Polygyra acutedentata (W.G. Binney, 1858) Mexico, Sinaloa9 mm
Triodopsis alabamensis H.A. Pilsbry, 1902 Alabama
Linisia albicostulata (H.A. Pilsbry, 1896) Mexico, Nayarit
Neohelix albolabris (T. Say, 1817) USA, North Carolina27 mm
Neohelix albolabris alleni (F.A. Sampson, 1883) Missouri26,5 mm
Stenotrema altispira H.A. Pilsbry, 1894 Tennessee
Akromesodon altivagus (H.A. Pilsbry, 1900) USA, North Carolina
Ashmunella amblya H.A. Pilsbry, 1940
Praticolella ampla (L. Pfeiffer, 1866) Veracruz, Mexico
Mesodon andrewsae W.G. Binney, 1879 Tennessee
Stenotrema angellum L.R. Hubricht, 1958 Kentucky, Jessamine County
Linisia anilis (W.M. Gabb, 1865) Mexico, Sonora
Ashmunella animasensis J. Vagvolgyi, 1974
Triodopsis anteridon H.A. Pilsbry, 1940 Tennessee
Mesodon appressus (T. Say, 1821) Tennessee, Crossville17 mm
Inflectarius approximans (W.F. Clapp, 1905) Alabama
Fumonelix archeri (H.A. Pilsbry, 1940) Tennessee
Linisia ariadnae (L. Pfeiffer, 1848) Mexico, Matamoros
Vespericola armigera (C.M.F. Ancey, 1881) California12 mm
Ashmunella ashmuni (W.H. Dall, 1897) New Mexico, Santa Fe
Linisia aulacomphala (H.A. Pilsbry& A. Hinkley, 1907) Mexico, Tampico
Polygyra auriculata T. Say, 1818 Florida10,9 mm
Daedalochila auriformis T.B. Bland, 1859 Alabama
Daedalochila avara (T. Say, 1818) Florida5,9 mm
Praticolella bakeri E.G. Vanatta, 1915 Florida
Polygyra barbata W.F. Clapp, 1904
Stenotrema barbigerum J.H. Redfield, 1856 Alabama
Linisia behri (W.M. Gabb, 1865) Mexico, Guaymas Sonora
Ashmunella bequaerti W.J. Clench& W.B. Miller, 1966 USA, Texas
Praticolella berlandieriana (S. Moricand, 1833) Mexico, Monterrey11,8 mm
Linisia bicruris (L. Pfeiffer, 1857) Mexico, Nayarit
Patera binneyana H.A. Pilsbry, 1899 Arkansas
Ashmunella binneyi H.A. Pilsbry& J.H. Ferriss, 1917
Stenotrema blandianum H.A. Pilsbry, 1903 Missouri
Stenotrema brevipila W.F. Clapp, 1907 Alabama