Abstract
This study present an inventory of the genera of Odonata-Anisoptera in lotic environments of the Iguatemi River basin, upper Paraná River, Mato Grosso do Sul State, Brazil. Samplings were performed from December 2006 to February 2009 in the Iguatemi River and eight streams of the basin. We collected 739 immature Odonata, distributed in 25 genera and three families; of which one genus represent a new record for the Mato Grosso do Sul State. Progomphus, Tramea, Elasmotemis, Macrothemis, Aphyla and Phylocycla were the most representative genera in the Iguatemi River basin. The genus accumulation curve predicts an increase of new genera for the Iguatemi River basin.
Highlights
Insects are an important component of invertebrate assemblages in almost all water bodies, and often numerically dominant (Rincon & Cressa, 2000, Graça et al, 2004)
Considering that knowledge of the basic characteristics of biological assemblages is the first step for the development of effective conservation policies (Súarez et al, 2011), this study present an inventory of the genera of immature OdonateAnisoptera found in lotic environment of the Iguatemi River basin, upper Paraná River, Mato Grosso do Sul State, Brazil
The 739 immature Odonata collected were distributed in 25 genera and three families, being that genus Desmogomphus is a new record for the Mato Grosso do Sul State
Summary
Insects are an important component of invertebrate assemblages in almost all water bodies, and often numerically dominant (Rincon & Cressa, 2000, Graça et al, 2004). Immatures are widely distributed in the aquatic environment; have graybrown coloring and primarily benthic mode of life (Corbet, 1980, Remsburg & Turner, 2009) These organisms are important biological components structuring freshwater ecosystems, with a key role in the food chain because they are predators at all stages of their life cycle (Corbet, 1999, Carchini, Della-Bella, Solimini, & Bazzanti, 2007) and are food sources for fish, amphibians and reptiles (Souza & Costa, 2006). Considering that knowledge of the basic characteristics of biological assemblages is the first step for the development of effective conservation policies (Súarez et al, 2011), this study present an inventory of the genera of immature OdonateAnisoptera found in lotic environment of the Iguatemi River basin, upper Paraná River, Mato Grosso do Sul State, Brazil This survey should serve as a reference for the region, partially supplying a biogeographic gap in the knowledge of the Odonata fauna of this basin
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