Melania abbreviata (FOSSIL) Terquem, 1855 †
Melania abrupta I. Lea, 1845
Melanoides abuhabili (FOSSIL) Alhejoj & K. Bandel,2013 †
Thiara acanthina I. Lea, 1850
Melanoides acrea L.A. Reeve
Melania acuta (FOSSIL) Moore †
Melania acutestriata (FOSSIL) Klipstein, 1843 †
Melanoides acutospira (I. Lea, 1850)
Longiverena adjuntaensis (FOSSIL) R. Vega & Perilliat,1992 †
Melanoides admirabilis (E.A. Smith, 1880)
Melania afra E.A. Rossmässler, 1839
Melanoides agglutinans J.C. Bequaert & W.J. Clench,1941
Melania alberti (FOSSIL) Klipstein, 1843 †
Melanoides albescens (I. Lea, 1850)
Coptostylus albidus (FOSSIL) (J.B.P.A. Lamarck,1804 †)
Melanoides alkmaarensis M.M. Schepman, 1919
Campylostylus allobroga (FOSSIL) P. Oppenheim, 1892 †
Stenomelania amabilis (G. von dem Busch)
Thiara amarula (C. Linnaeus, 1758)
Thiara amaruloidea T. Iredale, 1918
Melanoides angolensis G. Mandahl-Barth, 1974
Melania anomala (FOSSIL) B.W. Jenkins, 1864 †
Melanoides anomala P. Dautzenberg & J. Germain,1914
Hemisinus antiguensis (FOSSIL) J. Brown & H.A. Pilsbry,1914 †
Aylacostoma araguayana (H.F.A. von Ihering,1902)
Melania araucana (FOSSIL) R.A. Philippi, 1887 †
Potadomoides armata (FOSSIL) Musalizi, 2017 †
Stenomelania aspirans (R.B. Hinds, 1844)
Hemisinus atriformis (FOSSIL) Cooke, 1919 †
Pachymelania aurita (O.F. Müller, 1774)
Thiara australis (I. Lea, 1857)
Aylacostoma ava (FOSSIL) H.A. Pilsbry& A.A. Olsson, 1935 †
Melanoides badia (J. Henderson, 1898)
Thiara baldwini C.M.F. Ancey, 1899
Thiara balonnensis T.A. Conrad, 1850