Aplosonyx nigriceps Yang, 1995

Feng, Chuan, Yang, Xing-Ke, Liu, Yang & Li, Zhi-Qiang, 2023, Revision of Aplosonyx Chevrolat, 1836 (Coleoptera, Chrysomelidae, Galerucinae) from China, with descriptions of three new species, ZooKeys 1154, pp. 159-222 : 159

Aplosonyx nigriceps Yang, 1995

Figs 11C , 13A-F

Aplosonyx nigriceps Yang, 1995: 91.

Type specimens examined.

Holotype: ♂, China, Hubei Province, Lichuan ; 1300 m a. s. l.; 23 Jul. 1989; Shuyong Wang leg.; IZAS .

Allotype: ♀, China, Hubei Province, Lichuan, Xingdou Mt ; 810 m a. s. l.; 22 Jul. 1989; Shuyong Wang leg.; IZAS.

Paratype: 1♂ 1♀, China, Hubei Province, Lichuan ; 1300 m a. s. l.; 23 Jul. 1989; Shuyong Wang leg.; IZAS . ♂, China, Hubei Province, Lichuan, Xingdou Mt ; 1100 m a. s. l.; 22 Jul. 1989; Shuyong Wang leg.; IZAS . 2♀♀, China, Hubei Province, Lichuan, Xingdou Mt ; 1100 m a. s. l.; 22 Jul. 1989; Shuyong Wang leg.; IZAS . ♂, China, Hubei Province, Hefeng , shayuan; 1300 m a. s. l.; 1 Aug. 1989; Shuyong Wang leg.; IZAS . ♀, China, Hubei Province, Badong ; 1700 m a. s. l.; 21 May 1989; Wenzhen Ma leg.; IZAS .

Diagnosis.

This species can be distinguished from other species by its black pronotum, and each elytron with five black spots: one at the base near the scutellum, a pair in the middle, and apically two spots which are connected. This species differs from A. omeiensis in having a black head and pronotum, the abdomen yellowish brown, and the shape of the spots on the elytra.

Redescription.

Male. Length 4.5-5.0 mm, width 2.7-3.2 mm.

Head, pronotum and scutellum black, antennae, ventral surface of the thorax and legs brown, abdomen yellowish brown, elytra yellow, each elytron with five black spots, one at base near scutellum, a pair in the middle, and a pair of apical spots which are connected.

Vertex finely and sparsely covered with punctures. Interocular space 2.1 × as wide as transverse diameter of eye. Interantennal space 1.5 × as wide as transverse diameter of antennal socket. Frontal tubercles transverse, each separated by a deep furrow; antennae slender, 0.75 × as long as body; antennomeres 1-3 shiny; antennomeres 4-11 covered with pubescence, antennomeres 2 and 3 shortest, antennomere 3 nearly equal in length and shape to antennomere 2, antennomere 4 longest, approximately 1.5 × as long as antennomeres 2 and 3 combined; antennomeres 5-10 gradually shortened, shorter than antennomere 4; antennomere 11 slightly longer than 10, pointed.

Pronotum 1.9 × as wide as long, lateral border margined, widest at anterior 1/3; disc with deep transverse furrow, less distinct in middle; closely covered with large punctures in furrow and with sparsely small punctures in other parts of pronotum.

Scutellum triangular, finely covered with punctures.

Elytra: wider than pronotum, 0.7 × as long as body, 1.5 × as long as wide, epipleura wide at anterior 1/3, posteriorly gradually narrowing towards apex, dorsal surface slightly convex, regularly covered with large and deep punctures, partially arranged in ten rows in each elytron, the interstices between punctures wider than diameter of individual punctures, approximately 2.5 × as wide as the diameter of individual punctures and lightly covered with small punctures in interstices.

Metasternum 2 × as long as mesosternum. Ventral surface of abdomen with five ventrites, ventrite 1 longest, ventrites 2-4 gradually shortened, apical ventrite slightly longer than ventrite 3, with two subtriangular incisions.

Aedeagus slender, parallel-sided, basally widened, apically pointed, in lateral view moderately bent.

Female. Length 4.6-5.0 mm, width 2.8-3.2 mm.

Antennae slightly thinner than in male, without short hairs, antennomere 4 longest, approximately 1.2 × as long as antennomeres 2 and 3 combined; apical sternite without incisions.

Distribution.

China: Hubei, Sichuan.

Figures

Figure 11. Aedeagus in dorsal view A A. fulvescens B A. gancuicus C A. nigriceps D A. omeiensis E A. orientalis F A. ornatus. Scale bars: 0.5 mm (A-E).

Figure 13. Aplosonyx nigriceps A-C habitus of holotype, IZAS D-F aedeagus A, D dorsal views B, E ventral views C, F lateral views. Scale bars 0.5 mm (D-F); 1 mm (A-C).