Dicrostonyx unalascensis Merriam, 1900 . Proc. Wash. Acad. Sci., 2:25.

TYPE LOCALITY: U.S.A., Alaska, Umnak Island .

DISTRIBUTION: Umnak and Unalaska Isis. (U.S.A.).

COMMENT: Includes stevensoni Nelson, 1929; the diploid number is 34 for males and females, and the fundamental number is 54; see Rausch and Rausch, 1972, Z. Saugetierk., 37:372-384. Formerly included in torquatus; see Rausch, 1977, in Sokolov, ed., [Adv. Mod. Theriol.], Acad. Sci. U.S. S.R., Nauka, Moscow, pp. 162- 177; or groenlandicus; see Hall, 1981:837.