Webbia biformis Browne, 1958

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 biformis Browne, 1958 Fig. 79A, B, I

Webbia biformis Browne, 1958: 496.

Type material.

Holotype (NHMUK), paratypes (NHMUK, 3).

Diagnosis.

2.4-3.0 mm long (mean = 2.67 mm; n = 3); 3.43-3.75 × as long as wide. This species is distinguished by the circumdeclivital margin denticulate; declivital face bearing a large triangular spine that is as much broader at apex than base; base of spine elongate, occupying approximately 1/3 of declivital length; acute spine at elytral apex arising from the sutural interstriae; and discal interstriae 1 denticulate, never prolonged into a short spine over the declivity.

Similar species.

Webbia diversicauda , W. pabo .

Distribution.

East & West Malaysia, Thailand.

Host plants.

Associated with Dipterocarpaceae ( Dipterocarpus , Hopea , Shorea ) ( Browne 1961b; Beaver and Browne 1975, 1979).

Remarks.

Brood size can be as high as 120 in a gallery ( Beaver and Browne 1979).

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).