Description of a new genus and two new species of Anacolini (Coleoptera, Cerambycidae, Prioninae) from South America Author Galileo, Maria Helena M. Museu Anchieta de Ciências Naturais, Porto Alegre, RS, Brazil. E-mail: galileomh @ yahoo. com Author Komiya, Ziro 3 - 2 - 12, Shimouma, Setagaya-ku, Tokyo, 154 - 0002, Japan. Email: z-com 321 @ eurus. dti. ne. jp Author Santos-Silva, Antonio Museu de Zoologia, Universidade de São Paulo, São Paulo, SP, Brazil. E-mail: toncriss @ uol. com. br text Zootaxa 2018 2018-10-16 4500 2 281 288 journal article 10.11646/zootaxa.4500.2.8 1175-5326 5297649 D46FEE50-D9E4-49C1-8580-61C9A254C876 Key to males of Oideterus 1. Elytral apex just short of attaining abdominal ventrite I apex. Ecuador ................................ O. crenatocerus - Elytral apex surpassing apex of abdominal ventrite I.......................................................... 2 2(1). Outer apex of antennomere IV triangularly projected; elytra surpassing base of abdominal ventrite V. Colombia ...... O. birai - Outer apex of antennomere IV distinctly pectinate; elytra reaching at most the base of abdominal ventrite IV............. 3 3(2). Prosternal process triangularly narrowed at apex. Ecuador , Colombia ..................................... O. buquetii - Prosternal process with rounded apex...................................................................... 4 4(3). Lateral tubercle of prothorax spiniform; outer margin of the elytra slightly, uniformly rounded from base to apex. Ecuador ............................................................................................ O. dichotomus - Lateral tubercle of prothorax triangular; outer margin of the elytra sub parallel-sided at posterior half. Colombia . O. andrarius