Diuncus mucronatulus

Taxonomic history

Xyleborus mucronatulus Eggers, 1930: 199.

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

Diagnosis

1.5 mm long; 2.37 times as long as wide. This species can be distinguished by its minute size; pronotumpronotum:
the dorsal surface of the thorax
conical frontally and angulate (type 6) in dorsaldorsal:
of or relating to the upper surface; opposite of ventral
view; pronotalpronotal:
pertaining to the pronotum
summit at anterioranterior:
the front or forward; opposite of posterior
3/8, basalbase:
point or edge closest to the body; opposite of apex
5/8 punctatepunctate:
set with fine impressed points, appearing as pin pricks
; elytralelytral:
pertaining to the elytra
summit armed by two pairs of large denticlesdenticle:
a small tooth, the sides of which are equal and the tip is above the middle of the base
, one pair on interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
2, the other on interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
3; pronotumpronotum:
the dorsal surface of the thorax
as long as wide; declivitydeclivity:
downward slope of either the pronotum or elytra
appearing weakly bisulcatebisulcate:
pertaining to an elytral declivity with two suci; a sulcus present on each elytron but the suture remains convex
; and interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
1, 3−6 flat to weakly convexconvex:
appearing rounded
giving the declivitydeclivity:
downward slope of either the pronotum or elytra
a finely sculptured appearance.

May be confused with

Diuncus haberkorni, D. mucronatus, and D. quadrispinulosus

Distribution

India (West Bengal). 

Host plants

recorded only from Mesua (Calophyllaceae) (Beeson 1930Beeson 1930:
Beeson CFC. 1930. The biology of the genus Xyleborus , with more new species. Indian Forest Records 14: 209-272.)

Remarks

The species was found associated with Xylosandrus mesuae (Eggers) (Beeson 1930Beeson 1930:
Beeson CFC. 1930. The biology of the genus Xyleborus , with more new species. Indian Forest Records 14: 209-272.).

DNA data

specimens not available for sequencing