Rothifruticicola nicosiana maasseni R.A. Bank, 1991 Greece, Crete Island12 mm
Leptaxis niphas L. Pfeiffer, 1857 Azores
Xerosecta nisslei (P.M. Pallary, 1904) Morocco, cap Cantin12 mm
Actinella nitidiuscula (G.B. I Sowerby, 1824) Portugal, Madeira10 mm
Leptaxis nivosa (G.B. I Sowerby, 1824) Portugal, Porto Santo14 mm
Leptaxis nivosa calensis R.A. Bank, K. Groh& T.E.J. Ripken, 2002 Portugal, Madeira
Lindholmomneme nordenskioldi (C.A. Westerlund, 1876) Kazakhstan12 mm
Monacha nordsiecki B. Hausdorf, 2000 Turkey
Lindholmomneme notophila (T.D.A. Cockerell, 1924) Russia, Primorye
Metafruticicola noverca (L. Pfeiffer, 1853) Greece, Crete Island16,1 mm
Diodontella nubigena W.A. Lindholm, 1929 Caucasus
Helicella nubigena (De Saulcy, 1852) Spain, Asturias19 mm
Xerotricha nubivaga (J.F. Mabille, 1882) Canary Islands, Tenerife5,7 mm
Angiomphalia nucula A.A. Schileyko& T.S. Rymzhanov, 2010 Kazakhstan
Monacha nummus (C.G. Ehrenberg, 1831) Turkey, Iskenderun gulf15 mm
Amandana nyeli (H. Mittre, 1844) Spain, Majorca8 mm
Amandana nyeli ponsi (J.G. Hidalgo, 1878) Baleares
Pyrenaearia oberthuri (C.M.F. Ancey, 1884) Spain, Asturias13,1 mm
Moreletina obruta (P.M.A. Morelet, 1860) Azores
Actinella obserata R.T. Lowe, 1852 Portugal, Madeira
Monacha obstructa (L. Pfeiffer, 1842) Israel10 mm
Spirorbula obtecta (R.T. Lowe, 1831) Portugal, Madeira8 mm
Helicella obvia (K.T. Menke, 1828) Slovakia18,2 mm
Helicella obvia pappi H. Schütt, 1962 Macedonia18 mm
Harmozica occidentalis B. Hausdorf, 2004 Turkey
Elbasania occidentalis (P. Subai, 1999) Greece, Ipiros
Trichia occidentalis J. Castillejo, 1986 Portugal, Lisboa7 mm
Monacha ocellata (J.R. Roth, 1839) Bulgaria
Ponentina octoglandulosa D.T. Holyoak& G.A. Holyoak, 2012 Portugal, Pontevedra
Hygromia odeca (J.R. Bourguignat, 1882) France, Pyrenees
Monacha oecali B. Hausdorf& B. Páll-Gergely, 2009 Turkey, Antalya
Metafruticicola oerstani B. Hausdorf, B.A. Gümüs& M.Z. Yildirim, 2004 Turkey
Helicella oertzeni (H. von Maltzan, 1887) Greece, Crete Island
Ciliellopsis oglasae F.L. Giusti& G. Manganelli, 1990 Italy, Isola di Montecristo
Candidula olisippensis (G. Servain, 1880) Portugal, Lisboa