Dorsal, lateral and declivital view of Amasa tropidacron holotype, 2.5–2.8 mm (A, B, G), A. versicolor, 2.5–2.6 mm (C, D, H), and A. youlii holotype, 2.9–3.0 mm (E, F, I).

  Part of: Smith SM, Beaver RA, Cognato AI (2020) A monograph of the Xyleborini (Coleoptera, Curculionidae, Scolytinae) of the Indochinese Peninsula (except Malaysia) and China. ZooKeys 983: 1-442.