Two new species of Neuratelia Rondani (Diptera: Mycetophilidae) from Chukotka, North-East Russia Author Polevoi, A. V. text Far Eastern Entomologist 2023 2023-01-08 469 13 20 http://dx.doi.org/10.25221/fee.469.3 journal article 10.25221/fee.469.3 2713-2196 7616286 EA5F1F68-39B9-4368-83DB-9411C5992F87 Neuratelia aculeata Polevoi , sp. n. https://zoobank.org/NomenclaturalActs/ 4EDF31CE-B47C-4D78-8B3A-C3D2CCD0B6F7 Figs 1–7 TYPE MATERIAL . Holotype – ♂ , Russia : Chukotka Autonomuos District , Anadyr River, 30 km lower Krasnoe Lake, 64.72°N , 175.21°E , h= 10 m , yellow pan trap, 27. VI – 19.VII 2014, leg. A. Barkalov [ SZMN ]. Paratypes : same data as holotype, 4 ♂ [ SZMN ] . OTHER MATERIAL EXAMINED. Russia : same data as holotype, 2 ♂ [ TMU , TSZD-JKJ- 111780, TSZD-JKJ-111781]. DIAGNOSTIC CHARACTERS. Medium-sized species with black body, yellow legs and transparent wings ( Fig. 1 ). New species is similar to Neuratelia nemoralis ( Meigen, 1818 ) by the structure of male terminalia, but distinguished by the shape of gonostylus, especially by its acute apical process. DNA BARCODE BIN REGISTRY. Assigned to BIN BOLD : ACJ6170 along with N. nemoralis and N. salmelai Kurina, Õunap et Põldmaa, 2015 , with distance 4.85% to the nearest BIN ( BOLD , 2022a . DESCRIPTION. Male (n=5). Head black. Three ocelli in a shallow triangular arrangement. Lateral ocellus separated from eye margin by a distance 1.1–1.5 of its diameter. Face almost parallel-sided, clypeus transverse, more than two times wider than high, both with dense yellowish-brown hairs. Mouthparts brown, palpi yellow. Antenna dark brown except yellow pedicel, first flagellomere and base of second flegellomere. Sometimes first flagellomere darkened apically and second flagellomere completely dark. Flagellum evenly tapering to apex. Fifth flagellomere 1.5–2.3 times as long as broad. Thorax. Mesonotum black, but narrowly yellow in humeral and postalar area, thinly dusted with three shining longitudinal stripes, which may look partly fused. Scutellum and pleurae black. Laterotergite with setae and mediotergite with setae in lower part. Halter yellow. Fig 1. Neuratelia aculeata sp. n. , male habitus, lateral view. Scale bar: 2 mm. Wing. Length 4.56–5.09 [4.87] mm. Membrane with micro- and macrotrichia. Veins brownish, costal and radial veins somewhat darker. Veins setose, except bare basal part of Sc, M-stem, radial-medial (r-m) and basal transversal (tb) crossveins. Costa produces slightly beyond the tip of R5. Sc reaches costa at about one fifth between Rs and tip of R1. Sc-r placed well before the middle of Sc. R5 sinuate. Rs about as long as cross-vein r-m. M1 basally obsolete. Base of posterior (M 4 -CuA) fork lies distally to r-m and proximally to the apex of Sc. Legs. Coxae yellow, hind coxa basally slightly darkened. Trochanters brown. Fore femur yellow, mid and hind femora narrowly darkened antero-ventrally at apex. Tibiae and tibial spurs yellow, tarsi seem darker because of dense hairs. Fore tibia with 1–2 ad and 1–2 pd. 0– 3 pv. Mid tibia with 1–3 av, 2–7 ad, 0–2 pd, 2–5 pv and 0–3 v. Hind tibia with 7–13 ad, 6–13 pd, 3– 6 p. Ratio of tibia to basitarsus for fore, mid and hind leg: 1.06–1.15 [1.10]; 1.33–1.46 [1.41]; 1.68–1.82 [1.76]. Abdomen dark brown with yellowish brown hairs. Terminalia brown. Gonocoxite with dorsoapical lobe protruding caudoventrally, attenuated in lateral view and parallel-sided, but suddenly narrowed before apex, in ventral view ( Figs 2, 4 ). Ventral margin of gonocoxite with horn-like ventoapical lobes and rounded submedian lobes, both covered with setae ( Fig. 2 ). Tergite 9 wider than high, with evenly rounded apical margin and wide triangular basal incision about a half of tergite height. Cerci well-developed, protruding over tergite 9 ( Fig. 3 ). Gonostylus more or less trapezoid with acute apical process, which is almost half as long as basal part of the gonostylus ( Fig. 5 ). Parameres long, significantly protruding over ventroapical margin of gonocoxite, slightly widened and bent dorsally in the apical third, then attenuated to apices ( Figs 2, 6, 7 ). HABITAT AND BIOLOGY. Adults collected in hummocky tundra along the river bank. Larval biology unknown. DISTRIBUTION. So far known only from the type locality in the North-East Russia . ETYMOLOGY. The Species epithet (from Latin aculeatus – having a stinger, prickle) refers to aculeate gonostylus.