Diuncus mucronatus

Taxonomic history

Xyleborus mucronatus Eggers, 1923: 191.

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

Diagnosis

2.0−2.5 mm long (mean = 2.26 mm; n = 5); 2.33−2.78 times as long as wide. This species can be distinguished by the elytralelytral:
pertaining to the elytra
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 and 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
longer than wide; declivitydeclivity:
downward slope of either the pronotum or elytra
appearing strongly bisulcatebisulcate:
pertaining to an elytral declivity with two suci; a sulcus present on each elytron but the suture remains convex
; interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
1, 3−6 clearly convexconvex:
appearing rounded
giving the declivitydeclivity:
downward slope of either the pronotum or elytra
a rugged appearance.

May be confused with

Diuncus haberkorni, D. mucronatulus, and D. quadrispinulosus

Distribution

China (Guizhou, Hong Kong, Jiangsu), Indonesia (Java), Japan, East & West Malaysia, New Guinea, Philippines, Thailand, Vietnam

Host plants

polyphagous (Browne 1961bBrowne 1961b:
Browne FG. 1961b. The biology of Malayan Scolytidae and Platypodidae. Malayan Forest Records 22: 1-255.)

DNA data

Sequences available for COI and CAD.

COI: MN619911; MN619912; MN619913

CAD: MN620190; MN620191; MN620192