingella, Xiong and Wang 1980 [Grallatoridae]
  • Nanlingia, Wei and Zhou 1983 [Asaphida]
  • Nannamoria, Iredale 1929 [Volutidae]
  • Nannastacus [Cumacea]
  • Nannites, E. v. Mojsisovics 1897 [Nannitidae]
  • Nanno, Clarke 1894 [Endoceratidae]
  • Nannobelus [Belemnitida]
  • Nannoblastus, J. Wanner 1924 [Codasteridae]
  • Nannocardioceras [Cardioceratidae]
  • Nannoconus [Nannoconaceae]
  • Nannolepis [Peltopleuridae]
  • Nannolytoceras [Cephalopoda]
  • Nannopora [Cheilostomata]
  • Nannopterygius, Huene 1923 [Ophthalmosauridae]
  • Nannopyrgula [Neotaenioglossa]
  • Nannostephanus [Cephalopoda]
  • Nannovascoceras, Renz and Alvarez 1979 [Vascoceratidae]
  • Nannubasa [Archaeogastropoda]
  • Nanocarpus [Cornuta]
  • Nanocrinus, Mueller 1856 [Cladida]
  • Nanograptus [Graptoloidea]
  • Nanogyra, Beurlen 1958 [Gryphaeidae]
  • Nanonavis, Stewart 1930 [Parallelodontidae]
  • Nanopitar, Rehder 1943 [Veneridae]
  • Nanopsis [Palaeocopida]
  • Nanorthis [Plectorthidae]
  • Nanospira [Lissatrypidae]
  • Nanothyris [Centronellidae]
  • Nansenia, Jordan and Evermann 1896 [Argentinidae]
  • Nanshanophyllum, Yü 1956 [Entelophyllidae]
  • Nantanella [Stenoscismatidae]
  • Nanukidium, Jones 1979 [Pentameridae]
  • Nanurocythereis [Podocopida]
  • Naoides, Pickett 1967 [Aphrophyllidae]
  • Naos, Lang 1926 [Arachnophyllidae]
  • Napaeana, Laubenfels 1955 [Ventriculitidae]
  • Napora, Pessagno 1977 [Ultranaporidae]
  • Naptile [Arthropoda]
  • Napulus, L. W. Stephenson 1941 [Turbinellidae]
  • Naquetia, Jousseaume 1880 [Muricidae]
  • Naradanithyris [Terebratulida]
  • Naraoia, Walcott 1912 [Nektaspida]
  • Naraoiida, order [Trilobita]
  • Narayania [Foraminifera]
  • Narcine, Henle 1834 [Narcinidae]
  • Naricava [Neotaenioglossa]
  • Naricopsina [Ampullinidae]
  • Narindechinus [Phymosomatidae]
  • Narona, H. Adams and A. Adams 1854 [Cancellariidae]
  • Narthecoceras, Hyatt 1895 [Narthecoceratidae]
  • Narynella, Andreeva 1987 [Nisusiidae]
  • Nasepia [Erniettamorpha]
  • Naso, Lacpde 1802 [Acanthuridae]
  • Nasonirhynchia [Trigonirhynchiidae]
  • Nassa, Röding 1798 [Buccinidae]
  • Nassaria, Link 1807 [Nassariidae]
  • Nassarina, Dall 1889 [Columbellidae]
  • Nassarina (Zanassarina), Pilsbry and Lowe 1932 [Columbellidae]
  • Nassarius, Duméril 1806 [Nassariidae]
  • Nassauoceras, Miller 1932 [Tetragonoceratidae]
  • Nassellaria, order, Ehrenberg 1875 [Radiolaria]
  • Nassicola, Finlay 1924 [Buccinidae]
  • Nassovia, Howell 1937 [Ptychopariida]
  • Nassoviocrinus, Jaekel 1918 [Cladida]
  • Nataliella, Sytova 1966 [Ketophyllidae]
  • Natalina, Romanenko 1978 [Hebediscidae]
  • Natalophyllum, Radugin 1938 [Alveolitidae]
  • Natella [Naticidae]
  • Nathorstella [Pterioida]
  • Nathorsthia [Merostomoidea]
  • Nathorstites, Boehm 1903 [Nathorstitidae]
  • Natica, Scopoli 1777 [Naticidae]
  • Natica (Pliconacca), Cossmann and Martin 1914 [Naticidae]
  • Natitaria [Neotaenioglossa]
  • Natlandia, David 1946 [Salmoniformes]
  • Natmus, Jell 1985 [Ptychopariida]
  • Naukat [Naukatidae]
  • Naukatoidea, superfamily, Popov and Tikhonov 1990 [Naukatida]
  • Naulia [Cardiida]
  • Naupliella [Foraminifera]
  • Naustia, Ludvigsen 1982 [Remopleurididae]
  • Nautellipsites [Muensteroceratidae]
  • Nautilida, order, Agassiz 1847 [Cephalopoda]
  • Nautiloceras [Nautilida]
  • Nautiloculina, Mohler 1938 [Nautiloculinidae]
  • Navarella [Foraminifera]
  • Navarracythere [Podocopida]
  • Navicularina [Ostracoda]
  • Naviculina [Podocopida]
  • Navispira [Anoplothecidae]
  • Navoites [Anthozoa]
  • Nawnites [Polychaeta]
  • Nayadina, Munier-Chalmas 1864 [Malleidae]
  • Nayunnella [Yunnanellidae]
  • Nazarovella, De Wever and Caridroit 1984 [Ormistonellidae]
  • Neaeromya, Gabe 1873 [Lasaeidae]
  • Neaeroporomya, Cossmann 1886 [Poromyidae]
  • Neaguites [Miliolidae]
  • Neamphitomaria [Archaeogastropoda]
  • Neancyloceras, Spath 1926 [Diplomoceratidae]
  • Neanthias, Steindachner 1880 [Perciformes]
  • Neatrypa [Atrypidae]
  • Neaxon, Kullmann 1965 [Laccophyllidae]
  • Neaxonella, Weyer 1978 [Laccophyllidae]
  • Nebenothyris [Elythidae]
  • Nebespecha [Nassellaria]
  • Nebidella, Rasetti 1972 [Redlichiida]
  • Nebraskacrinus, Moore 1939 [Blothrocrinidae]
  • Nebraskites [Acanthoceratidae]
  • Nebris, Cuvier and Valenciennes 1830 [Perciformes]
  • Nebrius, Rüppell 1837 [Ginglymostomatidae]
  • Nebroceras [Orthocerida]
  • Nebrodites [Simoceratidae]
  • Nebularia, Swainson 1840 [Mitridae]
  • Neckajatia [Palaeocopida]
  • Neckajella [Palaeocopida]
  • Necklania [Antipleuridae]
  • Necrateria [Podocopida]
  • Necrocarcinus, Bell 1863 [Necrocarcinidae]
  • Necrogammarus [Pterygotidae]
  • Necronectes, A. Milne-Edwards 1881 [Portunidae]
  • Necroteuthis [Teuthida]
  • Neepaliphyllum [Anthozoa]
  • Neeyambaspis [Pteraspidomorphi]
  • Nefocoenia, Oppenheim 1930 [Faviidae]
  • Nefophyllia, Wells 1937 [Meandrinidae]
  • Negaprion, Whitley 1940 [Carcharhinidae]
  • Negebites, A. Parnes 1962 [Hungaritidae]
  • Negevodus, Mazin 1986 [Placodontia]
  • Negramithyris [Muirwoodellidae]
  • Nehanniaspis, Fritz 1972 [Trilobita]
  • Nehdentomis [Myodocopida]
  • Neilo, Adams 1854 [Malletiidae]
  • Neiloides [Nuculida]
  • Neimongolella [Rhynchonellata]
  • Neithea, Drouet 1825 [Pectinidae]
  • Neithella [Pterioida]
  • Neitheops, Stewart 1930 [Pterioida]
  • Nejdia [Hildoceratidae]
  • Nekewis [Neogastropoda]
  • Nekhoroshevia [Trigonirhynchiidae]
  • Nekhoroshoviella [Trepostomida]
  • Nekvasilovela [Laqueidae]
  • Nekvasilovella [Brachiopoda]
  • Neliella [Cheilostomata]
  • Nellia, Busk 1852 [Quadricellariidae]
  • Nelltia, L. W. Stephenson 1953 [Tellinidae]
  • Neltneria, Hupe 1952 [Neltneriidae]
  • Nelumbia [Demospongea]
  • Nelumbifolium, Wu 1990 [Cribrospongiidae]
  • Nemacanthclema [Cryptostomata]
  • Nemagraptus [Graptoloidea]
  • Nemaster, Clark [Comatulida]
  • Nemataxidra [Fenestrata]
  • Nemataxis [Cryptostomata]
  • Nematifera [Cyclostomata]
  • Nematinion, Hinde [Demospongea]
  • Nematoda, phylum, Rudolphi 1808 [Nematoidea]
  • Nematonotus, Woodward 1899 [Actinopterygii]
  • Nematopora [Arthrostylidae]
  • Nematoporella [Cheilostomata]
  • Nematoptychius, Traquair 1875 [Palaeoniscidae]
  • Nematosalpinx [Aphrosalpingidae]
  • Nematotrypa [Nematotrypidae]
  • Nemertina, phylum [Metazoa]
  • Nemesa [Septalariidae]
  • Nemetia [Cardiida]
  • Nemistium, Smith 1928 [Lithostrotionidae]
  • Nemocardium, Meek 1876 [Cardiidae]
  • Nemocardium (Lyrocardium) (Meek 1876) [Cardiidae]
  • Nemoceratina [Podocopida]
  • Nemodon, Conrad 1869 [Parallelodontidae]
  • Nemuniella [Palaeocopida]
  • Neoacarinina [Foraminifera]
  • Neoacrocephalites [Ptychopariida]
  • Neoagnostus, Kobayashi 1955 [Agnostidae]
  • Neoalbaillella, Takemura and Nakaseko 1981 [Albaillellidae]
  • Neoanomocerella [Ptychopariida]
  • Neoaparchites [Palaeocopida]
  • Neoarchaediscus [Archaediscidae]
  • Neoarchaeocrinus, Strimple 1955 [Diplobathrida]
  • Neoarchaesphaera [Foraminifera]
  • Neoaspongophyllum [Anthozoa]
  • Neobactrotheca [Orthothecida]
  • Neobairdia [Podocopida]
  • Neobeatricea, Rukhin 1938 [Actinodictyidae]
  • Neobelemnella [Belemnitida]
  • Neobelinuropsis [Xiphosurida]
  • Neobernaya [Neotaenioglossa]
  • Neoberounella [Podocopida]
  • Neobeyrichia [Palaeocopida]
  • Neobibolites [Cephalopoda]
  • Neobistrialites [Nautilida]
  • Neobothriocidaris [Bothriocidaroida]
  • Neobouchardia [Bouchardiidae]
  • Neobrachyelasma, Nikolaeva 1960 [Streptelasmatidae]
  • Neobrunsiina [Foraminifera]
  • Neobulimina [Foraminifera]
  • Neoburmesia [Pholadomyidae]
  • Neobythites, Goode and Bean 1885 [Ophidiiformes]
  • Neocaeniopsis, Alloiteau 1957 [Pachyphyllidae]
  • Neocamtocrinus [Monobathrida]
  • Neocantrilla [Anthozoa]
  • Neocaprina, Plenicar 1961 [Caprinidae]
  • Neocardioceras [Acanthoceratidae]
  • Neocarpenteria [Foraminifera]
  • Neocassandra, Daniltshenko 1968 [Myctophiformes]
  • Neocatacrinus, Knapp 1969 [Cladida]
  • Neocatillocrinus, Wanner 1937 [Crinoidea]
  • Neocatopygus [Pliolampadidae]
  • Neocaudites, Puri 1960 [Trachyleberididae]
  • Neocavitella [Conodontophorida]
  • Neoceras [Oncocerida]
  • Neochetoceras [Oppeliidae]
  • Neochilina [Amphissitidae]
  • Neochilonorria, Rusconi 1953 [Corynexochida]
  • Neochonetes, Muir-Wood 1962 [Rugosochonetidae]
  • Neocirpa [Rhynchonellidae]
  • Neocladiscites, Y. N. Popov 1961 [Cladiscitidae]
  • Neoclavulina [Foraminifera]
  • Neoclissiophyllum [Anthozoa]
  • Neoclypites, L. F. Spath 1951 [Noritidae]
  • Neocobboldia, Rasetti 1952 [Calodiscidae]
  • Neocoelia [Athyridida]
  • Neocoenia, Hackemesser 1936 [Placocoeniidae]
  • Neocola [Buccinidae]
  • Neocoleodus [Conodontophorida]
  • Neocolonograptus [Graptoloidea]
  • Neocolumbites, Y. Zacharov 1968 [Columbitidae]
  • Neocolumnaria, Soshkina 1949 [Neocolumnariidae]
  • Neocomites, Uhlig 1905 [Neocomitidae]
  • Neoconularia [Conulariidae]
  • Neocosmoceras [Cephalopoda]
  • Neocramatia [Eocramatiidae]
  • Neocrania, Lee and Brunton 1986 [Craniidae]
  • Neocraspedites, Spath 1923 [Polyptychitidae]
  • Neocrassina, Fischer 1887 [Astartidae]
  • Neocraterellina [Podocopida]
  • Neocribrella [Foraminifera]
  • Neocrioceras [Diplomoceratidae]
  • Neocucullograptus [Graptoloidea]
  • Neocybium, Leriche 1906 [Perciformes]
  • Neocycloceras, Flower and Caster 1935 [Pseudorthoceratidae]
  • Neocylindrites [Cephalaspida]
  • Neocylindrus [Olividae]
  • Neocypricardinia, Liu 1976 [Permophoridae]
  • Neocyprideis [Podocopida]
  • Neocyrtolites [Cyrtolitidae]
  • Neocystiphyllum, Wedekind 1927 [Lykophyllidae]
  • Neocythere [Podocopida]
  • Neocytheretta [Podocopida]
  • Neodadocrinus [Millericrinida]
  • Neodelthyris [Hysterolitidae]
  • Neodexiospira [Serpulimorpha]
  • Neodicellograptus [Graptoloidea]
  • Neodichocrinus, Wanner 1937 [Monobathrida]
  • Neodimorphoceras, Schmidt 1925 [Neodimorphoceratidae]
  • Neodiplograptus [Graptoloidea]
  • Neodiscocyclina [Foraminifera]
  • Neodiscosorus [Discosorida]
  • Neodiversograptus [Graptoloidea]
  • Neodrepanella, Zaspelova 1952 [Drepanellidae]
  • Neoeponides, Reiss 1960 [Discorbidae]
  • Neoflabellina [Foraminifera]
  • Neofletcheriella, Lin 1975 [Fletcheriellidae]
  • Neofusulina [Foraminifera]
  • Neofusulinella, Deprat 1912 [Schubertellidae]
  • Neogaimardia, Odhner 1924 [Gaimardiidae]
  • Neogastroplites [Hoplitidae]
  • Neogastropoda, order, Thiele 1929 [Gastropoda]
  • Neogauthiericeras [Collignoniceratidae]
  • Neogeoceras, Ruzhencev 1947 [Medlicottiidae]
  • Neoglaphyrites, Ruzhencev 1938 [Bisatoceratidae]
  • Neoglobator [Holectypoida]
  • Neoglobithyris [Rhipidiothyrididae]
  • Neogloboquadrina [Globorotaliidae]
  • Neoglyphioceras, Brüning 1923 [Neoglyphioceratidae]
  • Neoglytoxoceras [Cephalopoda]
  • Neognathodus [Conodontophorida]
  • Neogondolella [Gondolellidae]
  • Neogoniatites, Ruzhencev and Bogoslovskaya 1970 [Goniatitidae]
  • Neogothograptus [Retiolitidae]
  • Neograhamites [Kossmaticeratidae]
  • Neoguadalupia, Zhang 1987 [Colospongiidae]
  • Neoguraleus, Powell 1939 [Turridae]
  • Neogyroidina [Foraminifera]
  • Neohalecopsis, Weiler 1928 [Gonorhynchiformes]
  • Neoharpoceras [Brancoceratidae]
  • Neohedinaspis, Xiang and Zhang 1984 [Ptychopariida]
  • Neohibolites [Belemnitida]
  • Neohindia [Demospongea]
  • Neohoploceras, Spath 1939 [Neocomitidae]
  • Neoicoceras, Hyatt 1900 [Neoicoceratidae]
  • Neoimbricaria, Ihering 1907 [Volutomitridae]
  • Neoinoceramus, Ihering 1902 [Inoceramidae]
  • Neoiraqia [Foraminifera]
  • Neoisorophusella, Kammer et al. 1987 [Agelacrinitidae]
  • Neojanacus [Neotaenioglossa]
  • Neokaipingoceras, Obata 1940 [Cephalopoda]
  • Neokarpinskia [Karpinskiidae]
  • Neokeyserlingophyllum [Anthozoa]
  • Neokjaerina [Leptostrophiidae]
  • Neokloedenella [Palaeocopida]
  • Neokoninckophyllum, Fomichev 1939 [Aulophyllidae]
  • Neokunmingella, Chang 1974 [Archaeocopida]
  • Neokyphophyllum, Spasskiy 1965 [Kyphophyllidae]
  • Neolageniocrinus, Arendt 1970 [Cladida]
  • Neolatirus, Bellardi 1884 [Fasciolariidae]
  • Neolenticulina [Foraminifera]
  • Neolepas, Newman [Scalpellidae]
  • Neolepton, Monterosato 1875 [Neoleptonidae]
  • Neolimulus [Xiphosurida]
  • Neolioceratoides [Hildoceratidae]
  • Neoliothyrina [Sellithyrididae]
  • Neolissoceras, Spath 1923 [Haploceratidae]
  • Neolobites, Fisher 1882 [Engonoceratidae]
  • Neolobograptus [Graptoloidea]
  • Neoloculicyathus [Archaeocyathida]
  • Neololigosepia [Teuthida]
  • Neoloricata, order, Bergenhayn 1955 [Polyplacophora]
  • Neomantelliceras [Cephalopoda]
  • Neomanticoceras, Schindewolf 1936 [Gephuroceratidae]
  • Neomegalodon, Guembel 1864 [Megalodontidae]
  • Neometabolipa, Godefroid 1974 [Gypidulidae]
  • Neometacanthus, Richter 1984 [Phacopida]
  • Neomicroceras [Echioceratidae]
  • Neomicrorbis [Serpulimorpha]
  • Neomiodon [Neomiodontidae]
  • Neomiodonoides [Cardiida]
  • Neomisellina [Foraminifera]
  • Neomonoceratina [Podocopida]
  • Neomorphoceras [Cephalopoda]
  • Neomorphotis [Heteropectinidae]
  • Neomphyma, Soshkina 1937 [Ptenophyllidae]
  • Neomultioistodus [Conodontophorida]
  • Neomultithecopora, Lin 1963 [Multithecoporidae]
  • Neonerinea [Heterostrophia]
  • Neonesidea [Podocopida]
  • Neontolium [Pterioida]
  • Neonyhamnella [Podocopida]
  • Neooctonaria [Podocopida]
  • Neopachycormus [Pachycormiformes]
  • Neopagetina, Pokrovskaya 1960 [Hebediscidae]
  • Neopaliphyllum, Zheltonogova 1961 [Paliphyllidae]
  • Neopanderodus [Conodontophorida]
  • Neoparadainella [Foraminifera]
  • Neopauxillites [Hyolithida]
  • Neopelta [Demospongea]
  • Neopeltis, Zhang 1983 [Asaphida]
  • Neopericyclus, Popov 1965 [Pericyclidae]
  • Neopetalichthys, Liu 1973 [Petalichthida]
  • Neopetrozium [Anthozoa]
  • Neopharciceras, Bogoslovsky 1955 [Pharciceratidae]
  • Neophlycticeras, Spath 1922 [Lyelliceratidae]
  • Neophoca, Gray 1866 [Otariidae]
  • Neopholidophoropsis [Pachycormiformes]
  • Neophrecythere [Podocopida]
  • Neophylloceras, Shimizu 1934 [Phylloceratidae]
  • Neopilumnoplax [Decapoda]
  • Neoplanorbulinella [Foraminifera]
  • Neoplatycephalus, Castelnau 1872 [Scorpaeniformes]
  • Neoplatycrinus [Platycrinitidae]
  • Neoplatytaichum [Archaeogastropoda]
  • Neopleurofusia [Neogastropoda]
  • Neopopanoceras, L. F. Spath 1951 [Procarnitidae]
  • Neoprimitiella [Palaeocopida]
  • Neoprobolium, Struve 1985 [Dalmanitidae]
  • Neoproetus, Tesch 1923 [Phillipsiidae]
  • Neopronorites, Ruzhencev 1936 [Pronoritidae]
  • Neoproraster [Spatangoida]
  • Neoprotencrinus, Knapp 1969 [Cladida]
  • Neoprotrachyceras, L. Krystyn 1978 [Trachyceratidae]
  • Neoptychites, Kossmat 1895 [Vascoceratidae]
  • Neoptyxis [Heterostrophia]
  • Neopulchellia [Cephalopoda]
  • Neopycnodonte, Stenzel 1971 [Gryphaeidae]
  • Neoradiolites [Radiolitidae]
  • Neorbitolinopsis [Foraminifera]
  • Neoredlichia, Saito 1936 [Redlichiida]
  • Neoretenoa [Cyclostomata]
  • Neoreteporina [Fenestrata]
  • Neorhombolepis, Woodward 1888 [Furidae]
  • Neorhynchula [Atrypinidae]
  • Neoroemeria, Radugin 1938 [Thecostegitidae]
  • Neorotalia [Foraminifera]
  • Neorthoceras, Shimizu and Obata 1936 [Orthocerida]
  • Neosaynoceras [Flickiidae]
  • Neoscalpellum, Pilsbry 1907 [Scalpellidae]
  • Neoschisma, J. Wanner 1924 [Neoschismatidae]
  • Neoschizodus, Giebel 1855 [Myophoriidae]
  • Neoschizophoria [Schizophoriidae]
  • Neoschmidtella [Palaeocopida]
  • Neoschubertella [Foraminifera]
  • Neosciadiocapsa, Pessagno 1969 [Neosciadiocapsidae]
  • Neoscombrops, Gilchrist 1922 [Perciformes]
  • Neoselwynoceras [Cephalopoda]
  • Neosemantis, Popofsky 1913 [Plagiacanthidae]
  • Neoshirakiella, Sun and Xiang 1979 [Ptychopariida]
  • Neoshumardites, Ruzhencev 1936 [Somoholitidae]
  • Neosichuanoceras [Orthocerida]
  • Neosilesites [Silesitidae]
  • Neosimnia [Ovulidae]
  • Neosirenites, Y. N. Popov 1961 [Trachyceratidae]
  • Neosolenopleurella, Ju 1983 [Ptychopariida]
  • Neospathodus [Gondolellidae]
  • Neospirifer, Fredericks 1919 [Trigonotretidae]
  • Neospirigerina [Atrypinidae]
  • Neospongophylloides, Jia 1977 [Endophyllidae]
  • Neostaffella [Fusulinoidea]
  • Neostlingoceras, Klinger and Kennedy 1978 [Turrilitidae]
  • Neostrabops, Caster and Macke 1952 [Strabopidae]
  • Neostreptognathodus [Conodontophorida]
  • Neostringophylloides [Anthozoa]
  • Neostrophia [Camerellidae]
  • Neosyringopora, Sokolov 1955 [Gorskyitidae]
  • Neosyringostroma, Kazmierczak 1971 [Stromatoporidae]
  • Neotabularia, Ivaniya 1968 [Stauriidae]
  • Neotaenicephalus, Kobayashi 1955 [Ptychopariida]
  • Neotaenioglossa, order, Haller 1882 [Gastropoda]
  • Neotapes [Cardiida]
  • Neotemnophyllum [Anthozoa]
  • Neothecidella [Thecideidae]
  • Neothlipsura [Podocopida]
  • Neothyris, Douville 1879 [Terebratellidae]
  • Neotibetites, Krumbeck 1913 [Tibetitidae]
  • Neotrapezium, Habe 1951 [Trapezidae]
  • Neotrematopora [Trepostomida]
  • Neotreta, Sobolev 1976 [Acrotretidae]
  • Neotrigonia, Cossmann 1912 [Trigoniidae]
  • Neotrochaetaeon [Cephalaspida]
  • Neotryplasma, Kaljo 1957 [Tryplasmatidae]
  • Neotsitrella [Palaeocopida]
  • Neouddenites, Ruzhencev 1961 [Uddenitinae]
  • Neoulrichia [Beyrichiidae]
  • Neouvigenna [Foraminifera]
  • Neovallupus, Yang and Pessago 1989 [Pantanelliidae]
  • Neoveenia [Podocopida]
  • Neovenerella [Cardiida]
  • Neovenericor [Cardiida]
  • Neovepresiphyllum, Jia 1977 [Spongophyllidae]
  • Neovermilia [Serpulimorpha]
  • Neowormsipora, Lin and Chow 1977 [Plasmoporellidae]
  • Neoyanguania [Productidae]
  • Neozaphrentis, Grove 1935 [Hapsiphyllidae]
  • Neozeacrinus, Wanner 1937 [Zeacrinitidae]
  • Neozeba [Neotaenioglossa]
  • Nepasitoechia [Rhynchotetradidae]
  • Nepea, Whitehouse 1939 [Nepeidae]
  • Nepheliospongia [Demospongea]
  • Nephelispongia [Hexactinellida]
  • Nephelophyllum, Wu and Zhao 1974 [Kepingophyllidae]
  • Nephokirkos [Podocopida]
  • Nephranops, Richter 1926 [Phacopidae]
  • Nephriticeras, Hyatt 1884 [Nephriticeratidae]
  • Nephriticerina, Foerste 1927 [Nephriticeratidae]
  • Nephrolenellus [Olenellidae]
  • Nephrolepidina [Foraminifera]
  • Nephropora [Cheilostomata]
  • Nephrops, Leach 1814 [Nephropidae]
  • Nephropsis [Nephropidae]
  • Nephrosphaera [Hemisphaeramminidae]
  • Nephrospyris [Nassellaria]
  • Nephthea, Audouin 1826 [Alcyonacea]
  • Nephtya [Alcyonacea]
  • Nepotilla [Neogastropoda]
  • Neptocarcinus, Lorenthey 1898 [Portunidae]
  • Neptunea, Röding 1798 [Neptuneidae]
  • Neptunoceras, Shimanskiy 1949 [Neptunoceratidae]
  • Neptunochelys, Weiland 1900 [Testudines]
  • Nereidavus [Eunicemorpha]
  • Nereidella [Paurorthidae]
  • Nereina [Neritidae]
  • Nereocrinus, Wanner 1924 [Cladida]
  • Nericia, Westgard 1948 [Ptychopariida]
  • Nericiaspis [Ptychopariida]
  • Nericodus [Conodontophorida]
  • Nerinatica, Olsson 1930 [Naticidae]
  • Nerinea, Deshayes 1827 [Nerineidae]
  • Nerinella [Heterostrophia]
  • Nerineopsis, Cossmann 1906 [Procerithiidae]
  • Nerineoptyxis [Heterostrophia]
  • Nerinoides [Nerineidae]
  • Nerita, Linnaeus 1758 [Neritidae]
  • Nerita (Amphinerita), Martens 1887 [Neritidae]
  • Nerita (Theliostyla), Mörch 1852 [Neritidae]
  • Neritaria, Koken 1892 [Neritariidae]
  • Neritina, Lamarck 1816 [Neritidae]
  • Neritoma, Morris 1949 [Neritidae]
  • Neritoplica [Archaeogastropoda]
  • Neritopsis, Grateloup 1832 [Neritopsidae]
  • Neritoptyx, Oppenheim 1892 [Neritopsidae]
  • Neritra [Cardiida]
  • Neritrema [Neotaenioglossa]
  • Nerophis, Rafinesque 1810 [Gasterosteiformes]
  • Nerthebrochus [Sellithyrididae]
  • Nervolites [Hyolithomorpha]
  • Nervophyllum, Vasilyuk 1959 [Aulophyllidae]
  • Nervostrophia [Leptostrophiidae]
  • Neseuretus, Hicks 1873 [Calymenidae]
  • Nesides [Coelacanthiformes]
  • Nesobornia [Cardiida]
  • Nessariostoma, Broili 1933 [Pseudopetalichthyida]
  • Nessariostoma [Placodermi]
  • Netastoma [Myoida]
  • Netrocytheridea [Podocopida]
  • Netschajewia, Licharew 1925 [Bivalvia]
  • Netschajewiana [Podocopida]
  • Nettastoma, Rafinesque 1810 [Anguilliformes]
  • Nettastomella [Myoida]
  • Netzkaina [Ostracoda]
  • Neuburgella, Kazantseva-Selentseva 1981 [Palaeonisciformes]
  • Neumanella [Strophodontidae]
  • Neumania [Clitambonitidae]
  • Neumatoceras, Foerste 1935 [Oncoceratidae]
  • Neumayrithyris [Terebratulida]
  • Neuquenenitrigonia [Trigoniida]
  • Neuqueniceras [Cephalopoda]
  • Neurograptus [Graptoloidea]
  • Neuropora, Bronn 1825 [Neuroporidae]
  • Neuropora [Cyclostomata]
  • Neuroporella [Cyclostomata]
  • Neusticosaurus, Seeley 1882 [Lariosauridae]
  • Nevadabolbina [Palaeocopida]
  • Nevadaecystis [Cornuta]
  • Nevadaphyllum, Stumm 1937 [Streptelasmatidae]
  • Nevadatubulus [Problematica]
  • Nevadella, Raw 1936 [Nevadiidae]
  • Nevadia, Walcott 1910 [Nevadiidae]
  • Nevadocoelia, Bassler 1927 [Anthaspidellidae]
  • Nevadocrinus [Sagenocrinida]
  • Nevadophyllites [Phylloceratitida]
  • Nevadotheca, Malinky 1988 [Hyolithidae]
  • Nevenulora, Iredale 1930 [Lucinidae]
  • Neverita, Risso 1826 [Naticidae]
  • Neverita (Hypterita), Woodring 1957 [Naticidae]
  • Nevianopora [Cyclostomata]
  • Nevillella [Foraminifera]
  • Newaagia, Hertlein 1952 [Terquemiidae]
  • Newberria [Stringocephalidae]
  • Newboldiceras, Thomel 1972 [Acanthoceratidae]
  • Newellia [Demospongea]
  • Newellipecten, Ruzicka et al. 1959 [Pectinida]
  • Newmarracarroceras [Sonniniidae]
  • Newportopora [Trepostomida]
  • Newsomella [Pterioida]
  • Newsomites [Pachydomellidae]
  • Nexocrinus, Eckert 1984 [Diplobathrida]
  • Nezamyslia [Palaeocopida]
  • Nezumia, Jordan and Starks 1904 [Macrouridae]
  • Nezzazata [Nezzazatidae]
  • Nezzazatinella, Darmoian 1976 [Nezzazatidae]
  • Nganasanella, Rozova 1963 [Aphelaspididae]
  • Niachangella [Proetida]
  • Niajuphyllum, Strelnikov 1973 [Kodonophyllidae]
  • Nibionia [Calcarea]
  • Nicaeotrochus, Barta-Calmus 1973 [Turbinoliidae]
  • Nicaisolopha, Vyalov 1936 [Ostreidae]
  • Nicania [Cardiida]
  • Nicaniella, Chavan 1945 [Astartidae]
  • Niceforoceras, Basse 1948 [Collignoniceratidae]
  • Nicella [Gorgonacea]
  • Nicema, Woodring 1964 [Buccinidae]
  • Nicholsonella [Trepostomida]
  • Nicholsoniella, Soshkina 1952 [Laccophyllidae]
  • Nicholsonograptus, Boucek and Pribyl 1951 [Graptoloidea]
  • Nicklesia, Hyatt 1903 [Pulchelliidae]
  • Nicklesopora, Bassler 1952 [Rhabdomesidae]
  • Nicolella, Reed 1917 [Productorthidae]
  • Nicolia [Neogastropoda]
  • Nicolina [Palaeocopida]
  • Nicoloidea, Zeng 1987 [Archaeorthidae]
  • Nicolorthis [Productorthidae]
  • Nicomedites, Toula 1896 [Beyrichitidae]
  • Nicoraella [Conodontophorida]
  • Nicosiaella, Conti and Fischer 1981 [Gastropoda]
  • Nidarica [Cardiida]
  • Nielsenicrinus [Isocrinida]
  • Nielsenoceras, Furnish 1966 [Paraceltitidae]
  • Nieszkowskia, Schmidt 1881 [Cheiruridae]
  • Nigerapana [Neogastropoda]
  • Nigeria [Podocopida]
  • Nigericeras, Schneegans 1943 [Acanthoceratidae]
  • Nigerinoplica [Productidae]
  • Nigerithium [Neotaenioglossa]
  • Nigeroloxoconcha [Podocopida]
  • Niigaella [Stenolaemata]
  • Nikatheca [Orthothecida]
  • Nikenautilus [Nautilida]
  • Nikiforopora [Stenoporidae]
  • Nikiforovaena [Adolfiidae]
  • Nikiforovella [Nikiforovellidae]
  • Nikitinella [Baisalinidae]
  • Nikitinella [Podocopida]
  • Nikolaevirhynchus [Ancistrorhynchidae]
  • Nikolarites [Cambroclavida]
  • Nilcgna [Ptychopariida]
  • Nileoides, Raymond 1920 [Asaphidae]
  • Nileus, Dalman 1827 [Nileidae]
  • Nilobia [Cardiida]
  • Nimbia [Cyclozoa]
  • Nina [Neotaenioglossa]
  • Ninadiscus, Korobov 1980 [Agnostida]
  • Ninaspis, Ivshin 1953 [Trilobita]
  • Ninella [Foraminifera]
  • Ningbingella [Pugnacidae]
  • Ninghuaphyllum [Anthozoa]
  • Ningkianolithus, Lu 1954 [Trinucleidae]
  • Ninglangothyris [Dielasmatidae]
  • Ningnanophyllum, Lin 1965 [Calostylidae]
  • Ningqiangolites, H.F. Chu 1975 [Heliolitidae]
  • Ningqiangophyllum, Ge and Yü 1974 [Arachnophyllidae]
  • Ningqiangsclerites [Problematica]
  • Ninocrinus, Castellana and Manni 1991 [Cyrtocrinida]
  • Niobe, Angelin 1851 [Asaphidae]
  • Niobella, Reed 1931 [Asaphidae]
  • Niobides, Harrington and Leanza 1957 [Asaphidae]
  • Niobina, Lake 1946 [Asaphidae]
  • Niobrara [Crossognathiformes]
  • Niobrarateuthis, Miller 1957 [Kelaenidae]
  • Nionella [Palaeocopida]
  • Niorhynx [Niorhynicidae]
  • Nipageroceras [Discosorida]
  • Nipponarges, Kaneko 1984 [Lichida]
  • Nipponaster [Echinarachniidae]
  • Nipponaster [Spatangoida]
  • Nipponicorbula [Corbulidae]
  • Nipponitella [Schwagerinidae]
  • Nipponites [Cephalopoda]
  • Nipponithyris, Yabe and Hatai 1934 [Dallinidae]
  • Nipponitrigonia [Trigoniidae]
  • Nipponitys [Neogastropoda]
  • Nipponocalymene, Kaneko 1985 [Phacopida]
  • Nipponolimopsis, Habe 1951 [Limopsidae]
  • Nipponomarcia [Cardiida]
  • Nipponophyllum, Sugiyama 1940 [Holmophyllidae]
  • Nipponstenopora [Trepostomida]
  • Nipteraxis [Heterostrophia]
  • Nipterella [Demospongea]
  • Nipterocrinus [Sagenocrinida]
  • Nisaclis [Neotaenioglossa]
  • Nisiturris [Heterostrophia]
  • Niso, Risso 1826 [Eulimidae]
  • Nisostomia [Heterostrophia]
  • Nisusia, Walcott 1905 [Nisusiidae]
  • Nitanoceras, F. H. McLearn 1937 [Megaphyllitidae]
  • Nitidavenus, H. E. Vokes 1939 [Veneridae]
  • Nitidella, Swainson 1840 [Columbellidae]
  • Nitidittellina [Cardiida]
  • Nitidocare, Pribyl and Vanek 1985 [Proetidae]
  • Nitidus [Hexactinosa]
  • Nitkovicepora [Anthozoa]
  • Nitoricornus [Hyolithida]
  • Niveria [Triviidae]
  • Nixonella, Lochman 1944 [Llanoaspididae]
  • Nobiliasaphus, Pribyl and Vanek 1965 [Asaphidae]
  • Nobilitella [Palaeocopida]
  • Nochoroicyathus [Ajacicyathida]
  • Nochoroiella, Pel'man 1983 [Obolellida]
  • Nocturnellia [Draboviidae]
  • Nodaea [Crassumbidae]
  • Nodambichilina [Palaeocopida]
  • Nodasperodiscus [Archaediscidae]
  • Nodella, Zaspelova 1952 [Drepanellidae]
  • Nodella [Sentosiidae]
  • Nodellum [Foraminifera]
  • Nodibeyrichia [Palaeocopida]
  • Nodiceps, Suvorova 1959 [Corynexochida]
  • Nodilittorina, von Martens 1897 [Littorinidae]
  • Nodiocoeloceras [Cephalopoda]
  • Nodipecten, Dall 1898 [Pectinidae]
  • Noditerebra [Terebridae]
  • Nodobacularia [Nubeculariidae]
  • Nodobaculariella, Cushman and Hanzawa 1937 [Cornuspiridae]
  • Nodoblastus [Spiraculata]
  • Nodobolivinella [Foraminifera]
  • Nodochernyshinella [Foraminifera]
  • Nodocosta, Gross 1940 [Acanthodii]
  • Nododelphinula, Cossmann 1916 [Nododelphinulidae]
  • Nodogenerina [Foraminifera]
  • Nodognathus [Conodontophorida]
  • Nodogordiospira [Cornuspiridae]
  • Nodoinvolutaria [Ichthyolariidae]
  • Nodomorphina [Nodosariidae]
  • Nodonchus, White 1961 [Acanthodii]
  • Nodonychia [Pterioida]
  • Nodophthalmidium, Macfadyen 1939 [Nubeculariidae]
  • Nodophthalmocythere [Podocopida]
  • Nodophyllum, Kaplan 1971 [Holmophyllidae]
  • Nodoprosopon, K. Beurlen 1928 [Nodoprosopidae]
  • Nodosageceras, Ruzhencev 1956 [Medlicottiidae]
  • Nodosarchaediscus [Foraminifera]
  • Nodosarella [Foraminifera]
  • Nodosaria, Lamarck 1812 [Nodosariidae]
  • Nodosinella [Nodosinellidae]
  • Nodosinelloides [Geinitzinidae]
  • Nodosoclymenia, Czarnocki 1989 [Platyclymeniidae]
  • Nodosohoplites [Cephalopoda]
  • Nodotetraedra [Pyramispongiidae]
  • Nodotibetites, Zhao and Wang 1973 [Tibetitidae]
  • Nodulipora, Lindström 1873 [Desmidoporidae]
  • Nodulus [Neotaenioglossa]
  • Noelaspis, Ludvigsen and Westrop 1989 [Idahoiidae]
  • Noetca, Stewart 1926 [Cephalaspida]
  • Noetia, Gray 1857 [Noetiidae]
  • Noetiella [Arcida]
  • Noetlingaster [Stomechinidae]
  • Noetlingia [Decapoda]
  • Noetlingia [Porambonitidae]
  • Noetlingites, A. Hyatt 1900 [Longobarditidae]
  • Nogamiconus [Conodonta]
  • Nolaniceras [Cephalopoda]
  • Nolfophidion, Schwarzhans 1980 [Ophidiiformes]
  • Nomadinis, Opik 1967 [Asaphida]
  • Nomismoceras, J. J. Sepkoski 2002 [Nomismoceratidae]
  • Nonacteonina (L. W. Stephenson 1941) [Acteonidae]
  • Nonion, Monfort 1808 [Nonionidae]
  • Nonionella, Cushman 1926 [Nonionidae]
  • Nonionelleta [Foraminifera]
  • Nonionellina [Foraminifera]
  • Nonix, Lane 1984 [Lichida]
  • Nonparactocrinus [Crinoidea]
  • Nonsukozona [Palaeocopida]
  • Nonurocythereis [Podocopida]
  • Nophrecythere [Podocopida]
  • Noramya, Casey 1961 [Cucullaeidae]
  • Norcottia [Foraminifera]
  • Nordastrea [Anthozoa]
  • Nordella [Reticulariidae]
  • Nordenskjoeldaster [Holasteroida]
  • Nordenskjoeldia, Wilckens 1910 [Parallelodontidae]
  • Nordiceras, Bogoslovsky 1955 [Nordiceratidae]
  • Nordiodus [Conodontophorida]
  • Nordispirifer [Cyrtospiriferidae]
  • Nordophiceras, Y. D. Popov 1961 [Meekoceratidae]
  • Nordotoechia [Hebetoechiidae]
  • Noridiscites, L. F. Spath 1951 [Noridiscitidae]
  • Norina [Trilobita]
  • Norinia, Troedsson 1937 [Asaphidae]
  • Norites, E. v. Mojsisovics 1869 [Noritidae]
  • Normalograptus [Normalograptidae]
  • Normanicythere [Podocopida]
  • Normannites [Otoitidae]
  • Norochilina [Palaeocopida]
  • Norrisella [Archaeogastropoda]
  • Norrisia [Archaeogastropoda]
  • Northia, Gray 1847 [Buccinidae]
  • Nortonechinus [Archaeocidaridae]
  • Norwoodella, Resser 1938 [Norwoodiidae]
  • Norwoodia, Walcott 1916 [Norwoodiidae]
  • Nostoceras, Hyatt 1894 [Nostoceratidae]
  • Nostolepis, Pander 1856 [Climatiiformes]
  • Nostrocyathus [Porifera]
  • Notabilitus [Hyolithida]
  • Notacanthus, Bloch 1788 [Anguilliformes]
  • Notacirsa [Neotaenioglossa]
  • Notadusta [Cypraeidae]
  • Notamia [Cheilostomata]
  • Notanoplia, Gill 1950 [Spiriferida]
  • Notasaphus, Gregory 1903 [Corynexochida]
  • Notesthes, Ogilby 1904 [Scorpaeniformes]
  • Nothamusium [Mollusca]
  • Nothaphrophyllum, Pickett 1967 [Aphrophyllidae]
  • Nothia [Bathysiphonidae]
  • Nothocephalites [Macrocephalitidae]
  • Nothoceras, Barrande 1856 [Nothoceratidae]
  • Nothorthis, Ulrich and Cooper 1938 [Archaeorthidae]
  • Nothosaurops, Leidy 1870 [Sauropterygia]
  • Nothosaurus, Mnster 1834 [Nothosauridae]
  • Nothosporadoceras, Bogoslovsky 1971 [Sporadoceratidae]
  • Nothostephanus [Cephalopoda]
  • Nothozoe [Thylacocephala]
  • Nothrites [Eunicemorpha]
  • Notidanodon, Cappetta 1975 [Hexanchidae]
  • Notiobolus [Obolidae]
  • Notiochonetes [Chonetidae]
  • Notiocrinus, Wanner 1924 [Cladida]
  • Notirus, H.J. Finlay 1928 [Cardiida]
  • Notoacmea, Iredale 1915 [Lottiidae]
  • Notoaphelaspis, Powell et al. 1982 [Asaphida]
  • Notobalanus [Cirripedia]
  • Notoblastus, I. A. Brown 1941 [Neoschismatidae]
  • Notobotula [Mytilida]
  • Notocallista, Iredale 1924 [Veneridae]
  • Notocaris [Mysidacea]
  • Notocarpos [Mitrata]
  • Notoceras [Cephalopoda]
  • Notochione, Hertlein and Strong 1948 [Veneridae]
  • Notochlamy [Pterioida]
  • Notocidaris [Ctenocidaridae]
  • Notocirrus [Eunicemorpha]
  • Notoconchidium [Hebetoechiidae]
  • Notoconorbina [Foraminifera]
  • Notocrater, Finlay 1927 [Cocculinidae]
  • Notocrinus, Mortenson 1917 [Comatulida]
  • Notocyathus, Tenison-Woods 1880 [Caryophylliidae]
  • Notocycloceras, Teichert and Glenister 1954 [Protocycloceratidae]
  • Notocypraea [Neotaenioglossa]
  • Notocytharella [Neogastropoda]
  • Notocythere [Podocopida]
  • Notodonax, Feruglio 1935 [Donacidae]
  • Notogenota [Neogastropoda]
  • Notogoneus, Cope 1885 [Gonorhynchidae]
  • Notogrammatodon, Maxwell 1966 [Parallelodontidae]
  • Notohaliotis [Archaeogastropoda]
  • Notolepis, Dollo 1908 [Aulopiformes]
  • Notoleptaena, Gill 1950 [Rafinesquinidae]
  • Notolimea, Iredale 1924 [Limidae]
  • Notolimopsis, Maxwell 1969 [Limopsidae]
  • Notoluponia [Neotaenioglossa]
  • Notomella, Cotton 1957 [Fissurellidae]
  • Notomithrax, Griffin 1963 [Majidae]
  • Notonucula [Nuculida]
  • Notopaphia [Cardiida]
  • Notoparmella, Johnson 1973 [Spiriferida]
  • Notopeltis, Harrington and Leanza 1957 [Asaphidae]
  • Notopeplum, Finlay 1927 [Volutidae]
  • Notopetalichthys, Woodward 1941 [Petalichthida]
  • Notoplagioecia [Cyclostomata]
  • Notoplanulina [Foraminifera]
  • Notoplax, H. Adams 1861 [Acanthochitonidae]
  • Notoplejona [Volutidae]
  • Notopocorystes, McCoy 1849 [Palaeocorystidae]
  • Notopoides, Henderson 1888 [Palaeocorystidae]
  • Notopus, De Haan 1841 [Palaeocorystidae]
  • Notorhynchus, Ayres 1855 [Hexanchidae]
  • Notorotalia, Finlay 1939 [Nonionidae]
  • Notorthisina [Euorthisinidae]
  • Notosaria [Notosariidae]
  • Notoscabrotrigonia [Trigoniida]
  • Notoscapha [Palaeocopida]
  • Notoscaphidia [Finkelnburgiidae]
  • Notosceles, Bourne 1922 [Palaeocorystidae]
  • Notoscopelus, Guenther 1864 [Myctophidae]
  • Notoscrobs [Barleeidae]
  • Notosetia [Neotaenioglossa]
  • Notosinister [Neotaenioglossa]
  • Notostomus, Milne-Edwards 1881 [Oplophoridae]
  • Notostrea, Finlay 1928 [Ostreidae]
  • Nototeredo, Bartsch 1923 [Teredinidae]
  • Nototrigonia [Trigoniida]
  • Nototrivia [Neotaenioglossa]
  • Notovola [Pterioida]
  • Notovoluta, Cotton 1946 [Volutidae]
  • Nouria [Foraminifera]
  • Novaculaperma [Pterioida]
  • Novakella, Whittard 1961 [Cyclopygidae]
  • Novakina [Ostracoda]
  • Novalesia [Foraminifera]
  • Novaspis, Whittington 1941 [Trinucleidae]
  • Novathaca [Cardiida]
  • Novella [Foraminifera]
  • Novellinetes [Strophochonetidae]
  • Novichuskia [Anthozoa]
  • Noviportia [Palaeocopida]
  • Novitatus [Orthothecida]
  • Novitella, Bogoyavlenskaya 1984 [Amphiporidae]
  • Novobolbina [Palaeocopida]
  • Novocypris [Podocopida]
  • Novogladites [Palaeocopida]
  • Novozemelia, Cherkesova 1973 [Gypidulidae]
  • Nowakia, Gurich 1896 [Nowakiidae]
  • Nowakites [Pachydiscidae]
  • Nozamichthys, Schultze and Bardack 1987 [Palaeonisciformes]
  • Nozeba, Iredale 1915 [Iravadiidae]
  • Nubecularia [Nubeculariidae]
  • Nubialba [Christianiidae]
  • Nucella [Muricidae]
  • Nucha [Nuchidae]
  • Nucia, Dana 1852 [Leucosiidae]
  • Nucilobus, Morris and Collins 1991 [Leucosiidae]
  • Nucites [Discosorida]
  • Nucleata, Quenstedt 1868 [Nucleatidae]
  • Nucleatina [Cnismatocentridae]
  • Nucleatula [Dielasmatidae]
  • Nucleocrinus, T. A. Conrad 1842 [Spiraculata]
  • Nucleolina [Podocopida]
  • Nucleopsis, Conrad 1865 [Cephalaspida]
  • Nucleorhynchia [Triplesiidae]
  • Nucleurus, Ramskold 1986 [Encrinuridae]
  • Nucula, Lamarck 1799 [Nuculidae]
  • Nuculana, Link 1807 [Nuculanidae]
  • Nuculavus, Tschernyschev 1943 [Nuculidae]
  • Nuculoceras, Bisat 1924 [Cravenoceratidae]
  • Nuculoida, order, Dall 1889 [Protobranchia]
  • Nuculoidea, Williams and Berger 1916 [Nuculidae]
  • Nuculoma, Cossmann 1907 [Nuculidae]
  • Nucunella, d'Orbigny 1849 [Limopsidae]
  • Nudangarita [Archaeogastropoda]
  • Nudarchaediscus [Foraminifera]
  • Nudechinus, Clark 1912 [Toxopneustidae]
  • Nudista [Palaeocopida]
  • Nudivagus [Cerithiidae]
  • Nudobrissus [Spatangoida]
  • Nudonychocella [Cheilostomata]
  • Nudymia [Productellidae]
  • Nudymiella [Cryptostomata]
  • Nugnecella [Orthida]
  • Nuguschella [Verneuiliidae]
  • Nuguschia [Podocopida]
  • Numella, Iredale 1924 [Ungulinidae]
  • Numericoma, Popov 1980 [Ephippelasmatidae]
  • Nummicrinus [Sagenocrinida]
  • Nummoceras, Ruzhencev and Bogoslovskaya 1971 [Ferganoceratidae]
  • Nummodiscorbis [Foraminifera]
  • Nummofallotia [Meandropsinidae]
  • Nummoloculina [Hauerinidae]
  • Nummotectus [Archaeogastropoda]
  • Nummulites, Lamarck 1801 [Nummulitidae]
  • Nunnacrinus, Bowsher 1955 [Monobathrida]
  • Nuratadictyon [Stromatoporoidea]
  • Nurataella [Cyrtiidae]
  • Nuria [Anazygidae]
  • Nurochonetes [Chonetidae]
  • Nursallia, Blot 1987 [Nursallidae]
  • Nushbiella [Siphonotretidae]
  • Nutricola, F. R. Bernard 1982 [Veneridae]
  • Nuttallia, Dall 1900 [Psammobiidae]
  • Nuttallides [Foraminifera]
  • Nuttallina, Dall 1871 [Neoloricata]
  • Nuttallinella [Foraminifera]
  • Nuttallus [Foraminifera]
  • Nuxocrinus, Mclntosh 1983 [Cladida]
  • Nyaya, Rozova 1963 [Hystricuridae]
  • Nybelinoides, Taverne 1982 [Osmeriformes]
  • Nybyoceras, Troedsson 1926 [Armenoceratidae]
  • Nyctocrinus, Springer 1926 [Diplobathrida]
  • Nyctopora, Nicholson 1879 [Syringophyllidae]
  • Nyege [Plectorhynchellidae]
  • Nyella, Palmer 1979 [Ptychopariidae]
  • Nyhamnella [Platycopida]
  • Nymphaeoblastus, H. Von Peetz 1907 [Phaenoschismatidae]
  • Nymphalucina, Speden 1970 [Lucinidae]
  • Nymphograptus [Graptoloidea]
  • Nymphorhynchia [Trigonirhynchiidae]
  • Nyuella [Helcionellidae]
  • Oamaruia [Neogastropoda]
  • Oanduella [Cryptostomata]
  • Oanduellina [Cryptostomata]
  • Oberhauserella [Foraminifera]
  • Obesacapsula, Pessagno 1977 [Spongocapsulidae]
  • Obesaria [Reticulariidae]
  • Obex, Iredale 1925 [Buccinidae]
  • Obexomia [Heterostrophia]
  • Obinautilus, Kobayashi 1954 [Nautilidae]
  • Obisafitella [Podocopida]
  • Oblada, Cuvier 1829 [Perciformes]
  • Obliaspis [Pteraspidomorphes]
  • Obliquatheca [Exilithecida]
  • Obliquina [Foraminifera]
  • Obliquipecten, Hind 1903 [Chaenocardiidae]
  • Obliquisylthis [Palaeocopida]
  • Obliquostoma [Cheilostomata]
  • Oblisicornus [Hyolithida]
  • Oblitacythereis [Podocopida]
  • Obliteraspis, Ogienko 1984 [Pliomeridae]
  • Oblongarcula [Terebrataliidae]
  • Oblongiprion [Eunicemorpha]
  • Oboedalites [Hyolithida]
  • Obolellida, order, Rowell 1965 [Obolellata]
  • Obolopsis, Saito 1936 [Obolidae]
  • Obolorugia [Obolorugidae]
  • Obolus, Eichwald 1829 [Obolidae]
  • Obornella [Archaeogastropoda]
  • Obotrita [Palaeocopida]
  • Obovothyris [Zeilleriidae]
  • Obrimia [Pholadomyida]
  • Obrucheviaspis, Ivshin 1953 [Ptychopariida]
  • Obrutchevites, M. N. Vavilov 1977 [Ceratitida]
  • Obscurella [Ancistrorhynchidae]
  • Obsoletes [Schwagerinidae]
  • Obsoletirhynchia, Shi 1992 [Tetrarhynchiidae]
  • Obtortio, Hedley 1899 [Diastomatidae]
  • Obturamentella, Amsden 1958 [Obturamentellidae]
  • Obtusella, Cossmann 1921 [Rissoidae]
  • Obtusicostites [Cephalopoda]
  • Occidentoschwagerina [Fusulinoidea]
  • Occlusacythereis [Podocopida]
  • Occulocytheropteron [Podocopida]
  • Occultocystis [Mitrata]
  • Occultocythereis [Podocopida]
  • Oceanodroma, Reichenbach 1950 [Procellariiformes]
  • Ocellaria [Demospongea]
  • Ocenebra, Leach in Gray 1847 [Muricidae]
  • Ochesaarina [Palaeocopida]
  • Ochesaarina [Ostracoda]
  • Ochescapha [Palaeocopida]
  • Ochetoceras [Oppeliidae]
  • Ochetochilus [Neotaenioglossa]
  • Ochetosella, Canu and Bassler 1917 [Romancheinidae]
  • Ochetosellina [Cheilostomata]
  • Ochotoceras [Hildoceratidae]
  • Ochotochlamys [Pectinidae]
  • Ocinebrellus [Neogastropoda]
  • Ocinebrina, Jousseaume 1880 [Muricidae]
  • Ockerella [Palaeocopida]
  • Ocnerorthis [Eoorthidae]
  • Ocorthis [Orthidae]
  • Octamerella, Teichert and Sweet 1962 [Hemiphragmoceratidae]
  • Octatormentum, Nazarov and Ormiston 1985 [Pseudolitheliidae]
  • Octillaenus, Salter 1867 [Illaenidae]
  • Octobolbina [Palaeocopida]
  • Octobronteus, Weber 1945 [Ptychopariida]
  • Octobrum, Laubenfels 1955 [Hexactinosa]
  • Octoheliocoenia [Stylinidae]
  • Octomedusa [Coronatida]
  • Octonaria [Metacopida]
  • Octonariellina [Metacopida]
  • Octosylthere [Podocopida]
  • Octotremacis [Helioporacea]
  • Octotympanum [Nassellaria]
  • Oculeus, Poletaeva and Romanenko 1970 [Remopleurididae]
  • Oculichasmops, Roomusoks 1986 [Pterygometopidae]
  • Oculina, Gray 1847 [Oculinidae]
  • Oculinella, Yakovlev 1939 [Trachypsammiidae]
  • Oculipora, Sokolov 1952 [Alveolitidae]
  • Oculospongia, Fromentel 1860 [Stellispongiidae]
  • Ocypode, F. Weber 1795 [Ocypodidae]
  • Ocystias, Jordan and Gilbert 1920 [Perciformes]
  • Odaraia [Arthropoda]
  • Odarovithyris [Lobothyrididae]
  • Oderoceras, Ulrich et al. 1943 [Proterocameroceratidae]
  • Odessites, Ljaschenko 1969 [Rossiitidae]
  • Odetta [Heterostrophia]
  • Odoardia [Archaeogastropoda]
  • Odonotrypa [Cystoporata]
  • Odonteobolca, Krell 1991 [Perciformes]
  • Odontionella [Cheilostomata]
  • Odontobasis, Meek 1876 [Buccinidae]
  • Odontocephalus, Conrad 1840 [Dalmanitidae]
  • Odontochile, Hawle and Corda 1847 [Dalmanitidae]
  • Odontocyathus, Moseley 1881 [Caryophylliidae]
  • Odontodiscoceras [Cephalopoda]
  • Odontofusus, Whitfield 1892 [Fasciolariidae]
  • Odontogriphus [Mollusca]
  • Odontogryphaea, Ihering 1903 [Ostreidae]
  • Odontophyllum, Simpson 1900 [Halliidae]
  • Odontopleura, Emmrich 1839 [Odontopleuridae]
  • Odontopleurida, order, Whittington 1959 [Trilobita]
  • Odontopolys [Muricidae]
  • Odontopurpura [Neogastropoda]
  • Odontospirifer [Paeckelmanellidae]
  • Odontoturbo, de Loriol 1887 [Chilodontidae]
  • Odoratus [Rafinesquinidae]
  • Odostomella, Bucquoy et al. 1844 [Pyramidellidae]
  • Odostomia, Fleming 1817 [Pyramidellidae]
  • Odostomidea [Heterostrophia]
  • Oecematobolbina [Palaeocopida]
  • Oeciophylloporina [Fenestrata]
  • Oecoptychius [Oecoptychiidae]
  • Oecotraustes [Oppeliidae]
  • Oedalmia, Cuif 1976 [Reimaniphylliidae]
  • Oedematocidaris [Cidaroida]
  • Oedicybele, Whittington 1938 [Encrinuridae]
  • Oedisoma, Bell 1858 [Decapoda]
  • Oedorhachis, Resser 1938 [Diplagnostidae]
  • Oehlertella, Hall and Clarke 1892 [Disciniidae]
  • Oehlertia, Pillet 1972 [Proetida]
  • Oehlerticrinus, Le Menn 1975 [Monobathrida]
  • Oejlemyra [Palaeocopida]
  • Oelandocaris, K. J. Mller 1983 [Crustacea]
  • Oelandoceras, Foerste 1932 [Ellesmeroceratidae]
  • Oelandodus [Conodontophorida]
  • Oelandograptus [Graptoloidea]
  • Oenochoacrinus, Breimer 1962 [Monobathrida]
  • Oenonites [Eunicemorpha]
  • Oenopota, Mörch 1852 [Conidae]
  • Oepikaluta [Ostracoda]
  • Oepikella [Palaeocopida]
  • Oepikina, Salmon 1942 [Strophomenidae]
  • Oepikinella [Strophomenidae]
  • Oepikites [Obolidae]
  • Oepikium [Palaeocopida]
  • Oepikodus [Conodontophorida]
  • Oertliella [Podocopida]
  • Oeselaspis [Cephalaspidiformes]
  • Oesia [Problematica]
  • Oestophorus, Miller 1892 [Placodermi]
  • Offadesma [Pholadomyida]
  • Offaster [Holasteridae]
  • Offella [Demospongea]
  • Offleyoceras, Foerste 1928 [Offleyoceratidae]
  • Offlyeotrochus [Euomphalina]
  • Offneria [Caprinidae]
  • Ogcocephalus, Fischer 1813 [Lophiiformes]
  • Ogilbia, Jordan and Evermann 1898 [Bythitidae]
  • Ogilviastraea, Oppenheim 1930 [Agariciidae]
  • Ogilviella [Atrypinidae]
  • Ogilvilasma, Pedder 1978 [Streptelasmatidae]
  • Ogilvinella, Eliasova 1976 [Rhipidogyridae]
  • Ogiva [Cheilostomata]
  • Ogivalia [Cheilostomata]
  • Ogivalina [Cheilostomata]
  • Ogivia [Neotaenioglossa]
  • Oglu [Atrypidae]
  • Oglupes [Atrypidae]
  • Ogmasaphus, Jaanusson 1953 [Asaphidae]
  • Ogmoconcha, Triebel 1941 [Healdiidae]
  • Ogmoconchella [Healdiidae]
  • Ogmodirus, Williston and Moodie 1913 [Elasmosauridae]
  • Ogmoopsis [Palaeocopida]
  • Ogmusia [Gibbithyrididae]
  • Ogyginus, Raymond 1912 [Asaphidae]
  • Ogygiocarella, Harrinton and Leanza 1957 [Asaphidae]
  • Ogygiocaris, Angelin 1854 [Asaphidae]
  • Ogygites, Tromelin and Lebescote 1876 [Asaphidae]
  • Ogygitoides, Kobayashi 1934 [Asaphidae]
  • Ogygoceras [Orthocerotidae]
  • Ogygopsis, Walcott 1889 [Dorypygidae]
  • Oharaia, Nelson 1977 [Syringoporidae]
  • Ohioaspis, Wells 1944 [Rhenaniformes]
  • Ohiocaris [Archaeostraca]
  • Ohioceras, Shimizu and Obata 1935 [Kionoceratidae]
  • Ohiocrinus, Wachsmuth and Springer 1886 [Crinoidea]
  • Ohmdenia, Hauff 1953 [Pachycormidae]
  • Ohnopora, Minato and Minoura 1977 [Syringolitidae]
  • Ohuus, Sato 1962 [Stomiatiformes]
  • Oidalagnostus, Westergard 1946 [Diplagnostidae]
  • Oidalaproetus, Wu 1977 [Proetida]
  • Oikozetetes [Orthrozanclidae]
  • Oina, Popov and Tikhonov 1990 [Naukatidae]
  • Oinochoe, Thomas and Holloway 1988 [Lichidae]
  • Oiophyllites [Cephalopoda]
  • Oiosia [Gerkispiridae]
  • Oistoceras, Buckman 1911 [Liparoceratidae]
  • Oistodella [Conodontophorida]
  • Oistodus [Conodontophorida]
  • Oistotrigonia, Cox 1952 [Trigoniidae]
  • Ojlemyra [Palaeocopida]
  • Okathyris [Harpotothyrididae]
  • Oketaella [Foraminifera]
  • Okinawanoarca [Arcida]
  • Okinawavoluta [Neogastropoda]
  • Oklahomacrinus, Moore 1939 [Aesiocrinidae]
  • Oklahomacystis [Comarocystitida]
  • Okribites [Parkinsoniidae]
  • Okulitchicyathus [Archaeocyathida]
  • Okulitchina [Demospongea]
  • Olangocoelia, Bechstädt and Brandner 1970 [Olangocoeliidae]
  • Olbia [Podocopida]
  • Olcostephanus, Neumayr 1875 [Olcostephanidae]
  • Oldhaminella [Lyttoniidae]
  • Olegaspis, Ivshin 1962 [Lonchocephalidae]
  • Olekmaspis, Suvorova 1956 [Ptychopariida]
  • Olenaspella, Wilson 1956 [Aphelaspididae]
  • Olenekina, Egorova 1970 [Ptychopariidae]
  • Olenekoceras [Sibiritidae]
  • Olenellida, order [Trilobita]
  • Olenelloides, Peach 1894 [Olenellida]
  • Olenellus, Hall 1861 [Olenellidae]
  • Oleneothyris [Terebratulida]
  • Olenikites, A. Hyatt 1900 [Sibiritidae]
  • Olenoides, Meek 1877 [Dorypygidae]
  • Olenoidestranans [Corynexochida]
  • Olentella, Ivshin 1953 [Aphelaspididae]
  • Olentotreta, Koneva et al. 1990 [Acrotretidae]
  • Olenus, Dalman 1827 [Olenidae]
  • Oleorthis, Havlicek 1968 [Orthida]
  • Olequahia [Neotaenioglossa]
  • Olgaecyathus [Ajacicyathida]
  • Olgaspis, Korobeinikova 1965 [Redlichiida]
  • Oliganisus [Kloedenellidae]
  • Oligobalistes, Danil'chenko 1960 [Tetraodontiformes]
  • Oligobrachyocrinus, Arendt 1981 [Cladida]
  • Oligoceras [Oncocerida]
  • Oligochelone [Testudines]
  • Oligocythereis [Podocopida]
  • Oligodiodon, Tavani 1955 [Tetraodontiformes]
  • Oligodus [Conodontophorida]
  • Oligolactoria, Tyler and Gregorova 1991 [Tetraodontiformes]
  • Oligometopus, Resser 1936 [Cheilocephalidae]
  • Oligomys [Bohemiellidae]
  • Oligophylloides, Rozkowska 1969 [Heterophylliidae]
  • Oligophyllum, Pocta 1902 [Pentaphyllidae]
  • Oligophyma, Pomel 1869 [Toxopneustidae]
  • Oligoplagia [Porifera]
  • Oligopleura [Amiiformes]
  • Oligopleurus, Thiollière 1850 [Oligopleuridae]
  • Oligoplites, Gill 1864 [Perciformes]
  • Oligoporus [Palaechinidae]
  • Oligoptycha, Meek 1876 [Ringiculidae]
  • Oligoptycherhynchus [Trigonirhynchiidae]
  • Oligoptyxis [Heterostrophia]
  • Oligopus, Risso 1810 [Ophidiiformes]
  • Oligopygoida, order [Echinoidea]
  • Oligopygus [Oligopygidae]
  • Oligorachis, Imbrie 1959 [Araksalosiidae]
  • Oligorthis [Plectorthidae]
  • Oligotopora [Cheilostomata]
  • Olimfalunia [Podocopida]
  • Olinaecaris, Van Straelen 1924 [Decapoda]
  • Olingechiton [Scanochitonidae]
  • Oliva, Bruguière 1789 [Olividae]
  • Oliva (Strephonella), Dall 1909 [Olividae]
  • Olivancillaria, d'Orbigny 1839 [Olividae]
  • Oliveirania [Polychaeta]
  • Olivella, Swainson 1831 [Olividae]
  • Olivella (Dactylidella), Woodring 1928 [Olividae]
  • Oliveria, Sutherland 1965 [Acervulariidae]
  • Olivia [Cancellariidae]
  • Olivula [Olividae]
  • Olkenbachia [Demospongea]
  • Ollachitina [Rhizopodea]
  • Olssonella, Glibert and Van de Poel 1967 [Cardiida]
  • Olssonina [Foraminifera]
  • Omalaxis [Heterostrophia]
  • Omalenlina [Mollusca]
  • Omalogyra, Jeffreys 1867 [Omalogyridae]
  • Omalosecosa [Celleporidae]
  • Omanimaria [Archaeogastropoda]
  • Ombonia, Caneva 1906 [Meekellidae]
  • Omeipsis, Kobayashi 1951 [Taihungshaniidae]
  • Omiphyllum, Kato 1967 [Pseudopavonidae]
  • Ommatartus, Haeckel 1881 [Coccodiscidae]
  • Ommatocampe [Spumellaria]
  • Ommatocarcinus, White 1852 [Goneplacidae]
  • Ommatodiscus [Spumellaria]
  • Ommatokrithe [Podocopida]
  • Ommatospyris [Spumellaria]
  • Ommokris, Holloway 1981 [Dalmanitidae]
  • Omnivenus [Cardiida]
  • Omnutakhella [Atrypidae]
  • Omolonella [Rhynchonellidae]
  • Omolonia [Stringocephalidae]
  • Omolonorhynchia [Rhynchonellida]
  • Omosoma, Costa 1857 [Polymixiiformes]
  • Omosomopsis, Gaudant 1978 [Actinopteri]
  • Omphalocyclus [Orbitoididae]
  • Omphaloptycha [Coelostylinidae]
  • Omphalosaurus, J. C. Merriam 1906 [Omphalosauridae]
  • Omphalotis [Endothyridae]
  • Omphalotropis [Neotaenioglossa]
  • Omulites, Ljaschenko 1969 [Rossiitidae]
  • Onaraspis, Opik 1967 [Metadoxididae]
  • Onavia [Productellidae]
  • Oncagnostus, Whitehouse 1936 [Agnostidae]
  • Onchocephalina, Repina 1960 [Antagmidae]
  • Onchocephalites, Rasetti 1957 [Ptychopariidae]
  • Onchocephalus, Resser 1937 [Antagmidae]
  • Onchonotellus, Lermontova 1956 [Catillicephalidae]
  • Onchonotina, Lu 1964 [Catillicephalidae]
  • Onchonotopsis [Catillicephalidae]
  • Onchonotus, Raymond 1924 [Catillicephalidae]
  • Onchopeltis, Rasetti 1944 [Ptychopariida]
  • Onchopristus [Chondrichthyes]
  • Onchosaurus, Gervais 1852 [Sclerorhynchidae]
  • Onchotrochus, Duncan 1870 [Guyniidae]
  • Oncoceras, J. Hall 1847 [Oncoceratidae]
  • Oncocladia [Demospongea]
  • Oncodona [Demospongea]
  • Oncograptus [Graptoloidea]
  • Oncolepis, Bassani 1898 [Perciformes]
  • Oncopareia, Bosquet 1854 [Nephropidae]
  • Oncorhynchus, Suckley 1860 [Salmoniformes]
  • Oncosella [Lyssacinosa]
  • Oncotechmonus [Myodocopida]
  • Oncousoecia, Canu 1918 [Oncousoeciidae]
  • Ondadiplocteniopsis [Scleractinia]
  • Onega [Paratrilobita]
  • Oneotoceras, Ulrich 1926 [Ellesmeroceratidae]
  • Oneotodus [Conodontophorida]
  • Ongleya, Finlay and Marwick 1937 [Acteonidae]
  • Onithochiton, Gray 1847 [Chitonidae]
  • Onkogrypha [Bivalvia]
  • Onkospira, Zittel 1873 [Eucyclidae]
  • Onnia, Bancroft 1933 [Trinucleidae]
  • Onnicalymene, Dean 1962 [Calymenidae]
  • Onniella, Bancroft 1928 [Dalmanellidae]
  • Onnizetina [Dalmanellidae]
  • Onoba, H. Adams and A. Adams 1834 [Rissoidae]
  • Ontariocrinus, Jaekel 1918 [Cladida]
  • Onugorhynchia [Septalariidae]
  • Onuphionella [Problematica]
  • Onuphis [Eunicemorpha]
  • Onuxodon, Smith 1955 [Carapidae]
  • Onychocella, Jullien 1882 [Onychocellidae]
  • Onychocellaria [Cheilostomata]
  • Onychocrinus, Lyon and Cassidy 1860 [Taxocrinida]
  • Onychodictyon [Panarthropoda]
  • Onychodus [Onychodontidae]
  • Onychophyllum, Smith 1930 [Lykophyllidae]
  • Onychoplecia [Triplesiidae]
  • Onychopterella [Eurypterida]
  • Onychopyge, Harrington 1938 [Ceratopygidae]
  • Onychoselache [Hybodontiformes]
  • Onychotreta, Ulrich and Cooper 1936 [Triplesiidae]
  • Onycopyge, Woodward 1880 [Cheiruridae]
  • Onymagnostus, Opik 1979 [Ptychagnostidae]
  • Onyxites [Discosorida]
  • Oocerina, Foerste 1926 [Oncoceratidae]
  • Oochiton [Schizochitonidae]
  • Oocorys, P. Fischer 1883 [Cassidae]
  • Oocystis [Rhombifera]
  • Oodiscus, Rasetti 1966 [Agnostida]
  • Oolina, d'Orbigny 1839 [Ellipsolagenidae]
  • Oolitella [Foraminifera]
  • Ooliticia [Archaeogastropoda]
  • Oolopygus [Nucleolitidae]
  • Oonendoceras [Yanhecerida]
  • Oonia [Pseudomelaniidae]
  • Oosterella, Kilian 1911 [Oosterellidae]
  • Oosthuizenella, Cooper 1982 [Calmoniidae]
  • Oostrombus, Sacco 1893 [Strombidae]
  • Ootomaria [Archaeogastropoda]
  • Ootomella [Turridae]
  • Opabinia [Problematica]
  • Opalia, H. Adams and A. A 1858 [Epitoniidae]
  • Opaliopsis [Nystiellidae]
  • Opeamorphus [Lyssacinosa]
  • Opechinus [Temnopleuridae]
  • Opella [Archaeogastropoda]
  • Operchallosteus, Kulczycki 1957 [Arthrodiriformes]
  • Operculina [Nummulitidae]
  • Opertochasma, L. W. Stephenson 1953 [Pholadidae]
  • Opertorbitolites [Soritidae]
  • Opertum [Foraminifera]
  • Opetionella, Zittel 1878 [Sollasellidae]
  • Opetiosaurus, Kornhuber 1902 [Aigialosauridae]
  • Ophidiiformes, order, Berg 1937 [Actinopteri]
  • Ophidioceras [Orthocerida]
  • Ophidion [Ophididae]
  • Ophigraptus [Dendroidea]
  • Ophilyroceras, Ruzhencev and Bogoslovskaya 1971 [Rhymmoceratidae]
  • Ophioceras, Barrande 1865 [Ophidoceratidae]
  • Ophiocrinus, Salter 1856 [Diplobathrida]
  • Ophiodermella [Neogastropoda]
  • Ophiodesia [Poecilosclerida]
  • Ophiodon, Girard 1854 [Scorpaeniformes]
  • Ophionautilus [Nautilida]
  • Ophiosema, Opik 1968 [Archaeocopida]
  • Ophiraphidites, Carter 1876 [Astrophorida]
  • Ophisurus, Lacpde 1800 [Anguilliformes]
  • Ophiurocrinus, Jaekel 1918 [Cladida]
  • Ophryotrocha [Eunicemorpha]
  • Ophrystoma, Zittel 1877 [Dactylocalycidae]
  • Ophthalmidium, Kübler and Zwingli 1870 [Ophthalmidiidae]
  • Ophthalmipora [Milioliporidae]
  • Opikatia [Palaeocopida]
  • Opikella [Leptestiidae]
  • Opimaria [Cardiida]
  • Opimilda [Neotaenioglossa]
  • Opimocythere [Podocopida]
  • Opiotoptera [Pterioida]
  • Opipeuter, Fortey 1974 [Telephinidae]
  • Opiphyllum, Kozyreva 1973 [Lithostrotionidae]
  • Opis, Defrance 1824 [Astartidae]
  • Opisoma, Stoliczka 1871 [Astartidae]
  • Opisopneustes [Holasteridae]
  • Opissaster, Pomel 1883 [Schizasteridae]
  • Opisthobranchia, subclass, Milne-Edwards 1848 [Gastropoda]
  • Opisthocoelus [Cyrtodontida]
  • Opisthomyzon, Cope 1889 [Perciformes]
  • Opisthonema, Yu 1974 [Opisthonematidae]
  • Opisthonema, Gill 1862 [Clupeiformes]
  • Opisthoplax [Palaeocopida]
  • Opisthoproctus, Vaillant 1888 [Osmeriformes]
  • Opisthornithopora [Cheilostomata]
  • Opisthotreta, Palmer 1954 [Acrotretidae]
  • Opisthotrigonia [Trigoniida]
  • Opistopteryx, Pictet and Humbert 1866 [Actinopterygii]
  • Oplegnathus, Richardson 1840 [Perciformes]
  • Oplophorus, Milne-Edwards 1837 [Oplophoridae]
  • Opoa, Lane 1972 [Styginidae]
  • Oppelia [Oppeliidae]
  • Oppelisilia (Duncan 1867) [Oppelismiliidae]
  • Oppligera [Poecilosclerida]
  • Opsiconidion, Ludvigsen 1974 [Biernatidae]
  • Opsidiscus, Westergard 1949 [Eodiscidae]
  • Opsimasaphus, Kielan 1960 [Asaphidae]
  • Opsiocrinus, Kier 1952 [Diplobathrida]
  • Opsiosoryctocephalus, Sun 1994 [Corynexochida]
  • Opsithrissops, Daniltshenko 1968 [Osteoglossiformes]
  • Opsypharus, Howells 1982 [Styginidae]
  • Optivus, Whitley 1947 [Beryciformes]
  • Optoturris [Neogastropoda]
  • Oraniceras [Parkinsoniidae]
  • Oratoceras [Oncocerida]
  • Orbiasterocyathus [Ajacicyathida]
  • Orbiblastus, D. B. Macurda 1965 [Spiraculata]
  • Orbicoscinus [Ajacicyathida]
  • Orbiculatisinurostrum [Leiorhynchidae]
  • Orbiculiforma, Pessagno 1973 [Orbiculiformidae]
  • Orbiculopecten [Pterioida]
  • Orbiculopora, Batrukova 1969 [Acrotretida]
  • Orbiculothyris, Wolfart Bender and Stein 1968 [Trematidae]
  • Orbicyathellus [Ajacicyathida]
  • Orbicyathus [Ajacicyathida]
  • Orbignya [Hippuritidae]
  • Orbignyana [Collyritidae]
  • Orbignycoenia [Stylinidae]
  • Orbignycrinus [Millericrinida]
  • Orbignyella [Trepostomida]
  • Orbignygyra, Alloiteau 1952 [Rhipidogyridae]
  • Orbignyna [Foraminifera]
  • Orbignyopora [Ctenostomata]
  • Orbipora [Trepostomida]
  • Orbitammina, Berthelin 1893 [Foraminifera]
  • Orbitella [Cardiida]
  • Orbitestella, Iredale 1906 [Orbitestellidae]
  • Orbithele, Sduy 1955 [Acrothelidae]
  • Orbitoclypeus [Foraminifera]
  • Orbitocyclina [Foraminifera]
  • Orbitoides [Orbitoididae]
  • Orbitokathina [Foraminifera]
  • Orbitolina [Orbitolinidae]
  • Orbitolina [Podocopida]
  • Orbitolinella [Foraminifera]
  • Orbitolinopsis [Orbitolinidae]
  • Orbitolites [Soritidae]
  • Orbitoplax, Tucker and R. Feldmann 1990 [Euryplacidae]
  • Orbitoproetus, Pillet 1969 [Proetidae]
  • Orbitopsella [Foraminifera]
  • Orbitremites [Spiraculata]
  • Orbitulipora [Orbituliporidae]
  • Orbula, Foreman 1973 [Bekomidae]
  • Orbulina, d'Orbigny 1839 [Globigerinidae]
  • Orbulinoides [Foraminifera]
  • Orcadia [Foraminifera]
  • Orcofabella [Palaeocopida]
  • Ordoniya [Podocopida]
  • Ordosia, Lu 1954 [Corynexochida]
  • Ordosoceras, Chang 1959 [Polydesmiidae]
  • Ordovicia [Palaeocopida]
  • Ordovicina [Saccamminidae]
  • Ordovizona [Palaeocopida]
  • Orechina [Palaeocopida]
  • Orectodictya [Rhinidictyidae]
  • Orectolobiformes, order, Applegate 1972 [Chondrichthyes]
  • Orectoloboides, Cappetta 1977 [Orectolobiformes]
  • Orectospira, Dall 1925 [Turritellidae]
  • Orecyta [Demospongea]
  • Oreisator, Geyer and Malinky 1997 [Antagmidae]
  • Orenburgella [Elythidae]
  • Oreochima [Pachycormiformes]
  • Orestia [Hippuritida]
  • Orestiacanthus [Symmoriidae]
  • Orestites [Ceratitida]
  • Oretia [Pergamidiidae]
  • Organoceras [Cephalopoda]
  • Orhomalus, A. Etallon 1861 [Decapoda]
  • Orictocara [Trilobita]
  • Oridorsalis, Anderson 1961 [Rotaliidae]
  • Oriensellina [Norellidae]
  • Orientalina [Palaeocopida]
  • Orienticyathus [Ajacicyathida]
  • Orientina [Foraminifera]
  • Orientospirifer [Delthyrididae]
  • Orientothyris [Gibbithyrididae]
  • Orienturus, Repina 1973 [Trilobita]
  • Orietalia [Foraminifera]
  • Orinella [Pyramidellidae]
  • Orionastraea, Smith 1917 [Lithostrotionidae]
  • Orionina [Podocopida]
  • Orionoides [Cephalopoda]
  • Oriskania [Centronellidae]
  • Orithostella [Foraminifera]
  • Oriundogutta, Nazarov 1988 [Inaniguttidae]
  • Orlovia, Walcott and Resser 1928 [Ptychopariida]
  • Orloviella [Ptychopariida]
  • Ormastralium, Sacco 1896 [Turbinidae]
  • Ormathops, Delo 1935 [Dalmanitidae]
  • Ormistonella, De Wever and Caridroit 1984 [Ormistonellidae]
  • Ormistoniella, Cooper 1982 [Proetidae]
  • Ormoceras, Stokes 1840 [Ormoceratidae]
  • Ornamentaria [Neotaenioglossa]
  • Ornamentaspis, Geyer 1990 [Ellipsocephalidae]
  • Ornatanomalina [Foraminifera]
  • Ornategulum, Forey 1973 [Actinopteri]
  • Ornatoclymenia, Bogoslovsky 1979 [Piriclymeniidae]
  • Ornatoleberis [Podocopida]
  • Ornatophyllum, Nikolaeva 1964 [Entelophyllidae]
  • Ornatoporta [Serpulimorpha]
  • Ornatoptygmatis [Neogastropoda]
  • Ornatothyrella [Aulacothyropsidae]
  • Ornatothyris [Gibbithyrididae]
  • Ornatus [Lychniscosa]
  • Ornithaster [Palaeostomatidae]
  • Ornithella [Zeilleriidae]
  • Ornithopecten [Pterioida]
  • Ornithoprion [Caseodontidae]
  • Ornithothyris [Gibbithyrididae]
  • Ornopsis, B. Wade 1916 [Fasciolariidae]
  • Ornothyrella, Havlicek 1971 [Spiriferida]
  • Orocystites [Rhombifera]
  • Orodes, Geyer 1990 [Trilobita]
  • Orometopus, Broegger 1898 [Alsataspididae]
  • Orophocrinus, K. V. von Seebach 1865 [Fissiculata]
  • Orophosaurus, Cope 1851 [Sauropterygia]
  • Orospheciom [Demospongea]
  • Orostaurs [Spumellaria]
  • Orozoe [Archaeostraca]
  • Orphanaspis, Prantl and Pribyl 1949 [Odontopleuridae]
  • Orria, Walcott 1916 [Corynexochida]
  • Orriella, Rasetti 1938 [Dolichometopidae]
  • Orstenocarida, order, Mller and Walossek 1988 [Arthropoda]
  • Orthambonites, Pander 1830 [Orthidae]
  • Orthaspidoceras [Cephalopoda]
  • Orthaster [Spatangoida]
  • Orthaulax, Gabb 1872 [Strombidae]
  • Orthella [Cornuspiridae]
  • Orthida, order, Schuchert and Cooper 1932 [Rhynchonellata]
  • Orthidiella [Orthidiellidae]
  • Orthidium [Orthidiellidae]
  • Orthiella [Draboviidae]
  • Orthildaites [Hildoceratidae]
  • Orthis, Dalman 1828 [Orthidae]
  • Orthisocrania, Rowell 1963 [Craniidae]
  • Orthobairdia [Bairdiidae]
  • Orthocardium, Tremlett 1950 [Cardiidae]
  • Orthocarina [Atrypinidae]
  • Orthoceltites, L. F. Spath 1951 [Danubitidae]
  • Orthocera (Bruguiére 1789) [Nodosariidae]
  • Orthoceras, Bruguiére 1789 [Orthoceratidae]
  • Orthocerida, order, O. Kuhn 1940 [Cephalopoda]
  • Orthochetus, Cossmann 1889 [Cerithiidae]
  • Orthochilus, Cossmann 1889 [Planaxidae]
  • Orthocidaris [Orthopsidae]
  • Orthoconorca [Serpulimorpha]
  • Orthocormus [Pachycormiformes]
  • Orthocrinus, Jaekel 1895 [Diplobathrida]
  • Orthocycloceras, Barskov 1972 [Orthoceratidae]
  • Orthocypris, Kummerow 1953 [Bairdiocyprididae]
  • Orthodesma, Hall and Whitfield 1875 [Modiomorphidae]
  • Orthodiscus, Schrammen 1924 [Ventriculitidae]
  • Orthodochmioceras [Cephalopoda]
  • Orthogarantiana [Parkinsoniidae]
  • Orthogonium [Medusae]
  • Orthogonocrinus [Roveacrinida]
  • Orthograptus [Graptoloidea]
  • Orthokarstenia [Foraminifera]
  • Ortholina [Cancellothyrididae]
  • Ortholites, Chudinova 1975 [Thecostegitidae]
  • Orthomorphina [Foraminifera]
  • Orthonaria [Palaeocopida]
  • Orthonotacythere [Podocopida]
  • Orthonybyoceras, S. Shimizu and T. Obata 1935 [Proteoceratidae]
  • Orthopelta [Eunicemorpha]
  • Orthophyllum, Pocta 1902 [Anthozoa]
  • Orthopleura [Areostrophiidae]
  • Orthopora [Rhabdomesidae]
  • Orthopristis, Girard 1858 [Perciformes]
  • Orthopsis [Orthopsidae]
  • Orthoptychus [Caprinidae]
  • Orthoptyxis, Yang & Wang 1985 [Cephalaspida]
  • Orthoretiolites [Graptoloidea]
  • Orthorhynchula [Orthorhynchulidae]
  • Orthorhynchuloides [Orthorhynchulidae]
  • Orthosphinctes, Schindewolf 1925 [Perisphinctidae]
  • Orthospirifer [Spinocyrtiidae]
  • Orthostrophella [Orthidae]
  • Orthostrophia [Orthidae]
  • Orthosurcula, Casey 1904 [Turridae]
  • Orthotetes [Orthotetidae]
  • Orthotetoides [Orthotetidae]
  • Orthothecimorpha, class [Hyolitha]
  • Orthothetina, Schellwien 1900 [Meekellidae]
  • Orthothrix [Strophalosiidae]
  • Orthothyris [Chlidonophoridae]
  • Orthotichia, Hall and Clarke 1892 [Schizophoriidae]
  • Orthotoma, Quenstedt 1869 [Orthotomidae]
  • Orthotrigonia, Cox 1952 [Myophorellidae]
  • Orthotrinacria [Milioliporidae]
  • Orthotropia [Linoporellidae]
  • Orthovertella, Cushman and Waters 1928 [Cornuspiridae]
  • Orthoyoldia, Verrill 1897 [Nuculanidae]
  • Ortmannia [Astrophorida]
  • Ortmannispongia [Demospongea]
  • Ortonella [Cyrtodontidae]
  • Orulgania [Licharewiidae]
  • Orulganites, Ruzhencev 1960 [Orulganitidae]
  • Orusia [Finkelnburgiidae]
  • Orvikuina, Gross 1953 [Palaeonisciformes]
  • Oryctocare, Tomashpolskaya 1961 [Corynexochida]
  • Oryctocephalina, Tomashpolskaya 1961 [Oryctocephalidae]
  • Oryctocephalites, Resser 1939 [Oryctocephalidae]
  • Oryctocephalops, Lermontova 1940 [Oryctocephalidae]
  • Oryctocephalus, Walcott 1886 [Oryctocephalidae]
  • Oryctoderma [Hemisphaeramminidae]
  • Oryctomya [Cardiida]
  • Orygmaspis, Resser 1937 [Parabolinoididae]
  • Orygmophyllum, Fomichev 1953 [Aulophyllidae]
  • Osangularia [Foraminifera]
  • Osbornoceras, Foerste 1936 [Karoceratidae]
  • Osburnostylus [Cyclostomata]
  • Osceolia, Walcott 1914 [Asaphida]
  • Osculigera [Hippuritida]
  • Osculipora [Cyclostomata]
  • Osculocystis [Rhombifera]
  • Osekaspis, Prantl and Pribyl 1947 [Cheiruridae]
  • Osilinus [Trochidae]
  • Oslodictyon, Mori 1978 [Clathrodictyidae]
  • Oslogonites [Gonambonitidae]
  • Oslograptus [Graptoloidea]
  • Osmeriformes, order [Actinopteri]
  • Osmerus, Forskal 1775 [Osmeriformes]
  • Osmotoxotis [Palaeocopida]
  • Osoinia [Cardiida]
  • Osorioichthys, Casier 1954 [Palaeonisciformes]
  • Ospriasolen [Cardiida]
  • Ossiania, Monterosato 1884 [Cephalaspida]
  • Ossicrinus [Roveacrinida]
  • Ostariostoma, Schaeffer 1949 [Elopiformes]
  • Ostenocaris [Conchyliocarida]
  • Osteocrinus [Roveacrinida]
  • Osteoglossiformes, order, Berg 1940 [Actinopteri]
  • Osteomya, Moesch 1874 [Pholadomyidae]
  • Osthimosia [Celleporidae]
  • Ostlingoceras, Hyatt 1900 [Turrilitidae]
  • Ostomya, Conrad 1874 [Corbulidae]
  • Ostracion, Rafinesque 1815 [Ostraciidae]
  • Ostracoberyx, Fowler 1934 [Perciformes]
  • Ostrea, Linnaeus 1758 [Ostreidae]
  • Ostreavicula [Bivalvia]
  • Ostreinella [Pterioida]
  • Ostreola, Monterosato 1884 [Ostreidae]
  • Ostreonella [Pterioida]
  • Otapiria, Marwick 1935 [Monotidae]
  • Otaria, Peron 1816 [Otariidae]
  • Otarionella, Weyber 1965 [Aulacopleuridae]
  • Otarionides, Alberti 1969 [Proetida]
  • Otarorhyncha [Rhynchotrematidae]
  • Otarozoum, Thomas and Holloway 1991 [Lichida]
  • Otatara [Neotaenioglossa]
  • Otekmaspis [Trilobita]
  • Otenaspella [Trilobita]
  • Othneiocrinus [Crinoidea]
  • Otionella [Otionellidae]
  • Otoceltites, C. Diener 1916 [Thanamitidae]
  • Otocythere [Podocopida]
  • Otohoplites, Steinmann 1925 [Hoplitidae]
  • Otoites [Otoitidae]
  • Otollonia [Archaeogastropoda]
  • Otomitla, Felix 1891 [Amiiformes]
  • Otomphalus [Archaeogastropoda]
  • Otopleura, P. Fischer 1885 [Pyramidellidae]
  • Otopora [Cheilostomata]
  • Otoscaphites, Wright 1953 [Scaphitidae]
  • Otospirifer [Hysterolitidae]
  • Otostoma, d'Archaic 1859 [Neritidae]
  • Otraczetia [Palaeocopida]
  • Ottadalenites [Orthida]
  • Ottawacrinus, Billings 1887 [Cladida]
  • Ottawella [Eunicemorpha]
  • Ottawina [Phyllodocemorpha]
  • Ottenbyaspis, Bruton 1968 [Ptychopariida]
  • Ottoia, Walcott 1911 [Ottoiidae]
  • Ottoino [Neotaenioglossa]
  • Ottoseetaxis [Fenestrata]
  • Otukaia [Archaeogastropoda]
  • Otusia [Eoorthidae]
  • Ouachitaia [Podocopida]
  • Ouaka, Cheng 1986 [Latentifistulidae]
  • Oudardia [Tellinidae]
  • Ouijjania, Hupe 1953 [Ptychopariida]
  • Oulangia, Milne-Edwards and Haime 1848 [Rhizangiidae]
  • Oulastrea, Milne-Edwards and Haime 1848 [Faviidae]
  • Oulodus [Conodontophorida]
  • Oulophyllia, Milne-Edwards and Haime 1848 [Faviidae]
  • Ourikaia, Geyer 1990 [Trilobita]
  • Ovalastrea, d'Orbigny 1849 [Latomeandridae]
  • Ovalipes, Rathbun 1898 [Carcinidae]
  • Ovalitheca [Hyolithomorpha]
  • Ovalocephalus, Koroleva 1959 [Pliomeridae]
  • Ovalospira [Atrypinidae]
  • Ovaluta, Zhang 1987 [Archaeocopida]
  • Ovalveolina [Alveolinidae]
  • Ovatia [Monticuliferidae]
  • Ovaticeras [Hildoceratidae]
  • Ovatipsa [Neotaenioglossa]
  • Ovatoquasillites [Podocopida]
  • Overtonaspis, White 1961 [Arthrodira]
  • Overtonia [Productellidae]
  • Ovicardium [Cardiida]
  • Oviclypeus [Conoclypeidae]
  • Ovidiella, Nikitin and Popov 1984 [Trimerellidae]
  • Ovinotis [Archaeogastropoda]
  • Ovirissoa, Hedley 1916 [Rissoidae]
  • Ovlatchania [Petasmariidae]
  • Ovocarpus [Cornuta]
  • Ovoceras, Flower 1936 [Brevicoceratidae]
  • Ovocerina, Flower 1957 [Mandaloceratidae]
  • Ovocytheridea [Podocopida]
  • Ovornina [Tricorninidae]
  • Ovulactaeon, Dall 1889 [Cephalaspida]
  • Ovulaster [Micrasteridae]
  • Ovulechinus [Cassiduloida]
  • Ovulocystites [Comarocystitida]
  • Ovulopsis, Moericke 1895 [Cephalaspida]
  • Owenirhynchia [Cyclothyrididae]
  • Oxinoxis [Oxinoxisidae]
  • Oxintoceras, Kusina 1974 [Intoceratidae]
  • Oxlosia, Ulrich and Cooper 1936 [Lingulida]
  • Oxoplecia, Wilson 1913 [Triplesiidae]
  • Oxyacrum [Neogastropoda]
  • Oxyagnostus, Opik 1967 [Agnostidae]
  • Oxybeloceras, Hyatt 1900 [Diplomoceratidae]
  • Oxycerites [Oppeliidae]
  • Oxycolpella [Diplospirellidae]
  • Oxycypraea [Neotaenioglossa]
  • Oxydiscites [Oppeliidae]
  • Oxygonaspis, Zhang 1983 [Trilobita]
  • Oxygonioceras, Foerste 1925 [Brevicoceratidae]
  • Oxygyrus, Benson 1837 [Atlantidae]
  • Oxyjulis, Gill 1864 [Perciformes]
  • Oxylenticeras [Oppeliidae]
  • Oxynaspis, Darwin 1852 [Oxynaspididae]
  • Oxynautilus, Mojsisovics 1902 [Syringonautilidae]
  • Oxynocrinus, Strimple and Watkins 1969 [Cladida]
  • Oxynoticeras [Oxynoticeratidae]
  • Oxynotus, Rafinesque 1810 [Squaliformes]
  • Oxyosteus, Jaeckel 1911 [Arthrodira]
  • Oxyparoniceras [Hildoceratidae]
  • Oxyperas, Mörch 1853 [Mactridae]
  • Oxypleurorhynchia [Trigonirhynchiidae]
  • Oxyprion [Eunicemorpha]
  • Oxypteria [Pterioida]
  • Oxystele [Trochidae]
  • Oxyteuthis [Belemnitida]
  • Oxythyreus [Decapoda]
  • Oxytoma, Meek 1864 [Oxytomidae]
  • Oxytornoceras, Becker 1993 [Tornoceratidae]
  • Oxytropidoceras, Stieler 1920 [Brancoceratidae]
  • Oxytropidoceras (Manuaniceras) (Spath 1925) [Brancoceratidae]
  • Oxytus [Hyolithida]
  • Oxyuropoda [Arthropoda]
  • Oyonnaxastraea, Alloiteau 1952 [Amphiastreidae]
  • Ozakiphyllum, Kato and Minato 1975 [Pseudopavonidae]
  • Ozarkocoelia [Demospongea]
  • Ozarkodina, Branson and Mehl 1933 [Polygnathidae]
  • Ozawainella, Thompson 1935 [Ozawainellidae]
  • Ozius, H. Milne-Edwards 1834 [Oziidae]
  • Ozodochilus, Cossmann 1918 [Trochidae]
  • Ozopora, Weissermel 1941 [Favositidae]
  • Ozora [Productidae]
  • Ozospongia [Reticulosa]
  • Ozotrachelus, Laubenfels 1955 [Vetulinidae]
  • Ozourina [Foraminifera]
  • Paalzowella [Foraminifera]
  • Pabianocrinus [Sagenocrinida]
  • Pacambocythere [Podocopida]
  • Pachancorhynchia [Leiorhynchidae]
  • Pachastrella [Astrophorida]
  • Pachecoa, Harris 1919 [Arcidae]
  • Pachendoceras, Ulrich and Foerste 1936 [Ellesmeroceratidae]
  • Pachinion, Zittel 1878 [Corallistidae]
  • Pachtoceras, Foerste 1926 [Oncocerida]
  • Pachus, Blome 1984 [Pseudodictyomitridae]
  • Pachyascus, Schrammen 1937 [Craticulariidae]
  • Pachyaspis, Resser 1938 [Ptychopariidae]
  • Pachyblastus, A. Breimer and D. B. Macurda 1972 [Fissiculata]
  • Pachycalix [Diploporita]
  • Pachycalymma, Schrammen 1901 [Siphoniidae]
  • Pachycardia [Unionida]
  • Pachycardioceras [Cardioceratidae]
  • Pachycardium, Conrad 1869 [Cardiidae]
  • Pachycaudites [Podocopida]
  • Pachyceras [Pachyceratidae]
  • Pachychelys [Testudines]
  • Pachycidaris [Miocidaridae]
  • Pachycladina [Conodontophorida]
  • Pachyclymenia, Schindewolf 1937 [Pachyclymeniidae]
  • Pachycoenia [Heterocoeniidae]
  • Pachycormiformes, order, Berg 1940 [Actinopteri]
  • Pachycorynea [Demospongea]
  • Pachycoscinus [Ajacicyathida]
  • Pachycothon, Schrammen 1901 [Carterellidae]
  • Pachycraspedon [Cheilostomata]
  • Pachycyathus [Caryophylliidae]
  • Pachycymbiola, Ihering 1907 [Volutidae]
  • Pachydera [Cribrilinidae]
  • Pachydesma [Veneridae]
  • Pachydesmoceras, Spath 1922 [Desmoceratidae]
  • Pachydiadema [Cirripedia]
  • Pachydictya [Rhinidictyidae]
  • Pachydiscoides [Pachydiscidae]
  • Pachydiscus, Zittel 1884 [Pachydiscidae]
  • Pachydomella [Podocopida]
  • Pachydomelloides [Podocopida]
  • Pachydon [Corbulidae]
  • Pachydontella [Archaeogastropoda]
  • Pachyduvalia [Belemnitida]
  • Pachyerymnoceras [Pachyceratidae]
  • Pachyfavosites, Sokolov 1952 [Favositidae]
  • Pachygyra, Milne-Edwards and Haime 1848 [Meandrinidae]
  • Pachyhelioplasma, Kim 1966 [Pseudoplasmoporidae]
  • Pachyhexanchus [Hexanchiformes]
  • Pachykellia, Bernard 1897 [Neoleptonidae]
  • Pachylasma, Darwin 1854 [Pachylasmatidae]
  • Pachylepisma [Hexactinellida]
  • Pachylites, Yanet 1970 [Parastriatoporidae]
  • Pachylocrinus, Wachsmuth and Springer 1879 [Pachylocrinidae]
  • Pachylyroceras, Ruzhencev and Bogoslovskaya 1971 [Neoglyphioceratidae]
  • Pachylytoceras [Cephalopoda]
  • Pachymagas [Terebratellidae]
  • Pachymegalodon [Hippuritida]
  • Pachymelon, Marwick 1926 [Volutidae]
  • Pachymoorellina [Thecidellinidae]
  • Pachymura [Pharetronida]
  • Pachymya, J. de C. Sowerby 1826 [Pholadomyidae]
  • Pachymylus, Woodward 1892 [Callorhinchidae]
  • Pachymytilus [Pterioida]
  • Pachyocrinus [Crinoidea]
  • Pachyopis [Cardiida]
  • Pachyosteus, Jaeckel 1903 [Selenosteidae]
  • Pachyperna [Pterioida]
  • Pachyphloia, Lange 1925 [Pachyphloiidae]
  • Pachyphragma, Watkins 1959 [Aulocystidae]
  • Pachyphyllia, Alloiteau 1957 [Pachyphyllidae]
  • Pachypictonia [Cephalopoda]
  • Pachyplax [Athyrididae]
  • Pachypleurosaurus, Broili 1927 [Pachypleurosauridae]
  • Pachypora, Lindström 1873 [Pachyporidae]
  • Pachypoterion, Hinde 1884 [Pleromatidae]
  • Pachyproetus, Lutke 1990 [Proetida]
  • Pachypsechia [Demospongea]
  • Pachypteria, Koninck 1885 [Pterioida]
  • Pachyrachis [Lychniscosa]
  • Pachyredlichia, Chang 1966 [Redlichiidae]
  • Pachyrisma [Megalodontidae]
  • Pachyrismella [Cardiida]
  • Pachyrissoina [Neotaenioglossa]
  • Pachyrizodus [Crossognathiformes]
  • Pachysceptron [Pennatulacea]
  • Pachyseris, Milne-Edwards and Haime 1849 [Agariciidae]
  • Pachysphinctes, Dietrich [Perisphinctidae]
  • Pachystelliporella, Lin 1977 [Stelliporellidae]
  • Pachystomaria [Cheilostomata]
  • Pachystriatopora, Le Maître 1956 [Pachyporidae]
  • Pachystylostroma, Nestor 1964 [Rosenellidae]
  • Pachysyrnola [Heterostrophia]
  • Pachyteichisma, Zittel 1877 [Pachyteichismatidae]
  • Pachyteichopora [Cyclostomata]
  • Pachyteuthis [Belemnitida]
  • Pachythaerus, Conrad 1869 [Crassatellidae]
  • Pachytheca, Schlüter 1885 [Chaetetidae]
  • Pachytheca [Cheilostomata]
  • Pachythecella [Tessaradomidae]
  • Pachythurammina [Foraminifera]
  • Pachythyris [Loboidothyrididae]
  • Pachytilodia [Pharetronida]
  • Pachytraga [Caprinidae]
  • Pachytrissops [Pachycormiformes]
  • Pacificocoelia [Leptocoeliidae]
  • Pacificurus [Encrinuridae]
  • Pacinonion [Foraminifera]
  • Pacipecten (Olsson 1961) [Pectinidae]
  • Paciphacops, Maksimova 1971 [Phacopidae]
  • Paciphacops (Viaphacops), Maximova 1972 [Phacopidae]
  • Pacitrigonia, Marwick 1932 [Trigoniidae]
  • Padagrosites [Cephalopoda]
  • Padragosiceras [Cephalopoda]
  • Padunoceras, Balashov 1960 [Padunoceratidae]
  • Paeckelmannopora, Weissermel 1939 [Heliolitidae]
  • Paegnium [Palaeocopida]
  • Paenaequina [Leperditicopida]
  • Paenula [Podocopida]
  • Pagea [Eurypterida]
  • Pagecrinus, Kirk 1929 [Cladida]
  • Pagellus, Cuvier and Valenciennes 1830 [Sparidae]
  • Pagetia, Walcott 1916 [Eodiscidae]
  • Pagetides, Rasetti 1945 [Eodiscidae]
  • Pagodia, Walcott 1905 [Pagodiidae]
  • Pagodospira [Lophospiridae]
  • Pagodula, Monterosato 1884 [Muricidae]
  • Pagrus, Lacpde 1802 [Sparidae]
  • Paguristes, J. D. Dana 1851 [Diogenidae]
  • Pagurus, Fabricius 1775 [Paguridae]
  • Pahlenella [Clitambonitidae]
  • Pahvantia [Arthropoda]
  • Paianocrinus, Strimple 1951 [Cladida]
  • Paichiashania [Trilobita]
  • Paiderocrinus, Ausich 1985 [Monobathrida]
  • Paijenborchella, Kingma 1948 [Cytheridae]
  • Paijenborchellina [Podocopida]
  • Paiutiida, order, Tynan 1983 [Problematica]
  • Paiutitubulites [Paiutiida]
  • Paivinia, Rosov and Dubatlova 1985 [Asaphida]
  • Pakistania [Archaeogastropoda]
  • Pakridictya [Cystoporata]
  • Pakrioceras [Tarphycerida]
  • Palacantholithus, Deflandre 1973 [Palacantholithidae]
  • Palachemonella [Foraminifera]
  • Palacorona, Shergold 1971 [Corynexochida]
  • Paladmete, J. A. Gardner 1916 [Paladmetidae]
  • Palaeacanthaspis, Brotzen 1934 [Acanthothoraciformes]
  • Palaeacis, Haime 1857 [Palaeacidae]
  • Palaeacmea [Hydroida]
  • Palaeantedon [Comatulida]
  • Palaearaea, Lindström 1882 [Calostylidae]
  • Palaeastacus, Bell 1850 [Erymidae]
  • Palaeastraea, Kühn 1936 [Reimaniphylliidae]
  • Palaeastraea, Kühn 1936 [Reimaniphylliidae]
  • Palaeatractus [Neogastropoda]
  • Palaechinus [Palaechinidae]
  • Palaedaphus [Dipteridae]
  • Palaega, H. Woodward 1870 [Cirolanidae]
  • Palaelophacmaea [Hydroida]
  • Palaemon, Weber 1795 [Palaemonidae]
  • Palaemysis [Eocaridacea]
  • Palaenigma [Scyphozoa]
  • Palaeoaphrodite [Phyllodocemorpha]
  • Palaeoaplysina, Krotov 1888 [Hydrozoa]
  • Palaeoatherina, Ferrandini and Gaudant 1977 [Atheriniformes]
  • Palaeobalanus [Cirripedia]
  • Palaeobalistum, Blainville 1818 [Nursallidae]
  • Palaeobates [Acrodontidae]
  • Palaeobigenerina [Foraminifera]
  • Palaeobolus [Obolidae]
  • Palaeobotryllus [Problematica]
  • Palaeobranchiostoma [Cephalochordata]
  • Palaeocancellaria [Neogastropoda]
  • Palaeocarcharias, Beaumont 1960 [Lamniformes]
  • Palaeocarcharodon, Casier 1960 [Otodontidae]
  • Palaeocardia [Pterioida]
  • Palaeocardita, Conrad 1867 [Palaeocarditidae]
  • Palaeocarpilius, A. Milne-Edwards 1862 [Carpiliidae]
  • Palaeocentrotus, Kühne 1941 [Lampridiformes]
  • Palaeoceras, Flower 1954 [Plectronoceratidae]
  • Palaeochaeta [Phyllodocemorpha]
  • Palaeochoristites [Palaeochoristitidae]
  • Palaeocomaster [Comatulida]
  • Palaeoconcha, Miller 1889 [Praenuculidae]
  • Palaeoconularia [Monocyathida]
  • Palaeocopida, order, Henningsmoen 1953 [Ostracoda]
  • Palaeocorolites, Leleshus 1965 [Theciidae]
  • Palaeocoryne [Cryptostomata]
  • Palaeocrinus, Billings 1859 [Cladida]
  • Palaeocrisidia [Cyclostomata]
  • Palaeoctopus, Woodward 1896 [Palaeoctopodidae]
  • Palaeocuma [Cumacea]
  • Palaeocyathus, Foerste 1888 [Streptelasmatidae]
  • Palaeocyclendoceras [Endocerida]
  • Palaeocycloceras [Orthocerida]
  • Palaeocyclus, Milne-Edwards and Haime 1849 [Palaeocyclidae]
  • Palaeocypraea, Schilder 1928 [Cypraeidae]
  • Palaeocystites [Gogiida]
  • Palaeocytheridea [Podocopida]
  • Palaeocytheridella [Podocopida]
  • Palaeocyttus, Gaudant 1978 [Zeiformes]
  • Palaeodactylophora [Eunicemorpha]
  • Palaeodecaradium, Goodbody 1986 [Palaeoscenidiidae]
  • Palaeodiadema [Diadematidae]
  • Palaeodictyota [Dendroidea]
  • Palaeodiscus, Salter 1857 [Lepidocentridae]
  • Palaeodromites, A. Milne-Edwards 1865 [Dynomenidae]
  • Palaeodus [Pteraspidomorphes]
  • Palaeoentelophyllum, Lavrusevich 1971 [Stauriidae]
  • Palaeoentolium [Pterioida]
  • Palaeoephippium, Goodbody 1986 [Palaeoscenidiidae]
  • Palaeofavosipora, Stasinska 1976 [Palaeofavosiporidae]
  • Palaeofusulina [Schubertellidae]
  • Palaeogadus, Von Rath 1859 [Merlucciidae]
  • Palaeogaleus, Gurr 1963 [Triakidae]
  • Palaeoglossa [Obolidae]
  • Palaeogoniatites, Hyatt 1900 [Teicherticeratidae]
  • Palaeograpsus, Bittner 1875 [Panopeidae]
  • Palaeoholopus [Sagenocrinida]
  • Palaeohomarus [Decapoda]
  • Palaeohydatina, Cossmann 1895 [Cephalaspida]
  • Palaeoisopoda, order [Pycnogonida]
  • Palaeoisopus [Pycnogonida]
  • Palaeojerea, Gerth 1927 [Anthaspidellidae]
  • Palaeokylix [Hydroida]
  • Palaeolenella, Repina 1960 [Palaeolenidae]
  • Palaeolenides, Egorova 1967 [Ptychopariida]
  • Palaeolentus [Trilobita]
  • Palaeolenus, Mansuy 1912 [Palaeolenidae]
  • Palaeoleptostrophia [Leptostrophiidae]
  • Palaeolima, Hind 1903 [Limidae]
  • Palaeolithostrotion, Lavrusevich 1975 [Stauriidae]
  • Palaeolituonella [Cuneolinidae]
  • Palaeololigo, Naef 1921 [Paleololiginidae]
  • Palaeolucina, Chao 1907 [Mactromyidae]
  • Palaeolycus [Enchodontidae]
  • Palaeomanon, Roemer 1860 [Astylospongiidae]
  • Palaeomiliolina [Spiroloculinidae]
  • Palaeomillepora [Milleporina]
  • Palaeomoera, Stoliczka 1870 [Tellinidae]
  • Palaeomolva, Daniltshenko 1947 [Gadiformes]
  • Palaeomunida, Lorenthey 1902 [Galatheidae]
  • Palaeomunidopsis, Van Straelen 1924 [Galatheidae]
  • Palaeomussa, Alloiteau 1952 [Mussidae]
  • Palaeomya [Cardiida]
  • Palaeomyra, A. Milne-Edwards 1861 [Leucosiidae]
  • Palaeomyrus, Casier 1967 [Anguilliformes]
  • Palaeonectris [Hydroida]
  • Palaeoneilo (Metapalaeoneilo), Lamcke 1934 [Malletiidae]
  • Palaeonephrops, H. Mertin 1941 [Nephropidae]
  • Palaeonisciformes, order, O. P. Hay 1902 [Actinopteri]
  • Palaeonisco [Neotaenioglossa]
  • Palaeopagurus, Van Straelen 1924 [Paguridae]
  • Palaeopalaemon, Whitfield 1880 [Palaeopalaemonidae]
  • Palaeopalinurus, Bachmayer 1954 [Palinuridae]
  • Palaeopantopoda, order [Pycnogonida]
  • Palaeopantopus [Pycnogonida]
  • Palaeopedina [Pedinidae]
  • Palaeopelyx [Eunicemorpha]
  • Palaeopentacheles, Von Knebel 1907 [Palaeopentachelidae]
  • Palaeoperca, Micklich 1978 [Perciformes]
  • Palaeopercichthys, Greenwood 1983 [Serranidae]
  • Palaeophichthys [Tarrasiiformes]
  • Palaeophillipsia, Sugiyama and Okano 1944 [Proetida]
  • Palaeophilomedes [Myodocopida]
  • Palaeophis, R. Owen 1841 [Palaeophiidae]
  • Palaeophoberus, Glaessner 1932 [Stenochiridae]
  • Palaeophragmodictya [Reticulosa]
  • Palaeophreatoicus, Birshtein 1962 [Palaeophreatoicidae]
  • Palaeophyllia [Scleractinia]
  • Palaeophyllites, O. Welter 1922 [Ussuritidae]
  • Palaeophyllum, Billings 1858 [Stauriidae]
  • Palaeophyma [Demospongea]
  • Palaeopinna [Pterioida]
  • Palaeopolycheles [Decapoda]
  • Palaeoporites, Kiaer 1899 [Palaeoporitidae]
  • Palaeopsammia, Wanner 1902 [Guyniidae]
  • Palaeopteria, Whiteaves 1897 [Pterineidae]
  • Palaeopyramidium, Goodbody 1986 [Palaeoscenidiidae]
  • Palaeoreichelina [Foraminifera]
  • Palaeorhaphis [Neogastropoda]
  • Palaeorhincodon, Herman 1975 [Rhincodontidae]
  • Palaeorhynchus, Wagner 1860 [Actinopteri]
  • Palaeorubus [Spumellaria]
  • Palaeosaccus [Lyssacinosida]
  • Palaeoscenidium, Deflandre 1953 [Palaeoscenidiidae]
  • Palaeosceptron [Pennatulacea]
  • Palaeoschada, Myagkova 1955 [Aphrosalpingidae]
  • Palaeoschizophoria [Schizophoriidae]
  • Palaeoschmidtites, Koneva 1979 [Obolidae]
  • Palaeoscolecida, class, Conway-Morris and Robison 1986 [Nematomorpha]
  • Palaeoscolecida [Palaeoscolecida]
  • Palaeoscolex, Whittard 1953 [Palaeoscolecidae]
  • Palaeoscorpius [Scorpiones]
  • Palaeoscyllium, Wagner 1857 [Scyliorhinidae]
  • Palaeosmilia, Milne-Edwards and Haime 1848 [Palaeosmiliidae]
  • Palaeosmilia, Alloiteau 1952 [Scleractinia]
  • Palaeosolemya [Solemyoida]
  • Palaeospinax, Egerton 1872 [Synechodontiformes]
  • Palaeospirifer [Ulbospiriferidae]
  • Palaeospiroplectammina [Palaeospiroplectamminidae]
  • Palaeospondylus [Pteraspidomorphi]
  • Palaeosquilla [Stomatopoda]
  • Palaeostaffella [Foraminifera]
  • Palaeostauronema [Hexactinosa]
  • Palaeosteus [Pteraspidomorphi]
  • Palaeostoma [Palaeostomatidae]
  • Palaeostomatopoda, order, Brooks 1962 [Malacostraca]
  • Palaeostrophia, Ulridch and Cooper 1936 [Tetralobulidae]
  • Palaeostrophomena, Holtedahl 1916 [Leptellinidae]
  • Palaeotanais [Tanaidacea]
  • Palaeotetraphyle [Spumellaria]
  • Palaeotextularia [Palaeotextulariidae]
  • Palaeothalomnus [Spumellaria]
  • Palaeothea [Pycnogonida]
  • Palaeothrissum, de Blainville 1818 [Palaeonisciformes]
  • Palaeothunnus, Bannikov 1978 [Perciformes]
  • Palaeotrimerella, Li and Han 1980 [Trimerellidae]
  • Palaeotripus, Goodbody 1986 [Palaeoscenidiidae]
  • Palaeotrochactaeon, Akopyan 1972 [Cephalaspida]
  • Palaeotuba [Hydroida]
  • Palaeoxanthopsis, Beurlen 1958 [Palaeoxanthopsidae]
  • Palangaria [Archaeogastropoda]
  • Palaskensis [Nautilida]
  • Palastraea, McCoy 1851 [Palaeosmiliidae]
  • Palastreopora [Acroporidae]
  • Paldiskites [Obolidae]
  • Palelialia [Nautilida]
  • Palella, Howell 1937 [Asaphida]
  • Paleoalvania [Heterostrophia]
  • Paleoalveolites, Okulitch 1935 [Paleoalveolitidae]
  • Paleoatactoechus [Trepostomida]
  • Paleocenosphaera [Problematica]
  • Paleoconus, Flower and Gordon 1959 [Hematitidae]
  • Paleocosta [Podocopida]
  • Paleocythere [Ostracoda]
  • Paleodictyoconus [Foraminifera]
  • Paleofavosites, Twenhofel 1914 [Favositidae]
  • Paleofossus, Pokrovskaya 1959 [Edelsteinaspididae]
  • Paleofusimitra, N. F. Sohl 1963 [Mitridae]
  • Paleogaudryina [Foraminifera]
  • Paleogrypophyllum, Ivaniya et al. 1968 [Ptenophyllidae]
  • Paleolina [Sabelliditida]
  • Paleomarcia [Cardiida]
  • Paleomonsmirabilia [Podocopida]
  • Paleonereites [Phyllodocemorpha]
  • Paleononites [Eunicemorpha]
  • Paleopatellina [Foraminifera]
  • Paleopneustes, A. Agassiz 1873 [Paleopneustidae]
  • Paleopolymorphina [Foraminifera]
  • Paleopsephurus, A. MacAlpin 1947 [Polyodontidae]
  • Paleopupa () [Onychochilidae]
  • Paleosphaeronites [Diploporita]
  • Paleostraba [Nuculida]
  • Paleoxiphosphaera [Problematica]
  • Palermites, Toumansky 1937 [Adrianitidae]
  • Paleschara [Fenestrata]
  • Palhemiaster [Hemiasteridae]
  • Palibacus, Forster 1984 [Scyllaridae]
  • Palicites, Gemmellaro 1904 [Tibetitidae]
  • Palintropus, Brodkorb 1970 [Quercymegapodiidae]
  • Palinurina, Munster 1839 [Palinuridae]
  • Palinurus, Weber 1795 [Palinuridae]
  • Paliphyllum, Soshkina 1955 [Paliphyllidae]
  • Paliurus [Serpulimorpha]
  • Pallaimorphina [Foraminifera]
  • Palliocypraea [Neotaenioglossa]
  • Palliolatella, Patterson and Richardson 1987 [Ellipsolagenidae]
  • Palliolum, Monterosato 1884 [Pectinidae]
  • Palmadusta [Cypraeidae]
  • Palmatolepis, Mller 1956 [Palmatolepidae]
  • Palmatophycus [Graptolithina]
  • Palmenella [Podocopida]
  • Palmeraspis, Repina 1973 [Trilobita]
  • Palmerhytis [Chonopectidae]
  • Palmericyathus, R.C. Handfield 1971 [Ajacicyathida]
  • Palmerinella [Foraminifera]
  • Palmerius [Cidaroida]
  • Palmeroceras, Flower 1936 [Spyroceratidae]
  • Palmerocrinus, Knapp 1969 [Catacrinidae]
  • Palmicellaria [Celleporidae]
  • Palmoconcha [Podocopida]
  • Palmoxytoma [Oxytomidae]
  • Palnerostephanus [Cephalopoda]
  • Palocyathus, Filkorn 1994 [Turbinoliidae]
  • Palomelon, Finlay 1927 [Volutidae]
  • Palorbitolina [Orbitolinidae]
  • Palorbitolinoides [Foraminifera]
  • Palpebrops, Lieberman and Edgecombe 1991 [Calmoniidae]
  • Paltaopites [Cephalopoda]
  • Paltechioceras [Echioceratidae]
  • Paltodus [Conodontophorida]
  • Palurites [Eunicemorpha]
  • Palus [Hippuritida]
  • Pamirina [Eostaffellidae]
  • Pamirochaetetes [Tabulospongida]
  • Pamirophyllum, Pyzhyanov 1971 [Durhaminidae]
  • Pamiropora [Disjectoporidae]
  • Pamirorhynchia [Basiliolidae]
  • Pamiroseris, G. K. Melnikova 1971 [Pamiroseriidae]
  • Pamirostroma [Axinellida]
  • Pamirotellus, Balashova 1968 [Phacopida]
  • Pamirothyris [Terebratulida]
  • Pamirothyropsis [Boreiothyrididae]
  • Pammegetherhynchus [Pugnacidae]
  • Pamphagosirenites, Y. N. Popov 1961 [Trachyceratidae]
  • Pampoecilorhynchus [Trigonirhynchiidae]
  • Panarchaegonus [Proetida]
  • Pancheilopora [Cheilostomata]
  • Panchione, Olsson 1964 [Veneridae]
  • Pancornus [Discosorida]
  • Pandaglandulina [Nodosariidae]
  • Pandanocrinus, P. A. Jell et al. 1988 [Monobathrida]
  • Pandaspinapyga, Esker and Levin 1964 [Cheiruridae]
  • Panderia, Volborth 1863 [Panderiidae]
  • Panderia [Palaeocopida]
  • Panderichthys [Coelacanthiformes]
  • Panderina [Productorthidae]
  • Panderodus, Ethington 1959 [Distacodontidae]
  • Pandora, Bruguière 1797 [Pandoridae]
  • Pandoracrinus, Jaekel 1918 [Cladida]
  • Pandorella, Conrad 1863 [Pandoridae]
  • Pandorinellina [Polygnathidae]
  • Pangoa, Marwick 1931 [Buccinidae]
  • Panis, L. W. Stephenson 1953 [Grallatoridae]
  • Panitheca [Orthothecida]
  • Pannellaina [Foraminifera]
  • Panomya, Gray 1857 [Myoida]
  • Panopea (Menard 1807) [Hiatellidae]
  • Panopeus, H. Milne Edwards 1834 [Panopeidae]
  • Panormella [Neogastropoda]
  • Panormida, Senowbari-Daryan 1980 [Solenolmiidae]
  • Pantanellium, Pessagno 1977 [Pantanelliidae]
  • Pantellaria, Dall 1919 [Kraussinidae]
  • Pantoioceras [Discosorida]
  • Pantokratoria [Axinellida]
  • Pantophilus [Enchodontidae]
  • Pantophyllum [Anthozoa]
  • Pantopoda, order, Gerstaecker 1863 [Pycnogonida]
  • Pantosaurus, Marsh 1893 [Cryptoclididae]
  • Panturichthys, Pellegrin 1913 [Anguilliformes]
  • Panxinella, Lin 1974 [Corynexochida]
  • Panxiosteus, Wang 1979 [Panxiosteidae]
  • Paokannia, Ho and Lee 1959 [Redlichiida]
  • Paoshanella, Yin 1937 [Coleolidae]
  • Paphia, Röding 1798 [Veneridae]
  • Paphies, Lesson 1831 [Mesodesmatidae]
  • Papiliolinus [Monticuliferidae]
  • Papiliophyllum, Stumm 1937 [Halliidae]
  • Papillalunaria [Cystoporata]
  • Papillatabairdia [Podocopida]
  • Papillicardium, Sacco 1899 [Cardiidae]
  • Papillina [Fasciolariidae]
  • Papillocyathus [Ajacicyathida]
  • Papillostrophia [Strophodontidae]
  • Papodina [Terebratulida]
  • Paprothites, Bartzsch and Weyer 1987 [Pseudarietitidae]
  • Papyriaspis, Whitehouse 1939 [Ptychopariida]
  • Papyridea, Swainson 1840 [Cardiidae]
  • Paquettoceras, Foerste 1932 [Barrandoceratidae]
  • Paquiericeras, Sayn 1901 [Neocomitidae]
  • Paraacidaspis, Poletaeva 1960 [Lichakephalidae]
  • Paraacrochordiceras [Ceratitida]
  • Paraarctica [Cardiida]
  • Paraaulina, Kuang 1977 [Lithostrotionidae]
  • Parabactrites, Shimanskiy 1948 [Parabactritidae]
  • Parabadiella, Chang 1966 [Abadiellidae]
  • Parabailiella, Thoral 1946 [Conocoryphidae]
  • Parabairdiacypris [Bairdiidae]
  • Parabarrandia, Prantl and Pribyl 1949 [Nileidae]
  • Parabasilicus, Kobayashi 1934 [Asaphidae]
  • Parabathycheilus, Mergl 1984 [Ptychopariida]
  • Parabehavites [Cephalopoda]
  • Parabelodina [Conodontophorida]
  • Parabelopeltis, Naef 1921 [Teuthida]
  • Parabelosteus [Arthrodiriformes]
  • Paraberounella [Berounellidae]
  • Paraberriasella [Cephalopoda]
  • Paraberyx, David 1946 [Beryciformes]
  • Parabevalites [Cephalopoda]
  • Parabifolium [Thecideidae]
  • Parablackwelderia, Kobayashi 1942 [Damesellidae]
  • Parablastoidea, class [Echinodermata]
  • Parabolbina [Palaeocopida]
  • Paraboliceras [Neocomitidae]
  • Paraboliceratoides [Neocomitidae]
  • Parabolina, Salter 1849 [Olenidae]
  • Parabolinella, Brögger 1882 [Olenidae]
  • Parabolinites, Henningsmoen 1957 [Olenidae]
  • Parabolinoides, Frederickson 1949 [Parabolinoididae]
  • Parabolinopsis [Olenidae]
  • Paraborsonia, Pilsbry 1922 [Turridae]
  • Parabotryocrinus, Yakovlev 1941 [Cladida]
  • Parabouchekius [Palaeocopida]
  • Parabouleia, Eldredge 1972 [Calmoniidae]
  • Parabournonia [Hippuritida]
  • Parabrachyelasma, Cherepnina 1960 [Streptelasmatidae]
  • Parabrissus [Schizasteridae]
  • Parabuchanosteus, White and Toombs 1972 [Arthrodira]
  • Parabumasttides [Asaphida]
  • Parabursacrinus, Wanner 1924 [Zeacrinitidae]
  • Parabuxtonia [Productidae]
  • Parabythocythere [Bythocytheridae]
  • Paracadoceras [Cadoceratidae]
  • Paracalamus, Arambourg 1927 [Perciformes]
  • Paracaligella [Foraminifera]
  • Paracalmonia, Struve 1958 [Calmoniidae]
  • Paracalycoceras [Lyelliceratidae]
  • Paracannia [Anthozoa]
  • Paracanthodus [Protoconodontida]
  • Paracanthoplites, Stoyanow 1949 [Deshayesitidae]
  • Paracapillithyris [Capillithyrididae]
  • Paracaprinula, Piveteau 1939 [Plagioptychidae]
  • Paracarcinosoma [Eurypterida]
  • Paracarinachites [Zhijinitidae]
  • Paracarruthersella, Yoh 1961 [Geyerophyllidae]
  • Paracassidulina [Foraminifera]
  • Paracatillocrinus, Wanner 1916 [Catillocrinidae]
  • Paracaudites [Podocopida]
  • Paracavellina [Metacopida]
  • Paracedaria, Duncan 1949 [Llanoaspididae]
  • Paracenoceras, Spath 1927 [Paracenoceratidae]
  • Paracentrophorus, Piveteau 1941 [Paracentrophoridae]
  • Paraceratites, A. Hyatt 1900 [Ceratitidae]
  • Paraceratitoides, A. Parnes 1975 [Hungaritidae]
  • Paraceraurus, Männil 1958 [Cheiruridae]
  • Paracerithium [Neotaenioglossa]
  • Paracharnia [Rangeomorpha]
  • Parachasmatopora [Fenestrata]
  • Parachaunoproetus, Yuan 1988 [Proetida]
  • Parachirognathus [Conodontophorida]
  • Parachonetes [Strophochonetidae]
  • Parachuangia, Qiu 1983 [Phacopida]
  • Paracidaris [Cidaridae]
  • Paracirculus [Archaeogastropoda]
  • Paracladiscites, E. v. Mojsisovics 1896 [Cladiscitidae]
  • Paraclathurella [Neogastropoda]
  • Paraclausastraea, Zlatarski 1968 [Montlivaltiidae]
  • Paracleistoceras, Foerste 1926 [Acleistoceratidae]
  • Paraclidochirus [Sagenocrinida]
  • Paraclimacograptus [Graptoloidea]
  • Paraclythia, Fritsch and Kafka 1887 [Nephropidae]
  • Paraclytiopsis, Oravec 1962 [Clytiopsidae]
  • Paracodaster, Yakovlev 1940 [Fissiculata]
  • Paracolocrinus, Brett 1980 [Crinoidea]
  • Paracolumnaria [Anthozoa]
  • Paracomatula, Hess 1950 [Paracomatulidae]
  • Paracomitas, Powell 1942 [Turridae]
  • Paracomminia [Neogastropoda]
  • Paracomposita, Ding and Yao 1985 [Spiriferida]
  • Paraconger, Kanazawa 1961 [Anguilliformes]
  • Paracongroides, Blot 1978 [Anguilliformes]
  • Paraconlinoceras [Acanthoceratidae]
  • Paraconradoceras, Foerste 1926 [Nothoceratidae]
  • Paraconularia [Conulariidae]
  • Paracoosia, Kobayashi 1936 [Anomocaridae]
  • Paracorax, Cappetta 1977 [Lamniformes]
  • Paracorbicula [Cardiida]
  • Paracordylodus [Conodontophorida]
  • Paracoroniceras, Spath 1922 [Arietitidae]
  • Paracoscinus [Archaeocyathida]
  • Paracoskinolina [Foraminifera]
  • Paracosmetocrinus, Strimple 1967 [Cladida]
  • Paracosta [Podocopida]
  • Paracostanoplia, Xu 1977 [Spiriferida]
  • Paracotylederma, Manni and Nicosia 1990 [Cyrtocrinida]
  • Paracraniops, Williams 1963 [Craniopsidae]
  • Paracraspedites [Polyptychitidae]
  • Paracraticularia, Schrammen 1937 [Hexactinosa]
  • Paracremacrinus, Brower 1977 [Crinoidea]
  • Paracrescis [Cyclostomata]
  • Paracrinoidea, class [Echinodermata]
  • Paracrioceras [Ancyloceratidae]
  • Paracrocephalites, Poulsen 1954 [Ptychopariida]
  • Paracrocrinus, Arendt and Stupachenko 1983 [Monobathrida]
  • Paracromyocrinus, Strimple 1966 [Cromyocrinidae]
  • Paracrothyris [Stringocephalidae]
  • Paracryphaeus, Gandl 1972 [Acastidae]
  • Paractenoloculina [Palaeocopida]
  • Paractinoceras, Hyatt in Zittel 1900 [Actinoceratidae]
  • Paractocrinus [Crinoidea]
  • Paracuariceras [Cephalopoda]
  • Paracunnolites, Beauvais 1964 [Cunnolitidae]
  • Paracyathus, Edwards and Haime 1848 [Caryophylliidae]
  • Paracybantyx, Ludvigson and Tripp 1990 [Styginidae]
  • Paracybeloides, Hupé 1955 [Encrinuridae]
  • Paracyclammina [Foraminifera]
  • Paracyclas, Hall 1843 [Mactromyidae]
  • Paracyclendoceras [Endocerida]
  • Paracyclostomiceras, Cecioni 1953 [Cyclostomiceratidae]
  • Paracydonocrinus, Arendt 1970 [Cladida]
  • Paracymatoceras, Spath 1927 [Nautilidae]
  • Paracymatodus [Petalodontiformes]
  • Paracymbiocrinus, Burdick and Strimple 1973 [Aesiocrinidae]
  • Paracymbites [Oxynoticeratidae]
  • Paracyprideis [Podocopida]
  • Paracyprinotus [Podocopida]
  • Paracypris [Bairdiidae]
  • Paracystiphylloides, Tsien 1969 [Digonophyllidae]
  • Paracystis, Sjberg 1915 [Stephanoblastidae]
  • Paracythere [Podocopida]
  • Paracythereis [Podocopida]
  • Paracytheretta [Podocopida]
  • Paracytheridea, Muller 1894 [Paracytherideidae]
  • Paracytherois [Podocopida]
  • Paracytheroma [Podocopida]
  • Paracytheromorpha [Podocopida]
  • Paracytheropteron [Podocopida]
  • Paradagmarita [Foraminifera]
  • Paradainella [Foraminifera]
  • Paradakeoceras [Ellesmerocerida]
  • Paradanubites, A. A. Shevyrev 1968 [Danubitidae]
  • Paradasyceras [Juraphyllitidae]
  • Paradechenella, Richter 1912 [Proetida]
  • Paradelocrinus, Moore and Plummer 1937 [Cladida]
  • Paradelograptus [Dendroidea]
  • Paradeltocyathus [Turbinoliidae]
  • Parademonedys [Rugosochonetidae]
  • Paradeningeria, Senowbari-Daryan and Schäfer 1979 [Solenolmiidae]
  • Paradentalium, Cotton and Godfrey 1933 [Dentaliidae]
  • Paradiabolocrinus, Brower and Veinus 1974 [Diplobathrida]
  • Paradiceras [Hippuritida]
  • Paradichocrinus, Springer 1926 [Monobathrida]
  • Paradicidia [Cephalopoda]
  • Paradimeroceras, Bogoslovsky 1957 [Dimeroceratidae]
  • Paradimorphoceras, Ruzhencev 1947 [Dimorphoceratidae]
  • Paradinarites, Zhao 1950 [Columbitidae]
  • Paradinobolus, Li and Han 1980 [Trimerellidae]
  • Paradiscoceras [Tarphycerida]
  • Paradisphyllum, Strusz 1965 [Disphyllidae]
  • Paradistichites, C. Diener 1916 [Distichitidae]
  • Paradistichophyllum, Melnikova 1975 [Reimaniphylliidae]
  • Paradnatoceras [Orthocerida]
  • Paradolerorthis [Hesperorthidae]
  • Paradomatoceras, Delépine 1937 [Grypoceratidae]
  • Paradonax [Donacidae]
  • Paradoxaphyllia [Anthozoa]
  • Paradoxechinus [Temnopleuridae]
  • Paradoxia [Bivalvia]
  • Paradoxides, Brongniart 1822 [Paradoxididae]
  • Paradoxiella [Schubertellidae]
  • Paradoxocrinus, Wanner 1937 [Crinoidea]
  • Paradoxostoma [Podocopida]
  • Paradrilla [Neogastropoda]
  • Paradrilonereigenys [Phyllodocemorpha]
  • Paradrydenius, Kazantseva-Selezneva 1980 [Palaeonisciformes]
  • Paradunbarula [Foraminifera]
  • Paraduplophyllum [Lophotichiidae]
  • Paradygella [Terebratulida]
  • Paraechinorhinus [Squaliformes]
  • Paraechmina, Ulrich and Bassler 1923 [Aechminidae]
  • Paraemanuella [Ambocoeliidae]
  • Paraendoceras, Ulrich and Foerste 1936 [Proterocameroceratidae]
  • Paraendothyra [Foraminifera]
  • Paraenshia, Qiu 1983 [Ptychopariida]
  • Paraeofusulina [Fusulinoidea]
  • Paraeoleperditia, Adachi and Igo 1980 [Leperditicopida]
  • Paraeoliscus, Blot 1981 [Gasterosteiformes]
  • Paraeosoptychoparia, Qiu 1983 [Ptychopariida]
  • Paraesa, Casey 1952 [Veneridae]
  • Paraeucypris [Podocopida]
  • Paraexophthalmocythere [Podocopida]
  • Parafallotaspis, Fritz 1972 [Fallotaspididae]
  • Parafavella [Spirotrichia]
  • Parafenestalia [Fenestrata]
  • Parafenestella [Fenestrata]
  • Parafissurina, Parr 1947 [Ellipsolagenidae]
  • Parafollicucullus, Holdsworth and Jones 1980 [Follicucullidae]
  • Paraformichella, Qian and Zhang 1983 [Helcionelloida]
  • Parafrithjofia, Yuan 1988 [Proetida]
  • Parafrondicularia [Foraminifera]
  • Parafusulina [Schwagerinidae]
  • Parafusulinella [Foraminifera]
  • Parafusus, B. Wade 1918 [Volutidae]
  • Paragalathea, Patrulius 1959 [Galatheidae]
  • Paragaleus, Budker 1935 [Hemigaleidae]
  • Paragammarocrinites, Jager 1982 [Cyrtocrinida]
  • Paragaricocrinus, Yakovlev 1934 [Monobathrida]
  • Paragassizocrinus, Moore and Plummer 1940 [Agassizocrinidae]
  • Paragattendorfia, Schindewolf 1924 [Prionoceratidae]
  • Paragaudryina [Foraminifera]
  • Paragazacrinus, Springer 1926 [Diplobathrida]
  • Paraginglymostoma, Herman 1982 [Brachaeluridae]
  • Paraglans, Chavan 1941 [Carditidae]
  • Paraglauconia [Neotaenioglossa]
  • Paraglobivalvulina [Biseriamminidae]
  • Paraglobivalvulinoides [Foraminifera]
  • Paragloborotalia [Foraminifera]
  • Paraglossinulus [Uncinulidae]
  • Paraglossograptus [Graptoloidea]
  • Paraglycerites [Phyllodocemorpha]
  • Paraglyptopleura [Palaeocopida]
  • Paragnathites [Eunicemorpha]
  • Paragoceras, G. v. Arthaber 1911 [Paragoceratidae]
  • Paragogia [Eocrinidae]
  • Paragonatodus, Kazantseva-Selezneva 1980 [Palaeonisciformes]
  • Paragraphiocrinus, Wanner 1937 [Cladida]
  • Paragraulos, Lu 1941 [Agraulidae]
  • Paragrenocythere [Podocopida]
  • Paragriffithides, Reed 1943 [Proetida]
  • Paragymnites, A. Hyatt 1900 [Gymnitidae]
  • Parahalobia [Pterioida]
  • Parahalomitra, Wells 1937 [Fungiidae]
  • Paraharpes, Whittington 1950 [Harpetidae]
  • Parahastites [Belemnitida]
  • Parahauerites, C. Diener 1916 [Klamathitidae]
  • Parahealdia [Palaeocopida]
  • Parahelicoprion [Agassizodontidae]
  • Parahemingwayella [Podocopida]
  • Parahemiptychina [Gillediidae]
  • Paraheptranchias [Hexanchiformes]
  • Paraheritschioides [Kleopatrinidae]
  • Paraheteraster [Spatangoida]
  • Parahexacrinus, Shevchenko 1967 [Monobathrida]
  • Parahibolites [Belemnitida]
  • Parahildaites [Hildoceratidae]
  • Parahippa [Palaeocopida]
  • Parahollinella [Amphissitidae]
  • Parahomalonotus, Reed 1918 [Homalonotidae]
  • Parahomoceras, Ruzhencev and Bogoslovskaya 1971 [Homoceratidae]
  • Parahoplites, Anthula 1899 [Parahoplitidae]
  • Parahsuum, Yao 1982 [Hsuidae]
  • Parahughmillera [Eurypterida]
  • Parahyolithes [Hyolithomorpha]
  • Parainoceramus, Voronetz 1936 [Inoceramidae]
  • Paraipciphyllum, Wu 1963 [Waagenophyllidae]
  • Paraipichthys, Gaudant 1978 [Polymixiiformes]
  • Parairvingella, Kobayashi 1938 [Ptychopariida]
  • Parajaubertella, Matsumoto 1942 [Tetragonitidae]
  • Parajonesites [Palaeocopida]
  • Parajuresania [Echinoconchidae]
  • Parajuvavites, E. v. Mojsisovics 1896 [Haloritidae]
  • Parakansuella [Monticuliferidae]
  • Parakarpinskia [Karpinskiidae]
  • Parakellnerites, H. Rieber 1973 [Ceratitidae]
  • Parakidograptus [Graptoloidea]
  • Parakingasidoides [Ptychopariida]
  • Parakionoceras, Foerste 1928 [Arionoceratidae]
  • Parakoldinia, Rozova 1960 [Cheilocephalidae]
  • Parakorilithes [Hyolithida]
  • Parakozlowskiella [Palaeocopida]
  • Parakrithe [Podocopida]
  • Parakrithella [Podocopida]
  • Parakunmingella, Chang 1974 [Archaeocopida]
  • Paralabamina [Foraminifera]
  • Paralaeospira [Serpulimorpha]
  • Paralazutkinia [Theodossiidae]
  • Paralbertella, Palmer 1969 [Zacanthoididae]
  • Paralbula, Blake 1940 [Phyllodontidae]
  • Paralcidia [Oppeliidae]
  • Paraldingia, Richardson 1973 [Kingenidae]
  • Paralegoceras, Hyatt 1884 [Schistoceratidae]
  • Paralejurus, Hawle and Corda 1847 [Styginidae]
  • Paralenorthis, Havlicek and Branisa 1980 [Orthidae]
  • Paralenticeras [Sphenodiscidae]
  • Paraleolichas [Lichida]
  • Paraleperditia [Leperditicopida]
  • Paralepis, Cuvier 1816 [Paralepididae]
  • Paraleptostrophia [Leptostrophiidae]
  • Paralevisia, Zhang and Jell 1987 [Corynexochida]
  • Paralhederella [Cyclostomata]
  • Paralichthys, Girard 1858 [Bothidae]
  • Paralingulina [Ichthyolariidae]
  • Paralioclema [Araxoporidae]
  • Paralisaniella, Qiu 1983 [Corynexochida]
  • Paralithostrotion, Gorskiy 1938 [Petalaxidae]
  • Paralitogaster, Glaessner 1969 [Litogastroidae]
  • Parallelelasma [Parallelelasmatidae]
  • Parallelopora, Bargatzky 1881 [Syringostromatidae]
  • Parallelora [Spiriferidae]
  • Parallelostroma, Nestor 1966 [Coenostromatidae]
  • Paralleynia, Soshkina 1936 [Laccophyllidae]
  • Paralogoniscus, Kazantseva-Selentseva 1981 [Palaeonisciformes]
  • Paralorenzella, Zhang 1983 [Ptychopariida]
  • Paraloxoceras, Flower 1939 [Pseudorthoceratidae]
  • Paralucinella, Chavan 1951 [Lucinidae]
  • Paralytoceras, Frech 1902 [Pseudarietitidae]
  • Paralyttonia [Rigbyellidae]
  • Paramalungia, Chang 1966 [Redlichiida]
  • Paramammites, Furon 1935 [Acanthoceratidae]
  • Paramansuyella, Endo 1937 [Asaphida]
  • Paramarginatia [Productidae]
  • Paramarginifera [Productellidae]
  • Paramarria [Mimetasterida]
  • Paramarshallena [Neogastropoda]
  • Paramartesia [Myoida]
  • Paramblypterus, Sauvage 1888 [Paramblypteriformes]
  • Paramecynoceras [Discosorida]
  • Paramegalaspis, Thoral 1935 [Asaphidae]
  • Paramegaliocrinus, Arendt 1983 [Monobathrida]
  • Paramegalodus [Hippuritida]
  • Paramegateuthis [Belemnitida]
  • Paramelocrinus, Ubaghs 1958 [Monobathrida]
  • Paramerista [Meristidae]
  • Paramesolepis, Moy-Thomas and Dyne 1938 [Palaeonisciformes]
  • Paramesolobus [Rugosochonetidae]
  • Parametaria, Dall 1916 [Columbellidae]
  • Paramicmacca, Lermontova 1951 [Ptychopariida]
  • Paramicrocheilinella [Podocopida]
  • Paramixogonaria [Anthozoa]
  • Parammatoceras [Hammatoceratidae]
  • Paramoelleritia [Leperditicopida]
  • Paramoltkia [Gorgonacea]
  • Paramonopleura [Hippuritida]
  • Paramooreoceras [Orthocerida]
  • Paramorea, B. Wade 1917 [Pholidotomidae]
  • Paramphicrinus, H.L. Strimple and R.C. Moore 1971 [Euryocrinidae]
  • Paramphisile, Blot 1981 [Gasterosteiformes]
  • Paramplexoides, He 1978 [Streptelasmatidae]
  • Paramuirwoodia [Productidae]
  • Paramunseyella [Podocopida]
  • Paramya [Myidae]
  • Paramylostoma [Arthrodiriformes]
  • Paramysis [Mysidacea]
  • Paranacyathus [Archaeocyathida]
  • Paranacystis [Mitrata]
  • Paranaia [Meganterididae]
  • Parananlingella [Foraminifera]
  • Paranassa [Nassariidae]
  • Paranautilus, Mojsisovics 1902 [Liroceratidae]
  • Paranclyoceras [Cephalopoda]
  • Parandiceras, Spath 1939 [Neocomitidae]
  • Paranditrigonia [Trigoniida]
  • Paranecrocarcinus, Van Straelen 1936 [Necrocarcinidae]
  • Paraneistrolepis [Neogastropoda]
  • Paranereites [Phyllodocemorpha]
  • Paranesidea [Podocopida]
  • Paranevadella [Judomiidae]
  • Parangarenga [Neogastropoda]
  • Paranguilla, Bleeker 1864 [Anguilliformes]
  • Parangularia [Purpurinidae]
  • Paranicklespora [Cryptostomata]
  • Paranisocrinus [Sagenocrinida]
  • Paranisopleurella [Sowerbyellidae]
  • Paranogmius [Crossognathiformes]
  • Paranomia, Conrad 1860 [Anomiidae]
  • Paranomotodon, Herman 1975 [Lamniformes]
  • Paranoritoides [Ceratitida]
  • Paranorwoodia, Rasetti 1945 [Norwoodiidae]
  • Paranotacythere [Podocopida]
  • Paranothosaurus, Peyer 1939 [Nothosauridae]
  • Paranoviportia [Palaeocopida]
  • Paranowakia, B. Boucek 1964 [Paranowakiidae]
  • Paranumia [Ptychopariida]
  • Paraolenoides, Ivshin 1952 [Corynexochida]
  • Paraolenus, Lermontova 1951 [Ptychopariida]
  • Paraoliganisus [Palaeocopida]
  • Paraoligorhyncha [Oligorhynchiidae]
  • Paraonychoplecia [Triplesiidae]
  • Paraophthalmidium [Ophthalmidiidae]
  • Paraorlovia, Chernysheva 1956 [Asaphiscidae]