Polygyra acutedentata (W.G. Binney, 1858)
Triodopsis alabamensis H.A. Pilsbry, 1902
Linisia albicostulata (H.A. Pilsbry, 1896)
Neohelix albolabris (T. Say, 1817)
Neohelix albolabris alleni (F.A. Sampson, 1883)
Stenotrema altispira H.A. Pilsbry, 1894
Akromesodon altivagus (H.A. Pilsbry, 1900)
Ashmunella amblya H.A. Pilsbry, 1940
Praticolella ampla (L. Pfeiffer, 1866)
Mesodon andrewsae W.G. Binney, 1879
Stenotrema angellum L.R. Hubricht, 1958
Linisia anilis (W.M. Gabb, 1865)
Ashmunella animasensis J. Vagvolgyi, 1974
Triodopsis anteridon H.A. Pilsbry, 1940
Mesodon appressus (T. Say, 1821)
Inflectarius approximans (W.F. Clapp, 1905)
Fumonelix archeri (H.A. Pilsbry, 1940)
Linisia ariadnae (L. Pfeiffer, 1848)
Vespericola armigera (C.M.F. Ancey, 1881)
Ashmunella ashmuni (W.H. Dall, 1897)
Linisia aulacomphala (H.A. Pilsbry & A. Hinkley,1907)
Polygyra auriculata T. Say, 1818
Daedalochila auriformis T.B. Bland, 1859
Daedalochila avara (T. Say, 1818)
Praticolella bakeri E.G. Vanatta, 1915
Polygyra barbata W.F. Clapp, 1904
Stenotrema barbigerum J.H. Redfield, 1856
Linisia behri (W.M. Gabb, 1865)
Ashmunella bequaerti W.J. Clench & W.B. Miller,1966
Praticolella berlandieriana (S. Moricand, 1833)
Linisia bicruris (L. Pfeiffer, 1857)
Patera binneyana H.A. Pilsbry, 1899
Ashmunella binneyi H.A. Pilsbry & J.H. Ferriss,1917
Stenotrema blandianum H.A. Pilsbry, 1903
Stenotrema brevipila W.F. Clapp, 1907