Stenochinus xinyicus, Yuan, Cai-Xia & Ren, Guo-Dong, 2014

Yuan, Cai-Xia & Ren, Guo-Dong, 2014, Two new species of the Stenochinus amplus species-group from China (Coleoptera, Tenebrionidae, Stenochiini), ZooKeys 416, pp. 67-76 : 71-73

Taxon classification Animalia Coleoptera Tenebrionidae

Stenochinus xinyicus sp. n. Figs 2-3, 5, 8-9, 13-14, 18-19

Type material.

Holotype: ♂, China, Guangdong, Xinyi City, Dawuling, 1.vi.2002, Cheng Chen leg. (MHBU). Paratypes: 3 ♀♀, same locality as holotype, 31.v.2002, Zhong-Ping Deng leg.; 1.vi.2002, Cui-Feng Li leg.; 6.vii.1988, Feng-Long Jia leg. (MHBU); 2 ♀♀, same locality as holotype, 31.v.2002, Bing-Lan Zhang leg.; 7.vii.1988, He-Xiang Zhou leg. (SYSU).

Diagnosis.

This new species is similar to Stenochinus cylindricus , but can be distinguished from the latter by antennomeres VII–XI wider than long, pronotum moderately projecting anteriorly (Fig. 5), shape of male genitalia different (Figs 13-16) (in Stenochinus cylindricus , antennomeres VIII–XI wider than long (Fig. 10), pronotum strongly projecting anteriorly (Fig. 6)).

Etymology.

The specific name is derived from the type locality of this species.

Description.

Male (Fig. 18). Body length 11.0 mm, elongate, subcylindrical. Head, elytra, legs reddish brown, pronotum brown, antennae and mouthparts yellowish brown; scale-like hairs surface pale golden. Head transversely subelliptical, surface densely punctate; clypeus transverse, weakly convex in middle, clypeogenal suture grooved, frontoclypeal suture invisible; genae weakly raised; frons wide, distance between eyes 2.53 times as wide as the transverse diameter of an eye in dorsal view. Eyes medium-sized, weakly protruding, with groove along inner and posterior margins. Antennae (Fig. 8) clavate, antennomeres VII–XI wider than long, antennomeres XI oval, length ratio of antennomeres II–XI as 0.16: 0.17: 0.12: 0.10: 0.09: 0.09: 0.10: 0.13: 0.10: 0.23. Maxillary palpomere IV moderately expanded. Pronotum (Fig. 2) 1.14 times as long as wide, widest shortly before middle; anterior margin weakly reflexed; posterior margin weakly bisinuate, with deep emargination in middle; both sides steeply inclined downward, lateral margins sinuate before posterior angles; anterior angles acute and directed anteriorly, posterior angles obtuse and directed posteri orly; disc subelliptically projected in anterior parts, projecting area weakly impressed, surface roughly and deeply punctuate, punctures often fused with another. Scutellum subquadrate, glabrous. Elytra 2.51 times as long as wide, widest at apical 1/3, 2.80 times as long as and 1.11 times as wide as pronotum; dorsum convex but flattened in lateral view; disc with rows of large, deep and subquadrate punctures, each puncture with a granule on each lateral margin; intervals somewhat transversely wrinkled, scale-like hairs shorter and narrower than those on pronotum. Ventral side covered with dense punctures and scale-like hairs, which shorter than those on pronotum. Legs relatively short, length ratio of metatarsomeres I–IV as 0.40: 0.33: 0.21: 0.67. Male genitalia (Figs 13-14) strongly curved in middle in lateral view, 2.29 mm long, 0.43 mm wide; apicale 0.77 mm long, weakly curved in lateral view.

Female (Fig. 19): Body 11.0-12.5 mm, dark brown. Antennae (Fig. 9) thicker, length ratio of antennomeres II–XI as 0.12: 0.14: 0.11: 0.10: 0.07: 0.08: 0.09: 0.12: 0.11: 0.26. Pronotum (Fig. 3) 1.10 times as long as wide. Elytra 2.42 times as long as wide.