Raphitoma alida F. Pusateri& R. Giannuzzi-Savelli, 2016
Taranis aliena (FOSSIL) (J. Marwick, 1965 †)
Daphnella allemani (P. Bartsch, 1931)
Pleurotomella allisoni H.A. Rehder & H.S. Ladd,1973
Taranis allo (F.P. Jousseaume, 1934)
Pseudodaphnella alternans (E.A. Smith, 1882)
Raphitoma alternans (T.A. de M. Monterosato,1884)
Gymnobela altispira A.V. Sysoev & D.L. Ivanov,1985
Kermia alveolata (P. Dautzenberg, 1912)
Tritonoturris amabilis (R.B. Hinds, 1843)
Nepotilla amoena (G.O. Sars, 1878)
Pleurotomella amphiblestrum (J.C. Melvill, 1904)
Taranidaphne amphitrites (J.C. Melvill & R. Standen,1903)
Clinuropsis ampla (FOSSIL) (Briart & Cornet, 1870 †)
Asperdaphne amplecta C. Hedley, 1922
Teretia anceps (FOSSIL) (K.E.I. von Eichwald,1830 †)
Pleurotomella anceyi (P. Dautzenberg& H. Fischer, 1897)
Daphnella angulata T. Habe & O. Masuda, 1990
Rimosodaphnella angulata (J.T. Kuroda, 1958)
Gymnobela angulosa A.V. Sysoev, 1988
Daphnella angustata (G.B. III Sowerby, 1886)
Kermia aniani E.A. Kay, 1979
Pleurotomella annulata K.H.J. Thiele, 1912
Stilla anomala A.W.B. Powell, 1955
Pleurotomella anomalapex A.W.B. Powell, 1951
Daphnella antillana J. Espinosa& R. Fernández-Garcés, 1990
Thesbia antiselli (FOSSIL) (F.M. Anderson& B. Martin, 1914 †)
Raphitoma antonjanseni (FOSSIL) R. Marquet, 1998 †
Leiosyrinx apheles P. Bouchet & A.V. Sysoev,2001
Kermia apicalis (R.P. Montrouzier, 1861)
Hemilienardia apiculata (R.P. Montrouzier, 1864)
Gymnobela aquilarum (R.B. Watson, 1882)
Daphnella arafurensis (E.A. Smith, 1884)
Xanthodaphne araneosa (R.B. Watson, 1881)
Pontiothauma archibenthale (J.C. Melvill & R. Standen,1907)