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 †Anomodontia Owen, 1859
         1 Family †Venyukoviidae Efremov, 1940
         2 Family †Ostheriidae
         3 Family †Dicynodontidae Owen, 1860
         4 Family †Cistecephalidae (Broom, 1903)
         5 Family †Lystrosauridae Broom, 1903