Spermophilus armatus Kennicott, 1863 . Proc. Acad. Nat. Sci. Philadelphia, 15:158.

TYPE LOCALITY: "In the foothills of the Uinta Mountains, near Fort Bridger, [Uinta Co.] Wyo[ming]." [USA].

DISTRIBUTION: SC Utah to S Montana, SE Idaho to W Wyoming (USA).

COMMENTS: Subgenus Spermophilus (Hall, 1981:386) .