Acirsa aralica O.V. Amitrov, 2012
Epitonium arcanum H. DuShane, 1979
Globiscala arjani B. Kokshoorn & J. Goud,2007
Cycloscala armata E.F. Garcia, 2004
Epitonium arnoldi W.H. Dall, 1917
Epitonium artimi (F.P. Jousseaume, 1912)
Striaticostatum asperum (FOSSIL) N.F. Sohl, 1964 †
Amaea aspicienda (J.C. Melvill, 1912)
Epitonium atomus (E.A. Smith, 1890)
Epitonium audouini (F.P. Jousseaume, 1894)
Cylindriscala aurantia P. Bouchet & A. Warén,1986
Epitonium aureomaculatum (H. Masahito & T. Habe,1973)
Epidendrium aureum E. Gittenberger& A. Gittenberger, 2005
Opalia aurifila (W.H. Dall, 1889)
Epitonium auritum (G.B. Sowerby, 1844)
Epitonium austinense (FOSSIL) Stanton, 1947 †
Opalia australis (J.B.P.A. Lamarck, 1822)
Epitonium austrocaledonicum (R.P. Montrouzier, 1859)
Acirsa auversiensis (FOSSIL) G.P. Deshayes, 1861 †
Epitonium avalites (F.P. Jousseaume, 1912)
Acirsa awamoaensis (FOSSIL) (P. Marshall& R. Murdoch, 1921 †)
Epitonium babylonia (W.H. Dall, 1889)
Opalia bairdii (E.A. Smith, 1871)
Opalia ballinensis (E.A. Smith, 1891)
Gregorioiscala barazeri E.F. Garcia, 2004
Opalia bardeyi (F.P. Jousseaume, 1912)
Epitonium barissum (T. Iredale, 1936)
Epitonium barrandei (FOSSIL) G.P. Deshayes, 1861 †
Epitonium beachportense (B.C. Cotton& F.C. Godfrey, 1938)
Epitonium bellastriatum (P.P. Carpenter, 1864)
Epitonium bellicosum C. Hedley, 1907
Scalina belti (FOSSIL) DeVries, 2006 †
Epitonium bengalense (E.A. Smith, 1899)
Cirsotrema bennettorum E.F. Garcia, 2000
Epitonium bevdeynzerae E.F. Garcia, 2001