New records and species of Pseudogaurax Malloch, 1915 (Diptera: Chloropidae) from the Amazon basin.

Pseudogaurax Malloch is a speciose genus of Chloropidae in the Neotropical region. The South American fauna is understudied, particularly in the Amazon basin. Here we provide a taxonomic revision of the Amazonian species of Pseudogaurax, including the description of five new species-P. flaviscutellatus sp. nov., P. infulatus sp. nov., P. longitriangularis sp. nov., P. pallidus sp. nov. and P. poseidoni sp. nov.-and a key to all Brazilian species. Including our results, Pseudogaurax is known from 19 species from Brazil, 10 of which occur in the Amazon Forest.