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Range DescriptionThe species previously ranged across much of the eastern Tibetan Plateau (Koizumi et al. 1993). The species presently occurs in fragmented populations in northwestern and southwestern Gansu, eastern and central, and southern Qinghai, eastern Tibet, western Sichuan, and northwest Yunnan (Ohtaishi and Gao 1990; Yu et al. 1990; Kaji et al. 1989,1993; Schaller 1998; Wu and Wang 1999).