This paper contributes to the knowledge of the species richness and distribution of decapod crustaceans at the Ribeira de Iguape river basin, south of São Paulo State, Brazil. Seven protected areas (E.E. Juréia-Itatins, P.E. Ilha do Cardoso, P.E. Jacupiranga, P.E. Campina do Encantado, P.E. Carlos Botelho, P.E. Intervales and PETAR) were investigated, covering most of the Mata Atlântica remaining in the Ribeira de Iguape basin. Samples were taken during each season of the years 2000 and 2001 using two sampling methods (sieves and traps). Six species of palaemonid shrimps, three atyid shrimps, five aeglid anomuran crabs, and three trichodactylid and one grapsid crabs were collected.
Distribution; field survey; richness; taxonomy
