Thomomys bottae planirostris Burt
Thomomys perpallidus planirostris Burt, Proc. Biol. Soc. Washington, 44:38, May 8, 1931.
Thomomys bottae planirostris Hall and Davis, Proc. Biol. Soc. Washington, 47:52, February 9, 1934; Goldman, Proc. Biol. Soc. Washington, 48:156, October 31, 1935; Presnall, Zion-Bryce Mus. Bull., 2:14, January, 1938; Long, Journ. Mamm., 21:176, May 14, 1940.
Thomomys perpallidus aureus Bailey, N. Amer. Fauna, 39:75, November 15, 1915; Barnes, Bull. Univ. Utah, 12 (No. 15):85, April, 1922; Bull. Univ. Utah, 17 (No. 12):100, June, 1927; Woodbury, Ecological Monographs, 3:193, April, 1933.
Thomomys bottae centralis Hall and Davis, Proc. Biol. Soc. Washington, 47:52, February 9, 1934; Presnall, Zion-Bryce Mus. Bull., 2:14, January, 1938.
Thomomys perpallidus centralis Hall, Univ. California Publ. Zoöl., 23:445, July 8, 1930.
Thomomys bottae nicholi Goldman, Journ. Washington Acad. Sci., 28:337, July 15, 1938, type from Shivwits Plateau, 20 mi. S Wolf Hole (road to Parashonts), 5,000 ft., Mohave County, Arizona; Hardy, Ecological Monographs, 15:98, January, 1945.
Thomomys bottae trumbullensis Hall and Davis, Proc. Biol. Soc. Washington, 47:52, February 9, 1934.
Type.—Male, adult, skin and skull, No. 8395, Collection of Donald R. Dickey; Zion National Park, Washington County, Utah; May 4, 1920; collected by A. Brazier Howell; original number 2184 (after Burt, type not seen).
Range.—Valley of the Virgin River from Zion National Park west to the Beaverdam Mountains.