The state of the art in planktonic rotifers biodiversity from some freshwater ecosystems was elaborated for the state of Pernambuco (Brazil). A bibliographic survey was done and most studies focused seasonal aspects and trophic state of the ecosystems. At least 19 continental aquatic environments related to rotifer researches have been studied. The Sertão area was the most studied. The present survey registered 64 species of planktonic rotifers, distributed in 18 families and 29 genera. The most frequent species were Keratella tropica and Brachionus falcatus, showing that most studies were done in the limnetic zone. The results showed the need for more research on the biodiversity of this group in ecosystems located in Zona da Mata and Agreste areas, as well as in lotic systems and in the littoral zones, in view of the lack of information.
Rotifera; check-list; limnic ecosystems; Pernambuco; northeast Brazil
