Taxonomic history

Xyleborus bicornioides Schedl, 1952a: 368.

Cnestus bicornioides (Schedl): Browne, 1955: 360.

Diagnosis

3.3−3.7 mm long (mean = 3.42 mm; n = 5); 2.36−2.75 times as long as wide. This species can be distinguished by the absence of a mesonotal mycangial tuft on the pronotal base; elongate body; elytral declivity excavated; pronotum from dorsal view type 6; pronotum apex strongly produced, extending to a process with two serrations; mandibles normal; epistoma entire; elytral punctures distinct, clearly uniseriate; interstriae bearing sparse erect hair-like setae; declivital interstriae 2−5 sparsely denticulate; protibia very slender with three large, narrow denticles; antennal club type 2, with two sutures visible on the posterior face; and three segmented antennal funicle.

May be confused with

Cnestus bicornis (Eggers) (from Indomalayan region) and C. quadrispinosus

Distribution

China (Xizang, Yunnan), India (Andaman Is, West Bengal), West Malaysia, Philippines, Thailand

Host plants

recorded from Shorea (Dipterocarpaceae) Swietenia (Meliaceae) (Browne 1961b) and Fagaceae ((Smith et al. 2020b)

Remarks

The entries in Maiti and Saha (2004) under the name Cnestus cruralis (Schedl) refer to this species, which was earlier (Maiti and Saha 1986Saha and Maiti 1996) referred to as C. bicornioides. The species described as Xyleborus cruralis Schedl belongs in the genus Microperus Wood (Beaver 1998).

DNA data

specimens not available for sequencing