Phaedon alpinus Ge & Wang, 2002

Ge, Si-Qin, Daccordi, Mauro, Ren, Jing & Yang, Xing-Ke, 2015, Revision of Phaedon Latreille from China (Coleoptera: Chrysomelidae), Zoological Systematics 40 (1), pp. 1-30 : 4-5

Phaedon alpinus Ge & Wang, 2002 ( Figs 2–3 )

Phaedon alpinus Ge & Wang, 2002: 321 .

Description. Body length 3.5 mm, width 2.6 mm. Body elongate, rather convex, hind wings absent. Colour darkbrown with metallic reddish-purple; underside, legs, antennae, maxillary palpi black; two basal segments of antennae more or less reddish-brown.

Head. Frons and vertex with coarse and sparse punctures ( Fig. 2B ). Antennae slender, extending beyond to humeri, shown as Figs 3A, 3B .

Thorax and abdomen. Pronotum length 0.1 mm, width 1.6 mm; straight basely, rounded outward; base margined; disc with coarse, dense punctures. Scutellum triangular, apex slightly rounded; smooth and impunctate. Elytra length 2.6mm; slightly broader than pronotum at base, humeri not convex; punctures striae arranged in pairs, especially 6, 7 and 8, 9 striae; 6, 7 and 8, 9 joined together at base; 9 situated much nearer to lateral margin than 8, much sparse; interspace flat, impunctate, with longitudinal lines and transversal rugosity. Underside. Prosternal process narrow, apex slightly widen; hypomeron, mesoventrite, metaventrite and abdomen with dense and coarse punctures; antero-lateral plate of metaventrite small, impunctate. Aedeagus. Shown as Figs 3C, 3D .

Spermatheca. Shown as Fig. 3F .

Material examined. Holotype male, Sichuan, Dege Queershan, West slope (elev. 4 250m), 7 July 1983, coll. Shu-Yong Wang (IZCAS). Paratypes: 1 female, Sichuan, Dege Queershan (elev. 4 600 m), 7 July 1983, coll. Xue-Zhong Zhang ( IZCAS) ; 1 male, 1 female, Queershan Yakou (elev. 4 250 m), 7 July 1983, coll. Shu-Yong Wang ( IZCAS) ; 1 male, West slope (elev. 4 250 m), 7 July 1983, coll. Shu-Yong Wang ( IZCAS) ; 1 male, Dege Keluodong (elev. 3 600 m), 25 July 1983, coll. Xue-Zhong Zhang ( IZCAS) ; 5 males and 1 female, Garze (elev. 4 000–4 300 m), 9–10 July 1983, coll. Shu-Yong Wang, Chun-Lai Niu ( IZCAS) ; 1 female, Sichuan, Dege Queershan, East slope (elev. 4 700 m), 7 July 1983, coll. ShuYong Wang ( IZCAS) . Other materials: 1 female, China, W. Sichuan, road Qianning Dawu pass 35 km NNW. Qianning (elev. 3 951 m), 1 August 1994, coll. J. Tuma. alpine and forest region ( MDC) ; 1 male and 2 females, China, N. Yunnan, Dali Bai Nat. Aut. Prof. 4 km E Dali old town, shore terrain of Er Hai Lake (25°42 ʹ N, 100°01 ʹ 5 ʺ E; elev. 2 020 m), 27 July –

© Zoological Systematics, 40(1): 1–30

21 October 2003, coll. David W. Wrase, young willows with Kontgrass, under vegetation / in roots ( HKC); 1 female, China, W. Sichuan, Ganzi, Tibet Aut. Pref. Yajiang Co., Shalui Shan 20 km W. Yaijiang, brook cleft alp. meadow (30°01 ʹ N, 100°41 ʹ E; elev. 4 250 m) , 2 August 1999, coll. D. W. Wrase ( HKC); 1 female, China, E. Qinghai, Huashixia (elev. 4 200 m) , 27 June 1992 ( MDC) .

Remarks. The species is distinguished from P. apterus Wang by interspace of elytra striae smooth and impunctate, with transveral rugosity; epipleura smooth and impunctate.

Distribution. China (Sichuan, Yunnan).

Figures

Fig. 2. Phaedon alpinus Ge & Wang, 2002, SEM. A. Habitus, ventral view. B. Head, frontal view. C. Onychium, lateral view, Odontedon fulvescens. D. Onychium, lateral view, Phaedon alpinus. E. Head, ventral view. Scale bars: A=1.0mm; B, D=0.2mm; C, E=0.1mm.

Fig. 3. Phaedon alpinus Ge & Wang, 2002. A. Antenna, male. B. Antenna, female. C. Aedeagus, dorsal view. D. Aedeagus, lateral view. E. Tegman. F. Spermatheca. Scale bars:A–B=0.5mm; C–E=0.2mm; F =0.1mm.