Allogona (Dysmedoma) townsendiana (I. Lea, 1838) represented as Allogona townsendiana (I. Lea, 1838) (basis of record)
Allogona lombardii A. G. Smith, 1943 (basis of record)
Allogona ptychophora (A. D. Brown, 1870) (basis of record)
Allogona townsendiana (I. Lea, 1838) (basis of record)
Ammonitella yatesii J. G. Cooper, 1868 (basis of record)
Ammonitella yatesii allyni E. P. Chace, 1951 (basis of record)
Ammonitella yatesii yatesii J. G. Cooper, 1868 (basis of record)
Amnicola clarkei Pilsbry, 1917 (basis of record)
Anadenulus cockerelli (Hemphill, 1890) (basis of record)
Ancotrema sportella (A. Gould, 1846) (basis of record)
Ancotrema sportella sinkyonum B. Roth, 1990 (basis of record)
Ancotrema sportella sportella (A. Gould, 1846) (basis of record)
Ancotrema voyanum (Newcomb, 1865) (basis of record)
Ancotrema voyanum humboldtense Pilsbry, 1946 (basis of record)
Ancotrema voyanum voyanum (Newcomb, 1865) (basis of record)
Ancotrema zopherum B. Roth, 1990 (basis of record)
Anguispira alabama (G. H. Clapp, 1920) (basis of record)
Anguispira alternata (Say, 1817) (basis of record)
Anguispira cumberlandiana (I. Lea, 1840) (basis of record)
Anguispira cumberlandiana columba (G. H. Clapp, 1920) (basis of record)
Anguispira cumberlandiana cumberlandiana (I. Lea, 1840) (basis of record)
Anguispira fergusoni (Bland, 1862) (basis of record)
Anguispira jessica Kutchka, 1938 (basis of record)
Anguispira knoxensis (Pilsbry, 1901) (basis of record)
Anguispira macneilli B. Walker, 1928 (basis of record)
Anguispira mordax (Shuttleworth, 1852) (basis of record)
Anguispira nimapuna H. B. Baker, 1932 (basis of record)
Anguispira picta (G. H. Clapp, 1920) (basis of record)
Anguispira rugoderma Hubricht, 1938 (basis of record)
Anguispira strongylodes (Reeve, 1854) (basis of record)
Angustipes ameghini (Gambetta, 1923) (basis of record)
Aphaostracon chalarogyrum F. G. Thompson, 1968 (basis of record)
Aphaostracon hypohyalinum F. G. Thompson, 1968 (basis of record)
Aphaostracon pachynotum F. G. Thompson, 1968 (basis of record)
Aphaostracon pycnum F. G. Thompson, 1968 (basis of record)
Aphaostracon rhadinum F. G. Thompson, 1968 (basis of record)
Aphaostracon theiocrenetum F. G. Thompson, 1968 (basis of record)
Appalachina chilhoweensis (J. Lewis, 1871) (basis of record)
Appalachina sayana sayana (Pilsbry & Ferriss, 1906) (basis of record)
Ariolimax buttoni (Pilsbry & Vanatta, 1896) (basis of record)
Ariolimax californicus J. G. Cooper, 1872 (basis of record)
Ariolimax californicus californicus J. G. Cooper, 1872 (basis of record)
Ariolimax dolichophallus Mead, 1943 (basis of record)
Ariolimax stramineus Hemphill, 1891 (basis of record)
Armiger exigua A. B. Leonard, 1972 accepted as Armiger crista (Linnaeus, 1758) (basis of record)
Ashmunella altissima (T. D. A. Cockerell, 1898) (basis of record)
Ashmunella amblya Pilsbry, 1940 (basis of record)
Ashmunella amblya cornudasensis Vagvolgyi, 1974 (basis of record)
Ashmunella angulata Pilsbry, 1905 (basis of record)
Ashmunella animasensis Vagvolgyi, 1974 (basis of record)
Ashmunella ashmuni (Dall, 1897) (basis of record)
Ashmunella auriculata Vagvolgyi, 1974 (basis of record)
Ashmunella bequaerti Clench & W. B. Miller, 1966 (basis of record)
Ashmunella binneyi Pilsbry & Ferriss, 1917 (basis of record)
Ashmunella carlsbadensis Pilsbry, 1932 (basis of record)
Ashmunella chiricahuana (Dall, 1896) (basis of record)
Ashmunella cockerelli Pilsbry & Ferriss, 1917 (basis of record)
Ashmunella cockerelli argenticola Pilsbry & Ferriss, 1917 (basis of record)
Ashmunella cockerelli perobtusa Pilsbry & Ferriss, 1917 (basis of record)
Ashmunella danielsi Pilsbry & Ferriss, 1915 (basis of record)
Ashmunella danielsi dispar Pilsbry & Ferriss, 1915 (basis of record)
Ashmunella edithae Pilsbry & Cheatum, 1951 (basis of record)
Ashmunella esuritor Pilsbry, 1905 (basis of record)
Ashmunella ferrissi Pilsbry, 1905 (basis of record)
Ashmunella harrisi Metcalf & Smartt, 1977 (basis of record)
Ashmunella hawleyi Metcalf, 1973 (basis of record)
Ashmunella jamesensis Metcalf, 1973 (basis of record)
Ashmunella kochii G. H. Clapp, 1908 (basis of record)
Ashmunella kochii caballoensis Vagvolgyi, 1974 (basis of record)
Ashmunella kochii kochii G. H. Clapp, 1908 (basis of record)
Ashmunella kochii sanandresensis Vagvolgyi, 1974 (basis of record)
Ashmunella lenticula Gregg, 1953 (basis of record)
Ashmunella lepiderma Pilsbry & Ferriss, 1910 (basis of record)
Ashmunella levettei (Bland, 1882) (basis of record)
Ashmunella levettei angigyra Pilsbry, 1905 (basis of record)
Ashmunella levettei bifurca Pilsbry & Ferriss, 1909 (basis of record)
Ashmunella levettei heterodonta Pilsbry, 1905 (basis of record)
Ashmunella macromphala Vagvolgyi, 1974 (basis of record)
Ashmunella mearnsii (Dall, 1895) (basis of record)
Ashmunella mendax Pilsbry & Ferriss, 1917 (basis of record)
Ashmunella miorhyssa (Dall, 1898) (basis of record)
Ashmunella mogollonensis Pilsbry, 1905 (basis of record)
Ashmunella mudgei Cheatum, 1971 (basis of record)
Ashmunella organensis Pilsbry, 1936 (basis of record)
Ashmunella pasonis (Drake, 1951) (basis of record)
Ashmunella pasonis polygyroidea Vagvolgyi, 1974 (basis of record)
Ashmunella pilsbryana Ferriss, 1914 (basis of record)
Ashmunella proxima Pilsbry, 1905 (basis of record)
Ashmunella proxima emigrans Pilsbry & Ferriss, 1910 (basis of record)
Ashmunella proxima fissidens Pilsbry, 1905 (basis of record)
Ashmunella pseudodonta (Dall, 1897) (basis of record)
Ashmunella rhyssa (Dall, 1897) (basis of record)
Ashmunella rileyensis Metcalf & Hurley, 1971 (basis of record)
Ashmunella ruidosana Metcalf, 1973 (basis of record)
Ashmunella salinasensis Vagvolgyi, 1974 (basis of record)
Ashmunella sprouli R. W. Fullington & K. E. Fullington, 1978 (basis of record)
Ashmunella tegillum Metcalf, 1973 (basis of record)
Ashmunella tetrodon Pilsbry & Ferriss, 1915 (basis of record)
Ashmunella tetrodon animorum Pilsbry & Ferriss, 1917 (basis of record)
Ashmunella tetrodon fragilis Pilsbry & Ferriss, 1917 (basis of record)