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Haminoea are bubble-shelled marine snails with an estimated 40 living species worldwide. This is the first attempt to incorporate all previously available and new data from shell structure, anatomy and molecular sequences in a systematic revision, phylogenetic and biogeographic analysis of the genus. The main objectives are to review and clarify the systematics of the worldwide species, and to produce a phylogeny of the family as a basis for hypotheses of speciation, diversity and biogeography.