Microtus kirgisorum (Ognev, 1950) . [Mammals of USSR and Adjacent Countries], 7:219.

TYPE LOCALITY: Kazakhstan, Tuyouk, Khirgiski Mtns .

DISTRIBUTION: Recorded from S Kazakhstan, Kirghizia, Tadzhikistan, and SE Turkmenistan; may also occur in N Afghanistan.

COMMENTS: Subgenus Microtus, arvalis species group sensu Zagorodnyuk (1990) . Originally described as a subspecies of M. arvalis but later elevated to a separate species (Meier, 1983; Meier et al., 1981), as observed by Corbet (1984) and Pavlinov and Rossolimo (1987). Chromosomal data presented by Orlov et al. (1983) in context of phylogenetic study among members of the M. arvalis group.