Debus pseudocylindricus (Eggers) comb. n.

Xyleborus pseudocylindricus Eggers (1927b)

Specimens examined. Indonesia, Sumatra, (holotype, USNM); Malaysia, Sabah, Danum Valley (18, Hulcr det., MSUC).

Comments. D. pseudocylindricus possesses all the diagnostic features of Debus, including antennal club form, elongated pronotum, and emarginate declivity. Its placement in Debus was confirmed by molecular phylogenetic analysis (72% and 74% posterior probability, Cognato et al., 2011). Morphologically, the species is intermediate between D. pumilus and D. fallax in terms of declivital armature and body proportions.