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 Microtus transcaspicus Satunin, 1905 . Izv. Kavkas. Mus., 2:57 . TYPE LOCALITY: Turkmenistan , Kopet Dag Mtns, Chuli Valley, near Ashkhabad . DISTRIBUTION: S Turkmenistan , N Afghanistan , and N Iran . SYNONYMS: khorkoutensis. COMMENTS: Subgenus Microtus , arvalis species group sensu Zagorodnyuk (1990) . Taxonomy reviewed by Gromov and Polyakov (1977) , Corbet (1978c) , Malygin (1978) , Meier et al. (1981), and Meier (1983).