Ponentina antoni (E. Gittenberger, 2012)
Trochoidea antoniae (P.M. Pallary, 1906)
Leucochroopsis apicalis (FOSSIL) (A.E. Reuss, 1861 †)
Xerotricha apicina (J.B.P.A. Lamarck, 1822)
Archaica apollinis (E.C. Von Martens, 1882)
Euomphalia appeliana (A. Mousson, 1876)
Cernuella aradasii (E. Pirajno, 1842)
Kalitinaia arcadiana (A.A. Schileyko, 1967)
Actinella arcinella (R.T. Lowe, 1854)
Actinella arcta (R.T. Lowe, 1831)
Candidula arganica (G. Servain, 1880)
Xerotricha arguineguinensis (M. Seddon & M.T. Aparicio,1998)
Euomphalia aristata (I. Krynicki, 1836)
Caucasigena armeniaca (L. Pfeiffer, 1846)
Actinella armitageana R.T. Lowe, 1852
Xerosecta arnaizi P.M. Pallary, 1936
Candidula arrabidensis G.A. Holyoak & D.T. Holyoak,2014
Actinella arridens (R.T. Lowe, 1831)
Cernuella arrouxi (J.R. Bourguignat, 1863)
Amandana arturi (F. Haas, 1924)
Monacha ascania B. Hausdorf, 2000
Leucochroopsis asthena (FOSSIL) (Bourguignat, 1881) †
Cryptosaccus asturiensis C.E. Prieto & A. Puente,1994
Monacha atacis E. Gittenberger& A.J. de Winter, 1985
Trichia ataxiaca (P. Fagot, 1884)
Discula attrita (R.T. Lowe, 1831)
Monacha auturica G. Falkner, 2000
Leptaxis azorica J.A. Albers, 1852
Xeroleuca babelis (P.M. Pallary, 1920)
Monachoides bacescui A.V. Grossu, 1979
Euomphalia bactriana (F.W. Hutton, 1849)
Monacha badia B. Hausdorf, 2000
Caseolus baixoensis H.W. Waldén, 1983
Edentiella bakowskii (W. Polinski, 1924)
Amandana barceloi (J.G. Hidalgo, 1878)