Actinopteri - Semionotiformes - Semionotidae
Invalid subtaxa: Semionotus dubius Bellotti 1857 [nomen dubium], Semionotus gibbus Seebach 1866 [nomen nudum], Semionotus inermis Bellotti 1857 [nomen dubium], Semionotus leptocephalus Agassiz 1836 [nomen dubium], Semionotus metcalfi Swinnerton 1928 [nomen dubium], Semionotus nilsonni Agassiz 1837 [nomen dubium], Semionotus trotti Bellotti 1857 [nomen dubium]
Full reference: L. Agassiz. 1843. Recherches Sur Les Poissons Fossiles. Tome I (livr. 18). Imprimerie de Petitpierre, Neuchatel xxxii-188
Parent taxon: Semionotidae according to A. López-Arbarello 2012
Sister taxa: Acentrophorus, Aetheolepis, Aphnelepis, Archaeolepidotus, Archaeosemionotus, Asialepidotus, Cleithrolepis, Colobodus, Dandya, Eosemionotus, Hemicalypterus, Pristisomus, Sargodon, Tetragonolepis, Tianfuichthys
Subtaxa: Semionotus australis, Semionotus bergeri, Semionotus capensis, Semionotus formosus, Semionotus kanabensis, Semionotus kapffi, Semionotus normanniae, Semionotus tenuis
Type: Semionotus bergeri
Ecology: nektonic carnivore