throughout the Paleotropics, Australia, and Oceania
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).
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.