Decapoda: Potamoidea) from northern Madagascar

摘要

Foza raimundi, a new genus and species of freshwater crab from Antsiranana Province, northern Madagascar, is described from a high-altitude locality in the isolated Marojejy mountain range. The unusual combination of characters of the new species warrants the establishment of a new genus to accommodate this taxon. The new taxon is compared to the other species of freshwater crabs occurring in Madagascar. The Malagasy freshwater crabs belong to the Potamonautidae, a family found exclusively in the Afrotropical zoogeographic region. The new taxon is endemic to Madagascar, as are the other six genera and 12 species of freshwater crabs found there.