Webbia dipterocarpi Hopkins, 1915

Smith, Sarah M., Beaver, Roger A. & Cognato, Anthony I., 2020, A monograph of the Xyleborini (Coleoptera, Curculionidae, Scolytinae) of the Indochinese Peninsula (except Malaysia) and China, ZooKeys 983, pp. 1-442 : 1

Webbia dipterocarpi Hopkins, 1915 Fig. 79G, H, L

Webbia dipterocarpi Hopkins, 1915b: 223.

Webbia octodecimspinatus Sampson, 1921: 32. Synonymy: Wood 1983: 650.

Type material.

Holotype (NMNH).

New records.

Thailand: Trang, Khaophappha Khaochang, 200-400 m, 13.i.1964, G.A. Samuelson (BPBM, 1).

Diagnosis.

3.0-3.2 mm long (mean = 3.12 mm; n = 5); 2.73-2.91 × as long as wide. This species is distinguished by the margin of declivity with nine or ten teeth on each side; declivital face with a weak ridge on interstriae 1, and two rows of tubercles lateral to it; and elytral disc matte on posterior 1/4.

Similar species.

Webbia duodecimspinata , W. quatuordecimspinata , W. trigintispinata .

Distribution.

East & West Malaysia, Philippines, Thailand*, Vietnam.

Host plants.

Associated with Dipterocarpaceae ( Dipterocarpus , Dryobalanops , Hopea , Shorea , Vatica ) ( Browne 1961b; Beaver and Browne 1979; Ohno 1990). Recorded once each from Bridelia and Macaranga ( Euphorbiaceae ) ( Browne 1961b).

Remarks.

Browne (1961b) gives some details of the biology and development period. The record from Vietnam was recorded as W. duodevigintispinatus Sampson by Browne (1968b). Browne later corrected the identification to W. octodecimspinatus in a letter to RAB (F.G. Browne, pers. comm., 18 August 1978).

Figures

Figure 79. Dorsal, lateral and declivital view of Webbia biformis holotype, 2.4 - 3.0 mm (A, B, I), W. cornuta, 1.9 - 2.2 mm (C, D, J), W. dasyura holotype, 2.8 - 2.9 mm (E, F, K), and W. dipterocarpi, 3.0 - 3.2 mm (G, H, L).