Genyocerus exilis (Schedl)

Beaver, R. A. & L. - Y, 2007, A review of the genus Genyocerus Motschulsky (Coleoptera: Curculionidae: Platypodinae), with new synonyms and keys to species, Zootaxa 1576 (1), pp. 25-56 : 35-36

Genyocerus exilis (Schedl)

( Figs 9–10 )

Diacavus exilis Schedl, 1942: 218 (male); Browne, 1962: 219 (female).

Genyocerus exilis (Schedl) : Browne, 1980a: 371.

Taxonomy: We have examined the male and female specimens taken in association by F. G. Browne and used by him to describe the female (BMNH) and have compared them with specimens of both sexes collected in Brunei (BMNH) and Sabah (ZMLU, RAB). The males are characterised by the presence of a large mycangial pore close to the midline on each side and lateral to these a group of 5–13 smaller pores. In the females, there are usually two large pores in addition to the group of smaller pores. In both sexes, occasional individuals lack the large pores.

Distribution: East Malaysia ( Sarawak), Indonesia (Maluku, Bacan I.), West Malaysia. It is newly recorded here from Brunei Darussalam and Sabah. It has been intercepted in Japan in timber from Borneo and Maluku.

New Records: BRUNEI: 4 o 34'N, 115 o 7'E, Kuala Belalong FSC, Dipterocarp forest , 220 – 275 m. alt, fogging, malaise trap, flight intercept trap, various dates from 16.vi.1991 – 6.viii.1991, 8.ii.1992, 10.iii.1992 (N. Mawdsley) (8 ♂, 10 ♀) ( BMNH); MALAYSIA: Sabah, Sipitang, Mendolong, 8.xii.1987, various dates from 10.iv.1988 – 13.v.1988, 10 – 31.iii.1989 (S. Adebratt) (20 ♂, 32 ♀) ( ZMLU, RAB); Sabah, Poring Spring , lower montane, mixed dipterocarp forest,> 650m. , fogging Aporusa sp. , 22.iii.1993 (A. Floren) (1 ♂) ( BZUW) .

Biology: Recorded from the following genera of Dipterocarpaceae : Anisoptera , Dipterocarpus , Dryobalanops , Shorea , Upuna , Vatica ( Browne 1961a, Ohno 1990b)..

Figures

PLATE 3. FIGURE 8. Genyocerus diaphanus (Schedl) dorsal view of male. FIGURE 9. Genyocerus exilis (Schedl) lateral view of male elytra. FIGURE 10. Genyocerus exilis (Schedl) lateral view of female head.