Cerithium ancisum (FOSSIL) (M. Yokoyama, 1929 †)
Bittium anembatum (J.C. Melvill, 1904)
Taxonia angsanana (FOSSIL) (Martin, 1922 †)
Neostylidium anita (FOSSIL) (T.H. Aldrich, 1911 †)
Ptychocerithium ansuriensis (FOSSIL) Abbass, 1967 †
Cerithium apenninicum (FOSSIL) (C. Mayer, 1886 †)
Cerithium apenninicum dertosulcatum (FOSSIL) F. Sacco, 1895 †
Cerithium apheles (FOSSIL) J.E. Tenison-Woods,1879 †
Ptychocerithium archiaci (FOSSIL) E.W. Vredenburg, 1928 †
Bittium arctum J.B. Hombron& C.H. Jacquinot, 1852
Bittium arenaense L.G. Hertlein & A.M. Strong,1951
Colina arifi L. Bozzetti, 2011
Lirobittium armillatum (P.P. Carpenter, 1864)
Bittium arnoldi P. Bartsch, 1911
Rhinoclavis articulata (A. Adams & L.A. Reeve,1850)
Tenuicerithium ascensum (FOSSIL) R.C. Hoerle, 1972 †
Rhinoclavis aspera (C. Linnaeus, 1758)
Alabina asperoides (FOSSIL) (W.M. Gabb, 1873 †)
Alabina asperoides canaliculata (FOSSIL) (W.M. Gabb, 1873 †)
Cerithium asperulum (FOSSIL) Moore †
Lirobittium asperum (FOSSIL) (W.M. Gabb, 1861 †)
Thericium ataturki (FOSSIL) B.M. Landau & al., 2013 †
Cerithium ataxense (FOSSIL) (A.V.M.D. D'Orbigny †)
Bittium atramentarium J.C. Melvill & R. Standen,1901
Cerithium atratum (I. von Born, 1778)
Cerithium atromarginatum P. Dautzenberg & J.L. Bouge,1933
Lirobittium attenuatum (P.P. Carpenter, 1864)
Lirobittium attenuatum boreale P. Bartsch, 1911
Cerithium attritum (FOSSIL) W.H. Hudleston, 1889 †
Cerithium austinense (FOSSIL) F.A. Roemer, 1888 †
Cerithidium australiense K.H.J. Thiele, 1930
Zefallacia australis (FOSSIL) (H.H. Suter, 1919 †)
Uchauxia badri (FOSSIL) Abbass †
Cerithinella bajocense (FOSSIL) W.H. Hudleston, 1889 †
Cerithium balletoni A. Cecalupo, 2009