Portal de Periódicos da CAPES

Artigo Produção Nacional Revisado por pares

BIBTEX RIS

Morphological assessment of Rheodreissena (Bivalvia: Veneroida: Dreissenidae) with an updated diagnosis of the genus, descriptions of two new species, redescription of R. lopesi, and the first account of larval brooding in New World dreissenids

2019; Academy of Natural Sciences of Drexel University; Volume: 166; Issue: 1 Linguagem: Inglês

10.1635/053.166.0112

1938-5293

Maria Cristina Dreher Mansur, Daniel Pereira, Paulo Eduardo Aydos Bergonci, Daniel Mansur Pimpão, José Ricardo de Souza Barradas, Mark H. Sabaj,

Fish biology, ecology, and behavior

RheodreissenaGeda et al. 2018, a recently described genus of Dreissenidae, is represented by living species that inhabit inland freshwaters of Brazil and Venezuela. The type species of Rheodreissena is R. hoeblichi (Schütt 1991a) described from the lower Orinoco basin, Venezuela. Three species are added in this study: R. lopesi (Alvarenga & Ricci, 1989) from the Tocantins and Xingu basins; R. cordilineata n. sp. from the Madeira, Trombetas and Xingu basins, and R. xinguana n. sp. from the Tapajós and Xingu basins. Those three species are recorded from Volta Grande, the stretch of the Xingu River impacted by the Belo Monte dam complex. All Rheodreissena typically attach in shallow clusters to clean, rocky substrates associated with rapids in the main channels of large clear water rivers. Species of Rheodreissena are distinguished by aspects of shell morphology and soft anatomy that presumably reflect adaptations to a rheophilic lifestyle.