Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
   Class Agnatha Cope, 1889 [paraphyletic]
     Subclass Cephalaspidomorpha see Class Agnatha Cope, 1889
       Order †Galeaspida Liu, 1965 see Order Galeaspidiformes
         01 Family †Hanyangaspidae Pan & Liu, 1975 see Family Hanyangaspididae Pan & Liu, 1975, nom. praeval.
         02 Family †Galeaspidae Liu, 1965, nom. illeg.
         03 Family †Eugaleaspidae Liu, 1980 see Family Eugaleaspididae Liu, 1980, nom. praeval.
         04 Family †Nanpanaspidae Liu, 1975 see Family Nanpanaspididae Liu, 1975, nom. praeval.
         05 Family †Polybranchiaspidae Liu, 1965 see Family Polybranchiaspididae Liu, 1965, nom. praeval.
         06 Family †Hunanaspidae see Family Huananaspididae Liu, 1973, nom. praeval.
         07 Family †Duyunolepidae see Family Polybranchiaspididae Liu, 1965, nom. praeval.
         08 Family †Lungmenshanaspidae see Family Huananaspididae Liu, 1973, nom. praeval.
         09 Family †Tridensaspidae Liu, 1986 see Family Eugaleaspididae Liu, 1980, nom. praeval.
         10 Family †Dayongaspidae Pan, 1985 see Family Dayongaspididae Pan & Zeng, 1985, nom. praeval.