Coenosia ukokensis Sorokina, 2009

Figs 5 E, F, 7 H, I, 8 E, F

Additional material examined: Russia, 1♂ 1♀, Magadan region, 2 km NW Evensk, 61°55’N 159°16’E, tundra, sweeping grass, 02.vii.2020, leg. N. Tridrikh (SZMN) ; 1♀, the same data but 03.vii.2020; 2 ♂♂ 2 ♀♀, the same data but 08.vii.2020; 1 ♀, the same data but 22.vii.2020; 1 ♀, the same data but in pan trap, 23.vii.2020; 1 ♀, Magadan region, 5 km N Evensk, 61°57’N 159°15’E, poplar forest, sweeping grass, 01.vii.2020, leg. N. Tridrikh (SZMN) ; 1 ♀, the same data but 04.vii.2020; 1 ♀, Magadan region, environs of Garmanda village, 62°10’N 159°04’E, tundra, 13.vii.2020, leg. N. Tridrikh (SZMN) ; 1 ♂, Magadan region, 3 km N Garmanda village, Nizhnyaya Hulakagchan river, 62°72'N 159°06'E, sweeping stones, 15.vii.2020, leg. N. Tridrikh (SZMN) ; 1 ♀, Magadan region, environs of Sokol, 59°54’N 150°47’E, 01.viii.2020, leg. N. Tridrikh (SZMN) .

Comments. A new record for the Far East of Russia.

Coenosia ukokensis was described from Altai Mts and is similar morphologically to the northern Coenosia oralis Schnabl, 1915 . The Altai specimens of Coenosia ukokensis have all tibiae brownish-yellow, darkened in apical 2/3–4/5 (Figs 7 H, I), unlike yellow tibiae of Coenosia oralis . Males of Coenosia ukokensis collected in the Magadan region have all tibiae yellow (Figs 8 E, F) which makes it difficult to distinguish these two species. To correctly identify them, it is necessary to study the male terminalia.

Distribution. Palaearctic: Russia (Siberia, NFE).