Debus Hulcr & Cognato, 2010

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

Debus Hulcr & Cognato, 2010

Debus Hulcr & Cognato, 2010a: 13.

Type species.

Xyleborus emarginatus Eichhoff, 1878; original designation.

Diagnosis.

2.2-5.4 mm, 2.68-3.85 × as long as wide. Debus is distinguished by the pronotal disc flat and elongate, pronotum from dorsal view long, rounded frontally (type 9, rarely type 7); elytral apex emarginate (except D. adusticollis in our region); elytra typically strongly excavated and explanate; first declivital interstriae broadened, laterally displacing strial punctures; protibiae distinctly triangular with fewer than six large denticles on lateral margin. In addition, mycangial tufts are absent, procoxae are contiguous and scutellum flat and flush with the elytra.

Similar genera.

Streptocranus .

Distribution.

Common in tropical forests throughout South Asia to the far reaches of the Pacific Ocean.

Gallery system.

This usually has a transverse surface gallery between the bark and wood, part of which is expanded by the larvae into a brood chamber in which many of them develop. Further branching tunnels penetrate directly into the wood. These too develop brood chambers in the longitudinal plane. Brood development proceeds normally in the wood, if the tree is debarked. In some species (e.g., D. adusticollis ), surface galleries and brood chambers have not been observed ( Kalshoven 1959b; Browne 1961b).