Alcyna acia (B.C. Cotton, 1948)
Stomatia acuminata J.F. Gmelin, 1791
Lirularia acuticostata (P.P. Carpenter, 1864)
Umbonium adamsi R.W. Dunker, 1877
Gibbula adansoni B.C.M. Payraudeau, 1827
Gibbula adansoni euxinica Andrjewski, 1937
Gibbula adansoni sulliotti T.A. de M. Monterosato,1888
Chlorodiloma adelaidae (R.A. Philippi, 1849)
Clanculus adesus (FOSSIL) (J. Marwick, 1931 †)
Trochus adrianensis (FOSSIL) C. Gemmellaro, 1889 †
Gibbula adriatica (R.A. Philippi, 1844)
Infundibulum aemulans A. Adams, 1854
Notogibbula aequisulcata (FOSSIL) (Tenison Woods, 1877 †)
Diloma aethiops (J.F. Gmelin, 1791)
Eurytrochus affinis (A. Garrett, 1872)
Gibbula affinis (FOSSIL) K.E.I. von Eichwald,1903 †
Conominolia aflexura (FOSSIL) C.R. Laws, 1941 †
Jujubinus africanus F. Nordsieck, 1973
Agagus agagus F.P. Jousseaume, 1894
Gibbula ahena H.B. Preston, 1908
Ethminolia akuana B.K. Raines, 2007
Clanculus alarconi H.A. Rehder, 1980
Clanculus albanyensis P. Jansen, 1995
Gibbula albida (J.F. Gmelin, 1791)
Clanculus albinus A. Adams, 1853
Jujubinus alboranensis C. Smriglio, P. Mariottini& M. Oliverio, 2015
Clanculus aloysii J.E. Tenison-Woods, 1876
Thalotia alternata (FOSSIL) (Tenison Woods, 1877 †)
Gibbula altispira (FOSSIL) A.E.M. Cossmann& M.A. Peyrot, 1916 †
Clanculus amaeunus R.A. Philippi, 1852
Trochus ambalensis (FOSSIL) Weir, 1925 †
Paroxystele amedei (FOSSIL) (Brogniart 1823 †)
Stomatolina angulata (A. Adams, 1850)
Priotrochus aniesae R.G. Moolenbeek & H. Dekker,1992
Gibbula anodosula (FOSSIL) F. Sacco, 1896 †