Class Mammalia Linnaeus, 1758 - mammals
Order Rodentia Bowdich, 1821 - rodents
Suborder Sciurognathi (Tullberg, 1899)
see Suborder Sciuromorpha Brandt, 1855
Family Geomyidae Bonaparte, 1845 - pocket gophers
Genus Thomomys Wied-Neuwied, 1839 - western pocket gophers
01 Thomomys bottae (Eydoux & Gervais, 1836) - Botta's pocket gopher
02 Thomomys bulbivorus (Richardson, 1829) - Camas pocket gopher
03 Thomomys clusius Coues, 1875 - Wyoming pocket gopher
04 Thomomys idahoensis Merriam, 1901 - Idaho pocket gopher
05 Thomomys mazama Merriam, 1897 - western pocket gopher
06 Thomomys monticola J.A. Allen, 1893 - mountain pocket gopher
07 Thomomys talpoides (Richardson, 1828) - northern pocket gopher
08 Thomomys townsendii (Bachman, 1839) - Townsend's pocket gopher
09 Thomomys umbrinus (Richardson, 1829) - southern pocket gopher
10 Subgenus Megascapheus Elliot, 1903
11 Subgenus Thomomys Wied-Neuwied, 1839