The freshwater and terrestrial decapod crustacea of Pulau Tioman, Peninsular Malaysia

The freshwater and terrestrial decapod fauna of Pulau Tioman, an island off the east coast of Peninsular Malaysia, is documented and discussed. A tota l of 12 crab (in four families: Gecarcinidae, Grapsidae, Parathelphusidae a nd Potamidae) and 13 prawn species (in two families: Atyidae and Palaemonid ae) are covered. Two species of crabs, Cardisoma carnifex (Gecarcinidae), P seudosesarma bocourti (Grapsidae), and seven species of prawns, Caridina ce lebensis, C. aff. brachydactyla (Atyidae), Macrobrachium idae, M. scabricul um, M. dolichodactylus and M. meridionalis (Palaemonidae), constitute new r ecords for Pulau Tioman. Caridina celebensis, C. aff. brachydactyla, Macrob rachium scabriculum, M. dolichodactylus and M. meridionalis are also new re cords for Peninsular Malaysia.