Aplosonyx omeiensis 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 omeiensis Chen, 1942

Figs 11D , 14A-F

Aplosonyx pictus omeiensis Chen, 1942: 40.

Aplosonyx omeiensis : Zhang et al. 2008: 65. Raised from Aplosonyx pictus omeiensis Chen.

Type specimens examined.

Paratypes: 2♂♂ 3♀♀, China, Sichuan Province, Mount Emei , Sep. 1912; IZAS .

Additional specimens examined.

♂, China, Sichuan Province, Mount Emei, Jiulaodong ; 1800 m a. s. l.; 7 Jul. 1957; Fuxing Zhu leg.; IZAS . ♂, China, Sichuan Province, Mount Emei, Jiulaodong ; 1800 m a. s. l.; 16 Jun. 1957; Youcai Yu leg.; IZAS . ♂, China, Sichuan Province, Mount Emei, Jiulaodong ; 1800 m a. s. l.; 7 Jul. 1957; Zongyuan Wang leg.; IZAS; IOZ(E)1566650 . ♂, China, Sichuan Province, Mount Emei , 17 Jun. 1955; Keren Huang leg.; IZAS; IOZ(E)1566630 . ♀, China, Sichuan Province, Mount Emei , 17 Jun. 1955; Keren Huang leg.; IZAS; IOZ(E)1566632 . ♀, China, Sichuan Province, Mount Emei , 17 Jun. 1955; Keren Huang leg.; IZAS; IOZ(E)1566639 . ♂, China, Sichuan Province, Mount Emei , 17 Jun. 1955; Keren Huang leg.; IZAS; IOZ(E)1566647 . ♂, China, Sichuan Province, Mount Emei , 1800 m a. s. l.; 24 Jun. 1955; Bingrong Ou leg.; IZAS; IOZ(E)1566634 . ♂, China, Sichuan Province, Mount Emei , 1800 m a. s. l.; 23 Jun. 1955; Bingrong Ou leg.; IZAS; IOZ(E)1566635 . ♂, China, Sichuan Province, Mount Emei , 2100 m a. s. l.; 24 Jun. 1955; Bingrong Ou leg.; IZAS; IOZ(E)1566636 .

Diagnosis.

This species can be distinguished from other species by the pronotum with a black spot, each elytron with five black spots, the middle and apex with one pair of spots, and one spot at the base. This species differs from A. nigriceps in having a black abdomen with pale margins.

Redescription.

Male. Length 4.6-4.8 mm, width 2.6-2.8 mm.

Head, antennae, pronotum, elytra and leg yellow, vertex, scutellum and ventral surface of the body black, abdomen with pale margins, pronotum with a black spot in middle, each elytron with five black spots, middle and apex with one pair of spots, and base with one spot.

Vertex finely and sparsely covered with punctures. Interocular space 2 × 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, 0.7 × as long as body; antennomeres 1-3 shiny; antennomeres 4-11 covered with pubescence, antennomere 2 shortest, antennomere 3 twice as long as second; antennomere 4 longest, approximately 1.2 × as long as antennomeres 2 and 3 combined; antennomeres 5-10 gradually shortened, shorter than antennomere 4; antennomere 11 slightly longer than antennomere 10, pointed.

Pronotum 1.8 × as wide as long, lateral border margined, widest at anterior 1/3; disc with deep transverse furrow, covered with several 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, 1.6 × as long as wide, epipleura wide at anterior 1/3, posteriorly gradually narrowing towards apex; dorsal surface slightly convex, covered with punctures in irregular rows, the interstices 2 × as wide as diameter of punctures and slightly covered with fine punctuation.

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, slightly narrowed in middle, basally widened, apex pointed, in lateral view slightly bent.

Female. Length 4.4-4.8 mm, width 2.6-3.0 mm.

Antennae slightly thinner than in male, antennomere 2 shortest, antennomere 3 approximately 1.5 × as long as second; antennomere 4 longest, 1.5 × as long as antennomeres 2 and 3 combined; apical sternite without incisions.

Distribution.

China: 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 14. Aplosonyx omeiensis A-C habitus of paratype, 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).