Found throughout tropical South Asia and Oceania, rare in temperate East Asia. Multiple species near E. fornicatusintroduced to North America (Gomez et al. 2018).
This consists of branched tunnels, either in one horizontal plane or extending into three dimensions, and penetrating deeply into the wood. Brood chambers are absent. In small diameter stems, the galleries may be longitudinal.
Euwallacea is arguably one of the most challenging Xyleborini genera, as it contains a number of species that are clearly defined with molecular data but for which few diagnostic morphological characters exist.