New and little-known Pliocardiinae (Bivalvia, Vesicomyidae) from the continental slope off Mauritania

This study reports four vesicomyid species of the bathyal zone collected in sediment samples off the Mauritanian continental slope. One species is described as new: Isor­ropodon arguinensis spec. nov. Three bathyal species Wai­siuconcha haeckeli, Isorropodon curtum, Callogonia mauri­tanica are already known from Mauritania and all four are most likely endemic to the continental slope of Mauritania.