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 †Cynodontia Owen, 1861 - cynodonts see Clade Cynodontia Owen 1861 [Gauthier, Kluge & Rowe 1988], nom. cl. inval.
           Family †Traversodontidae Huene, 1936
             Genus †Massetognathus Romer, 1967