Coccoderma abbreviata (A.R.J.B. Bavay& P. Dautzenberg, 1915) Vietnam, Tonkin
Mastus abundans W.J.M. Maassen, 1995 Greece
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 Turkey
Napaeus alabastrinus A.M. de F. Martins, 1989 Azores
Pseudonapaeus albiplicatus (E.C. Von Martens, 1874) Kazakhstan
Mastoides albocostatus (C.A. Westerlund, 1896) Kirghizistan, Jalal-Abad
Asuranena albolimbata (W.A. Lindholm, 1927) Uzbekistan
Napaeus alboreflexus C.M.F. Ancey, 1882 China, Xinjiang
Turanena albrechti W. Rähle, 1988 Turkey
Euchondrus albulus A. Mousson
Rachistia aldabra Unknown Aldabra Atoll
Buliminus alepensis (L. Pfeiffer, 1841) Armenia
Buliminus alepensis marsabensis C.A. Westerlund, 1887 Israel16 mm
Jaminia alpicola M. von Kimakowicz, 1890 Romania
Imparietula altenai E. Gittenberger, 1967 Turkey
Napaeus alucensis J. Santana & Y. Yanes,2011 Canary Islands
Mastus amenazada F.W. Welter-Schultes,1999 Greece, Crete Island
Mirus andersonianus (O.F. von Möllendorff,1885) Hokkaido
Akramovskiella andronakii (W.A. Lindholm, 1913) Turkey11,2 mm
Pseudonapaeus aptychus (C.M.F. Ancey, 1886) Kyrgyzstan
Napaeus arinagaensis M. Artiles, F. Déniz& J.C. Martin, 2011 Canary Islands, Gran Canaria1 mm
Napaeus armandi C.M.F. Ancey, 1882 China, Xinjiang
Napaeus armandi major C.M.F. Ancey, 1882 China, Xinjiang
Chondrula armeniaca C.M.F. Ancey, 1880 Turkey
Imparietula armeniaca (L.L.G. de Mortillet,1854) Turkey
Zebrina armenica (G. Nägele, 1903) Armenia
Palaeomastus arneggensis (FOSSIL) (Miller, 1907) †
Subzebinus asaphes (R. Sturany, 1900) China, Gansu Province23,6 mm
Subzebinus asaphes brevior (R. Sturany, 1900) China23 mm
Pseudonapaeus asiaticus (E.C. Von Martens, 1881) Kyrgyzstan10,8 mm
Mastus athensis (L. Pfeiffer, 1847) Greece, Mount Athos
Mastus athensis jaczewskii (A.J. Wagner, 1928) North Turkey