Abstract
Caudafistulus n. gen. is described to accommodate Brachybaenus rubrinervosus, a species of Raspy Cricket from the Colombian Andes, endemic to the highlands of the Aburra Valley and the eastern subregion of the department of Antioquia. Caudafistulus rubrinervosus n. comb. differs from Brachybaenus species, due to its conspicuous frontal ocellus, male terminalia with processes on the tenth tergite, subgenital plate modified, and genitalia with sclerotized areas, being one of the few genera of gryllacridids known with this peculiarity in the world. Finally, the similarity of copulatory structures with old-world taxa and their possible function for mating is discussed.
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