Taxonomic revision of the Dichotomius (Selenocopris) carbonarius species group (Coleoptera: Scarabaeidae: Scarabaeinae)

The Dichotomius ( Selenocopris ) carbonarius species group now comprises eleven species, some of which are widely distributed with occurrence from Ecuador to Argentina: Dichotomius carbonarius (Mannerheim, 1829), Dichotomius cuprinus (Felsche, 1901), Dichotomius glaucus (Harold, 1869) Dichotomius luctuosus (Harold, 1869), Dichotomius lycas (Felsche, 1901), Dichotomius opacus (Blanchard, 1846) status. rev. Dichotomius schmidti sp. nov. , Dichotomius dimarei sp. nov. , Dichotomius zenaldoi sp. nov. , Dichotomius aguilari sp. nov. and Dichotomius jarafaeli sp.nov. Lectotypes are designate for D. carbonarius, D. cuprinus, D. glaucus, D. luctuosus , and D. lycas. Dichotomius pseudocuprinus Gandini & Aguilar, 2009 is here proposed as a junior subjective synonym of D. lycas. D. interstitialis is placed in its own species group. Key to the species, diagnoses, and distribution maps are provided. The components of the male genitalia of these species are described and illustrated for the first time.