Atropis abbreviata (W.H. Pease, 1865)
Cryptassiminea adelaidensis H. Fukuda & W.F. Ponder,2005
Assiminea aethiopica K.H.J. Thiele, 1927
Taiwanassiminea affinis (Böttger, 1887)
Omphalotropis albescens (L. Pfeiffer, 1855)
Omphalotropis albocarinata A. Mousson, 1873
Omphalotropis albolabris (O.F. von Möllendorff,1897)
Assiminea aldra W.H. Dall, 1915
Assiminea alveolata J.M.R.M. Viader, 1939
Rapanella andersoni (FOSSIL) C.M. Cooke & W.J. Clench,1943 †
Angustassiminea andrewsiana (E.A. Smith, 1900)
Rugapedia androgyna H. Fukuda & W.F. Ponder,2004
Thaanumella angulosa (C.M.F. Ancey, 1890)
Assiminea angustata H.A. Pilsbry, 1901
Ovassiminea annulata A. Hallan, H. Fukuda& Kameda, 2015
Omphalotropis antelmei E.H. Madge, 1946
Omphalotropis arbusculae E. Fischer-Piette, F. Blanc& F. Salvat, 1969
Balambania aries (FOSSIL) (O.F. von Möllendorff,1890 †)
Omphalotropis aurantiaca G.P. Deshayes, 1855
Assiminea aurifera H.B. Preston, 1912
Metassiminea australis K.H.J. Thiele, 1927
Assiminea avilai J.J. Van Aartsen, 2008
Dominamaria beauforti W.S.S. Van Benthem-Jutting,1963
Taiwanassiminea bedaliensis (B. Rensch, 1934)
Assiminea beddomiana G. Nevill, 1881
Assiminea bella Kuroda, 1958
Garrettia biangulata (W.H. Pease, 1865)
Omphalotropis bifilaris A. Mousson, 1865
Assiminea blanfordi R.T. Abbott, 1958
Assiminea boettgeri R.T. Abbott, 1958
Atropis boraborensis (H.W.L. Dorhn, 1859)
Assiminea bragai A. Nobre, 1937
Duritropis brenchleyi (E.R. Sykes, 1900)
Assiminea brevicula (L. Pfeiffer, 1855)
Assiminea bridgesi L. Pfeiffer, 1855