Terebra achates C.S. Weaver, 1960
Impages aciculina (J.B.P.A. Lamarck, 1822)
Terebra aciculina L.A. Reeve, 1860
Terebra aclinica (FOSSIL) A.A. Olsson, 1967 †
Hastula acumen (G.P. Deshayes, 1859)
Terebra acuminata (FOSSIL) S. Borson, 1820 †
Terebra acuminata neglecta (FOSSIL) O.G. Michelotti, 1847 †
Cinguloterebra adamsii (E.A. Smith, 1873)
Terebra additoides (FOSSIL) (Tenison Woods, 1877 †)
Myurella affinis (J.E. Gray, 1834)
Myurella affinis peasii G.P. Deshayes, 1859
Myurella aiyengari (FOSSIL) A. Dey, 1961 †
Terebra alaba (FOSSIL) McNeil, 1984 †
Terebra alagoensis S.F.B. de Lima, D. de Oliveira Tenório& J.C.N. Barros, 2007
Terebra alba J.E. Gray, 1834
Oxymeris albida (J.E. Gray, 1834)
Terebra albocancellata T. Bratcher, 1988
Hastula alboflava T. Bratcher, 1988
Duplicaria albofuscata (L. Bozzetti, 2008)
Duplicaria albozonata (E.A. Smith, 1875)
Hastula albula (K.T. Menke, 1843)
Hastula albula natalensis (E.A. Smith, 1903)
Terebra alisi U. Aubry, 1999
Terebra allyni T. Bratcher, T.A. Burch& R.D. Burch, 1970
Hastulopsis alveolata (R.B. Hinds, 1844)
Terebra amabilis (FOSSIL) J. Makiyama, 1927 †
Terebra amanda R.B. Hinds, 1844
Terebra amanda albomarginata G.P. Deshayes, 1859
Terebra amitra (FOSSIL) W.H. Dall, 1895 †
Hastulopsis amoena (G.P. Deshayes, 1859)
Hastula androyensis L. Bozzetti, 2008
Euterebra angelli (J. Gibson-Smith& W. Gibson-Smith, 1984)
Duplicaria angulifera (FOSSIL) (J. Marwick, 1931 †)
Cinguloterebra anilis (P.F. Röding, 1798)
Impages anomala (J.E. Gray, 1834)