Gemmula murrayi A.W.B. Powell, 1964
Iotyrris musivum Y.I. Kantor, N. Puillandre, B.M. Olivera& P. Bouchet, 2008
Gemmula mystica L.R.L. Simone, 2005
Turris nadaensis M. Azuma, 1973
Turridrupa nagasakiensis (E.A. Smith, 1879)
Hemipleurotoma narica (FOSSIL) E.W. Vredenburg, 1925 †
Lophiotoma natalensis L. Bozzetti, 2016
Eopleurotoma nigeriensis (FOSSIL) R.B. Newton, 1922 †
Decollidrillia nigra T. Habe & K. Itô, 1965
Gemmula nilssoni (FOSSIL) (G.P. Deshayes, 1865 †)
Kuroshioturris nipponica T. Shuto, 1961
Polystira nobilis (R.B. Hinds, 1843)
Turris nodifera (FOSSIL) (J.B.P.A. Lamarck,1822 †)
Turris nodigera (FOSSIL) A. von Koenen †
Hesperiturris nodocarinatus (FOSSIL) (W.M. Gabb, 1860 †)
Coronia nodulina (FOSSIL) (T.L. Casey, 1904 †)
Ptychosyrinx nodulosus (J.F. Gmelin, 1791)
Turris normandavidsoni B.M. Olivera, 2000
Pleurotoma notata (FOSSIL) Bell, 1871 †
Lora novaiasemliensis (W. Leche, 1878)
Fusimilis novemcostatus (FOSSIL) T.A. Conrad, 1858 †
Eoclathurella obesula (FOSSIL) †
Pleurofusia oblivia (FOSSIL) (T.L. Casey, 1903 †)
Eopleurotoma obscurata (FOSSIL) (F.E. Edwards, 1861 †)
Gemmula odontella (FOSSIL) (F.E. Edwards, 1861 †)
Pinguigemmula okinavensis (FOSSIL) F.S. MacNeil, 1960 †
Lophiotoma olangoensis B.M. Olivera, 2002
Gemmula oldhami (L.C. Kiener, 1839)
Andicula olssoni (FOSSIL) Rivera, 1957 †
Turris omnipurpurata J.L. Vera-Peláez, R. Vega-Luz& M.C. Lozano, 2000
Polystira opulenta (FOSSIL) P.O. Jung, 1971 †
Gemmula orba (FOSSIL) J. Marwick, 1931 †
Cryptogemma oregonensis W.H. Dall, 1919
Gemmula ornata (FOSSIL) (P. Marshall, 1918 †)
Polystira oxytropis (G.B. I Sowerby, 1834)