5. Chaetogaster diastrophus (Gruithuisen, 1828)

Nais diastrophus Gruithuisen, 1828

Chaetogaster palustris Pointner, 1914

Geographic distribution.

Cosmopolitan species. In the Russian tundra: Murmansk Region (Finogenova 1975; 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 Kara River basin, lakes in the Malaya Usa River basin (Baturina and Loskutova 2010).

Location.

Lake Bolshoy Kharbey (67°34'3.5"N, 62°52'17.9"E; 67°32'48.3"N, 62°53'49.7"E; 67°33'48.2"N, 62°55'2.6"E; 67°34'34.3"N, 62°52'17.4"E).

Ecology.

The species was recorded on stones with algal cover and on sand, at depths of 0.5-3.8 m.