To the knowledge of the leaf-beetles of the genus Taumacera Thunberg, 1814 (Coleoptera: Chrysomelidae) from Malaysia, Indonesia, and Thailand

Abstract. Ten new species of the genus Taumacera Thunberg, 1814 are described from Malaysia, Indonesia, and Thailand: T. alexklimenkoi sp. n. from the viridis species-group; T. lamellicornis sp. n. from the insignis species-group; T.  pseudoantennata sp.  n. from the antennata species-group; T.  pseudonigricornis sp. n. from the nigricornis species-group;  T.  sinabungensis  sp.  n. and T.  trizonalis sp.  n. from the deusta species-group. Taumacera bezdeki sp.  n. and T.  moseykoi sp.  n., having long antennae covered long, erected setae and metatibiae with apical process, as well as T. carinatipennis sp. n. and T. unicoloripennis  sp. n., having not modified antenna and metatibiae with apical process, are unassigned to any species-group. The figures of general views and aedeagi are given for them and the majority of related species. The new identification keys for males of the antennata and the nigricornis species-groups, as well as for the Sumatran representatives of the deusta species-group with the angulate pronotum are proposed. A new colour form of T. monstrosa (Jacoby, 1899) with darkened elytra is described from Sumatra. Taumacera javanensis (Jacoby, 1895) has antennomeres VII and  VIII dilated with distinct spine directed backwards on the latter and is assigned to the antennata species-group. The lectotype of T.  javanensis is designated. The following new synonymy is proposed: Taumacera antennata (Mohamedsaid, 1997) = T. musaamani (Mohamedsaid, 2010), syn. n.