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 Tylopoda "Illiger, 1811"
                 Family Camelidae Gray, 1821 - camels, guanaco, llama, alpaca, and vicuña
                   1 Genus †Aepycamelus Macdonald, 1956
                   2 Genus †Camelops Leidy, 1854
                   3 Genus †Oxydactylus Peterson, 1904
                   4 Genus †Poebrotherium Leidy, 1847
                   5 Genus †Procamelus Leidy, 1858
                   6 Genus †Protylopus Wortman, 1898
                   7 Genus †Stenomylus Peterson, 1906
                   8 Genus †Titanotylopus Barbour & Schultz, 1934