Resumo

ANDERSEN, Trond  e  MENDES, Humberto Fonseca. A new species of Rheocricotopus Brundin from Mato Grosso, Brazil (Diptera: Chironomidae, Orthocladiinae). Biota Neotrop. [online]. 2012, vol.12, n.1, pp. 111-115. ISSN 1676-0603.  http://dx.doi.org/10.1590/S1676-06032012000100010.

Rheocricotopus (Psilocricotopus) sirventorum sp. n. is described and figured based on a male from Mato Grosso, Brazil. It is tentatively placed in subgenus Psilocricotopus Sæ,ther as it has a triangular, subapical crista dorsalis and a rounded superior volsella. However, the new species apparently lacks acrostichals and has 40 dorsocentrals in 1-4 irregular rows.

Palavras-chave : Chironomidae; Orthocladiinae; Rheocricotopus; Psilocricotopus; new species; Mato Grosso; Brazil; Neotropical region.