Order Rodentia - Family Geomyidae Author Wilson, Don E. Author Reeder, DeeAnn text 2005 The Johns Hopkins University Press Baltimore Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2 859 870 book chapter 0-8018-8221-4 10.5281/zenodo.7316535 Thomomys (Thomomys) mazama Merriam 1897 Thomomys (Thomomys) mazama Merriam 1897 , Proc. Biol. Soc. Wash., 11: 214 . Type Locality: USA , Oregon , Klamath Co., Anna Creek near Crater Lake, Mt. Mazama, 6,000 ft. ( 1,829 m ). Vernacular Names: Western Pocket Gopher . Subspecies: : Subspecies Thomomys (Thomomys) mazama subsp. mazama Merriam 1897 Subspecies Thomomys (Thomomys) mazama subsp. couchi Goldman 1939 Subspecies Thomomys (Thomomys) mazama subsp. glacialis Dalquest and Scheffer 1942 Subspecies Thomomys (Thomomys) mazama subsp. helleri (Elliot 1903) Subspecies Thomomys (Thomomys) mazama subsp. hesperus (Merriam 1901) Subspecies Thomomys (Thomomys) mazama subsp. louiei Gardner 1950 Subspecies Thomomys (Thomomys) mazama subsp. melanops (Merriam 1899) Subspecies Thomomys (Thomomys) mazama subsp. nasicus ( Merriam 1897 ) Subspecies Thomomys (Thomomys) mazama subsp. niger (Merriam 1901) Subspecies Thomomys (Thomomys) mazama subsp. oregonus Merriam 1901 Subspecies Thomomys (Thomomys) mazama subsp. premaxillaris Grinnell 1914 Subspecies Thomomys (Thomomys) mazama subsp. pugetensis Dalquest and Scheffer 1942 Subspecies Thomomys (Thomomys) mazama subsp. tacomensis Taylor 1919 Subspecies Thomomys (Thomomys) mazama subsp. tumuli Dalquest and Scheffer 1942 Subspecies Thomomys (Thomomys) mazama subsp. yelmensis Merriam 1899 Distribution: NW Washington through C Oregon to N California ( USA ). Conservation: U.S. ESA and Washington Department of Fish and Game – Candidate; IUCN – Extinct as T . m. tacomensis ; Critically Endangered as T . m. louiei ; Vulnerable as T . m. couchi , T . m. glacialis , T . m. pugetensis , T . m. tumuli , and T . m. yelmensis ; Lower Risk (nt) as T. mazama and as T . m. helleri and T . m. melanops . Discussion: Subgenus Thomomys . Revised by Johnson and Benson (1960) ; considered a subspecies of monticola by Bailey (1915) and Hall and Kelson (1959) but geographic sympatry with monticola in N California documented by Thaeler (1968 a ) . Subspecies listed in Hall (1981:465-467) . Reviewed by Verts and Carraway (2000 , Mammalian Species No. 641).