The Richardson's Water Vole, found in North America, belongs to which genus?
Answer
*Microtus*
In contrast to the Eurasian species, the North American counterpart known as the Richardson's Water Vole, formally *Microtus richardsoni*, is classified under the genus *Microtus*. This placement indicates a separate evolutionary path from the *Arvicola* lineage, despite both groups occupying similar semi-aquatic niches. The genus *Microtus* is extensive, encompassing many common meadow voles. The fact that *M. richardsoni* shares the common name 'water vole' with *Arvicola amphibius* illustrates the difference between ecological convergence and strict evolutionary classification; nomenclature reflects genetic lineage, while common names often reflect shared habitat preference.

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