[Phylum] Chordata Bateson, 1885 - chordates Subphylum Craniata auct. Infraphylum Vertebrata Lamarck, 1801 - vertebrates Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates Class †Placodermi McCoy, 1848 †Antiarchi Cope, 1885 - antiarchs Order †Asterolepidiformes Family †Asterolepididae Traquair, 1888 (1856), nom. praeval. Genus †Chelonichthys Agassiz, 1844 see Genus Asterolepis Eichwald, 1840