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