Kingdom [Animalia] Linnaeus, 1758 - animals
   Phylum Chordata Bateson, 1885 - chordates
     Subphylum Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
       Class Elasmobranchiomorphi see Infraphylum Gnathostomata Gegenbaur, 1874
         Subclass †Placodermi McCoy, 1848 see Class Placodermi McCoy, 1848
           1 Order †Arthrodira Woodward, 1891 see [unranked] Arthrodira Woodward, 1891
           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
           4 Order †Antiarchi Cope, 1885 see [unranked] Antiarchi Cope, 1885