Taxonomic studies on the Emarginulinae (Mollusca: Gastropoda: Fissurellidae) of southern Africa and Mozambique. Emarginula, Emarginella, Puncturella, Fissurisepta and Rimula

Abstract

Nineteen species (six new) of the genera Emarginula, Emarginella, Puncturella, Fissurisepta and Rimula are discussed; the last two genera represent new records for the area. Scanning electron micrographs of shell microsculpture, radula and protoconch are given where possible; microsculpture appears to be a particularly useful taxonomie character. New species: Emarginula phrygium, E.vindicaria, Puncturella voraginosa, P. serraticosta, Fissurisepta onychoides and Rimula rhips. New synonyms: Emarginula vadum Barnard, 1963 = E. undulata Melvill & Standen, 1903; Fissurisepta joschristiaensi Drivas & Jay, 1985 = Puncturella christiaensi Kilburn, 1978. Revised combination: oppressa Barnard, 1963, is an Emarginula, not an Emarginella. New record: Puncturella aethiopicavon Martens, 1902, described from the Zanzibar Channel, occurs off Natal and Transkei. Lectotypes designated and figured: Emarginula undulata Melvill & Standen, 1903, and Emarginella sibogae (Schepman, 1908).