Genus Microtus Schrank, 1798

Blanfordimys, Chiomonys, Lasiopodomys, Neodon, Phaiomys, and Proedromys were regarded as synonyms of Microtus, but all are now classified as distinct genera. Although Conroy and Cook (2000) recognized the Subgenus Alexandromys for the Asian clade of Microtus based on mtDNA, Jaarola et al. (2004) did not support a distinct subgenera for the Asian lineage (including Alexandromys, Pallasiinus and Volemys). Galewski et al. (2006) considered Alexandromys a distinct subgenus of Microtus based on a combined analysis of cytochrome b and a nuclear gene (exon 10 of growth hormone receptor). Although Pavlinov and Khlyap (2012) treated Alexandromys as a distinct genus, mammologists frequently considered Alexandromys as a subgenus of Microtus (Lemskaya et al. 2015) . Since no taxonomic consensus exists, we followed Musser and Carleton (2005) in considering that the reed vole in Korea is Microtus fortis .