Dicrostonyx nunatakensis Youngman, 1967 . Proc. Biol. Soc. Washington, 80:31.

TYPE LOCALITY: Canada, Yukon Territory, Ogilvie Mtns, 20 mi S Chapman Lake, 5500 ft; 64°35'N, 138°13'W .

DISTRIBUTION: Known only from the Ogilvie Mtns, NC Yukon Territory, Canada.

COMMENTS: As remarked by Youngman (1967), this form contrasts markedly with nearby rubricatus and kilangmiutak; tentatively retained as a species by Honacki et al. (1982).