Cyclocardia kurilensis (FOSSIL) Savizky, 1981 †
Cyclocardia kurilensis (FOSSIL) Savisky, 1981 †
Cardita kyushuensis (T.A. Okutani, 1963)
Venericor labreansis (FOSSIL) (A.A. Olsson, 1929 †)
Xenocardita lacunaris (FOSSIL) (Hamlin 1884) †
Cardiocardita lacunosa (L.A. Reeve, 1843)
Megacardita laeviplana (FOSSIL) (Depéret, 1839 †)
Megacardita laticosta (FOSSIL) (K.E.I. von Eichwald,1830 †)
Cardites laticostatus (G.B. I Sowerby, 1833)
Glans latissima (FOSSIL) R. Tate, 1886 †
Pleuromeris latiuscula A.W.B. Powell, 1937
Venericardia laurae (FOSSIL) A. Brongniart, 1823 †
Venericardia laurae neglecta (FOSSIL) O.G. Michelotti †
Ainicardita laxata (FOSSIL) (M. Yokoyama, 1924 †)
Cardita leana R.W. Dunker, 1860
Purpurocardia lillei (FOSSIL) (Fleming, 1943 †)
Purpurocardia lilliei (FOSSIL) (C.A. Fleming, 1943 †)
Cardita loxomorpha (FOSSIL) A.E.M. Cossmann & G. Pissarro †,
Cyclocardia lutosa (FOSSIL) L.S. Zhidkova& Krishtofovich, 1984 †
Paraglans lydiae (FOSSIL) J.M. Pacaud & D. Merle,2016 †
Cyclocardia magica (FOSSIL) (Devjatilova, 1981 †)
Cyclocardia magna (FOSSIL) Quilty & al., 2016 †
Ainicardita majanatschensis (FOSSIL) (Ilyina, 1963 †)
Venericardia mandaica (FOSSIL) M. Yokoyama, 1911 †
Cardita manteia (FOSSIL) C.J. Maury, 1924 †
Cyclocardia marama (FOSSIL) (P.A. Maxwell, 1969 †)
Strophocardia markini (FOSSIL) (Ilyina, 1963 †)
Pleuromeris marshalli (J. Marwick, 1924)
Carditellopsis martyni P.G. Oliver& H.C.G. Chesney, 1997
Cardita marwicki (FOSSIL) C.R. Laws, 1944 †
Venericardia matheroni (FOSSIL) (C. Mayer, 1871 †)
Carditamera matima (FOSSIL) A.A. Olsson, 1922 †
Megacardita matschigarica (FOSSIL) (Khomenko, 1938 †)
Venericardia maudensis (FOSSIL) G.B. Pritchard, 1895 †
Venericor mediaplata (FOSSIL) (Gardner & E. Bowles,1939 †)