The subfamily Rissoininae (Mollusca: Gastropoda: Rissoidae) in the Cape Verde Archipelago (West Africa)

The subfamily Rissoininae (Gastropoda, Rissoidae) is studied in the Cape Verde Archipelago. Twenty-nine species belonging to three genera have been found: Rissoina (Rissoina) punctostriata (Talavera, 1975), a species with planktotrophic development widely distributed along West Africa, and currently confused with the also planktotrophic Caribbean species Rissoina (Rissoina) decussata (Montagu, 1803); one new species of Rissoina (Ailinzebina); 26 new species of Schwartziella (Schwartziella), and one new species of Zebina (Zebina). The paucispiral protoconch of all the new species indicates a non-planktotrophic development and strongly suggest all them are endemic of the Cape Verde Archipelago. The new species are compared among them and with other related West African species. The high level of endemism, the geographical distribution of all the species in the Archipelago and the possible relationships of the Cape Verde Rissoininae are also commented