Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
             Class Mammalia Linnaeus, 1758 - mammals
               Subclass Eutheria Gill, 1872 see Infraclass Eutheria Gill, 1872
                 Superorder Protungulata
                   Order †Condylarthra Cope, 1881
                     Superfamily †Periptychoidea (Cope, 1882) Kalandadze & Rautian, 1992 see Family Periptychidae Cope, 1882
                       Family †Periptychidae Cope, 1882
                         Genus †Ectoconus Cope, 1884
                         Genus †Periptychus Cope, 1881
                         1 Genus †Carsioptychus Simpson, 1936 see Genus Periptychus Cope, 1881