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
           1 Order †Arthrodira Woodward, 1891 see Order Arthrodiriformes Grande & Eastman, 1986
           2 Order †Ptyctodontida Gross, 1932 see Order Ptyctodontiformes
           3.1 Order †Phyllolepida Stensiö, 1934 see Suborder Phyllolepidoidei
           3.2 Order †Petalichthyida Jaekel, 1911 see Order Petalichthyiformes
           3.3 Order †Rhenanida Broili, 1930 see Order Rhenaniformes
           4 Order †Antiarchi Cope, 1885 see Order Antiarchiformes Grande & Eastman, 1986