Limnoperna huttoni (FOSSIL) (H.H. Suter, 1914 †)
Septifer huttoni (FOSSIL) (A.E.M. Cossmann, 1916 †)
Dacrydium hyalinum (T.A. de M. Monterosato,1875)
Lycettia hyptertrigona (FOSSIL) (Damborinea, 1987 †)
Promytilus illinoisensis (FOSSIL) (A.H. Worthen, 1884 †)
Modiolus imbricatus (FOSSIL) Sowerby, 1818 †
Musculus impactus (J. Hermann, 1782)
Musculus imus (P. Bartsch, 1915)
Perna incavata (FOSSIL) A.E.M. Cossmann, 1904 †
Lithophaga inclusa (FOSSIL) B. Phillips, 1829 †
Xenostrobus inconstans (R.W. Dunker, 1856)
Crenomytilus incurva (FOSSIL) (T.A. Conrad, 1839 †)
Idas indicus Kuriakose & H.B. Nair,1976
Mytella inezensis (FOSSIL) (Conrad 1857) †
Arcoperna inflata (FOSSIL) W.H. Dall, 1916 †
Vulcanidas insolatus R. von Cosel& B.A. Marshall, 2010
Samiolus iohannesbaptistae (FOSSIL) S. Kiel & M. Taviani,2017 †
Modiolus ionensis (FOSSIL) L.C. Glenn, 1904 †
Amygdalum ishidoense (FOSSIL) (Yabe & Nagao 1926) †
Crenomytilus ivantischini (FOSSIL) L. Krishtofovich, 1969 †
Adipicola iwaotakii (T. Habe, 1958)
Idas jaclinae F.L. Giusti, P. Mietto& C. Sbrana, 2012
Arcuatula japonica (R.W. Dunker, 1857)
Arvella japonica (W.H. Dall, 1897)
Bathymodiolus japonicus J. Hashimoto & T.A. Okutani,1994
Idas japonicus (T. Habe, 1976)
Modiolus jaworskii (FOSSIL) J. Wanner & Knipscheer,1951 †
Modiolus jenkinsoni (FOSSIL) (McCoy) †
Mytilus jurensis (FOSSIL) M.S. Merian, 1836 †
Brachidontes kamtschaticus (FOSSIL) V.N. Sinelnikova, 1984 †
Crenella kannoi (FOSSIL) Marincovich Jr., 1993 †
Plicatomytilus kavranensis (FOSSIL) (V.N. Sinelnikova,1990 †)
Septifer keenae S. Nomura, 1936
Adula kleemanni M. Huber, 2010
Botula kleemanni P.H. Valentich-Scott,2008