A new genus, Micropotamia, is erected for Phaonia minuscula Albuquerque, 1955 [type-species of the genus], Phaonia cilitibia Albuquerque, 1955 and Azelia amazonica Albuquerque & Lopes, 1982. A key to these three species is given. The female of Micropotamia amazonica is described for the first time, from Roraima. Some character-states of phylogenetic importance and affinities with world Azeliini genera are discussed. Megophyra Emden, 1965 and Potamia Robineau-Desvoidy, 1830 are considered to be most closely related to Micropotamia, gen.n.
Muscidae; Azeliini; phylogenetic relationships