Sciurus aberti Woodhouse, 1853 . Proc. Acad. Nat. Sci. Philadelphia, 1852, 6:110, 220 [1853].

TYPE LOCALITY: "...in the San Francisco Mountains, New Mexico " [= Coconino Co., Arizona, USA] .

DISTRIBUTION: SE Utah, S and W Colorado, extreme SE Wyoming, W and C New Mexico, and Arizona (USA); Chihuahua, Durango, and Sonora (NW Mexico).

SYNONYMS: barberi J. Allen, 1904; castanonotus Baird, 1858; castanotus Baird, 1855; chuscensis Goldman, 1931; concolor True, 1894; dorsalis Woodhouse, 1853; durangi Thomas, 1893; ferreus True, 1900; kaibabensis (Merriam, 1904); mimus Merriam, 1904; navajo Durrant and Kelson, 1947; phaeurus J. Allen, 1904.

COMMENTS: Subgenus Otosciurus (Hall, 1981:434) . Includes kaibabensis (Hoffmeister and Diersing, 1978). Reviewed by Nash and Seaman (1977, Mammalian Species, 80). Post­Pleistocene dispersal analyzed by Davis and Brown (1989).