Class Mammalia Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Suborder Sciurognathi (Tullberg, 1899) see Suborder Sciuromorpha Brandt, 1855
       Family Sciuridae Batsch, 1788 - squirrels, chipmunks, marmots, and prairie dogs
         Subfamily Sciurinae Batsch, 1788 - tree and ground squirrels
           Genus Cynomys Rafinesque, 1817 - prairie dogs
             1 Cynomys gunnisoni (Baird, 1855) - Gunnison's prairie dog
             2 Cynomys leucurus Merriam, 1890 - white-tailed prairie dog
             3 Cynomys ludovicianus (Ord, 1815) - black-tailed prairie dog
             4 Cynomys mexicanus Merriam, 1892 - Mexican prairie dog
             5 Cynomys parvidens J.A. Allen, 1905 - Utah prairie dog
             6 Subgenus Leucocrossuromys Hollister, 1916
             7 Subgenus Cynomys Rafinesque, 1817