Chionomys

Chionomys is a genus of rodent in the family Cricetidae.

Taxonomy
Mammal Species of the World and the IUCN recognize the following 3 species:
 * Caucasian snow vole (Chionomys gud)
 * European snow vole (Chionomys nivalis)
 * Robert's snow vole (Chionomys roberti)

The American Society of Mammalogists additionally recognizes these two species:
 * Lazistan snow vole (Chionomys lasistanius) split from C. gud
 * Stekolnikov's snow vole (Chionomys stekolnikovi) recently described