Abstract
The caridean family Atyidae is currently known by 29 species in Madagascar, which are found throughout riverine habi-tats, caves and swamps. The present study describes a new genus and species from a mountain stream in the RanomafanaNational Park, South East Madagascar. The new genus is characterised by possessing a short unarmed rostrum, absenceof teeth on the carapace, the carpus of the second pereiopod being elongated with an anterior excavation, all pereiopodswith exopods (fifth vestigial or reduced), the presence of a single uropodal diaeresis spine, a long appendix masculinaarmed with numerous spiniform setae on the second male pleopod and in carrying 11–14 eggs of 1.4–1.5 × 1.00–1.1mm in size.References
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