Vertebrata Cuvier, 1812 - vertebrates
see Infraphylum Vertebrata Lamarck, 1801
Class Agnatha Cope, 1889 [paraphyletic]
Subclass †Pteraspidomorphi Goodrich, 1909
see Class Pteraspidomorphi Goodrich, 1909
Order †Thelodontida
see Order Thelodonti Jaekel, 1911
Family †Katoporidae Karatajūtė-Talimaa, 1970, nom. illeg.
see Family Katoporodidae Märss, Wilson & Thorsteinsson, 2002