Invasion of Microtus rossiaemeridionalis into the Territory of the Russian Far East

In this study, we report the first case of observation of the East European vole Microtus rossiaemeridionalis Ognev, 1924 in the south of the Russian Far East, Khabarovsk krai, in urbanized biotopes in the vicinity of the city of Sovetskaya Gavan and two adjacent rural settlements. The species was identified by karyological characteristics—2n = 54, NF = 56, C-banding—and morphological characteristics—body, cranium, baculum, and spermatozoa.