Webbia cornuta Schedl, 1942

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 cornuta Schedl, 1942 Fig. 79C, D, J

Webbia cornutus [sic] Schedl, 1942a: 183.

Type material.

Lectotype (NHMW). Not examined.

Diagnosis.

1.9-2.2 mm long (mean = 2.02 mm; n = 5); 3.14-4.0 × as long as wide. This species is distinguished by the circumdeclivital margin denticulate; declivity rather smooth and strongly shiny; declivital striae 1 and 3 very weakly impressed, declivital interstriae without granules; declivital strial and interstrial punctures very fine, of the same size, bearing short fine hair-like setae; short acute elytral process arising from declivital margin; and elytral apex entire.

Similar species.

Webbia turbinata .

Distribution.

‘Borneo’, East & West Malaysia, Thailand.

Host plants.

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

Remarks.

As in W. biformis , brood size can be large (up to 87) ( Beaver and Browne 1979). The majority of the records from Thailand listed under this species by Beaver et al. (2014) should be transferred to W. turbinata . The records from the southern provinces of Chumphon and Nakhon Sri Thammarat are correct.

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).