Lucidestea muratensis (B.C. Cotton, 1944)
Onoba muriei (P. Bartsch & H.A. Rehder,1939)
Alvania mutabilis G. Schwartz, 1869
Rissoa mylensis (FOSSIL) Seguenza, 1903 †
Pusillina nana (FOSSIL) (G.P. Deshayes, 1861 †)
Pusillina nana (FOSSIL) (J.B.P.A. Lamarck,1804 †)
Alvania nestaresi M. Oliverio & B. Amati,1990
Setia netoae S.P. Ávila & J. Cordeiro,2014
Alvania nicobarica (K.H.J. Thiele, 1925)
Alvania nicolauensis R.G. Moolenbeek & E. Rolán,1988
Setia nicoleae W. Segers, F. Swinnen& R. De Prins, 2009
Alvania nihonkaiensis K. Hasegawa, 2014
Onoba nikolarianae J.J. Oberling, 1970
Pusillina nilae (FOSSIL) C. Bogi & C. Chirli,2004 †
Alvania nina M.J. Faber, 2010
Rissoa nina F. Nordsieck, 1972
Thaleia nisonis (W.H. Dall, 1889)
Lucidestea nitens (G.R. von Frauenfeld,1867)
Alvania nitida (FOSSIL) M.M. Brunetti & G. Vecchi,2012 †
Mohrensternia nitida (FOSSIL) Zhizhchenko, 1936 †
Peringiella nitida M.E.J. Bucquoy, P. Dautzenberg& G.F. Dollfus, 1884
Onoba nivosa A.W.B. Powell, 1957
Setia nomeae R.G. Moolenbeek& T. Piersma, 1990
Alvania nonsculpta H.J. Hoenselaar & J. Goud,1998
Merelina norfolkensis F. Criscione & W.F. Ponder,2011
Alvania novarensis G.R. von Frauenfeld, 1867
Simulamerelina novemstriata M.J. Faber& R.G. Moolenbeek, 2004
Onoba nunezi E. Rolán & J.M. Hernández,2004
Pusillina oamarutica (FOSSIL) (Finlay, 1924 †)
Lucidestea obesa C.F. Laseron, 1956
Onoba obessa J. Grant-Mackie& M. Chapman-Smith, 1971
Rissoa obesula P. Dautzenberg, 1889
Onoba obliqua (A. Warén, 1974)
Onoba obliquata (A.W.B. Powell, 1940)
Alvania obliquicostata (FOSSIL) Wang, 1981 †