Redescription and Geographical Distribution of the Endangered Fish Ossubtus xinguense Jégu 1992 (Characiformes, Serrasalmidae) with Comments on Conservation of the Rheophilic Fauna of the Xingu River.
The monotypic species Ossubtus xinguense was originally described based on scarce material putatively divided into juveniles and adults. Ossubtus xinguense has a restricted distribution and was previously known only from a few rapids downstream of the city of Altamira, in the Volta Grande stretch of the Middle Xingu River. Until recently, the species was rare in museums because its habitat (large rapids) is difficult to sample. Large-scale collecting efforts targeting rapids throughout the Xingu River basin have yielded an abundance of new material. Based on an analysis of the type series and freshly preserved specimens, we redescribe O. xinguense and provide detailed osteological descriptions along with comments about its relationships within Serrasalmidae. Furthermore, we expand the geographical distribution of the species and discuss its conservation status.
Universidade Federal do Pará, Cidade Universitária Professor José Silveira Netto, Instituto de Ciências Biológicas, Programa de Pós-Graduação em Ecologia Aquática e Pesca, Laboratório de Biologia Pesqueira e Manejo dos Recursos Aquáticos, Belém, PA, Brazil.
Marcelo C
MC
Andrade
Universidade Federal do Pará, Campus Universitário de Altamira, Faculdade de Ciências Biológicas, Laboratório de Ictiologia, Altamira, PA, Brazil.
Leandro M
LM
Sousa
Instituto Nacional de Pesquisas da Amazônia, Programa de Pós-Graduação em Biologia de Água Doce e Pesca Interior, Manaus, AM, Brazil.
Rafaela P
RP
Ota
Institut de Recherche Pour le Développement, Biologie des Organismes et Ecosystèmes Aquatiques, Laboratoire d'Icthyologie, Muséum national d'Histoire naturelle, Paris, France.
Michel
M
Jégu
Universidade Federal do Pará, Cidade Universitária Professor José Silveira Netto, Instituto de Ciências Biológicas, Programa de Pós-Graduação em Ecologia Aquática e Pesca, Laboratório de Biologia Pesqueira e Manejo dos Recursos Aquáticos, Belém, PA, Brazil.|Universidade Federal do Pará, Campus Universitário de Altamira, Faculdade de Ciências Biológicas, Laboratório de Ictiologia, Altamira, PA, Brazil.
Tommaso
T
Giarrizzo
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