Gnorimoschema yakovlevi, Bidzilya, Oleksiy, Huemer, Peter, Nupponen, Kari & Sumpich, Jan, 2019

Bidzilya, Oleksiy, Huemer, Peter, Nupponen, Kari & Sumpich, Jan, 2019, A review of some new or little-known species of the genus Gnorimoschema (Lepidoptera, Gelechiidae) from the Palaearctic region, ZooKeys 857, pp. 105-138 : 105

Gnorimoschema yakovlevi sp. nov. Figs 14-16, 30-31, 41

Gnorimoschema streliciella ( Herrich-Schäffer, 1854) - Li and Bidzilya 2017: 180, figs 14, 38. Misidentification.

Material examined.

Holotype. RUSSIA ♂; Altai Mts., Kuraisky hrebet; 50°16-20'N, 87°50-55'E; 2000-2500 m; 27 Jun. 2000; T. & K. Nupponen leg.; gen. slide 406/16, O. Bidzilya; TLMF Lep 21629; NUPP.

Paratypes. Russia - Altai Republic 2 ♂; Kuraisky hrebet; 50°16-20'N, 87°50-55'E; 2000-2500 m; 27 Jun. 2000; T. & K. Nupponen leg.; TLMF Lep 21630; NUPP; 5 ♂; Kosh-Agach distr., 10 km NE Kosh-Agach village, Kurai Mts. Range, valley of Tabazhok River; 50°05'N, 88°44'E; 2100 m; 02-04 Aug. 2016; P. Huemer & B. Wiesmair leg.; TLMF 2016-020; Gel. 1251♂, P. Huemer, gen. slide 432/16, O. Bidzilya; all TLMF; 1 ♂; Kosh-Agach Distr., Kurai env. (6,5 km SW); 50°10'35"N, 87°53'55"E; 1550 m; grassy steppe; 9-10 Jul. 2014; J. Šumpich leg.; NMPC. - Buryatia Republic 1 ♂; Hamar Daban Mts., Murtoy River, Gusinoe ozero village, 6 km NW; 51°11-13'N, 106°10-12'E; 700 m; forest steppe; 19 Jun. 2002; K. Nupponen leg.; TLMF Lep 21628; genitalia in glycerol vial; NUPP; 1 ♀; pr. Ulan-Ude, 35 km SW Ulan-Ude; 700 m; steppe hill; 17 Jul. 1996; J. Jalava & J. Kullberg leg.; gen. slide 69/18, O. Bidzilya; MZH.

Description.

Adult. Male (Figs 14-15). Wingspan 12.1-13.8 mm. Head brown, frons dirty white; segment II of labial palpus brown, outer surface white in basal 1/3-2/3, inner surface white, with brush of modified scales on underside, segment III black with white base half on lower side, acute, scape black with rare white tipped scales, flagellum blackish-brown grey-ringed; thorax and tegulae covered with brown grey-edged apically scales; forewing covered with black white-tipped scales, sub-costal vein and fold mottled with brown to half length, three black spots edged with brown in fold and in cell, black streak in base of fold, distinct white sub-apical fascia on 2/3 length, subapical 1/3 brown except for termen covered with black white-tipped scales, fringe grey; hindwing and fringe light grey.

Female (Fig. 16). Wingspan 11.8 mm. As male, but hindwing narrowed in apical 1/3, apical excavation less distinct compared to male.

Male genitalia (Figs 30-31). Uncus sub-rectangular, apex triangular, pointed; gnathos weakly curved, of even width, apex weakly pointed; tegumen moderately broad, anteromedial emargination triangular, extending to about half length of tegumen; valva broad at basal 1/3, then curved, apex rounded or weakly pointed; sacculus long, straight, as broad as valva in mid length, distal portion narrow, strongly curved inwards and down, gap to vincular process broad; vinculum broad, posterior margin with broad, shallow sub-triangular emargination, lateral process short, hump-shaped; saccus sub-triangular, apex rounded, not extended beyond top of pedunculus; phallus narrow, straight, with needle-shaped down-curved apical hook, group of short teeth before apex, caecum inflated, about 1.5 times shorter than phallus.

Variation. Distal portion of valva varies of even width or with broadened apex; saccus varies in width and length.

Female genitalia (Fig. 41). Papilla analis elongate, sub-triangular, densely covered with short setae; apophysis posterioris 2-2.5 times longer than segment VIII; segment VIII sub-rectangular; subgenital plates medially strongly edged, separated with broad sub-triangular membranous area covered with fine microtrichia, posterolateral sclerites large, inverted drop-shaped, narrowly projecting anteromedially, placed under mid length of posterior margin of sternum VIII; anterior margin of sternum VIII deeply concave, strongly sclerotized, medial opening small; apophysis anterioris about as long as segment VIII, strongly widened in basal 2/3, distal portion narrow, weakly curved; colliculum narrow, twice longer than broad; ductus bursae narrow, weakly broadened in anterior and posterior portion; corpus bursae sub-ovate, twice longer than broad, about as long as ductus bursae, signum near entrance of corpus bursae, base small, distal hook gradually curved, of even width except for narrowed and pointed apex, posterior margin weakly serrated.

Diagnosis.

The new species is recognizable by the blackish-brown forewing with distinct narrow white subapical fascia. Gnorimoschema streliciella is nearly indistinguishable except for the less extensive brown pattern and the white sub-apical fascia which is usually angled towards apex. The male genitalia are characterized by the down-curved apical portion of the sacculus in combination with the moderately narrow medial emargination of the posterior margin of the vinculum. Gnorimoschema streliciella differs in the broader medial emargination of the posterior margin of vinculum, and the sacculus which is broader on base, and narrower and longer in the distal portion. The large, inverted drop-shaped posterolateral sclerites in combination with the strongly concave anterior margin of sternum VIII and the apophysis anterioris distinctly widened in basal 2/3 length are characteristic for the female genitalia. Gnorimoschema hoefneri differs in the weakly sclerotized anterior margin of sternum VIII, the narrower apophysis anterioris and the shorter signum.

Molecular data.

BINBOLD:ADE8232 (n=2), shared with G. brachyptera . The mean intraspecific divergence of the barcode region is 0.15%. The distance to the nearest neighbour G. brachyptera is 1.44% (p-dist).

Distribution.

Russia (Altai, Buryatia).

Biology.

Host plant unknown. Adults were collected in semi-arid, steppe habitats with scattered vegetation (Fig. 45) from mid-June to early August up to an elevation of 2500 m.

Etymology.

The new species is named in honour of Prof. Roman Yakovlev (Altai State University, Barnaul, Russia) in recognition of his enormous contribution to the exploration of Lepidoptera in Altai and organization of joint expeditions.