Osmylus shaanxiensis, Xu, Han, Wang, Yongjie & Liu, Zhiqi, 2016

Xu, Han, Wang, Yongjie & Liu, Zhiqi, 2016, Three new species of Osmylus Latreille from China (Neuroptera, Osmylidae), ZooKeys 589, pp. 107-121 : 114-116

Taxon classification Animalia Neuroptera Osmylidae

Osmylus shaanxiensis sp. n. Figs 6, 7

Material examined.

Holotype Male. CHINA: Shaanxi (Province): Houzhenzi (town), [33°51'N, 107°50'E] 12.viii.2007, leg. Yang Shi. Verbatim label data (translated from Chinese): CHINA: Shaanxi, Houzhenzi/ 12.viii.2007/ Yang Shi/ CAU. Condition: Antennal flagellum missing. Terminalia cleared in KOH, and stored in the micro-vial pinned below the specimen. Paratype. 1 female, same data as holotype (CAU). 1 female, CHINA: Gansu (Province): Diebu (county), Lazikou. 1700m, [34°03'N, 103°54'E] 12.viii.1980, Chikun Yang (CAU).

Diagnosis.

Wing broad, with numerous dark brown spots on the margin. Male: 9th tergite with a median narrowing, with a small tuberous dorsal process in lateral view; protuberance of posteroventral gonarcus papillary. Base of mediuncus knife-shaped in lateral view. Female: gonapophysis lateralis basally fused with a triangular sclerite, spermatheca bent, cylindrical.

Description.

Head. Vertex dark brown. Ocelli yellow, area comprised among ocelli dark brown, eye dark brown; frons brown. Thorax. Pronotum dark brown with yellow long setae; meso- and metanotum dark brown. Legs yellow with dark yellow setae, pretarsal claws dark brown.

Wings (Fig. 6). Forewing length 22-25 mm, width 8-9 mm. Membrane hyaline, with numerous dark brown spots on the margin; pterostigma and nygmata brown; veins dark brown, some edged with dark brown spots; Rs with 12-13 branches, gradates cross-veins with brown marks. Hindwing length 20-22 mm, width 7-8 mm. Membrane hyaline; pterostigma light brown.

Male Terminalia (Fig. 7 a–d). Scent glands stout; 9th tergite with a median narrowing in lateral view, with a small hemispheric dorsal process; ectoproct triangular in lateral view, callus cerci oval; gonarcus sclerotized distally and posteroventrally ending into a papilla in lateral view; anterior arm of gonarcus slender, basally dilated; mediuncus basally dilated, knife-shaped, more slender apically in lateral view; rod-shaped paramere slender and bent in lateral view, dilating from base to end.

Female Terminalia (Fig. 7 e–f). 8th sternite reduced; 9th tergite narrow; ectoproct approximately conical, callus cerci round; gonapophysis lateralis fusiform, apex with a long finger-like stylus; spermatheca cylindrical, bent and slightly dilated basally.

Distribution.

China (Shaanxi, Gansu).

Etymology.

The specific name ‘shaanxiensis’ refers to 'Shaanxi Province’, the type locality.

Remarks.

The new species can be distinguished from other species by the small hemispheric dorsal process of the 9th tergite in male (Fig. 7a). Although Osmylus shaanxiensis sp. n. is similar to Osmylus conanus , they can be easily separated by the differences of gonarcus and gonapophysis lateralis. The distal part of gonarcus in Osmylus conanus protrudes slightly but the same part in Osmylus shaanxiensis sp. n. protrudes significantly in lateral view (Fig. 7b). Also compared with Osmylus conanus , the spermatheca in Osmylus shaanxiensis sp. n. is longer and more bent (Fig. 7f).