Loripes aberrans (P. Dautzenberg, 1910)
Meganodontia acetabulum P. Bouchet & R. von Cosel,2004
Cardiolucina actinus (FOSSIL) W.H. Dall, 1903 †
Lucinoma acutilineata (FOSSIL) (T.A. Conrad, 1849 †)
Notomyrtea ada (A. Adams & G.F. Angas,1863)
Myrtina adamsiana (T. Habe, 1958)
Lucina adansoni (A.V.M.D. D'Orbigny,1840)
Eophysema adegokei (FOSSIL) Freneix 1979 †
Callucina adelaideana (B.C. Cotton& F.C. Godfrey, 1938)
Myrtea aequalis (K.H.J. Thiele& S.G.A. Jaeckel, 1931)
Tinalucina aequatorialis R. von Cosel, 2006
Lucinoma aequizonata (R.E.C. Stearns, 1890)
Lucina affinis (FOSSIL) R. Tate, 1887 †
Cardiolucina agassizi (FOSSIL) (O.G. Michelotti, 1839 †)
Miltha agilis (FOSSIL) Finlay & J. Marwick,1937 †
Taylorina alata R. von Cosel & P. Bouchet,2008
Anodontia alba J.H.F. Link, 1807
Callucinella albella (FOSSIL) (J.B.P.A. Lamarck,1806 †)
Eomiltha alburgensis (FOSSIL) (Vincent 1930) †
Alucinoma alis R. von Cosel & P. Bouchet,2008
Gonimyrtea alta (FOSSIL) J. Marwick, 1965 †
Pleurolucina amabilis (FOSSIL) (W.H. Dall, 1898 †)
Miltha amakusensis (FOSSIL) Tashiro, 1976 †
Sphaera americanus (FOSSIL) Imlay, 1940 †
Radiolucina amianta (W.H. Dall, 1901)
Lucina amor (FOSSIL) (A.V.M.D. D'Orbigny,1850 †)
Myrtea amorpha (R. Sturany, 1896)
Lucina anceps (FOSSIL) Laube, 1865 †
Phacoides andersoni (FOSSIL) A.A. Olsson, 1930 †
Lucinoma anemiophila A.M. Holmes, P.G. Oliver& J. Sellanes, 2005
Pillucina angela (J.C. Melvill, 1899)
Lucina anglica (FOSSIL) (Rollier) †
Myrtea angularis (FOSSIL) Tashiro, 1976 †
Divaricella angulifera von Martens, 1880
Lucinoma annulatum (L.A. Reeve, 1850)