Coccoderma abbreviata (A.R.J.B. Bavay& P. Dautzenberg, 1915)
Mastus abundans W.J.M. Maassen, 1995
Euchondrus acutior (W.A. Lindholm, 1922)
Euchondrus adwani E. Neubert & Amr, 2016
Pseudonapaeus agassizzii (H. Milne-Edwards, 1880)
Buliminus akkumensis E. Gittenberger& H.P.M.G. Menkhorst, 1991
Napaeus alabastrinus A.M. de F. Martins, 1989
Pseudonapaeus albiplicatus (E.C. Von Martens, 1874)
Mastoides albocostatus (C.A. Westerlund, 1896)
Asuranena albolimbata (W.A. Lindholm, 1927)
Napaeus alboreflexus C.M.F. Ancey, 1882
Turanena albrechti W. Rähle, 1988
Euchondrus albulus A. Mousson
Rachistia aldabra Unknown
Buliminus alepensis (L. Pfeiffer, 1841)
Buliminus alepensis marsabensis C.A. Westerlund, 1887
Jaminia alpicola M. von Kimakowicz, 1890
Imparietula altenai E. Gittenberger, 1967
Napaeus alucensis J. Santana & Y. Yanes,2011
Mastus amenazada F.W. Welter-Schultes,1999
Mirus andersonianus (O.F. von Möllendorff,1885)
Akramovskiella andronakii (W.A. Lindholm, 1913)
Pseudonapaeus aptychus (C.M.F. Ancey, 1886)
Napaeus arinagaensis M. Artiles, F. Déniz& J.C. Martin, 2011
Napaeus armandi C.M.F. Ancey, 1882
Napaeus armandi major C.M.F. Ancey, 1882
Chondrula armeniaca C.M.F. Ancey, 1880
Imparietula armeniaca (L.L.G. de Mortillet,1854)
Zebrina armenica (G. Nägele, 1903)
Palaeomastus arneggensis (FOSSIL) (Miller, 1907) †
Subzebinus asaphes (R. Sturany, 1900)
Subzebinus asaphes brevior (R. Sturany, 1900)
Pseudonapaeus asiaticus (E.C. Von Martens, 1881)
Mastus athensis (L. Pfeiffer, 1847)
Mastus athensis jaczewskii (A.J. Wagner, 1928)