Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
   Gnathostomata
     Class †Placodermi McCoy, 1848
       Order †Arthrodira Woodward, 1891 see [unranked] Arthrodira Woodward, 1891
         Suborder †Brachythoraci Gross, 1932
           Superfamily †Coccosteoidea Traquair, 1888
             1 Family †Gemuendenaspidae Miles, 1962
             2 Family †Coccosteidae Asmuss, 1856
             3 Family †Camuropiscidae Dennis & Miles, 1979
             4 Family †Pholidosteidae Gross, 1932
             5 Family †Incisoscutidae Denison, 1984 see Family Camuropiscidae Dennis & Miles, 1979