Paramoria absidata (FOSSIL) (B.C. Cotton, 1949 †)
Athleta abyssicola Petuch & Berschauer, 2017
Athleta abyssicola (A. Adams & L.A. Reeve,1848)
Spinomelon aculeata (FOSSIL) (F.W. Hutton, 1885 †)
Volutifusus acus (FOSSIL) E.J. Petuch, 1988 †
Alcithoe acuta (FOSSIL) J. Marwick, 1926 †
Lyria acuticostulata (FOSSIL) T.A. Darragh, 1989 †
Lyria aegyptiaca (FOSSIL) Abbass, 1967 †
Melo aethiopicus (C. Linnaeus, 1758)
Festilyria africana (L.A. Reeve,, 1856)
Callipara africana Bail & Aiken, 2017
Volutifusus aguayoi (W.J. Clench, 1940)
Alcithoe ahaweraensis (FOSSIL) J. Marwick, 1926 †
Callipara aikeni S.G. Veldsman, 2012
Callipara aikeni inhacaensis S.G. Veldsman, 2012
Callipara aikeni kosibayensis S.G. Veldsman, 2012
Alcithoe aillaudorum P. Bouchet & G.T. Poppe,1988
Provocator alabastrina (R.B. Watson, 1882)
Miomelon alarconi J. Stuardo & Villas, 1974
Alcithoe albescens P. Bail & A. Limpus, 2005
Voluta alfaroi (FOSSIL) W.H. Dall, 1912 †
Fulgoraria alforum N.N. Thach, 2014
Spinomelon allani (FOSSIL) J. Marwick, 1926 †
Fulgoraria allaryi (P. Bail, 2005)
Adelomelon alta (FOSSIL) (Sowerby, 1846 †)
Livonia alticostata (FOSSIL) R. Tate, 1889 †
Volutospina ambiguus (FOSSIL) (D.C. Solanderin G. Brander, 1766 †)
Pachycymbiola ameghinoi (FOSSIL) (H.F.A. von Ihering,1896 †)
Odontocymbiola americana (L.A. Reeve, 1856)
Odontocymbiola americana cleryana (S.A.A. Petit De La Saussaye, 1856)
Odontocymbiola americana macaensis I.S. Calvo & J. Coltro,1997
Odontocymbiola americana saotomensis I.S. Calvo & J. Coltro,1997
Ampulla americana (FOSSIL) A.A. Olsson, 1922 †
Scaphella americana (FOSSIL) Perrilliat, 1973 †
Nannamoria amicula T. Iredale, 1929