Gulella ndamanyiluensis L.A.W.C. Venmans Tanzania
Stereostele nevilli (C.B. Adams, 1867) Seychelles
Stereostele nevilli parvidentata J. Gerlach& A.C. van Bruggen, 1999 Seychelles15,5 mm
Gonidomus newtoni A. Adams, 1867
Juventigulella ngerezae B. Rowson, 2007 Tanzania, Morogoro
Dadagulella nictitans (B. Rowson & C.N. Lange,2007) Kenya
Gulella nifikelia K.C. Emberton, 2001
Edentulina nitens (P. Dautzenberg, 1895) Madagascar
Eustreptaxis nobilis J.E. Gray Liberia
Gulella nosybei K.C. Emberton, 2001
Tayloria nseudweensis (S. Putzeys, 1899)
Discartemon nummus (F.F. Laidlaw, 1929) Thailand, Phatthalung
Gulella obani O.C. Oke, 2007 Nigeria
Edentulina obesa (J.W. Taylor, 1877)
Elma oblongata T.C. Yen, 1939 China, Guangdong province
Gulella obovata (L. Pfeiffer, 1855)
Haploptychius occidentalis (P.M. Heude, 1874) China, Guangxi province10,5 mm
Gulella odhneriana C. Dupuis, 1923 Kenya
Costigulella odietei O.C. Oke, 2013 Nigeria3 mm
Costigulella ogbeifuni O.C. Oke, 2013 Nigeria2,7 mm
Ptychotrema okei (A.J. de Winter, 1996) Nigeria9,9 mm
Gulella opoboensis H.B. Preston, 1914 Nigeria3,2 mm
Perrottetia oppidulum (A.R.J.B. Bavay& P. Dautzenberg, 1908) Vietnam, Tonkin
Gulella orchida K.C. Emberton, 2001
Silvigulella osborni H.A. Pilsbry, 1919
Parvedentulina ovatostoma K.C. Emberton& T.A. Pearce, 2000 Madagascar
Edentulina ovoidea (J.G. Bruguière, 1792) Madagascar31,5 mm
Haploptychius pachychilus (O.F. von Möllendorff,1884) Laos12 mm
Oophana pachyglottis (O.F. von Möllendorff,1900) Central Vietnam
Elma pachygyra (P.V. Gredler, 1885) HuNan, China
Gonidomus pagodus (A.E.J. Férussac, 1827) Mauritius
Hypselartemon paivanus (L. Pfeiffer, 1867) Brazil5 mm
Gonospira palanga (A.E.J. Férussac, 1821) Mauritius
Discartemon pallgergelyi Thach, 2017
Ennea paradoxulum (E.C. Von Martens, 1895)