Lemmus sibiricus (Kerr, 1792). Anim. Kingdom, p. 241.

TYPE LOCALITY: U.S. S. R., R.S.F.S. R., Yamalo-Nenetsk. Nats. Okr., between Polar Ural Mtns, and lower course of Ob River.

DISTRIBUTION: Siberian tundra from White Sea to Chukotka (N. E. Siberia) and Kamchatka; St. George Isl. (Pribilofs) and Nunivak Isl. (Bering Sea); W. Alaska east to Baffin Isl. and Hudson Bay, south in the Rocky Mtns, to C. British Columbia (Canada).

COMMENT: L. obensis is a junior synonym ( L. obensis is retained as a specific name for sibiricus by Gromov et al., 1963, [Mammal Fauna of the U.S. S.R.], 1:1-640, and Flint et al., 1965, [Mammals of the U.S. S.R.], 438 pp.); includes amurensis, nigripes, and trimucronatus; see Rausch, 1953, Arctic, 6:91 -148, Krivosheev, 1971, in Tavrovskii et al., [Mammals of Yakutiya], Rausch and Rausch, 1975, Z. Saugetierk., 40:8-34, and Curry-Lindahl, 1980, Der Berglemming Lemmus lemmus, 140 pp.; for alternative treatment see Corbet, 1978:97, and Sidorowicz, 1964, Acta Theriol., 8:217-226. L. amurensis was retained as a distinct species by Ognev, 1948, [Mammals of the U.S. S.R. and Adj. Count.], vol. 6, Rodents, English Trans., 1963, Gromov et al., 1963, [Mammal Fauna of the U.S. S.R.], 1:1-640, Flint et al., 1965, [Mammals of the U.S. S.R.], 438 pp., and Gromov and Polyakov, 1977:196; while Krivosheev and Rossolimo, 1966, Byull. Mosk. Ova. Ispyt. Prir. Otd. Biol., 71:5- 17, and Rubina et al., 1973, in Kontrimavichus, ed., [Biol. Probl. North], 2:77-80, expressed uncertainty about its taxonomic status. Khvorostyanskaya, 1980:40, in Panteleev, ed., [Rodents. Materials All-Union Conf.], Nauka, Moscow, 471 pp., Chernyavskii, 1980, op cit. p. 131, and Pokrovskii and Makaranets, 1980, op cit. p. 259, provided chromosomal and breeding data supporting specific distinctness. RSH, ML] and OLR treat amurensis as distinct.

ISIS NUMBER: 5301410008079003001 as L. sibiricus.

5301410008079002001 as L. nigripes.