Hyphantosoma intricatum (P. Dautzenberg, 1907)
Petricola inversa O. Macsotay & B. Campos,2001
Legumen iraniense (FOSSIL) Collignon 1981 †
Mysia irradiata (FOSSIL) A.E.M. Cossmann, 1887 †
Grateloupia irregularis (FOSSIL) (B. de Basterot, 1825 †)
Irus irus (C. Linnaeus, 1758)
Pitar irvajamensis (FOSSIL) Devjatilova, 1981 †
Placamen isabellina (R.A. Philippi, 1849)
Irus ishibashianus J.T. Kuroda & T. Habe,1952
Pelecyora islandicoides (FOSSIL) (J.B.P.A. Lamarck,1818 †)
Pelecyora isocardia (R.W. Dunker, 1845)
Globivenus isocardia (Verrill, 1870)
Callista italica (FOSSIL) (J.L.M. Defrance,1818 †)
Dosinia iwakawai K. Oyama & T. Habe, 1971
Bassina jacksonii (E.A. Smith, 1885)
Cyclinella jadisi A.A. Olsson, 1961
Loxo japonica (FOSSIL) (K. Amano, 1957 †)
Dosinia japonica (L.A. Reeve, 1850)
Petricola japonica R.W. Dunker, 1882
Marcia japonica (J.F. Gmelin, 1791)
Paphia japonica (FOSSIL) (Y. Ando, 1953 †)
Leukoma jedoensis (C.E. Lischke, 1874)
Periglypta jerdoni (FOSSIL) (Hislop, 1859 †)
Lamelliconcha joaquinensis (FOSSIL) (Vokes 1939) †
Leukoma jobanica (FOSSIL) (M. Yokoyama, 1924 †)
Dosinia johnstoni (FOSSIL) R. Tate, 1887 †
Pelecyora jousseaumiana (E. Fischer-Piette& D. Delmas, 1967)
Dorisca jucunda (E.A. Smith, 1885)
Callistina judaica (FOSSIL) (Blanckenhorn, 1934 †)
Pelecyora jukesbrowniana (H.B. Preston, 1915)
Pitar julianum (FOSSIL) H.F.A. von Ihering,1907 †
Dosinia juvenilis (J.F. Gmelin, 1791)
Dosinia kaawaensis (FOSSIL) J. Marwick, 1927 †
Eumarcia kaawaensis (FOSSIL) J. Marwick, 1927 †
Saxidomus kakertensis (FOSSIL) V.N. Sinelnikova, 1984 †