A new species of <i>Parapsectrocladius</i> Cranston (Diptera: Chironomidae: Orthocladiinae) from Patagonia, Argentina

Abstract

<i>Parapsectrocladius setosus</i> sp. n. is described and figured as pupa and male imago, based on material collected in Patagonia, Argentina. The male of the new species groups with <i>P. escondido</i> Cranston & Añón Suárez by having the anal point tapering triangular; inferior volsella simple, rounded, without any dorsal ridge and apically blunt. It can be distinguished from <i>P. escondido</i> by the possession of strong setae on the inner margin of inferior volsella. New material of <i>Parapsectrocladius</i> belonging from several localities allows us to emend the generic diagnosis of the adult male, female and larva of <i>Parapsectrocladius</i>, discuss its phylogenetic position and to expand the geographic distribution of <i>P. acuminatus</i> Cranston, <i>P. escondido</i> and <i>P. reissi.</i> Cranston.