Taxonomic history

Xyleborus mucronatulus Eggers, 1930: 199.

Diuncus mucronatulus (Eggers): Hulcr and Cognato, 2009: 33.


1.5 mm long; 2.37 times as long as wide. This species can be distinguished by its minute size; pronotum conical frontally and angulate (type 6) in dorsal view; pronotal summit at anterior 3/8, basal 5/8 punctate; elytral summit armed by two pairs of large denticles, one pair on interstriae 2, the other on interstriae 3; pronotum as long as wide; declivity appearing weakly bisulcate; and interstriae 1, 3−6 flat to weakly convex giving the declivity a finely sculptured appearance.

May be confused with

Diuncus haberkorni, D. mucronatus, and D. quadrispinulosus


India (West Bengal). The inclusion of Indonesia (‘Borneo’, Java), Malaysia, and Thailand in the distribution by Maiti and Saha (2004) is in error.

Host plants

recorded only from Mesua (Calophyllaceae) (Beeson 1930)


The species was found associated with Xylosandrus mesuae (Eggers) (Beeson 1930).

DNA data

specimens not available for sequencing