Freshwater shrimp generaCaridinaandParisia(Decapoda: Caridea: Atyidae) of Madagascar, with descriptions of four new species

Summary Three new species of Caridina and one new species of Parisia from caves in northern Madagascar are described and figured. A useful key-character, the presence or absence of an apical hook on the dactylus and propodus of pereiopods 1 and/or 2, is re-evaluated. Revised keys are provided for both genera.