Arvicola amphibius italicus Savi, 1838

Type locality: Vicinity of Pisa, Italy .

Notes: Well-defined form of large, orthodont, and strictly aquatic water voles with 36 chromosomes. For 1838 as the year of publication (instead of 1839; cf. Miller 1912) see Gippoliti (2012). Range is restricted to peninsular Italy (Amori et al. 2008b) and Canton Tessin in Switzerland (Meylan and Saucy 1995); borders are not resolved.