Phaedon mellyi Achard, 1926

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 : 24-26

Phaedon mellyi Achard, 1926 ( Figs 18–19 )

Phaedon mellyi Achard, 1926: 137 .

Description. Body length 3.5 mm, width 2.2 mm. Body elongate, rather convex, hind wings present. Colour dorsum metallic blue; underside of body, legs dark blue, last segment of abdomen yellowish brown; antennae black, basal two segments of antennae reddish brown.

Head. Frons and vertex with coarse and dense punctures ( Fig. 18B ). Antenna shown as Fig. 19A .

Thorax and abdomen. Pronotum length 0.9 mm, width 1.9 mm; disc with dense and coarse punctures ( Fig. 18A ). Scutellum subtriangular, impunctate ( Fig. 18C ). Elytra length 2.9 mm; striae regular, interspace with fine and sparse punctures. 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 19B, 19C .

Spermatheca. Unknown.

Material examined. Holotype male, China, Hung-Kom. Melly / Chevrolat collection (teste Achard): "Chinense Chevr., Chine boréale, Hong-Kung, Melly" / Type / Phaedon mellyi n: sp. J. Achard det. (NMPC).

Remarks. The species is similar to Phaedon alticola (Chen) , but it can be distinguished by the frons with coarse and dense punctures.

Distribution. China ( HongKong).

© Zoological Systematics, 40(1): 1–30 Phaedon prosternalis Daccordi & Ge , sp. nov. ( Figs 20–21 )

Description. Body length 2.9–3.5 mm, width 1.9–2.5 mm. Body ellipsoid, rather convex, hind wings absent. Colour vandyke brown to natal brown; tarsi and tibiae mikado brown to tone down.

Head. Frons and clypeus with sparse punctures (1–3 times the diameter). Antenna shown as Figs 21A, 21B .

Thorax and abdomen. Pronotum length 0.7–0.8 mm, width 1.5–1.7 mm; central disc with very thin and sparse punctures, lateral sides with distincte separate punctures. Scutellum subtriangular, smooth and impunctate. Elytra length 2.2–2.4 mm; elytra glazed and dull in particular apically; elytra with single striae, interspace with very fine and sparse punctures. Epipleura glazed with very few punctures. Underside. Prosternal process wide, apex truncate; hypomeron, mesoventrite and metaventrite, abdomen with coarse and dense punctures, lateral sides of prosternum, mesoventrite, metaventrite and first segment of abdomen; antero-lateral plate of metaventrite small and impunctate ( Figs 20A, 20C, 20D ).

Aedeagus. Shown as Figs 21C, 21D .

Spermatheca. Shown as Fig. 21E .

Material examined. Holotype male, W. Sichuan ( Ganzi Tibet. Aut. Pref. Yajiang Co.), Shalui Shan, 20 km W. Yajiang, brook cleft, alp. Meadow (30°01'N, 100°41'E; elev. 4 250 m), 2 July 1999, coll. D. W. Wrase ( NMEG). Paratypes: 1 male, W. Sichuan, Yaan Pref., Shimiana Co. Xiaoxiang Ling Pass betw. Shimian – Garduo, 27 km SE. Shimian, springfed-swamp (29°02'75''N, 102°31'48''E; elev. 2 450 m), 8 July 1999, coll. A. Putz ( MDC); 1 female, W. Sichuan, Ganzi Tibet. Aut. Pref. Yajiang Shalui Shan Waldrest 32km WNW. Yajiang , Nadeistreu (30°08'N, 100°42'E; elev. 4 300 m), 4 July 1999 , coll. M.

© Zoological Systematics, 40(1): 1–30 Schulke (NMEG) ; 1 male, N. Sichuan, NNE. of Luoduo Village . (32°09'42''N, 103°23'03''E – 32°09' 42''N, 103°21'52''E; elev. 3 800 – 4 585 m), 18 August 2007, coll. Belousov & Kabak, with a Lopatin’s label “ Neophaedon ” ( ZIN) ; 1 female, W. Sichuan, road Qianning-Dawru pass, 35 km NNW. Qianning, Alpine and forest Region (elev. 3 951 m), 1 August 1994. coll. J. Turna. ( MDC) ; 1 male, N. Sichuan, W. Song-Pinggou (elev. 3 890 m), 17 August 2007, coll. Kabak. ( ZIN) .

Etymology. The specific name is referring to the wide prosternal process.

Remarks. The new species is similar to Phaedon geminatus , but it can be distinguished from the latter by elytra with single striae.

Distribution. China (Sichuan).

Figures

Fig. 18. Phaedon mellyi Achard, 1926, SEM. A. Head and thorax, dorsal view. B. Head, dorsal view. C. Base of elytra. D. Base of Elytra, high magnification, showing punctures. Scale bars: A, C=0.2mm; B, D=0.1mm.

Fig. 19. Phaedon mellyi Achard, 1926. A. Antenna, male. B. Aedeagus, lateral view. C. Aedeagus, dorsal view. Scale bars: A= 0.5mm; B–C=0.2mm.

Fig. 20. Phaedon prosternalis Daccordi & Ge, sp. nov., SEM. A. Habitus, dorsal view. B. Maxillary palpi. C. Head and prothorax, ventral view. D. Head and thorax, ventral view. Scale bars: A, D =1mm; B=0.1mm; C=0.5mm.

Fig. 21. Phaedon prosternalis Daccordi & Ge, sp. nov. 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.