Deep-sea prosobranch molluscs in Northwest Africa
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The aim of this work is the study of the prosobranch molluscs collected during the 11 research surveys carried out in Northwest Africa onboard R/V Dr. Fridtjof Nansen and R/V Vizconde de Eza between 2002 and 2012, within the framework of the EcoAfrik and the FAO EAF-Nansen projects. The working area extended from Cape Spartel (Gibraltar Strait) to Guinean coasts, and includes 1350 trawling stations deployed between 100 and 1748 m depth. The samples were collected using mainly a commercial otter trawl and a beam-trawl in soft bottoms; a rock dredge was also employed for the study of hard bottoms located along the Mauritanian slope. Prosobranchs were collected in 483 stations, representing 36% of the sampled stations. Preliminary identifications reported about 120 species belonging to 29 different families; Muricidae, Naticidae and Nassariidae showed the highest specific richness within the families. The most frequent species were Xenophora crispa in Morocco, Charonia lampas in Western ...
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