Dichotomius ribeiroi ( Pereira, 1954 )

Arias-Buriticá, Jorge Armando & Vaz-de-Mello, Fernando Z., 2019, Redefinition and taxonomic revision of the “ buqueti ” species-group, Dichotomius Hope, 1838 (Coleoptera: Scarabaeidae: Scarabaeinae), Revista Brasileira de Entomologia 63 (1), pp. 43-52 : 51

Dichotomius ribeiroi ( Pereira, 1954) *

Diagnosis: Triangular head. Males with cephalic process at the front, flattened anddirected backwards. Femaleswith cephalicprocess with broad base, ending in two processes. Males and females witha deepand smoothexcavation inthe centralzone of the pronotum. Head, thorax and elytra with calluses that give a corrugated appearance (for a detailed description see Arias-Buriticá and Vazde-Mello, 2013).

Commentaries: Because of the morphology of the headand pronotum, this species was included in the “ buqueti ” species-group, however, due to characteristics of the morphology of the male genitalia and calluses on the head, pronotum and elytra this was transferred to the “cotopaxi” species-group ( Arias-Buriticá and Vaz-de-Mello, 2013).