Arvicola amphibius (Linnaeus, 1758)

Type locality: England .

Notes: The oldest available species group name in the genus, which is based on large, orthodont and strictly aquatic water voles (Miller 1912) with 36 chromosomes. Precedence of amphibius over terrestris is legitimized by the Principle of the First Reviser (Article 24.2. of the International Code of Zoological Nomenclature, 4th ed.) and follows Blasius (1857) (cf. Corbet 1978).