Nucula headonensis (FOSSIL) Morris †
Lissanucula hilli (FOSSIL) (W.P. Woodring, 1925 †)
Truncacila hokkaidoensis (FOSSIL) T. Nagao, 1932 †
Leionucula hunickeni (FOSSIL) Zinsmeister & Macellari,1988 †
Nuculopsis imperta (FOSSIL) C.O. Waterhouse, 1964 †
Nucula impressa (FOSSIL) J. de C. Sowerby †
Nucula inconspicua H. Adams, 1871
Nucula inflata (FOSSIL) Wissmann, 1841 †
Nucula infrequens (P.A. Maxwell, 1992)
Nucula infrquens (FOSSIL) Maxwell 1992 †
Acila insignis (A.A. Gould, 1861)
Nucula insignis (I. Hayami & T. Kase,1993)
Nucula insolita (FOSSIL) Pronina, 1969 †
Nucula interflucta L.N. Marincovich, 1973
Nucula iphigenia (W.H. Dall, 1896)
Nuculoma iridescens T. Habe & K. Sakurai,1965
Nucula irregularis G.B. III Sowerby, 1904
Acila isthmica (FOSSIL) J. Brown & H.A. Pilsbry,1911 †
Nucula izushotoensis (T.A. Okutani, 1966)
Ennucula jaeckeli M. Huber, 2010
Lamellinucula jeffreysi (FOSSIL) (L.M.D. Bellardi, 1875 †)
Acila jucunda (K.H.J. Thiele& S.G.A. Jaeckel, 1931)
Nucula kalimnae (FOSSIL) F.A. Singleton, 1932 †
Nucula kanaka W. Bergmans, 1991
Nucula kerguelensis K.H.J. Thiele, 1912
Pronucula kermadecensis W.R.B. Oliver, 1915
Acila kholmskensis (FOSSIL) Krishtofovich, 1964 †
Acila kovatschensis (FOSSIL) Krishtofovich, 1947 †
Leionucula kovatschensis (FOSSIL) V.N. Sinelnikova, 1991 †
Leionucula kryshtofovichii (FOSSIL) V.N. Sinelnikova, 1990 †
Ennucula kuluvensis (FOSSIL) Krishtofovich, 1984 †
Leionucula laevigata (FOSSIL) (Sowerby, 1818 †)
Nucula lateralis (FOSSIL) Terquem & Jourdy, 1869 †
Ennucula layardii (C.B. Adams, 1856)
Nuculopsis leiyangensis (FOSSIL) H.X. Liu, 1976 †