Arvicola amphibius variabilis Ognev, 1933

Type locality: Barabinsk steppes Govt. Tomsk, Siberia .

Notes: Large, orthodont, and aquatic water voles. Arvicola terrestris variabilis Ognev, 1933, is preoccupied by Arvicola arvalis form variabilis Rörig et Börner, 1905 (now a junior synonym of Microtus arvalis) and was renamed Microtus terrestris barabensis Heptner, 1948 . This name (sensu Gromov and Erbajeva 1995) is applicable to our samples from Russia (pts. 27–29 on Figure 1).