Fauna de diptera em um fragmento de terra firme em Manaus - Amazonas

Abstract

The Amazon is among remarked brazilian domains because it is a tropical forest with highest biological diversity, but many antropic actions are being observed on it as the build of great urban areas, wood exploitation, deforestation, and burning among other human activities. The occupied areas by human activities expanded so far in last century that nowadays what is observed in many places of the planet are small spots of occupied areas in natural ecossystems surrounded by human dominated areas known as forest fragments. The insects are considered very important as subjects in studies of forest fragmentation because they have high population densities and species diversity, but the ecological and taxonomical knowledgement of several of the main groups of the Class Insecta as Diptera is restricted. Thus, a study of the fauna of Diptera was executed with emphasis on the suborder Brachycera in a forest fragment of the “1º Batalhão de Infantaria de Selva”. The collections were done using two Malaise traps and two hanging fly traps in September and October 2017, and February and March 2018, one week in each month. After collections all the material was identified to family taxonomic level and then families were analized in abundance, number of individuals. During dry and wet seasons were captured 1379 dipterans of the suborder Brachycera of the following 28 families: Agromyzidae (1), Calliphoridae (2), Chloropidae (14), Clusiidae (5), Drosophilidae (138), Dolichopodidae (203), Ephydridae (25), Hybotidae (10), Lauxaniidae (32), Lonchaeidae (5), Micropezidae (27), Milichiidae (39), Muscidae (20), Neriidae (3), Periscelididae (10), Phoridae (463), Richardiidae (9), Ropalomeridae (4), Sarcophagidae (45), Sepsidae (8), Syrphidae (11), Sphaeroceridae (175), Stratiomyidae (64), Tabanidae (12), Tachinidae (25), Tephritidae (4), Ulidiidae (26), Xylomyidae (3). A new record of Xanthacrona tuberosa Cresson, 1908 of Ulidiidae was found to Brazil, and also a new record of the specimens of Xylomyidae to the Amazonas State. These new occurrences point out the importance of the existence of conservation unities in Amazonia, as furthering the need of researches on this entomofauna with the goal of knowning the species diversity of this bioma.