A New Brachypterous Species of Dichotomius Hope, 1838 (Coleoptera: Scarabaeidae: Scarabaeinae) from Bolivia

Abstract

A new brachypterous species of Dichotomius (Selenocopris) Burmeister, 1846 from Bolivia, Dichotomius abayoyensis Amaya, Condori, Copa-Beltrán, Arias-Buriticá, and Vaz-de-Mello, new species is described with diagnosis, photographs, and discussion of its taxonomic position in the genus. This new species is the eleventh known with the brachypterous condition in Dichotomius Hope, 1938. This species belongs to the Dichotomius geminatus (Arrow, 1913) species group and is related to Dichotomius vidaurrei Nunes and Vaz-de-Mello, 2013. Dichotomius abayoyensis differs from D. vidaurrei in having a longer cephalic process, pronotum with anterior excavation, pygidium with distinct punctures on the entire surface, parameres with a pronounced constriction on their distal lateral margins, subgenital plate present with sclerites without projection, and hind wing reduced with a row of dense setae on the superior margin. This species is known only from the “Chaparral de Abayoy” vegetation, located in Roboré (Chiquitos Province, Bolivia).