Phylum [Vertebrata] (Lamarck, 1801)
   Class Mammalia Linnaeus, 1758 - mammals
     Subclass Theria Parker & Haswell, 1897
       Infraclass Eutheria Gill, 1872
         Cohort Epitheria McKenna, 1975
           Superorder Ungulata Linnaeus, 1766
             Order †Pantodonta Cope, 1873
               Family †Coryphodontidae Marsh, 1876
                 Genus †Coryphodon Owen, 1845