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 †Synapsida Osborn, 1903 - synapsids see Class Synapsida Osborn, 1903
               Order †Therapsida Broom, 1905 see [unranked] Therapsida Broom, 1905
                 Suborder †Therocephalia Broom, 1903 see [unranked] Therocephalia Broom, 1903
                   01 Family †Crapartinellidae Mendrez, 1975
                   02 Family †Pristerognathidae Broom, 1908
                   03 Family †Hofmeyriidae
                   04 Family †Lycideopsidae Boonstra, 1934
                   05 Family †Ictidosuchidae Broom, 1903
                   06 Family †Whaitsiidae Haughton, 1918
                   07 Family †Moschorhinidae Brink, 1958
                   08 Family †Ericiolacertidae Watson & Romer, 1956
                   09 Family †Scaloposauridae Broom, 1914
                   10 Family †Simorhinellidae Mendrez, 1975
                   11 Family †Bauridae Broom, 1911 see Family Bauriidae Broom, 1911