Revisão taxonômica de Pseudogaurax Malloch, 1915 (Diptera: Chloropidae: Oscinellinae) da Região Amazônica

Abstract

Pseudogaurax Malloch, 1915 (Diptera: Chloropidae: Oscinellinae) is composed by flies with body length between 2.0 - 4.0 mm, with apical arista, pubescent eyes, thorax with typically yellow and black dorsal coloration pattern, triangular scutellum with divergent, closely inserted apical bristles, posterior tibia with a tibial organ present. To date, the genus has 13 records for Brazil, and only two occurring in the Amazon region. We studied the Amazonian species, which descriptions and redescriptions were made based on the external morphology and male and female terminalia. The material studied was obtained from several Brazilian zoological collections. Redescriptions were based on the original descriptions, as well as on the examination of type specimens and additional material. An identification key to the Brazilian species and distribution maps for the Amazonian species were provided. Three species were reviewed: P. souzalopesi Sabrosky, 1989 and P. trilineatus (Duda, 1930) which have been recorded previously for the Amazon region, and P. tibialis Malloch, 1934 a new record for North Brazil, and six new species were added to the genus: P. flaviscutellatus sp. nov., P. infulatus sp. nov., P. longitriangularis sp. nov., P. pallidus sp. nov. and P. poseidoni sp. nov.. With such improvements, Pseudogaurax now includes 19 species registered in Brazil and nine occurring in the Amazon region.