MOLUSCOS BIVALVES LÍMNICOS DE UM TRECHO DO RIO ARAGUAIA, ENTRE O ESTADO DO PARÁ E O ESTADO DO TOCANTINS, BRASIL

The Araguaia River is an important Brazilian watercourse that covers several states of the country and has a large extension. It is characterized by a vast aquatic biodiversity, with a variety of habitats that are home to diverse terrestrial and aquatic species. However, the environment faces environmental challenges such as shore degradation, mining, dam construction and overfishing. This study aimed to identify the freshwater bivalves of the Araguaia River, based on specimens deposited in the zoological collection of the Biology Laboratory of the SESI School of Araguaína, State of Tocantins. And so, the results obtained revealed the presence of 13 species of freshwater bivalves, distributed in three families. Such results were possible from the collection of 1071 valves, corresponding to approximately 530 animals. Among the species found, Eupera simoni, Anodontites trapesialis, Lamproscapha ensiformis and Leila esula stand out. However, some valves could not be identified to the specific level due to conservation conditions or lack of pertinent literature.