Pararhytida abax (É. Marie, 1870)
Granallodiscus abaxoides B.A. Marshall & G.M. Barker,2008
Allodiscus absidatus B.A. Marshall & G.M. Barker,2008
Paryphantopsis abstrusa J. Slapcinsky, 2005
Flammocharopa accelerata (F.M. Climo, 1970)
Setomedea aculeata (C. Hedley, 1899)
Hedleyoconcha addita T. Iredale, 1944
Allodiscus adriana (F.W. Hutton, 1883)
Pillomena aemula (R. Tate, 1894)
Roblinella agnewi (C.M.D.E. Legrand, 1871)
Hedleyoconcha ailaketoae J. Stanisic, 1990
Climocella akarana J.F. Goulstone, 1996
Coenocharopa alata J. Stanisic, 1990
Pernagera albanensis (J.C. Cox, 1868)
Flammulina albozonata N.W. Gardner, 1969
Frustropa alea T. Iredale, 1945
Flammulina alpina H.H. Suter, 1904
Dentherona altior (T. Iredale, 1941)
Dipnelix alychnopis J.H. Macpherson, 1954
Ptychodon amancaezensis (J.G. Hidalgo, 1869)
Sinployea andrewi G.A. Solem, 1983
Cavellia anguicula (L.A. Reeve, 1852)
Rotacharopa annabelli J. Stanisic, 1990
Flammocharopa antialba (R.H. Beddome, 1879)
Thalassohelix antipoda (J.B. Hombron& C.H. Jacquinot, 1841)
Huonodon aorangi (H.H. Suter, 1890)
Discocharopa aperta (O.F. von Möllendorff,1888)
Reticulapex apexfortis K.C. Emberton & T.A. Pearce,2000
Flammulina arboricola (T. Iredale, 1913)
Amphidoxa arctispira (L. Pfeiffer, 1846)
Trachycystis ariel H.B. Preston, 1912
Sinployea atiensis (W.H. Pease, 1870)
Phenacohelix aurea J.F. Goulstone, 2001
Allodiscus aurora B.A. Marshall & G.M. Barker,2008
Gyrocochlea austera (C. Hedley, 1912)