Gulella selene A.C. van Bruggen& J.L. Van Goethem, 1999
Gulella sexdentata (E.C. Von Martens, 1869)
Gulella soulaiana E. Fischer-Piette, 1973
Gulella streptosteleopsis A.C. van Bruggen, 2007
Gulella suavissima (H.B. Preston, 1913)
Gulella subhyalina (E.A. Smith)
Gulella subringens (J.C.H. Crosse, 1886)
Gulella sylvia (J.C. Melvill& J.H. Ponsonby, 1903)
Gulella systemanaturae A.C. van Bruggen, 2008
Gulella taitensis B. Verdcourt, 1963
Gulella taolantehezana K.C. Emberton, 2002
Gulella tendronia K.C. Emberton, 2001
Gulella tharfieldensis (J.C. Melvill& J.H. Ponsonby, 1893)
Gulella thompsoni K.C. Emberton, 2010
Gulella tracheia B. Rowson, 2007
Gulella translucida (L. Pfeiffer, 1852)
Gulella triglochis (J.C. Melvill& J.H. Ponsonby, 1903)
Gulella tsaratananae K.C. Emberton, 2001
Gulella udzungwensis A.C. van Bruggen, 2007
Gulella umzimvubensis H.C. Burnup, 1925
Gulella unidentata L. Pfeiffer
Gulella usambarica A. Craven, 1880
Gulella vakinifia K.C. Emberton, 2001
Gulella vatosoa K.C. Emberton, 2001
Gulella vavakelia K.C. Emberton, 2001
Gulella virungae A.C. van Bruggen& J.L. Van Goethem, 1999
Gulella vohimarae K.C. Emberton, 2001
Gulella vriesiana (C.M.F. Ancey, 1885)
Gulella wahlbergi T. Kira, 1955
Gulella warreni (J.C. Melvill& J.H. Ponsonby, 1903)
Gulella zuluensis M. Connolly, 1932
Avakubia avakubiensis H.A. Pilsbry, 1919
Conogulella conospira (E.C. Von Martens, 1892)
Costigulella egborgei O.C. Oke, 2013
Costigulella mfamosingi O.C. Oke, 2013
Costigulella odietei O.C. Oke, 2013
Costigulella ogbeifuni O.C. Oke, 2013