Ianacus, Genus – synonym of Crepidula, Genus
Idalia, Genus – synonym of Okenia, Genus
Idalina, Genus – synonym of Okenia, Genus
Idasola, Genus – synonym of Idas, Genus
Idulia, Genus – synonym of Doto, Genus
Indacar, Genus – synonym of Bathyarca, Genus
Inobittium, Genus – synonym of Bittium, Genus
Ividella, Genus – synonym of Chrysallida, Genus
Ixartia, Genus – synonym of Thracia, Genus