Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Infraclass Eutheria Gill, 1872
       Magnorder Boreoeutheria Springer & de Jong, 2001
         Superorder Laurasiatheria Waddell, Okada & Hasegawa, 1999
           Order Cetartiodactyla Montgelard, Catzeflis & Douzery, 1997
             Suborder Ruminantia Scopoli, 1777
               Infraorder Pecora Linnaeus, 1758
                 1 Family Antilocapridae Gray, 1866 - pronghorn
                 2 Family Giraffidae Gray, 1821 - okapi and giraffe
                 3 Family Cervidae Batsch, 1788 - deer
                 4 Family Moschidae Gray, 1821 - musk deer
                 5 Family Bovidae Gray, 1821 - antelope, cattle, bison, buffalo, goats, and sheep