Order Rodentia - Family Muridae Author Guy G. Musser Author Michael D. Carleton text 1993 Smithsonian Institution Press Washington and London Editor Don E. Wilson Editor DeeAnn M. Reeder Mammal Species of the World (2 nd Edition) 501 755 book chapter http://doi.org/10.5281/zenodo.7353098 1-56098-217-9 7353098 Clethrionomys sikotanensis (Tokuda, 1935) . Mem. Coll. Sci. Kyoto Imp. Univ., ser. B, 10:241 . TYPE LOCALITY: Russia , Kuril Islands, Sikotan Island . DISTRIBUTION: Islands of Sikotan, Daikoku, and Rishiri ( Imaizumi, 1971 ); limits of insular distribution unresolved. SYNONYMS: microtinus . COMMENTS: Allocated by Corbet (1978c) and Aimi (1980) to C. rufocanus but recognized as a distinct species by Gromov and Polyakov (1977) , Imaizumi (1971 , 1972 ), and Pavlinov and Rossolimo (1987) . The status of microtinus was discussed by Gromov and Polyakov (1977) and Pavlinov and Rossolimo (1987) .