ACRORIELLUS, A NEW WEEVIL GENUS OF NORTHERN ANDEAN LISTRODERINA (INSECTA, COLEOPTERA, CURCULIONIDAE)

Acroriellus gen. n. is endemic to higher elevations of the northern An des, and is recognized by the following characters: elytra with three tubercles on interval 3, one of them conical; the presence of a decliv ital tubercle on interval 2; and the anteapical tubercle absent. Diagn oses, descriptions and illustrations of the genus and six new species are given, type localities are mapped, and a key to species is present ed. A cladistic analysis using 13 characters of external morphology an d genitalia produced three cladograms; successive weighting resulted i n a single cladogram. Species follow the sequence A. vittetae, A. cari natus, A. tuberculosus, A. bobi, A. similaris, and A. viridisquamosus. The cladistic biogeographic analysis of Acroriellus, Acrorius Kirsch, Macrostyphlus Kirsch, and Nacodius Morrone indicates the following se quence of area-fragmentation: ([Venezuela (Colombia, northern Ecuador) ], [southern Ecuador (northwestern Peru, southern Peru)]).