Hadrodemius Wood, 1980

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

Hadrodemius Wood, 1980

Hadrodemius Wood, 1980: 94.

Type species.

Xyleborus globus Blandford, 1896b; original designation.

Diagnosis.

Hadrodemius species are distinguished by their large size, 4.9-7.2 mm and stout (less than 2 × as long as wide) and hairy appearance; pronotal base and scutellar area ornamented with a dense tuft of hair associated with mesonotal mycangium; scutellum visible only on the basal slope of elytral bases; procoxae contiguous; and the pronotal lateral margins rounded.

Similar genera.

Hadrodemius is closely related to Anisandrus , Cnestus , and Xylosandrus , all of which possess a mesonotal mycangium and the associated dense tuft of hair-like setae at the scutellar area and pronotal base ( Gohli et al. 2017; Johnson et al. 2018). These three genera is distinguished from Hadrodemius by their normal scutellum that is flush with the dorsal surface of the elytra rather than just visible only on the basal slope of the elytral bases.

Distribution.

Hadrodemius occurs in tropical areas from India in the West, through the Oriental region to New Guinea and the Solomon Islands in the East.

Gallery system.

Usually constructed in small stems from 1.5 - 5.0 cm diameter, it comprises a circumferential entrance gallery leading to one to several longitudinal galleries ( Beaver 2010).

Remarks.

Further details of the biology are given by Browne (1961b), Kalshoven (1959b) and Beaver (2010).