Aclididae G. O. Sars, 1878 accepted as Eulimidae R. A. Philippi, 1853 (basis of record)
Acmaeidae Forbes, 1850 (basis of record)
Acroloxidae Thiele, 1931 (basis of record)
Acroloxoidea Thiele, 1931 accepted as Lymnaeoidea Rafinesque, 1815 (basis of record)
Acteonoidea A. d'Orbigny, 1842 (basis of record)
Addisoniidae Dall, 1882 (basis of record)
Addisoniinae Dall, 1882 (basis of record)
Adeorbidae Monterosato, 1884 accepted as Tornidae Sacco, 1896 (1884) (basis of record)
Admetinae Troschel, 1865 (status source)
Aegiretidae P. Fischer, 1883 accepted as Aegiridae P. Fischer, 1883 (additional source)
Aeolidiacea accepted as Aeolidioidea Gray, 1827 (basis of record)
Aeolidida accepted as Aeolidioidea Gray, 1827 (basis of record)
Aeolidiidae Gray, 1827 (basis of record)
Akeridae Mazzarelli, 1891 (additional source)
Alderiidae Pruvot-Fol, 1954 accepted as Limapontiidae Gray, 1847 (source of synonymy)
Ampullinidae Cossmann, 1919 (basis of record)
Ampullospiridae L. R. Cox, 1930 † accepted as Ampullinidae Cossmann, 1919 (source of synonymy)
Anatomidae J. H. McLean, 1989 (basis of record)
Anculinae Pruvot-Fol, 1954 (basis of record)
Aplysiidae Lamarck, 1809 (additional source)
Aplysiinae Lamarck, 1809 represented as Aplysiidae Lamarck, 1809 (basis of record)
Aporrhaidae J. E. Gray, 1850 (additional source)
Aporrhaiidae accepted as Aporrhaidae J. E. Gray, 1850 (additional source)
Archidorididae Bergh, 1891 accepted as Dorididae Rafinesque, 1815 (additional source)
Arminidae Iredale & O'Donoghue, 1923 (1841) (basis of record)
Asperspinidae Rankin, 1979 (basis of record)
Assimineidae H. Adams & A. Adams, 1856 (basis of record)
Barleeiidae J. E. Gray, 1857 (basis of record)
Bithyniidae J. E. Gray, 1857 (basis of record)
Cadlinidae Bergh, 1891 (basis of record)
Caecinae J. E. Gray, 1850 (basis of record)
Caenogastropoda (basis of record)
Calliostomatinae Thiele, 1924 (1847) (basis of record)
Calmidae Iredale & O'Donoghue, 1923 (basis of record)
Calyptraeidae Lamarck, 1809 (basis of record)
Calyptraeoidea Lamarck, 1809 (basis of record)
Campaniloidea (taxonomy source)
Campaniloidea (basis of record)
Cancellarioidea Forbes & Hanley, 1851 accepted as Volutoidea Rafinesque, 1815 (additional source)
Capulidae J. Fleming, 1822 (additional source)
Carinariidae Blainville, 1818 (additional source)
Cassidae Latreille, 1825 (basis of record)
Cavolinioidea J. E. Gray, 1850 (1815) (basis of record)
Cephalaspidea (basis of record)
Cerithiidae J. Fleming, 1822 (basis of record)
Cerithiinae J. Fleming, 1822 (basis of record)
Cerithioidea J. Fleming, 1822 (additional source)
Chilodontidae Wenz, 1938 accepted as Chilodontaidae Wenz, 1938 (additional source)
Cingulopsidae Fretter & Patil, 1958 (additional source)
Cingulopsoidea Fretter & Patil, 1958 (basis of record)
Clathurellidae H. Adams & A. Adams, 1858 (additional source)
Clavatulidae J. E. Gray, 1853 (basis of record)
Clionidae Rafinesque, 1815 (basis of record)
Clionoidea Rafinesque, 1815 (basis of record)
Cliopsidae O. G. Costa, 1873 (basis of record)
Cocculinidae Dall, 1882 (basis of record)
Cocculinoidea Dall, 1882 (basis of record)
Cochlespiridae A. W. B. Powell, 1942 (basis of record)
Cochliopidae Tryon, 1866 (basis of record)
Conidae J. Fleming, 1822 (basis of record)
Conoidea J. Fleming, 1822 (basis of record)
Coralliophilinae Chenu, 1859 (basis of record)
Corambidae Bergh, 1871 (basis of record)
Coryphellidae Bergh, 1889 (basis of record)
Cumanotidae Odhner, 1907 (basis of record)
Cuthonidae Odhner, 1934 (basis of record)
Cylichnidae H. Adams & A. Adams, 1854 (basis of record)
Cylindrobullidae Thiele, 1931 (basis of record)
Cylindrobulloidea Thiele, 1931 accepted as Oxynooidea Stoliczka, 1868 (1847) (basis of record)
Cymatiinae Iredale, 1913 (1854) accepted as Cymatiidae Iredale, 1913 (additional source)
Cymbuliidae Gray, 1840 (basis of record)
Cymbuliinae Gray, 1840 (basis of record)
Cymbulioidea Gray, 1840 (basis of record)
Cypraeidae Rafinesque, 1815 (basis of record)
Cypraeinae Rafinesque, 1815 (basis of record)
Cypraeini Rafinesque, 1815 (basis of record)
Dendrodorididae O'Donoghue, 1924 (1864) (basis of record)
Diaphanidae Odhner, 1914 (1857) (basis of record)
Diaphaninae Odhner, 1914 (1857) (basis of record)
Diaphanoidea Odhner, 1914 (1857) accepted as Cylichnoidea H. Adams & A. Adams, 1854 (basis of record)
Discodorididae Bergh, 1891 (basis of record)
Dorididae Rafinesque, 1815 (additional source)
Doridoidea Rafinesque, 1815 (basis of record)
Doridoidei (basis of record)
Dotidae Gray, 1853 (basis of record)
Drilliidae Olsson, 1964 (basis of record)
Eburninae Swainson, 1840 accepted as Babyloniidae Kuroda, Habe & Oyama, 1971 (source of synonymy)
Ekadantinae Thiele, 1929 (basis of record)
Elachisinidae Ponder, 1985 (basis of record)
Ellobiinae L. Pfeiffer, 1854 (1822) (basis of record)
Elysiidae Forbes & Hanley, 1851 accepted as Plakobranchidae Gray, 1840 (source of synonymy)
Embletoniidae Pruvot-Fol, 1954 (basis of record)
Epitoniidae S. S. Berry, 1910 (1812) (additional source)
Epitonioidea S. S. Berry, 1910 (1812) (basis of record)
Euctenidiacea accepted as Doridina (basis of record)
Eulimacea accepted as Eulimoidea R. A. Philippi, 1853 accepted as Vanikoroidea Gray, 1840 (basis of record)
Eulimidae R. A. Philippi, 1853 (basis of record)
Eulimoidea R. A. Philippi, 1853 accepted as Vanikoroidea Gray, 1840 (basis of record)
Eumetulinae A. N. Golikov & Starobogatov, 1975 (basis of record)
Eupulmonata (basis of record)