Otala abrolena (J.R. Bourguignat, 1864)
Codringtonia acarnanica (W. Kobelt, 1902)
Chilostoma achates E.A. Rossmässler, 1835
Chilostoma achates stiriae (L. Forcart, 1933)
Tacheocampylaea acropachia (J.F. Mabille, 1880)
Corneola acrotricha (P. Fischer, 1877)
Chilostoma adelozona (P. von Ströbel, 1857)
Chilostoma adelozona adamii W. Kobelt, 1873
Chilostoma adelozona debettae G.B. Adami, 1876
Chilostoma adelozona rhaeticum (P. von Ströbel, 1857)
Arianta aethiops (E.A. Bielz, 1851)
Otala ahmarina (P.M. Pallary, 1920)
Otala ahmarina kesebiana (P.M. Pallary, 1920)
Atlasica ahuiri T. Cossignani, 2012
Dupotetia alabastra (J. Péchaud, 1883)
Dupotetia alabastra zonata (P.M. Pallary, 1926)
Alabastrina alabastrites (A. Michaud, 1833)
Liburnica albanograeca (P. Subai, 1995)
Helix albescens G. Jan in E.A. Rossmässler,1839
Palaeotachea alloiodes (FOSSIL) (Thomä, 1845) †
Iberus alonensis (A.E.J. Férussac, 1821)
Iberus alonensis labiatus J. Galindo, 2016
Iberus alonensis ornatissimus C. Cobos, 1979
Chilostoma alpinum (A.E.J. Férussac, 1821)
Faustina altenburgensis (FOSSIL) (E.E. Binder, 1977 †)
Iberus alvaradoi E. Garcia San Nicolás,1957
Dupotetia alvisetiana P.M. Pallary, 1926
Kosicia ambrosi (P. von Ströbel, 1851)
Thiessea amorgia (C.A. Westerlund, 1889)
Helix amphibulina A.E.J. Férussacin G.P. Deshayes, 1839
Loxana anatisana (P.M. Pallary, 1928)
Helix anctostoma E.C. Von Martens, 1874
Theba andalusica E. Gittenberger& T.E.J. Ripken, 1987
Atlasica anflousiana J. Galindo, 2016
Tingitana anoceurensis (P.M. Pallary, 1918)