Estudo taxonômico e filogenético de Porphyrochroa Melander, 1928 (Diptera, Empididae) da Amazônia brasileira

Abstract

The Empididae is a family in the order Diptera and it includes more than 4 thousand described species around the world and probably this number will exceed 7,5 thousand species, being one of the largest Diptera ́s family. It is divided in three subfamilies: Hemerodromiinae, Empidinae and Clinocerinae. Porphyrochroa Melander, 1928 is one of the 29 Empidinae ́s genera. Currently it has 35 species, 14 in Brazil, 6 in Peru, 5 in Bolivia, 5 in Dominican Republic, 3 in Mexico, 1 in Guyana and 1 in Panama. Only three species from Brazilian Amazonic Region were known until now. In order to increase the taxonomic and geographical distribution knowledge of the Porphyrochroa ́s Amazonian species, it was about 500 specimens from Acre, Amazonas and Roraima were studied based on external morphology and genitalia, all them deposited at INPA Entomological Collection. The abdomen of the male specimens was and the terminalia was macerated in hot lactic acid 85% during variable time, depending on the abdominal sclerotinization degree. After maceration, the peaces were transferred to excavated slides with glycerin and the genitalic pieces were illustrated. A phylogenetic study with the 17 Amazonian new species, described here and more 8 species already described from other regions, was made and resulted in differentent biogeografic groups of species.