Phylum [Vertebrata] Lamarck, 1801 see Infraphylum Vertebrata Lamarck, 1801
   Class Reptilia Linnaeus, 1758 - reptiles
     Subclass †Synapsida Osborn, 1903 - synapsids see Class Synapsida Osborn, 1903
       Order †Therapsida Broom, 1905 see [unranked] Therapsida Broom, 1905
         Suborder †Dicynodontia Owen, 1859 see [unranked] Dicynodontia Owen, 1859
           1 Family †Galeopsidae
           2 Family †Cistecephalidae (Broom, 1903)
           3 Family †Robertiidae Cluver & King, 1983
           4 Family †Dicynodontidae Owen, 1860
           5 Family †Kannemeyeriidae von Huene, 1948
           6 Family †Lystrosauridae Broom, 1903