The Southwest China vole (Eothenomys custos), or Southwest China red-backed vole, is a species of rodent in the family Cricetidae. It is found only in Yunnan and Sichuan, China. It occurs in Cangshan Erhai Nature Reserve.
References
Musser, G. G. and M. D. Carleton. 2005. Superfamily Muroidea. pp. 894–1531 in Mammal Species of the World a Taxonomic and Geographic Reference. D. E. Wilson and D. M. Reeder eds. Johns Hopkins University Press, Baltimore.