Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
   Gnathostomata
     Class †Placodermi McCoy, 1848
       Order †Arthrodira Woodward, 1891 see [unranked] Arthrodira Woodward, 1891
         Suborder †Wuttagoonaspina Ritchie, 1973 [monotypic] see Order Actinolepidiformes
           Family †Wuttagoonaspidae Ritchie, 1973 [monotypic] see Family Wuttagoonaspididae Ritchie, 1973, nom. praeval.
             1 Genus †Wuttagoonaspis Ritchie, 1973