Dipodomys ordii cupidineus [Goldman]
Dipodomys ordii cupidineus [Goldman], Journ. Washington Acad. Sci., 14:372, September 19, 1924.
Type.—Male, no. 243093, U. S. Nat. Mus. Biol. Surv. Coll.; Kanab Wash, at southern boundary of Kaibab Indian Reservation, Arizona; obtained on October 12, 1922, by E. A. [Goldman], original no. 23384.
Range.—Northeastern Arizona and south-central Utah; marginal occurrences are: in Utah, Escalante, near Paria and S of Virgin; in Arizona, 6 mi. N Wolf Hole, 20 mi. S Wolf Hole, 5 mi. S Trumbull Spring and 10 mi. S Jacobs Pools in Houserock Valley.
Diagnosis.—Size large (see measurements). Color relatively dark, entire dorsal surface between (16") Pinkish Cinnamon and Cinnamon-Buff, purest on sides and flanks, upper parts washed with black; arietiform markings, pinnae of ears, dorsal and ventral stripes of tail, plantar surfaces of hind feet, blackish. Skull large; auditory bullae well inflated; interorbital width relatively narrow; rostrum long and narrow; nasals long and slightly flared distally; pterygoid fossae ovoid; external auditory meatus small and ovoid; jugal light and relatively straight.
Comparisons.—From Dipodomys ordii chapmani, D. o. cupidineus differs in: Size larger; color lighter in all pigmented areas; skull larger; rostrum shorter and wider; nasals shorter; auditory bullae more inflated, particularly median tympanic portion; least interorbital width less.
From Dipodomys ordii nexilis, D. o. cupidineus differs as follows: Size smaller; color lighter in all pigmented areas; skull smaller; rostrum relatively longer and narrower; least interorbital width less; auditory bullae less inflated; breadth across maxillary arches less; foramen magnum circular as opposed to ovoid; cutting edge of upper incisors narrower; zygomatic arches lighter.
For comparisons with Dipodomys ordii cinderensis, Dipodomys ordii panguitchensis and Dipodomys ordii longipes see accounts of those subspecies.
Remarks.-This subspecies is prevented from intergrading, to the east, with D. o. longipes by the deep canyons of the Colorado River, with D. o. cinderensis by the Virgin River and with D. o. panguitchensis by a series of high mountain ranges. Intergradation does, however, occur with D. o. sanrafaeli in animals from Escalante, Garfield County, Utah, but they are referable to D. o. cupidineus. The Colorado River, farther to the north, again serves as a barrier in preventing intergradation between D. o. nexilis and D. o. cupidineus.