Phylum [Vertebrata] (Lamarck, 1801)
   Class Agnatha Cope, 1889
     Subclass †Cephalaspidomorphi Moy-Thomas & Mile, 1971 see Class Agnatha Cope, 1889
       Order †Anaspida Traquair - anaspids see Class Anaspida Traquair
         1 Genus †Jamoytius White, 1946
         2 Genus †Pharyngolepis Kiaer, 1911