Abstract
The geographic distribution of a small rare fish in the family Characidae (subfamily Stevardiinae) Rhinopetitia potamorhachia Netto-Ferreira; Birindelli; Sousa & Menezes 2014, which was only known for its type locality in Rio Teles Pires (limits of Para and Mato Grosso States), an area significantly affected by the construction of one hydroelectric plant. Currently the specie was found with endangered status according to the Brazil Red Book of Threatened Species of Fauna. Its distribution was extended to the middle Rio Tapajos, inside the National Forest of Amana (FLONA of Amana) and in the limits of the National Park of the Amazon, in the Municipality of Itaituba-Para. This new record is more than 700 km apart from the previously registered location, in riverway distance, which provides relief for the endangered species. In addition to the new distribution record, brief information on feeding and reproduction of the species were provided. Keywords: Characiformes; Rhinobrycon ; distribution; anthropogenic impact; Amazon Eastern.
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