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 †Gorgonopsia Seeley, 1894 see [unranked] Gorgonopsia Seeley, 1894
           Family †Gorgonopsidae Lydekker, 1890
             Genus †Lycaenops Broom, 1925