Taxonomy

Microperus Wood, 1980: 94.

Diagnosis

1.20−3.10 mm long, 2.93−3.17 times as long as wide. Microperus can be distinguished by the scutellum either narrow, minute, convex and slightly raised above elytra or not visible; dense tuft of setae present along elytral base associated with an elytral mycangium; elytral bases sinuate, costate; antennal club obliquely truncate (type 2) or flattened, types 3 or 4, sutures gently sinuate and pubescent on anterior face, 1−3 sutures visible on posterior face; pronotum from lateral view taller than basic (type 2) or with pronotal disc longer than anterior slope (type 7); pronotum from dorsal basic and parallel-sided (type 2), or subquadrate (type 3), and anterior margin of pronotum without a row of serrations. In addition the procoxae contiguous, protibia outer margin obliquely or distinctly triangular, armed by 6−8 denticles, posterior face flattened, unarmed.

May be confused with

Coptodryas and Xyleborinus

Distribution

throughout the Paleotropics, Australia, and Oceania

Gallery system

The tunnels are irregularly branched, more or less in one transverse plane, and enlarged into small brood chambers in the longitudinal plane in places. In a few species (e.g. M. corporaali, M. nugax, M. undulatus), the brood chambers are in the transverse plane (Browne 1961b).

Remarks

Hulcr and Cognato 2013 suggest that the species may engage in communal breeding, as a result of interconnecting gallery systems.

Microperus is paraphyletic with several species of Coptodryas. Further study is necessary to delimit both genera.