Family SCIURIDAE Fischer, 1817

Flying squirrels appearing in Korea were formerly grouped into a distinct Family Pteromyidae but all are currently treated under the Tribe Pteromyini in the Subfamily Sciurinae (Thorington et al. 2012) . Four genera and four species have usually been listed in Korea. A skin of the Japanese giant flying squirrel, Petaurista leucogenys, purchased at Seoul in 1920 became the basis for listing this species as a Korean mammal (Kuroda & Mori 1923). An erroneous report had this squirrel captured at Naemujae, Mt. Geumgang, but this locality did not occur within the distribution, and it was an implausible record (Won 1967, 1968). The presence of Japanese giant flying squirrels in Korea remains doubtful, and the skin was regarded as imported from another country (Won & Smith 1999).