Bythiospeum nemausense H. Callot-Girardi, 2012 France, Nimes
Belgrandiella nemethi H. Schütt, 1993
Pyrgulopsis neomexicana H.A. Pilsbry, 1916 New Mexico, Socorro County
Austropyrgus nepeanensis A. Clark, W.B. Miller& W.F. Ponder, 2003 Australia, Wingecarribee
Pyrgulopsis neritella R. Hershler, 1998 Nevada, White Pine County
Hauffenia nesemanni A. Reischütz& P.L. Reischütz, 2006 Austria
Leiorhagium neteae M. Haase & S. Zielske,2015
Xestopyrguloides neumayri (FOSSIL) Willmann, 1981 †
Prososthenia neutra (FOSSIL) Š. Brusina, 1897 † Croatia
Pyrgulopsis nevadensis (R.E.C. Stearns, 1883) USA, Utah, Pyramid Lake5 mm
Turricaspia nevesskae (A.N. Golikov& Y.I. Starobogatov, 1966)
Hydrobia newtoni (G.P.L.K. Gude, 1913) Ukraine
Hadopyrgus ngataana M. Haase, 2008 New Zealand
Austropyrgus niger (J.R.C. Quoy& J.P. Gaimard, 1834) Tasmania2 mm
Fluvidona nigra J.R.C. Quoy& J.P. Gaimard, 1834 Australia
Caspiohydrobia nikitinskii Y.I. Starobogatov& S.I. Andreeva, 1981 Aral Lake
Romania nikolajevici (FOSSIL) (Š. Brusina, 1902 †)
Caspiohydrobia nikolskii Y.I. Starobogatov& S.I. Andreeva, 1981 Aral Lake
Pyrgula nikosi (FOSSIL) D. Esu & O. Girotti,2015 † Greece, Achaia
Saganoa nishidai T. Habe
Hydrobia nitens (FOSSIL) G.P. Deshayes, 1862 † France, Paris Basin
Plagigeyeria nitida H. Schütt, 1963 Europe
Pontobelgrandiella nitida (A.M. Angelov, 1972) Bulgaria, Stara Planina Mount
Caspia nitida (FOSSIL) (P.S. Pavlovic, 1927 †)
Austropyrgus nitidus (G. Johnston, 1879) Tasmania
Wuconcha niuzhuangensis (Z. Kang, 1983) China, HuBei
Bythiospeum nocki M. Haase, A. Weigand& H. Haseke, 2000 Austria
Prososthenia nodosa (FOSSIL) Burgerstein, 1877 †
Goniochilus nodosus (FOSSIL) Pana, 1990 †
Pyrgula nodotiana (FOSSIL) J.R. Tournouër, 1866 †
Pyrgulopsis nonaria R. Hershler, 1998 Utah, San Pete County
Hydrobia norfolkensis E.R. Sykes, 1900 Norfolk Island
Bythiospeum noricum (A. Fuchs, 1929) Europe
Pyrgula nossovi (C.M. Kolesnikov, 1947) Azerbaijan
Antibaria notata (G.R. von Frauenfeld,1865) Montenegro