Taxonomic history

Xyleborus quadrispinosulus Eggers, 1923: 189.

Diuncus quadrispinosulus (Eggers): Hulcr and Cognato, 2009: 34.


Xyleborus parvispinosus Schedl, 1951a: 78Schedl, 1958c: 147.

Xyleborus parvispinosus palembangensis Schedl, 1939b: 43. Schedl, 1958c: 147.


1.8−1.9 mm long (mean = 1.82 mm; n = 5); 2.25−2.57 times as long as wide. This species can be distinguished by the elytrall summit armed by two pairs of minute denticles, one pair on interstriae 2 and the other on interstriae 3.

May be confused with

Diuncus haberkorni, D. mucronatus, and D. mucronatulus


East & West Malaysia, Indonesia (Java, Sumatra), Myanmar, New Guinea, Thailand, Vietnam

Host plants

polyphagous (Browne 1961b)

DNA data

Sequences available for COI and CAD.

COI: HM064064

CAD: HM064242