39. Limnodrilus udekemianus Claparede, 1862

Isochaeta virulenta Pointner, 1911

Geographic distribution.

Cosmopolitan species. In the Russian tundra: Murmansk Region (Stalmakova 1969; Veselov 1977; Timm and Popchenko 1978), the Vashutkiny lakes system (Finogenova 1966), Lake Ambarty and some other lakes in the Korotaikha River basin (Popchenko 1978), lakes in the More-yu River basin (Baturina and Loskutova 2010), northern part of Western Siberia and the Yamal Peninsula (Zaloznyj 1984).

Location.

Lake Bolshoy Kharbey (67°33'48.2"N, 62°55'2.6"E; 67°31'38"N, 62°53'2.8"E; 67°32'49.9"N, 62°53'40.1"E).

Ecology.

The species was found on stones with moss or algal cover and clayey ground (depth 1.1-2.0 m). It was not widely distributed in the Kharbey lakes system previously.