Immanus sarawakensis (Eggers, 1923)

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

Immanus sarawakensis (Eggers, 1923) Fig. 64C, D, F

Xyleborus sarawakensis Eggers, 1923: 176.

Ambrosiodmus sarawakensis (Eggers): Wood and Bright 1992: 680.

Immanus sarawakensis (Eggers): Beaver et al. 2019: 385.

Type material.

Holotype (MCG).

Diagnosis.

The largest species occurring in Southeast Asia, 7.0-7.8 mm long (mean = 7.26 mm; n = 5); 1.97-2.05 × as long as wide. This species is distinguished by the very large size; rounded declivity; densely setose body; declivital interstriae 2 bearing a row of two or three denticles; and all declivital interstriae are slightly elevated.

Similar species.

Immanus colossus (from Papua New Guinea), I. desectus .

Distribution.

East & West Malaysia, Thailand.

Host plants.

Recorded from Lophopetalum ( Celastraceae ), Parinari ( Chrysobalanaceae ), Xanthophyllum ( Polygalaceae ) and an unidentified genus of Annonaceae ( Browne 1961b).

Figures

Figure 64. Dorsal, lateral and declivital view of Immanus desectus, 5.0 - 5.5 mm (A, B, E), and I. sarawakensis holotype, 7.0 - 7.8 mm (C, D, F).