Pusillina kazakhstanica (FOSSIL) O.V. Amitrov, 2010 †
Alvania kenneyi (FOSSIL) H.S. Ladd, 1966 †
Onoba kerchensis (FOSSIL) Iljina, 1993 †
Onoba kergueleni (E.A. Smith, 1875)
Alvania kermadecensis (W.R.B. Oliver, 1915)
Onoba kermadecensis (A.W.B. Powell, 1927)
Onoba klausgrohi W. Engl, 2011
Cingula koeneni (FOSSIL) M. Glibert, 1952 †
Alvania kowiensis J.R. le B. Tomlin, 1931
Setia kuiperi (A. Verduin, 1984)
Onoba kurilensis A.N. Golikov& O.V. Kussakin, 1974
Rissoa kwandangensis (M.M. Schepman, 1909)
Onoba kyskensis (P. Bartsch, 1911)
Alvania lachesis (FOSSIL) (B. de Basterot, 1825 †)
Setia lacourti (A. Verduin, 1984)
Alvania lactanea (FOSSIL) M. Glibert, 1949 †
Alvania lactea (A. Michaud, 1830)
Onoba lactea (FOSSIL) (H.J. Finlay, 1926 †)
Onoba lacuniformis W.F. Ponder & H.W. Worsfold,1994
Merelina lacunosa (A.W.B. Powell, 1940)
Peringiella laevis (T.A. de M. Monterosato,1877)
Alvania lamellata P. Dautzenberg, 1889
Alvania lampra (W.H. Dall, 1927)
Alvania lanciae (P. Calcara, 1845)
Onoba lantzi (C. Vélain, 1877)
Manzonia lanzarottii R.G. Moolenbeek& M.J. Faber, 1987
Obtusella lata E. Rolán & F. Rubio, 1999
Lucidestea laterea C.F. Laseron, 1956
Pusillina latiambita (W.F. Ponder, 1967)
Onoba laticingulata A.N. Golikov& O.V. Kussakin, 1978
Setia latior (J.W. Mighels & C.B. Adams,1842)
Alvania laurae (FOSSIL) M.M. Brunetti & G. Vecchi,2012 †
Alvania lavaleyei H.J. Hoenselaar & J. Goud,1998
Pusillina lavallei (FOSSIL) Seguenza, 1903 †
Lironoba layardi (W.F. Petterd, 1884)