Bythiospeum nemausense H. Callot-Girardi, 2012
Belgrandiella nemethi H. Schütt, 1993
Pyrgulopsis neomexicana H.A. Pilsbry, 1916
Austropyrgus nepeanensis A. Clark, W.B. Miller& W.F. Ponder, 2003
Pyrgulopsis neritella R. Hershler, 1998
Hauffenia nesemanni A. Reischütz& P.L. Reischütz, 2006
Leiorhagium neteae M. Haase & S. Zielske,2015
Xestopyrguloides neumayri (FOSSIL) Willmann, 1981 †
Prososthenia neutra (FOSSIL) Š. Brusina, 1897 †
Pyrgulopsis nevadensis (R.E.C. Stearns, 1883)
Turricaspia nevesskae (A.N. Golikov& Y.I. Starobogatov, 1966)
Hydrobia newtoni (G.P.L.K. Gude, 1913)
Hadopyrgus ngataana M. Haase, 2008
Austropyrgus niger (J.R.C. Quoy& J.P. Gaimard, 1834)
Fluvidona nigra J.R.C. Quoy & J.P. Gaimard,1834
Caspiohydrobia nikitinskii Y.I. Starobogatov& S.I. Andreeva, 1981
Romania nikolajevici (FOSSIL) (Š. Brusina, 1902 †)
Caspiohydrobia nikolskii Y.I. Starobogatov& S.I. Andreeva, 1981
Pyrgula nikosi (FOSSIL) D. Esu & O. Girotti,2015 †
Saganoa nishidai T. Habe
Hydrobia nitens (FOSSIL) G.P. Deshayes, 1862 †
Plagigeyeria nitida H. Schütt, 1963
Pontobelgrandiella nitida (A.M. Angelov, 1972)
Caspia nitida (FOSSIL) (P.S. Pavlovic, 1927 †)
Austropyrgus nitidus (G. Johnston, 1879)
Wuconcha niuzhuangensis (Z. Kang, 1983)
Bythiospeum nocki M. Haase, A. Weigand& H. Haseke, 2000
Prososthenia nodosa (FOSSIL) Burgerstein, 1877 †
Goniochilus nodosus (FOSSIL) Pana, 1990 †
Pyrgula nodotiana (FOSSIL) J.R. Tournouër, 1866 †
Pyrgulopsis nonaria R. Hershler, 1998
Hydrobia norfolkensis E.R. Sykes, 1900
Bythiospeum noricum (A. Fuchs, 1929)
Pyrgula nossovi (C.M. Kolesnikov, 1947)
Antibaria notata (G.R. von Frauenfeld,1865)