Boreotrophon apolyonis (W.H. Dall, 1919)
Favartia aporema Houart, 2016
Chicoreus aquitanicus (FOSSIL) J.P.S. Grateloup, 1833 †
Murex aquitaniensis (FOSSIL) J.P.S. Grateloup, 1848 †
Murexsul aradasii (T.A. de M. Monterosatoin N.J. Poirier, 1883)
Pagodula araios (R. Houart & W. Engl,2007)
Triplex aratus (FOSSIL) (L.M.D. Bellardi, 1872 †)
Chicoreus arbaguil R. Houart, 2015
Mipus arbutum (L.H. Woolacott, 1954)
Uttleya arcana (FOSSIL) J. Marwick, 1934 †
Tripterotyphis arcana (H. DuShane, 1969)
Orania archaea R. Houart, 1995
Urosalpinx archipatagonica (FOSSIL) H.F.A. von Ihering,1907 †
Siphonochelus arcuatus (R.B. Hinds, 1843)
Thais arenae (FOSSIL) B.F. Kensley & Pether,1986 †
Attiliosa arenaria (FOSSIL) Darragh, 2017 †
Pterochelus ariomus W.J. Clench& I. Pérez Farfante, 1945
Babelomurex armatus (G.B. III Sowerby, 1912)
Murexsul armatus (C.B. Adams, 1854)
Mancinella armigera J.H.F. Link, 1807
Mancinella armigera affinis (L.A. Reeve, 1846)
Enixotrophon arnaudi (G. Pastorino, 2002)
Chicoreus arrakanensis (FOSSIL) Noetling, 1895 †
Siratus articulatus (L.A. Reeve, 1845)
Chicoreus asanoi (FOSSIL) O. Masuda, 1956 †
Calotrophon ascensus (FOSSIL) E.H. Vokes, 1976 †
Ecphora asheri (FOSSIL) E.J. Petuch, 1988 †
Chicoreus asianus J.T. Kuroda, 1942
Murexsul asper R. Houart, 2004
Coralliophila aspera (A. Adams, 1855)
Morula aspera (J.B.P.A. Lamarck, 1816)
Bedeva asperulus (FOSSIL) (R. Tate, 1888 †)
Urosalpinx aspinosus (FOSSIL) (Meyer, 1886 †)
Murex asteriscus (FOSSIL) R. Tate, 1888 †
Enixotrophon atanua (R. Houart & J. Tröndlé,2008)