In some classifications considered synonymous with Microtus

Wikipedia Word definitions in Wikipedia
The water voles are large voles in the genus Arvicola . They are found in both aquatic and dry habitat through Europe and much of northern Asia . A water vole found in Western North America was historically considered a member of this genus, but has been ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Arvicola \Arvicola\ n. a genus of mice in some classifications considered synonymous with {Microtus }. Syn: genus Arvicola .