Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Craniata Linnaeus, 1758 see Subphylum Vertebrata Cuvier, 1812
     Class Mammalia Linnaeus, 1758 - mammals
       Subclass Theria Parker & Haswell, 1897
         Infraclass Placentalia Owen, 1837 see Cohort Placentalia Owen, 1837
           Order Artiodactyla Owen, 1848 - even-toed ungulates see Order Cetartiodactyla Montgelard, Catzeflis & Douzery, 1997
             01 Family Camelidae Gray, 1821 - camels, guanaco, llama, alpaca, and vicuña
             02 Family Suidae Gray, 1821 - pigs
             03 Family Tayassuidae Palmer, 1897 (1849) - peccaries
             04 Family Hippopotamidae Gray, 1821 - hippopotamuses
             05 Family Tragulidae Milne-Edwards, 1864 - chevrotains
             06 Family Moschidae Gray, 1821 - musk deer
             07 Family Cervidae Batsch, 1788 - deer
             08 Family Bovidae Gray, 1821 - antelope, cattle, bison, buffalo, goats, and sheep
             09 Family Antilocapridae Gray, 1866 - pronghorn
             10 Family Giraffidae Gray, 1821 - okapi and giraffe