Abstract

A new genus of leaf beetles, Aulacioides gen. n., and a new species, Aulacioides spiridonovi sp. n., are described. Aulacia laeta L. Medvedev 2004 is transferred to Aulacioides, comb. n., also being the type species of the new genus. Four new species of Aulacia Baly are described: A. guskovae sp. n., A. limbipennis sp. n., A. longicostata sp. n. and A. moseykoi sp. n. Three new species of the genus Colaspoides Laporte are described from Java, Indonesia: C. filimonovi sp. n., C. fuscoaenoides sp. n. and C. pangrangensis sp. n. Three further species of Colaspoides are transferred to Aulacia: A. bicoloricollis (L. Medvedev et Romantsov 2014), A. cyaneipennis (L. Medvedev 2004) and A. minuta (L. Medvedev 2006), all comb. n. New identification keys are compiled to almost all species of Aulacia, to both species of Aulacioides gen. n., and to all known members of Colaspoides from Java. The following new species groups showing similar characters are proposed: the femorata group from Borneo for the species with a narrow frons and a keel on the pygidium, this group including A. femorata Baly 1867, A. fulviceps Baly 1867 and A. longicostata sp. n.; the cyaneipennis group, again from Borneo, for the species with a wide frons and a wide lateral border of the elytra, the aedeagus being truncated at the apex and bearing a tooth in the middle, and the pygidium showing no keel; this group includes A. cyaneipennis, A. limbipennis sp. and A. moseykoi sp. n. The diversa group is proposed, and its taxonomic status discussed, to incorporate three poorly studied and similar species of Aulacia: A. diversa Baly 1867, A. flavifrons Jacoby 1896 and A. fulvicollis Jacoby 1899, all from Malacca and Sumatra and all sharing a completely or partially black body upperside and several carinae on the sides of the elytra in females. Aulacia brunnea Jacoby 1894 is recorded from Sumatra for the first time. Photographs both of the adult habitus in dorsal view and the genitals are provided for almost all of the above closely related species. A new name, Colaspoides alexei nom. n., is proposed to replace Colaspoides aeneoviridis Romantsov et Moseyko 2023, a junior homonym of Colasposoma aeneoviride Clark 1865, the latter species subsequently synonymized with Colaspoides cuprea Baly 1867.

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