Downesia kwangtunga Gressitt, 1950

Sekerka, Lukáš, Jia, Fenglong, Pang, Hong & Borowiec, Lech, 2016, Cassidinae (Coleoptera: Chrysomelidae) types deposited at Sun Yat-sen University, Guangzhou, China, Zootaxa 4084 (1), pp. 50-78 : 63

Downesia kwangtunga Gressitt, 1950

( Fig. 17 )

Downesia kwangtunga Gressitt, 1950: 84 .

Type locality. China, Guangdong prov., Lianping Co., Jiulianshan Mt., approx. 24°27.3′N, 114°33.8′E, 400–500 m a.s.l.

Original type series. Holotype ( LMNH) and one paratype from the same locality with unstated depository.

Type material examined. Holotype, glued: ‘Kwangtung, S. China | Kau-lin Shan, 700-900 | M. Lien pʼing Dist. | April 22, 1940 J. L. | Gressitt and F. K. To. [w, p, cb] || HOLOTYPE | DOWNESIA [hw] | KWANGUNGA [hw] | J.L.Gressitt [r, p + hw by Gressitt, cb] || M-307 [w, hw, cb] || [vernacular name in Chinese, hw] | Downesia [hw] | kwangtunga Gressitt [hw] | det. Li-Zhong Hua [in Chinese, p] 1987 [hw] [w, p, cb] || En-289764 | [Data Matrix barcode] SYS [w. p, cb]’.

Current status. Valid species.

Remarks. Gressitt (1950) stated that the species differs from others in having just a single row of punctures between suture and the first costa. Chent et al. (1986) followed Gressitt and placed it in the key based on this character. However, holotype shows shortened row of several punctures on apical fifth of the elytra. Thus the species should be placed next to D. atrata Baly, 1869 in the key proposed by Chen et al. (1986). Downesia kwangtunga can be easily separated from D. atrata by smaller and narrower body (3.5–5.5 mm x 1.1–1.7 mm) distinctly constricted behind humeral calli and then widening posteriorly and elytra with high and sharp costae while D. atrata is larger and stouter (5.5–7.5 mm x 2.0 mm) without conspicuous constriction behind humeral calli and with elytral costae low and blunt.

Figures

FIGURES 12 – 19. 12. Wallaceana foveicollis Gressitt, 1939 (holotype, 4.3 mm); 13. Planispa castaneipennis Chûjô, 1937 (syntype, 8.4 mm); 14. Agonita picea Gressitt, 1953 (holotype, 5.4 mm); 15. A. sculpturata Gressitt, 1953 (holotype, 5.0 mm); 16. Downesia balyi Gressitt, 1950 (holotype, 5.7 mm); 17. D. kwangtunga Gressitt, 1950 (holotype, 4.5 mm); 18. Neodownesia rubra Gressitt, 1953 (holotype, 6.5 mm); 19. Chaeridiona cupreoviridis Gressitt, 1950 (holotype, 3.8 mm).