Abstract
Acroriellus gen. n. is endemic to higher elevations of the northern Andes, and is recognized by the following characters: elytra with three tubercles on interval 3, one of them conical; the presence of a declivital tubercle on interval 2; and the anteapical tubercle absent. Diagnoses, descriptions and illustrations of the genus and six new species are given, type localities are mapped, and a key to species is presented. A cladistic analysis using 13 characters of external morphology and genitalia produced three cladograms; successive weighting resulted in a single cladogram. Species follow the sequence A. vittetae, A. carinatus, A. tuberculosus, A. bobi, A. similaris, and A. viridisquamosus. The cladistic biogeographic analysis of Acroriellus, Acroriellus Kirsch, Macrostyphlus Kirsch, and Nacodius Morrone indicates the following sequence of area‐fragmentation: ([Venezuela (Colombia, northern Ecuador)], [southern Ecuador (northwestern Peru, southern Peru)]).
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