Carchesiopygus assamensis (Beeson)

Beaver, Roger A. & Sanguansub, Sunisa, 2015, A review of the genus Carchesiopygus Schedl (Coleoptera: Curculionidae: Platypodinae), with keys to species, Zootaxa 3931 (1), pp. 401-412 : 406-408

Carchesiopygus assamensis (Beeson)

(Figs 3–4)

Crossotarsus assamensis Beeson, 1937: 59 .

Carchesiopygus assamensis (Beeson) : Browne, 1962: 647.

Taxonomy. Both sexes were described by Beeson (1937). The types are inaccessible (IFRI), and the species has been recognised on the basis of the description, and a female collected and identified by Beeson in NHML. We have also examined specimens from China, India, Laos and Thailand in NHMB, NKME and RAB. Schedl (1969) notes that the types are labelled Carchesiopygus wollastoni assamicus . This species is closely related to C. wollastoni , and the males are separable only on minor characters of pronotal and elytral sculpture (see key to males). However, the females are easily separable by the size and number of mycangial pores on the pronotum (see key to females).

Distribution. China (Yunnan), India (Assam), Laos, Thailand.

New records. CHINA, S. Yunnan, (Xishuangbanna), 23 km NW Jinghong, vic. Na Ban (NNNR), 22o9.49'N, 100o39.92'E, 730m, secondary forest, EKL, 30.x.2008 (L. Meng) (3♂, 3♀); as previous except: transition zone, M[alaise]F[alle], 28.vi.2008 (A. Weigel) (2♂, 2♀); as previous except; 8.vi.2008 (1♀); as previous except: 24 km NW Jinghong, vic. Zhong Zhi Chang, 22o11.06'N, 100o39.05'E, 780m, rubb[er] plant[ation], EKL, 20.x.2008 (A. Weigel) (1♀); LAOS, Khammouane pr., Hin Boun riv., Ban Nathan, Camp de l’Agame, 17o59.773'N, 104o49.396'E, valley forest, piège Malaise géant, IBCFL, Opération Canopée, 17-22.v.2012 (H-P. Aberlenc)(1♀).

Biology. The only recorded host is Vatica lanceaefolia (Dipterocarpaceae) ( Beeson 1937, Beaver & Liu 2013).

PLATE 3. Dorsal views of Carchesiopygus species. Figure 5. C.impariporus (Beeson) male. Figure 6. C.multidentatus Schedl male. Figure 7. C.oculatus (Beeson) female. Scale line = 2 mm.

PLATE 4. Dorsal and lateral views of Carchesiopygus species. Figure 8. C.impariporus (Beeson) female head and pronotum dorsal view. Figures 9–10. C.alternantes Schedl male elytral declivity dorsal and lateral views. Scale line = 1 mm.