Eurasia: all of Europe, including the British Isles. Arctic Ocean drainage, Ob and Yenisei basins, and rarely in Lake Baikal (Ref. 1998).

• 欧亚大陆:所有欧洲；包括不列颠群岛。北极海流域；鄂比河与叶尼塞河流域；而且极少在贝加尔湖.；(参考文献1998