4. Chaetogaster diaphanus (Gruithuisen, 1828)

Nais diaphanus Gruithuisen, 1828

Geographic distribution.

Cosmopolitan species. In the Russian tundra: Murmansk Region (Finogenova 1975; Timm and Popchenko 1978), the Solovetsky Islands (Popchenko 1972), Vaygach Island (Leshko et al. 2008), the Pechora River delta (Baturina 2018), 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 More-yu River basin, Lake Bolshoy Ngosovey (Baturina and Loskutova 2010), the Ob River delta (Timm and Abarenkov 2018), the northern part of Western Siberia (Zaloznyj 1984), the Yamal Peninsula (Stepanov 2016).

Location.

Lake Bolshoy Kharbey (67°34'34.3"N, 62°52'17.4"E; 67°33'48.2"N, 62°55'2.6"E; 67°32'49.4"N, 62°53'6.6"E; 67°31'49.9"N, 62°52'40.1"E); Lake L (67°35'46"N, 62°49'44.8"E); Lake K1 (67°36'17.6"N, 62°52'35"E); Lake Golovka (67°35'50"N, 62°55'25.3"E).

Ecology.

The species inhabits various sites with rocky, sandy, and vegetative substrates (depths 0.3-4.2 m).