"Lower Heterobranchia" (basis of record)
Achatinoidea Swainson, 1840 (basis of record)
Acteocinidae Dall, 1913 accepted as Tornatinidae P. Fischer, 1883 (source of synonymy)
Aeolidioidea J. E. Gray, 1827 (basis of record)
Amathinidae Ponder, 1987 (basis of record)
Aplysiida (basis of record)
Aplysioidea Lamarck, 1809 (basis of record)
Architaenioglossa (additional source)
Architectonicidae J. E. Gray, 1850 (basis of record)
Architectonicoidea J. E. Gray, 1850 (basis of record)
Arionidae J. E. Gray, 1840 (basis of record)
Arionoidei (basis of record)
Arminoidea Iredale & O'Donoghue, 1923 (1841) (basis of record)
Bellamyinae Rohrbach, 1937 (status source)
Bistolidini C. P. Meyer, 2003 (status source)
Buccinoidea Rafinesque, 1815 (additional source)
Bulloidea J. E. Gray, 1827 (basis of record)
Busyconinae Wade, 1917 (1867) (status source)
Cerithiopsidae H. Adams & A. Adams, 1853 (basis of record)
Chromodorididae Bergh, 1891 (basis of record)
Chromodoridinae Bergh, 1891 (basis of record)
Chromodoridoidea Bergh, 1891 (basis of record)
Cladobranchia (status source)
Cocculinida (status source)
Cochlicellini Schileyko, 1972 (basis of record)
Cochlicopidae Pilsbry, 1900 (1879) (basis of record)
Columbellidae Swainson, 1840 (status source)
Conradiidae A. N. Golikov & Starobogatov, 1987 (basis of record)
Cycloneritida (basis of record)
Cypraeoidea Rafinesque, 1815 (additional source)
Dendronotidae Allman, 1845 (basis of record)
Dendronotoidea Allman, 1845 (basis of record)
Diodorinae Odhner, 1932 accepted as Fissurellideinae Pilsbry, 1890 (basis of record)
Doridina accepted as Doridida (basis of record)
Ellobiida (basis of record)
Ellobiidae L. Pfeiffer, 1854 (1822) (basis of record)
Ellobioidea L. Pfeiffer, 1854 (1822) (basis of record)
Emarginulinae Children, 1834 (basis of record)
Eratoidae T. Gill, 1871 (status source)
Ergalataxinae Kuroda, T. Habe & Oyama, 1971 (basis of record)
Erosariinae F. A. Schilder, 1924 (basis of record)
Erroneinae F. A. Schilder, 1927 (status source)
Erroneini F. A. Schilder, 1927 (status source)
Euconulidae H. B. Baker, 1928 (basis of record)
Euthyneura (basis of record)
Fasciolariidae J. E. Gray, 1853 (additional source)
Favorininae Bergh, 1889 (basis of record)
Fissurellidae J. Fleming, 1822 (basis of record)
Fissurellideinae Pilsbry, 1890 (source of synonymy)
Fissurellinae J. Fleming, 1822 (basis of record)
Fissurelloidea J. Fleming, 1822 (basis of record)
Fossarinae A. Adams, 1860 (basis of record)
Gastrodontoidea Tryon, 1866 (basis of record)
Geomitridae C. R. Boettger, 1909 (basis of record)
Geomitrinae C. R. Boettger, 1909 (basis of record)
Haliotidae Rafinesque, 1815 (basis of record)
Helicellinae Ihering, 1909 (basis of record)
Helicellini Ihering, 1909 (basis of record)
Helicina (basis of record)
Helicoidea Rafinesque, 1815 (basis of record)
Helicoidei (basis of record)
Heterobranchia (basis of record)
Heterobranchia (additional source)
Hipponicidae Troschel, 1861 (basis of record)
Hipponicoidea Troschel, 1861 (basis of record)
Lauriidae Steenberg, 1925 (basis of record)
Limacidae Batsch, 1789 (additional source)
Limacinae Batsch, 1789 (additional source)
Limacoidea Batsch, 1789 (basis of record)
Limacoidei (basis of record)
Lymnaeoidea Rafinesque, 1815 (basis of record)
Mangeliidae P. Fischer, 1883 (status source)
Metaxia Monterosato, 1884 (subsequent type designation)
Miamirinae Bergh, 1891 (basis of record)
Murchisonellidae T. L. Casey, 1904 (taxonomy source)
Murchisonelloidea T. L. Casey, 1904 (basis of record)
Muricidae Rafinesque, 1815 (basis of record)
Nacellidae Thiele, 1891 (basis of record)
Nassariidae Iredale, 1916 (1835) (status source)
Neomphaliones accepted as Vetigastropoda (additional source)
Neritidae Rafinesque, 1815 (basis of record)
Neritimorpha (basis of record)
Neritoidea Rafinesque, 1815 (basis of record)
Nudibranchia (basis of record)
Oxychilinae P. Hesse, 1927 (basis of record)
Oxynooidea Stoliczka, 1868 (1847) (basis of record)
Parmacelloidea P. Fischer, 1856 (1855) (basis of record)
Phasianellidae Swainson, 1840 (basis of record)
Pisaniidae J. E. Gray, 1857 (basis of record)
Planaxidae J. E. Gray, 1850 (basis of record)
Planorbidae Rafinesque, 1815 (basis of record)
Planorbinae Rafinesque, 1815 (basis of record)
Polyceroidea Alder & Hancock, 1845 (basis of record)
Punctoidea E. S. Morse, 1864 (basis of record)
Pupilloidea W. Turton, 1831 (basis of record)
Pupilloidei (basis of record)
Pylopulmonata (basis of record)
Pyramidelloidea J. E. Gray, 1840 (basis of record)
Ringiculidae R. A. Philippi, 1853 (basis of record)
Ringiculimorpha (basis of record)