Studies of Bolivian Ptiliidae (Coleoptera) 2: The subfamily Acrotrichinae including two new genera Petrotrichis and Microtrichis, and eight new species of Acrotrichis Author Darby, Michael text Zootaxa 2015 3999 2 190 210 journal article 10.11646/zootaxa.3999.2.2 189ae054-4725-44a7-a7b7-150eda7b7e71 1175-5326 241696 AB50C281-C0D7-4D30-B364-389107D924F4 Key to the Peruvian genera of Acrotrichinae 1. Posterior angles of pronotum not projected rearwards and with a protruding seta; mesoventral collar not sloping posteriorly at the humeri........................................................................... Microtrichis n. gen. - Posterior angles of the pronotum without a seta, projected rearwards; mesoventral collar sloping posteriorly at the humeri.. 2 2. Body rounded, appearing polished and shining, with a small tooth at the hind angles of the pronotum..... Petrotrichis n. gen. - Body flatter, not appearing polished and shining, hind angles of pronotum without a small tooth.... Acrotrichis Motschulsky