Phylum Chordata Bateson, 1885 - chordates
   Subphylum Vertebrata Cuvier, 1812 - vertebrates
     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 †Cynodontia Owen, 1861 - cynodonts see Clade Cynodontia Owen 1861 [Gauthier, Kluge & Rowe 1988]