New species of Trochidae (Mollusca, Gastropoda) from the Cape Verde archipelago

Few species of trochids have been found in the Cape Verde Archipelago. Two of them (Osilinus atratus and Gibbula senegalensis) are wide-spread along the West African coast, as well as being common in shallow waters of this Archipelago. Another (Gibbula corallioides) is a circalittoral species that appears to be endemic to the Cape Verde islands. In addition, four species (three of the genus Gibbula and one of Jujubinus) are considered undescribed and the present work is focused on their description. Two of these species are common in shallow waters of most islands. Two reddish forms of Jujubinus from deeper water are also found, but they remain undescribed, due the scarcity of material studied.