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
         Suborder †Dinocephalia Seeley, 1894 see [unranked] Dinocephalia Seeley, 1894
           1 Family †Titanosuchidae Olson, 1962
           2 Family †Tapinocephalidae Olson, 1962