Aplosonyx gancuicus (Chen, 1942)

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 gancuicus (Chen, 1942)

Figs 11B , 12A-F

Galerucida [sic!] Galerucida gancuica Chen, 1942: 38.

Gallerucida gancuica : Gressitt and Kimoto 1963: 724.

Aplosonyx gancuica : Xu, Nie and Yang 2022: 52.

Type specimen examined.

Holotype: ♂, China, Gansu Province; 8 May 1919; IZAS. IOZ(E)215680.

Diagnosis.

This species can be distinguished from other species by the elytra with a broad black band at the side, which extends along the lateral margin of each elytron, and three black spots on each side of the suture.

Redescription.

Male. Length 6.1 mm, width 3.6 mm.

Head, antennae, pronotum, scutellum, legs, and ventral surface of body black, elytra yellow, each elytron with a broad black band and three black spots.

Vertex sparsely covered with punctures. Interocular space 2 × as wide as transverse diameter of eye. Interantennal space 1.8 × as wide as transverse diameter of antennal socket. Frontal tubercles transverse and raised, each separated by a deep furrow; antennae slender, antennomeres 1-3 shiny; antennomeres 4-8 covered with pubescence, antennomere 2 shortest, antennomere 3 approximately 1.5 × as long as second; antennomere 4 longest, approximately 1.5 × as long as antennomeres 2 and 3 combined; antennomeres 5-8 gradually shortened, shorter than antennomere 4.

Pronotum 1.8 × as wide as long, lateral border margined, widest at posterior corners, disc with sparse punctures.

Scutellum triangular, finely covered with punctures.

Elytra: wider than pronotum, 0.7 × as long as body, 1.6 × as long as wide, epipleura moderately wide at anterior 1/3, posteriorly gradually narrowing towards apex, dorsal surface slightly convex, covered with large deep punctures, partially arranged in ten rows in each elytron, the interstices between punctures wider than diameter of individual punctures, approximately 2 × 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, apically pointed, in lateral view moderately wavy in apex.

Distribution.

China: Gansu.

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 12. Aplosonyx gansuica A-C habitus of holotype, IZAS IOZ (E) 215680 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).