Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Class Reptilia Linnaeus, 1758 - reptiles
               Subclass Anapsida Osborn, 1903 - anapsids
                 Order †Cotylosauria Cope, 1880
                   Suborder †Procolophonomorpha Romer, 1964 see Order Procolophonomorpha Romer, 1964
                     1 Family †Nyctiphruretidae Efremov, 1938
                     2 Family †Procolophonidae Lydekker, 1889
                     3 Family †Rhipaesauridae see Family Rhipaeosauridae Chudinov, 1955
                     4 Family †Pareiasauridae Cope, 1896