Arca nannodes (FOSSIL) K. Martin, 1885 †
Anadara natalensis (C.F.F. von Krauss, 1848)
Barbatia nattheimensis (FOSSIL) Wellnhofer, 1964 †
Acar naturezae J. de A. Francisco, J.C.N. Barros& S.F.B. de Lima, 2012
Arca navicularis J.G. Bruguière, 1789
Arca negata (FOSSIL) B.C. Cotton, 1947 †
Arca newtoni (FOSSIL) E.W. Vredenburg, 1928 †
Anadara ninohensis (FOSSIL) (Y. Otuka, 1934 †)
Bathyarca nipponica T.A. Okutani, 1962
Arca nitida G.B. Brocchi, 1814
Barbatia nivea (P.F. Röding, 1798)
Arca noae C. Linnaeus, 1758
Tegillarca nodifera (Martens, 1860)
Asperarca nodulosa (FOSSIL) (Muller 1776) †
Asperarca nodulosa (O.F. Müller, 1776)
Anadara notabilis (P.F. Röding, 1798)
Anadara notoflorida (FOSSIL) E.H. Vokes, 1969 †
Barbatia novaezealandiae (E.A. Smith, 1915)
Bathyarca nucleator (W.H. Dall, 1908)
Arca nuda (FOSSIL) Münster, 1841 †
Anadara nugax T. Iredale, 1939
Calloarca nuttingi (W.H. Dall, P. Bartsch& H.A. Rehder, 1938)
Anadara nux (G.B. I Sowerby, 1833)
Barbatia oahua W.H. Dall, P. Bartsch& H.A. Rehder, 1938
Arca obeidi (FOSSIL) Abbass, 1972 †
Anadara obesa (Sowerby, 1833)
Barbatia obliquaria (FOSSIL) (G.P. Deshayes, 1829 †)
Barbatia obliquata (W. Wood, 1828)
Anadara obliquidens (FOSSIL) Boettger, 1883 †
Anadara occlusa (L.A. Reeve, 1844)
Anadara oceanica (R.P. Lesson, 1831)
Arca ocellata L.A. Reeve, 1844
Anadara ogawai (FOSSIL) J. Makiyama, 1943 †
Acar oliveirae J. de A. Francisco, J.C.N. Barros& S.F.B. de Lima, 2012
Acar olivercoseli M. Huber, 2010