Gastropod fauna of the Cameroonian coasts

 Eighteen species of gastropods were encountered living near and within the large coastal swamps, mangrove forests, intertidal flats and the rocky shore of the Cameroonian coast of the Atlantic Ocean. These represent members of the subclasses Neritimorpha, Caenogastropoda, and Heterostropha. Within the Neritimorpha, representatives of the genera Nerita, Neritina, and Neritilia could be distinguished by their radula anatomy and ecology. Within the Caenogastropoda, representatives of the families Potamididae with Tympano-tonos and Planaxidae with Angiola are characterized by their early ontogeny and ecology. The Pachymelaniidae are recognized as an independent group and are introduced as a new family within the Cerithioidea. Littorinimorpha with Littorina, Assiminea and Potamopyrgus as well as Neogastropoda (Thais) and Heterostropha (Melampus and Onchidium) are described and compared with representatives of the Caribbean and Indo-Pacific province. Received: 15 January 1999 / Accepted: 26 July 1999