Gnorimoschema fuscescens Li & Bidzilya 2017, sp. nov.
Creators: name: Li, Houhun
name: Bidzilya, Oleksiy V.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Gelechiidae
Gnorimoschema
Gnorimoschema fuscescens

description: Gnorimoschema fuscescens sp. nov.
Figs 11–13, 35–37, 57
Gnorimoschema nordlandicolella (Strand, 1902). Huemer 1996: 84, fig. 15. Misidentification.
Gnorimoschema mongolorum Povolný, 1969: 4 (part), Pl. 2, fig. 4; Pl. 4, fig. 9; Povolný 2002: Pl. 2, fig. 11. Misidentification.
Type material. Holotype ♂, CHINA: Hezuo, Gannan, Gansu, 16.viii. 2007, 2251 m (Feng Yang & Hanguang Gao) (gen. slide no. 139/14, O. Bidzilya) (NKU). Paratypes: 1 ♂, 1 ♀, same data as holotype (gen. slide nos. L13043 ♂; L13047 ♀); 4 ♂, Temurtei, Chahar Right Back Banner, Inner Mongolia, 1410 m, 4.viii.2002 (Dandan Zhang & Zhiqiang Li) (gen. slide no. 261/08, L06008, L06007); 1 ♀, 27.viii.1994 (gen. slide no. L06009); 1 ♂, 1 ♀, Halawubeigou, Mt. Helan, Alxa Left Banner, Inner Mongolia, 2200 m, 9.viii.2011 (Lixia Li & Yinghui Mu) (all kept in NKU). RUSSIA: 3 ♂, Chitinskaya obl., 23 km N of Kyra, 5,9,10. viii.1994 (Ustjuzhanin) (gen. slide nos. 268/08; 148/14, O. Bidzilya); 1 ♂, SE Zabaikalie, Borzja 30.vi.1998 (Golovushkin); 1 ♂, SE Zabaikalie, vic. of Nizhniy Tsasutchei vil., sosnovyi bor, 13.viii.1990, at light (Kostjuk); 8 ♂, Russia, Altai, Ongudaiskiy distr., 15 km down of vil. Iodro along Chuja river, 6,7. viii.2000 (Bidzilya); 2 ♂, Russia, Altai, Ongudaiskiy distr., Malyi Jaloman 700 m, at light, 2.viii.2001 (Bidzilya) (gen. slide no. 81/15, O. Bidzilya); 6 ♂, 1 ♀, Russia, Altai, Kosh- Agatch distr., 15 km upper vil. Beltir along Chagan river, 2200 m, 13,14,16. viii.2000 (Bidzilya) (gen. slide nos. 153/ 14♂; 82/ 15♀, O. Bidzilya); 3 ♂, 2 ♀, Russia, Altai, 15 km S of Kosh-Agatch, Dzhalgyztobe Mt., 1800 m, 10, 8.viii.2000 (Bidzilya) (gen. slide no. 87/ 15♀, O. Bidzilya); 4 ♂, same data but 29,30. vii.2001; 1 ♂, Russia, Altai, Kosh-Agatch distr., 15 km E Dzhazator, 1500 m, 24.viii.2000 (Bidzilya); 2 ♂, Russia, Altai, Kosh-Agatch distr., 30 km W Dzhazator, Koksu river, 1600 m, 21.viii.2000 (Bidzilya) (all kept in ZMKU).
Diagnosis. The new species is recognizable by the rather uniformly coloured greyish- black to light-brown forewing with poorly developed black markings. The sacculus broad at base with the strongly inwardly curved distal portion in combination with the broad, truncate saccus are characteristic for the male genitalia. The female genitalia are defined by the narrow subtriangular posteriolateral sclerites that reach the posterior margin of sternum VIII.
Description. Adult (Figs 11–13). Wingspan 12.4–15.5 mm. Head grey to light black, frons light grey, labial palpus upcurved, light grey densely motlled with brown-tipped scales, inner and upper surface of segment 2 white, underside with distinct ridge, segment 3 brown with white middle belt and white apex; scape black, other antennal segments brown with white rings at base; thorax and tegulae grey to brown; forewing narrow, light grey, distinctly irrorated with brown and reddish brown particularly along veins, costal margin mottled with black, dorsal margin usually light, greyish to off-white, three diffuse reddish spots in cell, cilia white, brown-tipped; hindwing light grey.
Variation. The species varies from nearly uniformly light brown to mostly black with reddish veins.
Male genitalia (Figs 35–37). Uncus subtriangular, apex pointed; gnathos weakly curved, of moderate width, slightly narrowed in middle; tegumen broad and long, anteromedial emargination deep, triangular; valva broad at base, curved in 1/3, middle portion very narrow, apex distinctly inflated, subtriangular; sacculus broad at base, distal portion narrow, strongly inwardly curved, gap to vincular process comparatively broad; vinculum broad, posterior margin with broad shallow medial emargination, vincular process short, hump-like; saccus subtriangular, top abruptly truncated, not extended beyond top of pedunculus; phallus of moderate width, with several small teeth on one side, apex weakly pointed with small downcurved arm, caecum inflated, about 1.5 times shorter than phallus.
Variation. Saccus slightly varies in width.
Female genitalia (Fig. 57). Papillae anales elongate, subtriangular, densely covered with short setae; apophysis posteriores three times longer than segment VIII; segment VIII subrectangular, slightly broader than long; subgenital plates separated with moderately broad to narrow membranous area covered with fine microtrichia, medially with elongate folds, posteriolateral sclerites subtriangular, lateral corner rounded, anterior corner prolonged to 2/3 length of sternite VIII or nearly to the base of apophysis anteriores, anterior margin of sternite VIII strongly sclerotized, concave, with paired madial projections; apophysis anteriores longer than segment VIII, distinctly broadened in basal half; colliculum cylindrical with lateral sclerotization; ductus bursae inflated after colliculum, ductus long and narrow; corpus bursae as long as ductus bursae, elongate, about of equal width, signum the entrance of corpus bursae, stout, distal hook long, moderately narrow, strongly curved at 1/3.
Variation. Base of signum and distal hook vary in length.
Remarks. The male genitalia of the new species resemble those of G. epithymellum but the valva is narower at base and more weakly curved, the distal part of the sacculus is shorter and more weakly curved, the saccus is more strongly tapered and the phallus is longer and narrower (see Huemer & Karsholt 2010, fig. 7). G. steueri Povolný, 1975 is somewhat similar in the shape of sacculus, but differs in the broader saccus, shorter phallus, as well as broader tegumen and uncus (see Huemer & Karsholt 2010, fig. 6). The sacculus of G. cinctipunctella is narrower at base and its distal portion is longer. The female genitalia most resemble those of G. nordlandicolella but the posteriolateral sclerites of the latter species are not reaching the posterior margin of sternite VIII and are usually narrower. G. cinctipunctella has broader and shorter posteriolateral sclerites and longer segment VIII.
Specimens from Mongolia (Povolný 1969, 2002) and Kyrgyzstan (Huemer 1996) which were treated as G. streliciellum mongolrum and G. nordlandicolella respectively actually represent G. fuscescens sp. nov.
Biology. Host plant unknown. Adult were collected in the steppe biotopes from late June to late August up to an elevation of 2250 m.
Distribution. China (Gansu, Inner Mongolia), Kyrgyzstan, Mongolia, Russia.
Etymology. The specific epithet is derived from the Latin fuscescens, meaning brownish, and refers to the dominant colour of the forewing.
description: Published as part of Li, Houhun & Bidzilya, Oleksiy V., 2017, Review of the genus Gnorimoschema Busck, 1900 (Lepidoptera, Gelechiidae) in China, pp. 173-195 in Zootaxa 4365 (2) on pages 178-180, DOI: 10.11646/zootaxa.4365.2.4, http://zenodo.org/record/1117538