Genus Rattus Fischer, 1803

Rattus has become a taxonomically confusing genus. Musser and Carleton (2005) supported six forms or species groups. The Rattus norvegicus and R. tanezumi species groups inhabit Korea. Because of recent taxonomic debates (Heaney & Molur 2016), whether R. rattus and R. tanezumi coexist or only R. tanezumi inhabits Korea remains uncertain. Although there is a little possibility of coexisting R. rattus and R. tanezumi in Korea, we suggest populations of R. tanezumi instead of R. rattus live in Korea. Therefore, we delitsted R. rattus and assigned two species accounts for the Genus Rattus in Korea.