Microtus mujanensis Orlov and Kovalskaya, 1978 . Zool. Zh., 57: 1224.

TYPE LOCALITY: U.S. S. R., Buryat-Mongolsk. A.S.S. R., Bauntovsk. Obi., Miyha River at Miyha .

DISTRIBUTION: Known only from the type locality.

COMMENT: Subgenus Microtus; (RSH from V. G. Orlov, pers. comm.); Orlov and Kovalskaya, 1978, Zool. Zh., 57: 1224- 1232, described this species as morphologically close to maximowiczii, but the species are karyotypically different and Fl hybrids are sterile (SRL). Gromov and Baranova, 1981:209, indicated that the name is based on an earlier publication (Orlov and Kovalskaya, 1975, [Systematics and cytogenetics of mammals], Moscow, p. 32); which may be a nomen nudum (RSH).