New species, redescription and taxonomic notes in the Dichotomius (Luederwaldtinia) batesi (Harold) species-group (Coleoptera: Scarabaeidae: Scarabaeinae) Author Vaz-De-Mello, Fernando Z. Author Nunes, Rafael V. text Zootaxa 2016 4139 2 294 300 journal article 10.11646/zootaxa.4139.2.12 19d9d549-a90a-4812-a420-658b019a7c36 1175-5326 264822 D4B4C1E3-F897-411D-B03B-0C0C054B4EA6 Dichotomius (Luederwaldtinia) joelus Gandini and Aguilar, 2009 : 143 . This species have been assigned to the Dichotomius batesi species-group, however it lacks the main diagnostic character of batesi group that is the ocellate punctures on pronotal disc - “ El disco (del pronotum) casi liso, com puntos superficiales pequeños ” (disc almost smooth, with small superficial punctures) ( Gandini & Aguilar, 2009 ). After examining original description, pictures, and one couple of paratypes , we concluded that this name is a new synonym of Dichotomius opacipennis (Luederwaldt, 1931) , then belonging to the Dichotomius geminatus speciesgroup as defined by Nunes and Vaz-de-Mello (2013) . As several syntypes of D. opacipennis were examined and all correspond to the same species, we will include their listing and lectotype designation in the ongoing revision of that species-group.