Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Artiodactyla Owen, 1848 - even-toed ungulates see Order Cetartiodactyla Montgelard, Catzeflis & Douzery, 1997
       Family Cervidae Batsch, 1788 - deer
         Subfamily Capreolinae Brookes, 1828
           Genus Odocoileus Rafinesque, 1832 - white-tailed deer and mule deer
             Odocoileus hemionus (Rafinesque, 1817) - mule deer
               01 [Odocoileus hemionus hemionus] (Rafinesque, 1817)
               02 Odocoileus hemionus californicus Caton, 1876
               03 Odocoileus hemionus cerrosensis Merriam, 1898
               04 Odocoileus hemionus columbianus (Richardson, 1829)
               05 Odocoileus hemionus eremicus Mearns, 1897
               06 Odocoileus hemionus fuliginatus Cowan, 1933
               07 Odocoileus hemionus inyoensis Cowan, 1933
               08 Odocoileus hemionus peninsulae Lydekker, 1898
               09 Odocoileus hemionus sheldoni Goldman, 1939
               10 Odocoileus hemionus sitkensis (Cowan)