Invalid subtaxa: Cephalorhynchinae Fraser and Purves 1960, Delphinus chilensis Philippi 1896 [nomen dubium], Delphinus malayanus Lesson 1826 [nomen nudum], Grampidelphidae Nishiwaki 1963, Hemisyntrachelidae Slijper 1936, Prodelphinus malayanus Lesson 1826 [nomen nudum], Stenidae Fraser and Purves 1960, Steninae Fraser and Purves 1960, Steno cudmorei Chapman 1917 [nomen dubium], Steno malayanus Lesson 1826 [nomen nudum], Trispondylus Vanden Broeck 1874 [nomen dubium], Tursiops miocaenus Portis 1886 [nomen dubium]
Full reference: J. E. Gray. 1821. On the natural arrangement of vertebrose animals. The London Medical Repository Monthly Journal and Review 15:296-310
Parent taxon: Delphinoidea according to G. Bianucci 2013
Sister taxa: Albireonidae, Delphinavus, Graamocetus, Kentriodontidae, Lamprolithax, Miodelphis, Monodontidae, Nannolithax, Odobenocetopsidae, Oedolithax, Palaeophocaena, Phocoenidae, Platylithax, Protodelphinus, Sinanodelphis
Subtaxa: Anacharsis, Australodelphis, Catodontina, Delphininae, Etruridelphis, Globicephalinae, Lagenorhynchina, Lagenorhynchus, Leucopleurus, Lissodelphininae, Monoceratina, Orcaella, Orcaellinae, Orcina, Orcininae, Orcinus, Septidelphis, Steno, Stenonina, Stenoninae
Ecology: aquatic piscivore-carnivore