Phylum [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
         1 Suborder †Eotitanosuchia (Boonstra, 1963)
         2 Suborder †Dinocephalia Seeley, 1894 see [unranked] Dinocephalia Seeley, 1894
         3 Suborder †Gorgonopsia Seeley, 1894 see [unranked] Gorgonopsia Seeley, 1894
         4 Suborder †Dicynodontia Owen, 1859 see [unranked] Dicynodontia Owen, 1859
         5 Suborder †Therocephalia Broom, 1903 see [unranked] Therocephalia Broom, 1903
         6 Suborder †Cynodontia Owen, 1861 - cynodonts see Clade Cynodontia Owen 1861 [Gauthier, Kluge & Rowe 1988]