Kingdom [Animalia] Linnaeus, 1758 - animals Phylum Chordata Bateson, 1885 - chordates Subphylum Vertebrata Cuvier, 1812 - vertebrates Class Elasmobranchiomorphi see Infraphylum Gnathostomata Gegenbaur, 1874 Subclass †Placodermi McCoy, 1848 see Class Placodermi McCoy, 1848 Order †Petalichthyida Jaekel, 1911 see Order Petalichthyiformes