Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
   Class Agnatha Cope, 1889 [paraphyletic]
     Subclass Cephalaspidomorpha see Class Agnatha Cope, 1889
       Order †Anaspida Traquair - anaspids see Class Anaspida Traquair
         1 ?Family †Jaymoytiidae
         2 Family †Birkeniidae Traquair, 1900
         3 Family †Euphaneropsidae Woodward, 1900 see Family Euphaneropidae Woodward, 1900
         4 Family †Endeiolepidae Stensiö, 1939
         5 Family †Lasaniidae Goodrich, 1909 [monotypic] see Family Euphaneropidae Woodward, 1900