Phaedon brassicae Baly, 1874

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 : 11-12

Phaedon brassicae Baly, 1874 ( Fig.7 )

Phaedon brassicae Baly, 1874: 174 .

Phaedon incertum Baly, 1874: 175 .

Phaedon baolacensis Achard, 1926: 139 .

Description. Body length 3.4–3.9 mm, width 2.2–2.5 mm. Body elongate, rather convex, hind wings present. Colour. Dorsum metallic blue, purple or black, sometimes dark aerugo; underside of body, legs black or dark blue, last segment of abdomen yellowish brown; antennae black, basal two segments of antennae reddish brown.

Head. Frons and vertex with very coarse and dense punctures. Antennae shown as Figs 7A, 7B .

Thorax and abdomen. Pronotum length 0.65 mm, width 1.75 mm; disc with dense and coarse punctures, with one longitudinal impunctate stripe in medal line. Scutellum subtriangular, impunctate. Elytra length 3.0 mm; elytra striae regular, ninth stria closed to lateral margin, tenth situated lateral margin, shagreened; interspace with very fine and sparse punctures, sometimes impunctate; epipleuron with dense punctures. Underside. Prosternal process narrow, slightly widened apically. Hypomeron, mesoventriate, metaventrate and abdomen with dense and coarse punctures. Antero-lateral plate of metaventrite large and impunctate.

Aedeagus. Shown as Figs 7C, 7D .

Spermatheca. Shown as Fig. 7E .

Material examined. Holotype, male, China, coll. Baly (BMNH). Other materials: 1 male, Yunnan, Jingjiang , 31 March 1919, coll. unknown ( IZCAS) ; 1 male and 3 females, Zhejiang, Mt. Tianmu , 21 September 1953, coll. unknown ( IZCAS) ; 1 female, Zhejiang, Zhoushan, Dinghai , 24 April 1991, coll. unknown ( IZCAS) ; 2 males, Zhejiang, Qingyuan, Baishanzu (elev. 1 300 m), 19 April 1994, coll. Hong Wu ( IZCAS) ; 1 female, Fujian, Longqishan , 21 May 1991, coll. Hong Liu ( IZCAS) ; 1 male, Fujian, Jianyang, Huangkeng (elev. 270 m), 11 April 1960, coll. Yi-Ran Zhang ( IZCAS) ; 1 female, Guangxi, Guilin , 12 October 1932, coll. unknown ( IZCAS) ; 1 female, Guangxi, Longzhou (elev. 800m), 26 March 1998, coll. Chun-Sheng Wu ( IZCAS) ; 1 male, 1 female, Guangxi, Daxin (elev. 280 m), 30 March 1998, coll. Chun-Sheng Wu ( IZCAS) ; 1 male, Guangxi, Jingxi (elev. 840 m), 1 April 1998, coll. unknown ( IZCAS) ; 1 female, Yunnan, Wenquan , 26 April 1982, coll. Chun-Mei Huang ( IZCAS) ; 2 males, 3 females, China, W. Henan, Quanbaoshan, Xiangershan (39°07'N, 111°25'E; elev. 1 600–2 000 m), 23–24 May 2010, coll. Jaroslov Turna ( MDC) ; 1 male, 1 female, China, Shaanxi, bank tributary of Wei He riv., 7 km E Zhouzhi auto-route km 100 (106.17°E, 34.09°N; elev. 400m), 24 August 1975, coll. Wrase ( MDC) ; 1 male and 2 females, China, Yunnan, Dali Bai Nat. Aut. Pref. 4 km E Dali old town, shore terrain of Er Hai Lake, Young willows with knotgrass under vegetation in roots (25°42'N, 100°01'5"E; elev. 2 020 m), 27 August–21 October 2003, coll. Wrase ( MDC) .

Remarks. The species is similar to Phaedon alticola Chen , but it can be distinguished by the following characters: dorsum with same colour; head with dense punctures; interspace of elytra with very fine and sparse punctures, sometimes impunctate. The ninth stria of elytra is closed to lateral margin.

Distribution. China (Anhui, Jiangsu, Zhejiang, Hubei, Hunan, Fujian, Taiwan, Guangxi, Sichuan, Guizhou, Yunnan), Japan, Vietnam.

Host plant. Brassica sp. , Pekinensis sp., Rupr sp. or Ruppia , Raphanus sp. , Capsella sp. , Allium sp. , Beta sp. , Lactuca sp.

© Zoological Systematics, 40(1): 1–30

© Zoological Systematics, 40(1): 1–30

Figures

Fig. 7. Phaedon brassicae Baly, 1874. A. Antenna, male. B. Antenna, female. C. Aedeagus, dorsal view. D. Aedeagus, lateral view. E. Spermatheca. Scale bars: A–B=0.5mm; C–D =0.2mm; E=0.1mm.