Abyssochrysidae Tomlin, 1927 (basis of record)
Abyssochrysoidea Tomlin, 1927 (basis of record)
Aclididae G. O. Sars, 1878 accepted as Eulimidae R. A. Philippi, 1853 (basis of record)
Acmaeidae Forbes, 1850 (basis of record)
Acteonoidea d'Orbigny, 1842 (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)
Aeolidida accepted as Aeolidioidea Gray, 1827 (basis of record)
Aeolidiidae Gray, 1827 (basis of record)
Akeridae Mazzarelli, 1891 (additional source)
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)
Ancylidae Rafinesque, 1815 accepted as Ancylinae Rafinesque, 1815 (status source)
Aplustridae Gray, 1847 (basis of record)
Aplysiidae Lamarck, 1809 (additional source)
Aplysiomorpha accepted as Aplysiida (additional source)
Aporrhaidae Gray, 1850 (additional source)
Archidorididae Bergh, 1891 accepted as Dorididae Rafinesque, 1815 (additional source)
Architectibranchia represented as [unassigned] Heterobranchia (basis of record)
Arminidae Iredale & O'Donoghue, 1923 (1841) (basis of record)
Assimineidae H. Adams & A. Adams, 1856 (basis of record)
Austrocypraeini Iredale, 1935 (basis of record)
Barleeiidae Gray, 1857 (basis of record)
Bistolidini C. P. Meyer, 2003 (basis of record)
Bornellidae Bergh, 1874 (basis of record)
Bullidae Gray, 1827 (source of synonymy)
Cadlinidae Bergh, 1891 (basis of record)
Caenogastropoda (basis of record)
Calliostomatinae Thiele, 1924 (1847) (basis of record)
Calliostomatini Thiele, 1924 (1847) accepted as Calliostomatinae Thiele, 1924 (1847) (basis of record)
Calyptraeidae Lamarck, 1809 (basis of record)
Calyptraeoidea Lamarck, 1809 (basis of record)
Campaniloidea (basis of record)
Campaniloidea (taxonomy source)
Cancellariinae Forbes & Hanley, 1851 (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)
Cassoidea accepted as Tonnoidea Suter, 1913 (1825) (basis of record)
Cavolinioidea 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)
Cerithiopsoidea accepted as Triphoroidea Gray, 1847 (basis of record)
Charcotiidae Odhner, 1926 accepted as Curnonidae d'Udekem d'Acoz, 2017 (basis of record)
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 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)
Cocculinellidae Moskalev, 1971 (basis of record)
Cocculinidae Dall, 1882 (basis of record)
Cocculinoidea Dall, 1882 (basis of record)
Cochlespiridae Powell, 1942 (basis of record)
Conidae J. Fleming, 1822 (basis of record)
Conoidea J. Fleming, 1822 (basis of record)
Conorbidae De Gregorio, 1880 (additional source)
Coralliophilidae Chenu, 1859 accepted as Coralliophilinae Chenu, 1859 (source of synonymy)
Coralliophilinae Chenu, 1859 (basis of record)
Coryphellidae Bergh, 1889 (basis of record)
Crepidulidae J. Fleming, 1822 accepted as Calyptraeidae Lamarck, 1809 (source of synonymy)
Crepiduloidea J. Fleming, 1822 accepted as Calyptraeoidea Lamarck, 1809 (additional source)
Cumanotidae Odhner, 1907 (basis of record)
Cuthonidae Odhner, 1934 (basis of record)
Cylichnidae H. Adams & A. Adams, 1854 (basis of record)
Cylindromitrinae Cossmann, 1899 (basis of record)
Cymatiinae Iredale, 1913 (1854) accepted as Cymatiidae Iredale, 1913 (additional source)
Cymbiinae H. Adams & A. Adams, 1853 (1847) (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)
Cypraeovulini Schilder, 1927 accepted as Cypraeovulinae F. A. Schilder, 1927 (basis of record)
Dendrodorididae O'Donoghue, 1924 (1864) (basis of record)
Desmopteridae Chun, 1889 (basis of record)
Dialidae Kay, 1979 (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)
Diastomatidae Cossmann, 1894 (basis of record)
Discodorididae Bergh, 1891 (basis of record)
Dolabriferidae accepted as Dolabriferinae Pilsbry, 1895 represented as Aplysiidae Lamarck, 1809 (basis of record)
Dorididae Rafinesque, 1815 (additional source)
Doridoidea Rafinesque, 1815 (basis of record)
Doridoidei (basis of record)
Doridoxidae Bergh, 1899 (basis of record)
Doridoxoidea Bergh, 1899 (basis of record)
Dotidae Gray, 1853 (basis of record)
Drilliidae Olsson, 1964 (basis of record)
Eatoniellidae Ponder, 1965 (basis of record)
Elachisinidae Ponder, 1985 (basis of record)