Sigmodon arizonae Mearns, 1890 . Bull. Am. Mus. Nat. Hist., 2:287.

TYPE LOCALITY: U.S.A., Arizona, Yavapai Co., Fort Verde .

DISTRIBUTION: Nayarit (Mexico) to S. and C. Arizona, S. Nevada, and S.E. California (U.S.A.).

COMMENT: Formerly included in hispidus; see Zimmerman, 1970, Publ. Mus. Mich. St. Univ. Biol. Ser., 4(9):385-454, and Severinghaus and Hoffmeister, 1978, J. Mammal., 59:868-870.

ISIS NUMBER: 5301410008054003001.