Vertebrata Cuvier, 1812 - vertebrates
   Class Agnatha Cope, 1889 [paraphyletic]
     Subclass †Pteraspidomorphi Goodrich, 1909 see Class Pteraspidomorphi Goodrich, 1909
       Order †Heterostraci Lankester, 1868 - heterostracans see Subclass Heterostraci Lankester, 1868
         ?Family †Arandaspididae Ritchie & Gilbert-Tomlinson, 1977
           1 Genus †Anatolepis Bockelie & Fortey, 1976
           2 Genus †Arandaspis Ritchie & Gilbert-Tomlinson, 1977
           3 Genus †Porophoraspis Ritchie & Gilbert-Tomlinson, 1977