Ten species of Hyriidae, ten of Mycetopodidae, three of Corbiculidae - two exotic: Corbicula largillierti (Philippi, 1844) and C. fluminea (Müller, 1774) -, three Sphaeriidae and one exotic Mytilidae, Limnoperna fortunei (Dunker, 1857), were taxonomically revised with diagnosis and identification key for the Sinos River Basin, State of Rio Grande do Sul, Brazil. Voucher specimens of several scientific collections were examined. The type locality of Anodontites iheringi (Clessin, 1882) is presently restricted to Paranhana River, Municipality of Igrejinha (29º36'S and 50º50'W). Species distribution according to the river zones (high, middle and low) is presented.
Freshwater mussels; Subtropical River; South Brazil; survey; taxonomy
