A new, darkwinged species of Pseudochironomus Malloch, 1915 (Diptera: Chironomidae) from Mexico and Costa Rica

Abstract

A new species of Pseudochironomus Malloch, 1915 is described and figured as adult male and female based on material from Chiapas (Mexico) and Heredia (Costa Rica). Pseudochironomus seipi sp. n. can be distinguished from all other species of Pseudochironomus as it has two dark bands across the wing and a small tubercle in mid scutum; all other described species have wings without dark spots or bands, and they all lack scutal tubercle. It can also be separated from other Neotropical species by having 25–30 dorsocentrals in double to triple row; all other described Neotropical species have dorsocentrals in a single row. Including this new species, 10 Pseudochironomus species are described from the Neotropical Region.