Perrottetia aberrata (L.F.A. Souleyet, 1852) Vietnam, Da Nang
Streptartemon abunaensis (F.C. Baker, 1913) Brazil9 mm
Raffraya acicula (P.M.A. Morelet, 1877)
Parvedentulina acutapex K.C. Emberton& T.A. Pearce, 2000 Madagascar
Oophana acuticarinata W.S.S. Van Benthem-Jutting, 1961 Malaysia11 mm
Gulella adamsiana (L. Pfeiffer, 1859)
Ptychotrema aequatoriale (H.A. Pilsbry, 1919) Nigeria
Edentulina affinis C.R. Böttger, 1913 Congo, Pointe Noire40 mm
Discartemon afthonodontia T. Siriboon & S. Panha,2014 Thailand, Chumphon
Gulella albersi (L. Pfeiffer, 1854)
Gulella alleni B. Verdcourt, 1974 Tanzania
Gulella alutacea T. Kira, 1955 South Africa, KwaZulu, Natal8 mm
Streptaxis alveus (R.W. Dunker, 1845) Guyana19 mm
Gulella amaniensis B. Verdcourt, 1953 Tanzania
Gulella ambalaniranae K.C. Emberton, 2001
Gulella ambanikelia K.C. Emberton, 2001
Parvedentulina ambatomitatoae K.C. Emberton, 2002 Madagascar
Parvedentulina ambatosorotrae K.C. Emberton, 2002 Madagascar
Gulella ambatovakiae K.C. Emberton, 2001 Madagascar
Parvedentulina ambatovakiae K.C. Emberton, 2002 Madagascar
Gulella ambodipelomosiae K.C. Emberton, 2002 Madagascar
Edentulina ambongoaboae K.C. Emberton, 1999 Madagascar
Gulella amboniensis P. Tattersfield, 1998 Tanzania, Tanga
Edentulina ambra K.C. Emberton, 1999 Madagascar
Edentulina analamerae (K.C. Emberton, 1999) Madagascar, Analamera Reserve
Haploptychius anceyi (J.F. Mabille, 1887) Vietnam, Tonkin
Haploptychius andamanicus (W.H. Benson, 1860)
Parvedentulina andapae K.C. Emberton, 2002 Madagascar
Parvedentulina andavakoerae K.C. Emberton, 2002 Madagascar
Gulella andreana E. Fischer-Piette, Ch.P. Blanc& D. Vukadinovic, 1974 Madagascar
Gulella andriantanteliae K.C. Emberton, 2010 Madagascar, Andriantantely
Parvedentulina andriantanteliae K.C. Emberton, 2010
Parvedentulina andringitrae K.C. Emberton, 2002 Madagascar
Tayloria angustistriata L. Pfeiffer
Haploptychius anhduongae Thach, 2017