Pararhytida abax (É. Marie, 1870) New Caledonia
Granallodiscus abaxoides B.A. Marshall& G.M. Barker, 2008 New Zealand, South Island
Allodiscus absidatus B.A. Marshall& G.M. Barker, 2008 New Zealand
Paryphantopsis abstrusa J. Slapcinsky, 2005 Papua New Guinea
Flammocharopa accelerata (F.M. Climo, 1970) New Zealand
Setomedea aculeata (C. Hedley, 1899) New South Wales
Hedleyoconcha addita T. Iredale, 1944 Australia, Lord Howe Island
Allodiscus adriana (F.W. Hutton, 1883) New Zealand, North Island
Pillomena aemula (R. Tate, 1894) Australia, Gill Lake
Roblinella agnewi (C.M.D.E. Legrand, 1871) Tasmania
Hedleyoconcha ailaketoae J. Stanisic, 1990 Australia, Cairns6,7 mm
Climocella akarana J.F. Goulstone, 1996 New Zealand, North Island
Coenocharopa alata J. Stanisic, 1990 Australia, Beaudesert2,7 mm
Pernagera albanensis (J.C. Cox, 1868) Tasmania
Flammulina albozonata N.W. Gardner, 1969 New Zealand, Waipoua
Frustropa alea T. Iredale, 1945 Norfolk Island
Flammulina alpina H.H. Suter, 1904 New Zealand
Dentherona altior (T. Iredale, 1941) Australia, Snowy River
Dipnelix alychnopis J.H. Macpherson, 1954 Australia, Mondrain Island
Ptychodon amancaezensis (J.G. Hidalgo, 1869) Brazil
Sinployea andrewi G.A. Solem, 1983 Cook Islands
Cavellia anguicula (L.A. Reeve, 1852) New Zealand, Auckland
Rotacharopa annabelli J. Stanisic, 1990 Queensland
Flammocharopa antialba (R.H. Beddome, 1879) Australia
Thalassohelix antipoda (J.B. Hombron& C.H. Jacquinot, 1841) New Zealand
Huonodon aorangi (H.H. Suter, 1890) New Zealand
Discocharopa aperta (O.F. von Möllendorff,1888) Malaysia, Borneo
Reticulapex apexfortis K.C. Emberton& T.A. Pearce, 2000 Madagascar, Tulear
Flammulina arboricola (T. Iredale, 1913) New Zealand, Kermadec Islands
Amphidoxa arctispira (L. Pfeiffer, 1846) Chile, Juan Fernandez Island
Trachycystis ariel H.B. Preston, 1912 South Africa, Zululand
Sinployea atiensis (W.H. Pease, 1870) Cook Islands
Phenacohelix aurea J.F. Goulstone, 2001 New Zealand, North Island
Allodiscus aurora B.A. Marshall& G.M. Barker, 2008 New Zealand
Gyrocochlea austera (C. Hedley, 1912) Queensland