Microtus maximowiczii Schrenk, 1859 . Reisen und Forsch. in Amur-Lande St. Petersburg., 1:140.

TYPE LOCALITY: U.S. S. R., R.S.F.S. R., Chitinsk. Obi., upper Amur region, mouth of Omutnaya River .

DISTRIBUTION: Lake Baikal to upper Amur region (U.S. S.R.), E. Mongolia, and N.E. China.

COMMENT: Subgenus Microtus; (= Arvalomys), see Chaline, 1974, and Gromov and Polyakov, 1977:291. Includes ungurensis; formerly included fortis; see Corbet, 1978:114. Reviewed by Meier, 1978, Trudy Zool. Inst., Leningr., 75:3-62, and Orlov et al., 1974, Zool. Zh„ 53: 1391-1396. See comments under kikuchii, montebelli, and sachalinensis .

ISIS NUMBER: 5301410008080046001 as M. ungurensis .