Fish, tributaries of middle Rio Mogi Guaçu, upper Rio Paraná basin, São Paulo state, Southeastern Brazil

In this paper we compiled a fish list obtained from field collections performed between 1999 and 2005 in four tributaries of the Rio Mogi Guacu, upper Rio Parana basin, Sao Paulo State, Brazil. The collected fishes belong to six orders, 21 families, 60 genera and 82 species. The number of species represents 20 to 30% of the fish richness for the entire upper Rio Parana basin according to recent estimates. A comparison to earlier published fish lists of the Rio Mogi Guacu basin, chiefly from its main river channel, is also presented.