Acroloxidae Thiele, 1931 (basis of record)
Acroloxoidea Thiele, 1931 accepted as Lymnaeoidea Rafinesque, 1815 (basis of record)
Ampullarioidea Gray, 1824 (basis of record)
Ancylus (Ancylastrum) Bourguignat, 1853 accepted as Ancylastrum Bourguignat, 1853 (status source)
Assimineidae H. Adams & A. Adams, 1856 (basis of record)
Bithyniidae J. E. Gray, 1857 (basis of record)
Caenogastropoda (basis of record)
Cavolinioidea J. E. Gray, 1850 (1815) (basis of record)
Cerithiidae J. Fleming, 1822 (basis of record)
Cerithiinae J. Fleming, 1822 (basis of record)
Cerithioidea J. Fleming, 1822 (additional source)
Clausiliidae J. E. Gray, 1855 (basis of record)
Clivunellidae Kochansky-Devidé & Slišković, 1972 † (basis of record)
Cochliopidae Tryon, 1866 (basis of record)
Cyclophoroidea J. E. Gray, 1847 (basis of record)
Ekadantinae Thiele, 1929 (basis of record)
Elachisinidae Ponder, 1985 (basis of record)
Epitoniidae S. S. Berry, 1910 (1812) (additional source)
Epitonioidea S. S. Berry, 1910 (1812) (basis of record)
Eupulmonata (basis of record)
Gastropoda (basis of record)
Helicidae Rafinesque, 1815 (basis of record)
Hydrobiidae W. Stimpson, 1865 (status source)
Hydrobiinae W. Stimpson, 1865 (basis of record)
Hygrophila (basis of record)
Iravadiidae Thiele, 1928 (basis of record)
Lithoglyphidae Tryon, 1866 (basis of record)
Littorinidae Children, 1834 (basis of record)
Littorinimorpha (basis of record)
Littorinoidea Children, 1834 (basis of record)
Lymnaeidae Rafinesque, 1815 (basis of record)
Melaniidae Children, 1823 accepted as Thiaridae Gill, 1871 (1823) (basis of record)
Melanopsidae H. Adams & A. Adams, 1854 (basis of record)
Muricoidea Rafinesque, 1815 (basis of record)
Neritinae Rafinesque, 1815 (basis of record)
Neritininae Poey, 1852 (basis of record)
Pachychilidae P. Fischer & Crosse, 1892 (basis of record)
Paludomidae Stoliczka, 1868 (basis of record)
Paludominae Stoliczka, 1868 (basis of record)
Physidae Fitzinger, 1833 (basis of record)
Planorbidae Rafinesque, 1815 (additional source)
Pomatiidae R. B. Newton, 1891 (1828) (basis of record)
Pomatiopsidae W. Stimpson, 1865 (basis of record)
Pyramidellidae J. E. Gray, 1840 (basis of record)
Rissoidae Gray, 1847 (basis of record)
Rissooidea Gray, 1847 (basis of record)
Smaragdiinae H. B. Baker, 1923 accepted as Neritinae Rafinesque, 1815 (basis of record)
Stenothyridae Tryon, 1866 (basis of record)
Succineidae H. Beck, 1837 (basis of record)
Thiaridae Gill, 1871 (1823) (basis of record)
Tornidae Sacco, 1896 (1884) (basis of record)
Trochoidea Rafinesque, 1815 (additional source)
Truncatellidae J. E. Gray, 1840 (additional source)
Turbinidae Rafinesque, 1815 (additional source)
Turbonillinae Bronn, 1849 (additional source)
Valencienniinae Gorjanović-Kramberger, 1923 † (basis of record)
Viviparidae J. E. Gray, 1847 (basis of record)
Viviparoidea Gray, 1847 (basis of record)