• Aaleniella umbriensis M. A. Conti & J. C. Fischer, 1981 †
• Aaleniella variata M. A. Conti & J. C. Fischer, 1981 †
• Aclisina (Rhabdospira) compacta Donald, 1898 † (uncertain > unassessed)
• Aclisina (Rhabdospira) selkirkii Donald, 1898 † (uncertain > unassessed)
• Aclisina aciculata Donald, 1898 † (uncertain > unassessed)
• Aclisina attenuata Donald, 1898 † (uncertain > unassessed)
• Aclisina elegantula Donald, 1898 † (uncertain > unassessed)
• Aclisina longissima Whidborne, 1896 † (uncertain > unassessed)
• Aclisina metula X.-D. Qiao, 1983 †
• Aclisina parvula Donald, 1898 † (uncertain > unassessed)
• Aclisina pusilla Donald, 1898 † (uncertain > unassessed)
• Aclisina quadrata Donald, 1898 † (uncertain > unassessed)
• Aclisina similis Donald, 1898 † (uncertain > unassessed)
• Aclisina striatula (de Koninck, 1843) †
• Aclisina tenuistriata Donald, 1898 † (uncertain > unassessed)
• Aclisina terebra Donald, 1898 † (uncertain > unassessed)
• Acremodonta crassicosta (A. W. B. Powell, 1937)
• Acremodontina alazon (Hedley, 1905)
• Acremodontina atypica (A. W. B. Powell, 1937)
• Acremodontina balcombiana B. A. Marshall, 1995 †
• Acremodontina boucheti B. A. Marshall, 1995
• Acremodontina carinata (A. W. B. Powell, 1940)
• Acremodontina kermadecensis B. A. Marshall, 1995
• Acremodontina magna B. A. Marshall, 1995
• Acremodontina maxwelli B. A. Marshall, 1995 †
• Acremodontina poutama (E. C. Smith, 1962)
• Acremodontina simplex (A. W. B. Powell, 1937)
• Acremodontina translucida (May, 1915)
• Acremodontina varicosa B. A. Marshall, 1995
• Acutitomaria kustatscherae Karapunar & Nützel, 2021 †
• Acutitomaria woehrmanni (Koken, 1896) †
• Addisonia brophyi J. H. McLean, 1985
• Addisonia enodis Simone, 1996
• Addisonia excentrica (Tiberi, 1855)
• Addisonia gunyoungensis (Chapman & Gabriel, 1923) †
• Addisonia salisburyensis (Ludbrook, 1956) †
• Adeorbisina canavarii Greco, 1899 †
• Adeuomphalus ammoniformis G. Seguenza, 1876
• Adeuomphalus axistriatus L. Hoffman, Gofas & Freiwald, 2020
• Adeuomphalus bandeli (M. Schröder, 1995) †
• Adeuomphalus collinsi Kano, Chikyu & Warén, 2009
• Adeuomphalus crenulatus (A. W. B. Powell, 1937)
• Adeuomphalus curvistriatus L. Hoffman, Gofas & Freiwald, 2020
• Adeuomphalus densicostatus (Jeffreys, 1884)
• Adeuomphalus diegoalejandroi Fernández-Garcés, Rubio & Rolán, 2019
• Adeuomphalus elegans Kano, Chikyu & Warén, 2009
• Adeuomphalus guillei Kano, Chikyu & Warén, 2009
• Adeuomphalus misaeli Fernández-Garcés, Rubio & Rolán, 2019
• Adeuomphalus neozelanica (Suter, 1908)
• Adeuomphalus orientalis (Thiele, 1925)
• Adeuomphalus sinuosus (Sykes, 1925)
• Adeuomphalus trochanter Warén & Bouchet, 2001
• Adeuomphalus valentinae Fernández-Garcés, Rubio & Rolán, 2019
• Adeuomphalus xerente Absalão, 2009
• Aechmospira norma X.-D. Qiao, 1983 †
• Aenigmabonus kurilokamtschaticus Moskalev, 1978
• Aequispirella bifurcata (P. A. Maxwell, 1992) †
• Aequispirella corula (F. W. Hutton, 1885)
• Aequispirella enderbyensis (A. W. B. Powell, 1931)
• Aequispirella finlayi (A. W. B. Powell, 1933)
• Aequispirella iredalei (H. J. Finlay, 1924) †
• Aequispirella kaawaensis (Laws, 1940) †
• Aequispirella tenuilirata (H. J. Finlay, 1924) †
• Afrollonia nigeriensis Adegoke, 1977 †
• Afrollonia vilcassina Pacaud, 2017 †
• Agagus agagus Jousseaume, 1894
• Agagus stellamaris D. G. Herbert, 1991
• Agariste compressa (Cantraine, 1835) †
• Agariste juliencilisi Landau, Marquet & Grigis, 2003 †
• Agariste phrygium (D. G. Herbert & Kilburn, 1986)
• Agathistoma antiqua S. N. Nielsen, Frassinetti & Bandel, 2004 †
• Agathistoma bergeroni (J. H. McLean, 1970)
• Agathistoma cooksoni (E. A. Smith, 1877)
• Agathistoma cortezianum (J. H. McLean, 1970)
• Agathistoma corvus (R. A. Philippi, 1850)
• Agathistoma eiseni (E. K. Jordan, 1936)
• Agathistoma fasciatum (Born, 1778)
• Agathistoma felipense (J. H. McLean, 1970)
• Agathistoma globulum (P. P. Carpenter, 1857)
• Agathistoma gruneri (R. A. Philippi, 1849)
• Agathistoma hotessierianum (A. d'Orbigny, 1842)
• Agathistoma ligulatum (Menke, 1851)
• Agathistoma ligulatum ligulatum (Menke, 1851)
• Agathistoma ligulatum mariamadrae (Pilsbry & H. N. Lowe, 1932)
• Agathistoma lividomaculatum (C. B. Adams, 1845)
• Agathistoma marianum (Dall, 1919)
• Agathistoma melaleucos (Jonas, 1844)
• Agathistoma nordestinum Dornellas, Graboski, Hellberg & Lotufo, 2021
• Agathistoma panamense (R. A. Philippi, 1849)
• Agathistoma panistostum (DeVries, 2007) †
• Agathistoma patagonicum (A. d'Orbigny, 1838)
• Agathistoma pictum (J. H. McLean, 1970)
• Agathistoma quadricostatum (W. Wood, 1828)
• Agathistoma snodgrassi (Pilsbry & Vanatta, 1902)
• Agathistoma tridentatum (Potiez & Michaud, 1838)
• Agathistoma verdispirum (J. H. McLean, 1970)
• Agathistoma verrucosum (J. H. McLean, 1970)
• Agathistoma viridulum (Gmelin, 1791)
• Agathodonta africana (Rennie, 1930) †
• Agathodonta dentigera (A. d'Orbigny, 1842) †