Mammaliaformes Rowe 1988
   [crown] Class Mammalia Linnaeus, 1758 - mammals
     Subclass Theriiformes Rowe, 1988 see Division Theriiformes Rowe, 1988
       Infraclass Holotheria Wible, Rougier, Novacek, McKenna & Dashzeveg, 1995 see Clade Holotheria Wible, Rougier, Novacek, McKenna & Dashzeveg 1995
         Superlegion Trechnotheria McKenna, 1975 see Clade Trechnotheria McKenna 1975
           Legion Cladotheria McKenna, 1975 see Clade Cladotheria McKenna 1975
             Sublegion Zatheria McKenna, 1975 see Clade Zatheria McKenna 1975
               Infralegion Tribosphenida McKenna, 1975 see Subclass Boreosphenida Luo, Cifelli & Kielan-Jaworowska, 2001
                 [crown] Supercohort Theria Parker & Haswell, 1897 - therians see Subclass Theria Parker & Haswell, 1897
                   Cohort Placentalia Owen, 1837 - placentals
                     Magnorder Epitheria McKenna, 1975 see Cohort Placentalia Owen, 1837
                       Superorder Preptotheria McKenna, 1975
                         Grandorder Ungulata Linnaeus, 1766
                           Mirorder Eparctocyona McKenna, 1975
                             Order Artiodactyla Owen, 1848 - even-toed ungulates see Order Cetartiodactyla Montgelard, Catzeflis & Douzery, 1997
                               Suborder Ruminantia Scopoli, 1777
                                 Superfamily Cervoidea Batsch, 1788
                                   Family Antilocapridae Gray, 1866 - pronghorn
                                     Subfamily Antilocaprinae Gray, 1866
                                       01 Genus †Subantilocapra Webb, 1973
                                       02 Genus †Osbornoceros Frick, 1937
                                       03 Genus †Ilingoceros Merriam, 1909
                                       04 Genus †Sphenophalos Merriam, 1909
                                       05 Genus †Texoceros Frick, 1937
                                       06 Genus †Hayoceros Frick, 1937
                                       07 Genus †Hexobelomeryx Furlong, 1941
                                       08 Genus †Ottoceros Miller & Downs, 1974
                                       09 Genus †Plioceros Frick, 1937
                                       10 Genus †Hexameryx White, 1941
                                       11 Genus †Proantilocapra Barbour & Schultz, 1934
                                       12 Genus †Ceratomeryx Gazin, 1935
                                       13 Genus †Capromeryx Matthew, 1902
                                       14 Genus †Tetrameryx Lull, 1921
                                       15 Genus †Stockoceros Frick, 1937
                                       16 Genus Antilocapra Ord, 1818 - pronghorn