New Amydrostylus Lamas, Falaschi & Evenhuis (Diptera, Mythicomyiidae, Psiloderoidinae) from the Brazilian semiarid region, with discussion on the unusual male terminalia of the genus.

The studying material were recently collected with Malaise traps in Northeastern Brazil, and the authors found a new species of Amydrostylus, which represents the second known species of this endemic genus from the open/dry biomes of Brazil. The discovery results will provide more new diagnosis for the genus and allow a better knowledge of the male terminalia morphology, leading to a new interpretation of some of its structures. Male and female specimens are described and illustrated here.