Otala abrolena (J.R. Bourguignat, 1864) Algeria, Oran
Codringtonia acarnanica (W. Kobelt, 1902) Greece
Chilostoma achates E.A. Rossmässler, 1835 Italy, Trento27 mm
Chilostoma achates stiriae (L. Forcart, 1933) Austria
Tacheocampylaea acropachia (J.F. Mabille, 1880) France, Corse Island24 mm
Corneola acrotricha (P. Fischer, 1877) Italy, Lucca23,6 mm
Chilostoma adelozona (P. von Ströbel, 1857) Italy, Bergamo25 mm
Chilostoma adelozona adamii W. Kobelt, 1873 Italy, Bergamo
Chilostoma adelozona debettae G.B. Adami, 1876 Italy, Brescia
Chilostoma adelozona rhaeticum (P. von Ströbel, 1857) Italy, Sondrio20 mm
Arianta aethiops (E.A. Bielz, 1851) Romania
Otala ahmarina (P.M. Pallary, 1920) Morocco, cap Cantin
Otala ahmarina kesebiana (P.M. Pallary, 1920) Morocco, cap Cantin39 mm
Atlasica ahuiri T. Cossignani, 2012 Morocco, Tan-Tan27,8 mm
Dupotetia alabastra (J. Péchaud, 1883) Morocco, cap Cantin26 mm
Dupotetia alabastra zonata (P.M. Pallary, 1926) Morocco, cap Cantin27 mm
Alabastrina alabastrites (A. Michaud, 1833) Morocco, cap Cantin31,8 mm
Liburnica albanograeca (P. Subai, 1995) Greece24 mm
Helix albescens G. Jan in E.A. Rossmässler, 1839 Ukraine32,3 mm
Palaeotachea alloiodes (FOSSIL) (Thomä, 1845) †
Iberus alonensis (A.E.J. Férussac, 1821) Spain39 mm
Iberus alonensis labiatus J. Galindo, 2016 Spain, Almeria41 mm
Iberus alonensis ornatissimus C. Cobos, 1979 Spain27 mm
Chilostoma alpinum (A.E.J. Férussac, 1821) Italy, Alpes Centrales15 mm
Faustina altenburgensis (FOSSIL) (E.E. Binder, 1977 †)
Iberus alvaradoi E. Garcia San Nicolás,1957 Spain31 mm
Dupotetia alvisetiana P.M. Pallary, 1926 Morocco, cap Cantin24,59 mm
Kosicia ambrosi (P. von Ströbel, 1851) Italy, Alpes North East12 mm
Thiessea amorgia (C.A. Westerlund, 1889) Greece, Naxos
Helix amphibulina A.E.J. Férussac in G.P. Deshayes, 1839
Loxana anatisana (P.M. Pallary, 1928) Morocco, cap Cantin29 mm
Helix anctostoma E.C. Von Martens, 1874 Syria
Theba andalusica E. Gittenberger& T.E.J. Ripken, 1987 Spain17 mm
Atlasica anflousiana J. Galindo, 2016 Morocco, Marrakech22,4 mm
Tingitana anoceurensis (P.M. Pallary, 1918) Morocco, cap Cantin29 mm