Abstract
The Bombyliidae constitutes one of the largest family of Diptera, with approximately 4500 species known worldwide. Additionally, this is the group of flies with the largest representativeness in desertic regions of the Earth. The adults are nectar feeders, which make then the major pollinators of many flowering plants. Immatures are poorly known as a whole. Currently the Bombyliidae are divided into 16 subfamilies and 18 tribes. The subfamily Phthiriinae comprises ten genera, divided into two tribes: Phthiriini Becker, 1913, encompasses six genera: Acreotrichus Macquart, 1850, Australiphthiria Evenhuis, 1986, Pygocona Hull, 1973, Acreophthiria Evenhuis, 1986, Neacreotrichus Cockerell, 1917 and Phthiria Meigen, 1820, and Poecilognathini Evenhuis, 1986 encompasses four genera: Euryphthiria Evenhuis, 1986, Relictiphthiria Evenhuis, 1986, Poecilognathus Jaennicke, 1867 e Tmemophlebia Evenhuis, 1986. The two tribes have a total of 115 species described worldwide and are present in all biogeographic regions of the Earth. This project has the main goal to contribute for comprehension of the evolutionary pattern in Bombyliidae, performing a phylogenetic analysis of Phthiriinae based on morphological characters. Specifically, this research aims to realize a comparative study of external morphology of Phthiriinae, test the monophyly of the subfamily, tribes and included genera, propose a new classification for the subfamily and also delimit the species with sexual dimorphism based on molecular and morphological features. The reconstruction of evolutionary relationships of the subfamily may provide an understanding of innumerous evolutionary characters with biological relevance, which will provide solid base for future studies about diversity, biogeographic and conservation of Bombyliidae. (AU)
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