Bullia ancillaeformis E.A. Smith, 1906
Cyllenina ancillariaeforme (FOSSIL) (J.P.S. Grateloup,1834 †)
Anbullina ancillops (FOSSIL) (A. Heilprin, 1891 †)
Nassarius angolensis (N.H. Odhner, 1923)
Cyllene angsanana (FOSSIL) K. Martin, 1921 †
Nassarius anguliferus (A. Adams, 1852)
Northia angulosa F.P. Jousseaume, 1898
Nassarius anisonema (FOSSIL) Gardner, 1944 †
Reticunassa annabolteae L.A. Galindo, H.H. Kool& H. Dekker, 2017
Bullia annulata (J.B.P.A. Lamarck, 1816)
Nassarius anomalus (FOSSIL) (F.W. Harmer, 1914 †)
Sudonassarius antarctohimaleos (FOSSIL) J.D. Stilwell& Zinsmeister, 1992 †
Phrontis antillarum (A.V.M.D. D'Orbigny,1847)
Nassarius aoteanus H.J. Finlay, 1926
Nassarius aquitanicus (FOSSIL) C. Mayer, 1858 †
Ilyanassa arata (FOSSIL) (T. Say, 1824 †)
Nassarius arcadioi E. Rolán & J.M. Hernández,2005
Nassarius arcularia (C. Linnaeus, 1758)
Nassarius arcularia plicatus (P.F. Röding, 1798)
Nassarius arcus (W.O. Cernohorsky, 1991)
Nassarius argenteus (F.P. Marrat, 1877)
Neoteron ariel H.A. Pilsbry & H.N. Lowe,1932
Pseudocominella armata (FOSSIL) (Sowerby & G. Dixon,1850 †)
Antillophos armillatus K. Fraussen & G.T. Poppe,2005
Uzita armuella (FOSSIL) A.A. Olsson, 1942 †
Tritia arnoldi (FOSSIL) F.M. Anderson †
Metaphos articulatus (R.B. Hinds, 1844)
Nassaria aspera (J.T. Kuroda, 1961)
Nassarius asperula (FOSSIL) (G.B. Brocchi, 1814 †)
Nassarius atlantideus W. Adam & J. Knudsen,1984
Keepingia auversiensis (FOSSIL) (G.P. Deshayes, 1865 †)
Nassarius babylonicus (R.B. Watson, 1882)
Cyllene baccata (FOSSIL) (B. de Basterot, 1825 †)
Nassarius badensis (FOSSIL) (P. Partschin R. Hoernes, 1852 †)
Antillophos bahamensis E.J. Petuch, 2002