Buccinaria abbreviata (M.M. Schepman, 1913)
Teretiopsis abyssalis Y.I. Kantor & A.V. Sysoev,1989
Pontiothauma abyssicola E.A. Smith, 1895
Gymnobela abyssorum (É.A.A. Locard, 1897)
Hemilienardia acinonyx Fedosov, Stahlschmidt, Puillandre, Aznar-Cormano& Bouchet, 2017
Nepotilla aculeata (W.L. May, 1916)
Pleurotomella aculeata (W.H. Webster, 1906)
Tasmadaphne aculeola (C. Hedley, 1915)
Teretia acus (K.H. Barnard, 1958)
Taranis adenensis M. Morassi & A. Bonfitto,2013
Gymnobela adenica A.V. Sysoev, 1996
Cryptodaphne adiaphora M. Morassi & A. Bonfitto,2010
Kermia aegyptiaca R.N. Kilburn & H. Dekker,2008
Neopleurotomoides aembe R.M.A. Figueira& R.S. Absalão, 2012
Aliceia aenigmatica P. Dautzenberg & H. Fischer,1897
Raphitoma aequalis (J.G. Jeffreys, 1867)
Eubela aequatorialis K.H.J. Thiele, 1925
Cenodagreutes aethus E.H. Smith, 1967
Cryptodaphne affinis (M.M. Schepman, 1913)
Gymnobela africana A.V. Sysoev, 1996
Gymnobela agassizii (A.E. Verrill & S. Smith,1880)
Gymnobela agassizii mexicana (W.H. Dall, 1889)
Kermia aglaia (J.C. Melvill, 1904)
Xanthodaphne agonia (W.H. Dall, 1890)
Pleurotomella aguayoi (A. Carcelles, 1953)
Mioawateria aitanga (FOSSIL) J. Grant-Mackie& M. Chapman-Smith, 1971 †
Spergo aithorrhis A.V. Sysoev & P. Bouchet,2001
Philbertia alba (G.P. Deshayes, 1863)
Phymorhynchus alberti (P. Dautzenberg& H. Fischer, 1906)
Kermia albicaudata (E.A. Smith, 1882)
Isodaphne albolineata R.N. Kilburn, 1977
Eucyclotoma albomacula E.A. Kay, 1979
Hemilienardia albomagna Wiedrick, 2017
Austrodaphnella alcestis (J.C. Melvill, 1906)
Philbertia alfredensis (W.H. Turton, 1932)