Kuatunia nordica Tshernyshev 2012, sp. n.

Kuatunia nordica Tshernyshev, 2012 sp. n.

(Figs. 1–6, 14)

Type material. Holotype, male: RUSSIA: Krasnoyarskiy Krai, Taimyrskiy Nationalnyi Okrug, 76 km SE Khatanga vill., Bavushnyi Spring, 71°24'N – 103°04'E, 3.VII.2010, V.K. Zinchenko leg. (SZMN); paratype, female: Russia, Yakutia, near Yakutsk, 22.VI.1927, Moskvin leg. (ZISP).

“Красноярский край, Таймырский НО, 76 км ЮВ п. Хатанга, р. Котуй, руч. Бавушный, 71º24’N 103ºE, 3.7.2010, В.К. Зинченко” (SZMN); “Якутск, 22.VI. [1]927, Москвин (ZISP)”

Description. Holotype, male (Fig. 1). Body elongate, oblong.

Head black with yellow distal part near antennal insertion. Antennae completely yellow. Pronotum, scutellum and elytra black. Underside dark with yellow joining membrane; legs yellow with femora dark on the basal fourth, coxa and trochanters dark. Surface evenly covered with sparse, fine and depressed light pubescence. Vesicles yellow; thoracic mesepimera brown.

Head narrower than pronotum, front flat; genae short and straight; clypeus narrow, transverse, straight; labrum short, transverse; palpi simple with cylindrical apical segment; surface of head slightly shining, punctures sparse and fine, microsculpture indistinct, pubescence short, light and depressed.

Antennae filiform, 1.2 mm long, reaching the apical third of elytra; segment 1 oblongo-clavate, 2nd rounded, 3rd subtriangular, the remaining segments cylindrical, apical segment longer than the previous and evenly sinuate at apex; surface evenly covered with short, light erect pubescence.

Pronotum transverse; anterior margin very slightly convex; posterior margin arched; lateral sides evenly rounded and slightly impressed posteriorly; surface very sparsely punctured, with distinct microsculpture, shiny, with dense fine depressed pubescence.

Scutellum small, rectangular, densely punctured and covered with sparse pubescense, shining.

Elytra oblong, widened at the middle and narrowed posteriorly, base slightly wider than the pronotum; humeri distinct, but not protruding; apices evenly rounded and deeply impressed dorsally, with incrassate flexure curved dorsally and anteriorly (Figs 2, 3); surface shining, densely punctured, covered with short fine depressed pubescence.

Hind wings developed normally.

Legs moderate in length, thin; posterior femora not reaching the elytral apices; tibiae thin, straight; femora slightly compressed; all tarsi 5-segmented, narrow, second segment in anterior tarsi with the comb above; fifth segment longest, 1.5 time longer than the 1st protarsomere, and approximately equal in length to tarsomeres 1 and 2 combined, in intermediate and posterior legs; claws narrow, short, with basal membrane.

Ventral surface of body densely punctured, with sparse, fine depressed pubescence; apical tergite almost equilateral, evenly rounded and shortly emarginate at apex (Fig. 4); ultimate sternite transverse, 2.3 times wider than long, narrow, evenly rounded at apex and deeply emarginate in the middle (Fig. 5); aedeagus simple (Fig. 7), without spines or denticles in an internal sack, covered by tegmen (Fig. 6).

Length 2.1 mm, width (at elytral base) 0.8 mm.

Female. Differs from male by somewhat shorter and slender antennae, absence of comb in anterior tarsi, elytra strongly widened posteriorly, and truncate at the apex; length 2.1 mm, width (at elytral base) 0.9 mm.

Etymology. The name of the new species reflects the northernmost distribution of species within the genus Kuatunia.

Habitat. The male was collected in a trap containing decaying organic matter, designed to capture necrobiont beetles. The trap was mounted on the bank of a small river, and, very probably, this species inhabit biotopes near water reservoirs. Specific aspects of its bionomy are unknown.

Distribution. Northeastern Russia: Yakutia, Taimyr peninsula (Fig. 14).