Taxonomic history

Xyleborus nugax Schedl, 1939a: 353.

Coptodryas nugax (Schedl): Wood, 1989: 171.

Microperus nugax (Schedl): Hulcr, 2010: 112.


1.8−1.9 mm long (mean = 1.84 mm; n = 4); 2.57−2.71 times as long as wide. This species is distinguished by the declivital interstriae densely covered with long erect hair-like setae; elytral disc medially convex, appearing humped; elytral declivity long, gradual; all declivital interstriae uniformly granulate from base to apex; declivital face convex; posterolateral carina granulate; antennal club flat, type 3 with two sutures visible on posterior face; and elytral declivity shagreened, dull.

May be confused with

Microperus cruralis, M. sagmatus, and M. undulatus


‘Borneo’, Brunei, Indonesia (Java, Sulawesi), East & West Malaysia, Thailand, Vietnam

Host plants

polyphagous (Browne 1961b)

DNA data

Sequences available for COI and CAD.

COI: MN619981

CAD: MN620255