Vertebrata Cuvier, 1812 - vertebrates
   Gnathostomata
     Teleostomi
       Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]
         Amniota Haeckel, 1866 [Gauthier, Kluge & Rowe 1988] - amniotes
           Class Reptilia Linnaeus, 1758 [paraphyletic] - reptiles
             Subclass Anapsida Osborn, 1903 - anapsids
               Order †Captorhinida
                 1 Suborder †Captorhinomorpha Watson, 1917
                 2 Suborder †Procolophonia Seeley, 1888 [monotypic] see Clade Procolophonia Seeley 1888 [Laurin & Reisz 1995]
                 3 Suborder †Pareiasauroidea Nopsca, 1928 see Suborder Pareiasauria Seeley, 1888
                 4 Suborder †Millerosauroidea [monotypic] see Order Millerosauria Watson, 1957