Phaedon gressitti Daccordi, 1979

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 : 18-19

Phaedon gressitti Daccordi, 1979 ( Fig. 12 )

Phaedon gressitti Daccordi, 1979: 448 .

Description. Body length 3.1 mm, width 2.3 mm. Body elongate, rather convex, hind wings absent. Colour. Body black except lateral margins of pronotum and elytra, lateral margins of pronotum and elytra yellowish manila. Ventral side of body black, sometimes with metallic blue shining; legs, mouthparts, clypeus, antennae and scutellum brown. Lateral side of pronotum, hypomeron, epipleuron, lateral margin of elytra and elytra suture, base and apex of elytra yellow manila.

Head. Frons and vertex with dense punctures, the diameter same as those of pronotum.

Thorax and abdomen. Pronotum length 0.8 mm, width 1.6 mm; diameter of punctures being one and half times larger than those of elytra. Scutellum subtriangular, with very sparse punctures. Elytra length 2.2 mm; striae regular, interspace with fine and dense punctures. Epipleuron impunctate, with transversal wrinkles especially on apical one third part. Underside. Prosternal process narrow, apex slightly widened; hypomeron, mesoventrite, metaventrite and abdomen with

© Zoological Systematics, 40(1): 1–30 dense and fine punctures; antero-lateral plate of metaventrite large and impunctate.

Aedeagus. Shown as Figs 12B, 12C .

Spermatheca. Unknown.

Material examined. Holotype male, Tibet, Rongshar valley (elev. 2 896 m), 25 June 1924, Maj. R., W.G. Hingston Everest Exp. Brit. ( BMNH).

Remarks. The species can be distinguished by the following characters: black elytra and pronotum, lateral margin with yellowish manila.

Distribution. China (Tibet).

© Zoological Systematics, 40(1): 1–30

Figures

Fig. 12. Phaedon gressitti Daccordi, 1979. A. Antenna, male. B. Aedeagus, dorsal view. C. Aedeagus, lateral view. Scale bars: A= 0.5mm; B–C=0.2mm.