Colorado: Moffat County: Snake River, south of Sunny Peak, 1 (USBS); 20 mi. NW Sunbeam, 4 (CM); Bear River, Lay, 1 (USBS). Rio Blanco County: W side White River, 1 mi. N Rangely, 1 (CM).
Dipodomys ordii celeripes [Durrant] and [Hall]
Dipodomys ordii celeripes [Durrant] and [Hall], Mammalia, 3:10, March, 1939.
Dipodomys ordii columbianus, [Hall], Univ. California Publ. Zool., 37:5, April 10, 1931.
Type.—Male, adult, no. 1956, Museum of Zoology, University of Utah; Trout Creek, 4600 ft., Juab County, Utah; obtained on May 5, 1937, by Stephen D. [Durrant], original no. 1168.
Range.—Eastern Nevada, western and west-central Utah, east to eastern Sevier County, Utah; marginal occurrences are: in Nevada, Tecoma, Cobre and 8 mi. SE Mt. Moriah; in Utah, E side Clear Lake, U. B. (Yuba) Dam, 10 mi. SW Nephi, and Trout Creek.
Diagnosis.—Size small (see measurements). Color pale, entire dorsal surface Pinkish Buff, purest on sides, flanks and cheeks, with but slight suffusion of black in upper parts; pinnae of ears, plantar surfaces of hind feet, dorsal and ventral stripes of tail, brownish. Skull small; rostrum relatively short and wide; nasals relatively short; lacrimal processes small; braincase but slightly vaulted; auditory bullae but little inflated; interorbital region narrow; styloid processes project on ventral surface of auditory bullae beyond middle of external auditory meatus; zygomatic arches robust and bowed laterally; pterygoid fossae ovoid.
Comparisons.—From Dipodomys ordii marshalli, D. o. celeripes differs as follows: Size smaller, hind foot longer, tail shorter; color lighter; skull smaller; rostrum wider and shorter; interorbital region narrower; auditory bullae less inflated; lacrimal processes smaller; palate shorter; pterygoid fossae larger.
From Dipodomys ordii cinderensis, D. o. celeripes differs as follows: Size smaller, tail shorter; color lighter; rostrum wider and shorter; nasals shorter; interorbital width less; auditory bullae less inflated; foramen magnum wider and shorter; pterygoid fossae more circular.