Incaglaia adusta tumens (F. Haas, 1955)
Alopia adventicia M. von Kimakowicz, 1894
Synprosphyma aegrota Hunyadi & Szekeres, 2016
Pliciphaedusa aenea (H.A. Pilsbry, 1903)
Oospira aenigmatica E.R. Sykes, 1894
Macroptychia aethiopica J.R. Bourguignat, 1883
Mesophaedusa affinis (H. Minato & A. Tada,1987)
Macroptychia africana (J.C. Melvill& J.H. Ponsonby, 1899)
Quadriplicata aggesta (O. Böttger, 1878)
Quadriplicata aggesta stauropolitana (O.W. Von Rosen, 1901)
Medora agnata (L. Pfeiffer, 1842)
Medora agnata cognata (O. Böttger, 1877)
Medora agnata delimaeformis H. Nordsieck, 1970
Lindholmiella ahuiri J. Grego & M. Szekeres,2011
Megalophaedusa akiratadai H. Minato, 1978
Heterozaptyx akoensis Y. Hirase, 1957
Akramowskia akramowskii (I.M. Likharev, 1962)
Sprattia aksoylari M.Z. Yildirim, 1997
Sprattia aksuensis H. Nordsieck, 2004
Albinaria alajana O. Böttger, 1896
Albinaria alajana dobati H. Nordsieck, 1984
Megalophaedusa albela (H. Minato, 1976)
Cristataria albersi (J.G.F. de Charpentier,1852)
Oospira albiapex (C.K. Chang & T. Okubo,1994)
Peruinia albicolor W.K. Weyrauch, 1957
Albinaria albicosta (O. Böttger, 1877)
Delima albocincta (L. Pfeiffer, 1841)
Parabalea albocostata W.K. Weyrauch, 1957
Parabalea albocostata pygmaea W.K. Weyrauch, 1964
Cyclonenia albosuturalis H. Nordsieck, 2005
Thaumatoptyx alloptyx H. Nordsieck, 2003
Isabellaria almae (O. Böttger, 1889)
Medora almissana (H.C. Küster, 1847)
Medora almissana mariae H. Nordsieck, 1970
Quadriplicata alpestris H. Nordsieck, 1975