A new species of the predaceous midge genus Stilobezzia Kieffer from the Nahuel Huapi National Park, Argentina (Diptera: Ceratopogonidae)

Abstract

A new species of Stilobezzia (Acanthohelea), collected in the Nothofagus forests of the Nahuel Huapi National Park (Argentina), is described, phopographed and illustrated based on the examination of male and female adults. The new species can be easily recognized by the elongate and narrow posteromedian projection of the male sternite 9; it is compared with S. (A.) hirsuta Ingram & Macfie. A new species, Stilobezzia (Acanthohelea) longisternalis, collected in the Nothofagus forest of the Nahuel Huapi National Park (Argentina) is described, photographed and illustrated based on the examination of male and female adults. The new species can be easily recognized by the elongate and narrow posteromedian projection of the male sternite 9; it is compared with S. (A.) hirsuta Ingram & Macfie.