Webbia trigintispinata Sampson, 1922

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 trigintispinata Sampson, 1922 Fig. 81A, B, E

Webbia 14-spinatus [sic] Sampson, 1922: 149.

Webbia 26-spinatus [sic] Sampson, 1922: 149. Synonymy: Browne, 1963: 57.

Webbia trigintispinatus [sic] Sampson. Browne, 1968b: 133.

Webbia vigintisexspinata Sampson. Corrected name.

Webbia mucronatus Eggers, 1927b: 107. syn. nov.

Type material.

Holotype Webbia trigintispinata (NHMUK). Holotype Webbia mucronatus (NMNH).

New records.

Ceylon [Sri Lanka]: Galle district, Kanneliya, 250 m, 23.v.1975, S.L. Wood, collected from log (NMNH, 1). Kalutara district, Morapitiya, 250 m, 27.v.1975, S.L. Wood, misc. hosts (NMNH, 1). Vietnam: Cochinchine, F. de Thuc-Trong, 1934, Caresche (MNHN, 2).

Diagnosis.

3.0 mm long (mean = 3.0 mm; n = 5); 3.0 × as long as wide. This species is distinguished by the margin of declivity with 13-15 teeth on each side; declivital face with the vermiculate ridge on interstriae 1 strongly raised in middle of declivity, and with three or four rows of tubercles lateral to it; and elytral disc shiny to upper margin of declivity, apart from grooves between marginal teeth.

Similar species.

Webbia dipterocarpi , W. duodecimspinata , W. quatuordecimspinata .

Distribution.

Cambodia, India (Andaman Is, Assam), Indonesia (Sumatra), East & West Malaysia, Philippines, Sri Lanka*, Thailand, Vietnam.

Host plants.

Associated with Dipterocarpaceae ( Dipterocarpus , Dryobalanops , Hopea , Shorea ) ( Beeson 1961; Ohno 1990).

Remarks.

The species name 26-spinatus is an incorrect original spelling which is here corrected to vigintisexspinata . The corrected name is a subjective synonym of Webbia trigintispinata . Images of the W. mucronatus holotype were examined by all authors and found to be conspecific with the W. trigintispinata holotype and non-type specimens. It is here placed in synonymy.

Figures

Figure 81. Dorsal, lateral and declivital view of Webbia trigintispinata, 3.0 mm (A, B, E), and W. turbinata, 2.2 - 3.4 mm (C, D, F).