Cladotanytarsus saetheri sp. nov. and C. gedanicus Giłka: Holarctic sibling species (Diptera: Chironomidae)

Cladotanytarsus saetheri , sp. nov., a widely distributed species (Fennoscandia; Russia: Far East; Canada: Manitoba; USA: Colorado, Michigan, South Carolina, Wisconsin) is described and compared with C. gedanicus Gilka, 2001 on the basis of new records (Fennoscandia; Canada: Manitoba, Nunavut; USA: Colorado, New Mexico). Intraspecific morphological variability of adult males is presented in order to delimit the two previously misidentified species.