Phylum [Vertebrata] Lamarck, 1801 see Infraphylum 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 Artiodactyla Owen, 1848 - even-toed ungulates see Order Cetartiodactyla Montgelard, Catzeflis & Douzery, 1997
               Suborder Ruminantia Scopoli, 1777
                 Family Bovidae Gray, 1821 - antelope, cattle, bison, buffalo, goats, and sheep
                   1 Genus Bos Linnaeus, 1758 - oxen
                   2 Genus †Pelorovis Reck, 1925