Jupiteria leachi (FOSSIL) J. Marwick, 1931 †
Ledella legionaria Viegas, N.P. Benaim& R.S. Absalão, 2014
Nuculana leonina W.H. Dall, 1896
Ledella leptorhyncha (FOSSIL) (R. Tate, 1886 †)
Nuculana liciata (FOSSIL) T.A. Conrad, 1843 †
Nuculana lincolnensis (FOSSIL) C.S. Weaver, 1916 †
Ledella lingulifer (R.N. Kilburn, 1994)
Litorhadia lisbonensis (FOSSIL) (T.H. Aldrich, 1895 †)
Portlandella lischkei (FOSSIL) (W.D. Smith, 1885 †)
Jupiteria lobula (W.H. Dall, 1908)
Propeleda longicaudata (K.H.J. Thiele, 1912)
Comitileda longirostrata (FOSSIL) (P.A. Maxwell, 1969 †)
Propeleda louiseae (A.H. Clarke, 1961)
Adrana ludmillae (E.J. Petuch, 1987)
Polidevcia lunulata (FOSSIL) Dembskaya, 1972 †
Phestia lusabaensis (FOSSIL) Dickins, 1999 †
Ledella lusitanensis J.A. Allen & G. Hannah,1989
Polidevcia lyonsensis (FOSSIL) Dickins, 1956 †
Nuculana mabillei (P. Dautzenberg& H. Fischer, 1897)
Ezonuculana mactraeformis (FOSSIL) (T. Nagao, 1932 †)
Nuculana magna (FOSSIL) †
Polidevcia magna (FOSSIL) A.M. Popov, 1957 †
Saccella mahmoudi (FOSSIL) Collignon 1981 †
Jupiteria mainensis (FOSSIL) Devjatilova, 1981 †
Nuculana majamraphensis (FOSSIL) Khomenko, 1934 †
Nuculana majanatschensis (FOSSIL) Ilyina, 1963 †
Ledella manati Viegas, N.P. Benaim& R.S. Absalão, 2014
Nuculana manawatawhia A.W.B. Powell, 1937
Nuculana marella (L.G. Hertlein, G.D. Hanna& A.M. Strong, 1940)
Nuculana mariae (FOSSIL) d'Orbigny, 1844 †
Ledella marisnostri R. La Perna, 2004
Jupiteria marwicki (FOSSIL) (P.A. Maxwell, 1969 †)
Litorhadia mater (FOSSIL) (Meyer, 1885 †)
Nuculana mauritiana (G.B. I Sowerby, 1833)
Saccella maxwelli A.G. Beu, 2006