Diuncus mucronatulus (Eggers, 1930) Fig. 50E, F, K

Xyleborus mucronatulus Eggers, 1930: 199.

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

Type material.

Holotype (FRI).

Diagnosis.

1.5 mm long; 2.37 × as long as wide. This species is 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 and 3-6 flat to weakly convex giving the declivity a finely sculptured appearance.

Similar species.

Diuncus haberkorni, D. mucronatus, D. quadrispinulosus .

Distribution.

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).

Remarks.

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