Sphenoraia (Sphenoraioides) yajiangensis Jiang, 1992

Feng, Chuan, Yang, Xing-Ke, Li, Zhi-Qiang & Liu, Yang, 2022, Revision of Sphenoraia Clark, 1865 (Coleoptera, Chrysomelidae, Galerucinae) from China, with descriptions of two new species, ZooKeys 1132, pp. 51-83 : 51

Sphenoraia (Sphenoraioides) yajiangensis Jiang, 1992

Fig. 10A-F

Sphenoraia yajiangensis Jiang, 1992: 667.

Sphenoraia (Sphenoraioides) yajiangensis : Wang et al. 2000: 118.

Type specimens examined.

Holotype: ♂, China, SiChuan Province, YaJiang ; 3600 m; 26 Aug. 1982; Shuyong Wang leg.; IZAS. Paratypes : 3♂♂ 1♀, same information as holotype. Allotype: 1♀, same information as holotype.

Description.

Male. Length 5.8-6.2 mm, width 3.6-4.0 mm.

Head, antennae, and legs brown, pronotum, scutellum and elytra blackish green, ventral surface of body black, elytral epipleuron from base to apical 1/3 and apex of each abdominal segment yellow.

Vertex finely and sparsely covered with punctures; frontal tubercles distinctly raised, separated from each other by a deep furrow; antennae short, robust, extended to the middle of elytra; antennomeres 1-3 thin, shiny; antennomeres 4-11 wide and flat, with short hairs, antennomere 4 approximately twice as long as wide; antennomeres 5-10, each approximately 1.5 × as long as wide; antennomere 2 shortest, antennomere 3 slightly longer than 2, 1.2 × as long as second; antennomere 4 longest, 1.7 × as long as antennomeres 2 and 3 combined; antennomeres 5-10 gradually shortened, shorter than 4; antennomere 11 slightly longer than 10, pointed.

Pronotum approximately twice as wide as long, with rounded lateral margins, disc slightly convex, sparsely covered in middle with small punctures with large punctures on other parts. The interstices between punctures equal to the diameter of individual punctures and lightly covered with small punctures in interstices.

Scutellum triangular, with rounded apex, covered with small punctures at base.

Bases of both elytra wider than pronotum, gradually widen posteriorly and rounded at apex; dorsal surface slightly convex, irregularly covered with large and deep punctures, the interstices between punctures equal to the diameter of individual punctures and lightly covered with small punctures in interstices.

Metasternum twice as long as mesosternum; prothoracic legs shortest, mesothoracic legs slightly longer, metathoracic legs longest.

Ventral surface of abdomen with five segments, segment 1 longest, segments 2-4 gradually shortened, apical segment slightly longer than segment 4, three lobes.

Aedeagus slender, parallel-sided, basally widened, apex narrowly pointed; in lateral view moderately bent.

Female. Length 5.8-6.3 mm, width 3.5-3.9 mm.

Antennal antennomeres 4-11 thin, antennomere 2 shortest, antennomere 3 slightly longer than 2, 1.5 × as long as second; antennomere 4 longest, 1.2 × as long as antennomeres 2 and 3 combined; apical sternite flatted.

Differential diagnosis.

This species can be distinguished from other species by blackish green pronotum and elytra.

Distribution.

China: Sichuan.

Host plant.

Berberidaceae .

Figures

Figure 10. Sphenoraia (Sphenoraioides) yajiangensis A-C habitus D-F aedeagus A, D dorsal views B, E ventral views C, F lateral views. Scale bars: 1 mm (A-C); 0.5 mm (D-F).