"Lower Heterobranchia" (basis of record)
Acochlidiimorpha (basis of record)
Acochlidioidea Küthe, 1935 (basis of record)
Acteocinidae Dall, 1913 accepted as Tornatinidae P. Fischer, 1883 (source of synonymy)
Acteonidae A. d'Orbigny, 1842 (basis of record)
Acteonimorpha (basis of record)
Aeolidioidea Gray, 1827 (basis of record)
Amathinidae Ponder, 1987 (basis of record)
Amoriinae J. E. Gray, 1857 (basis of record)
Angariidae J. E. Gray, 1857 (basis of record)
Aplysiida (basis of record)
Aplysioidea Lamarck, 1809 (basis of record)
Architectonicidae J. E. Gray, 1850 (basis of record)
Architectonicoidea J. E. Gray, 1850 (basis of record)
Arminoidea Iredale & O'Donoghue, 1923 (1841) (basis of record)
Babyloniidae Kuroda, Habe & Oyama, 1971 (basis of record)
Buccinoidea Rafinesque, 1815 (additional source)
Bullinidae Gray, 1850 accepted as Aplustridae Gray, 1847 (source of synonymy)
Bulloidea Gray, 1827 (basis of record)
Bursidae Thiele, 1925 (basis of record)
Caecidae J. E. Gray, 1850 (basis of record)
Calliostomatidae Thiele, 1924 (1847) (basis of record)
Cancellariidae Forbes & Hanley, 1851 (status source)
Cavoliniidae J. E. Gray, 1850 (1815) (basis of record)
Cerithiopsidae H. Adams & A. Adams, 1853 (basis of record)
Chilodontaidae Wenz, 1938 (basis of record)
Chromodorididae Bergh, 1891 (basis of record)
Chromodoridinae Bergh, 1891 (basis of record)
Chromodoridoidea Bergh, 1891 (basis of record)
Cladobranchia (status source)
Colloniidae Cossmann, 1917 (additional source)
Columbellidae Swainson, 1840 (status source)
Creseidae Rampal, 1973 (basis of record)
Cycloneritida (basis of record)
Cymatiidae Iredale, 1913 (taxonomy source)
Cypraeoidea Rafinesque, 1815 (additional source)
Dendronotoidea Allman, 1845 (basis of record)
Diodorinae Odhner, 1932 (basis of record)
Doridina (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)
Ergalataxinae Kuroda, T. Habe & Oyama, 1971 (basis of record)
Erosariinae Schilder, 1924 (basis of record)
Erroneinae Schilder, 1927 (status source)
Euthecosomata (basis of record)
Euthyneura (basis of record)
Fasciolariidae Gray, 1853 (additional source)
Fissurellidae J. Fleming, 1822 (basis of record)
Fissurelloidea J. Fleming, 1822 (basis of record)
Fossarinae A. Adams, 1860 (basis of record)
Gymnodorididae Odhner, 1941 accepted as Polycerinae Alder & Hancock, 1845 (source of synonymy)
Gymnosomata (basis of record)
Harpidae Bronn, 1849 (basis of record)
Harpinae Bronn, 1849 (basis of record)
Heterobranchia (basis of record)
Heterobranchia (additional source)
Hipponicidae Troschel, 1861 (basis of record)
Hipponicoidea Troschel, 1861 (basis of record)
Limacinidae Gray, 1840 (basis of record)
Limacinoidea Gray, 1840 (basis of record)
Luriinae Schilder, 1932 (basis of record)
Lymnaeoidea Rafinesque, 1815 (basis of record)
Mangeliidae P. Fischer, 1883 (status source)
Melongenidae Gill, 1871 (1854) (status source)
Melonini Pilsbry & Olsson, 1954 (basis of record)
Miamirinae Bergh, 1891 (basis of record)
Mitroidea Swainson, 1831 (basis of record)
Muricidae Rafinesque, 1815 (basis of record)
Nacellidae Thiele, 1891 (basis of record)
Nassariidae Iredale, 1916 (1835) (status source)
Neritidae Rafinesque, 1815 (basis of record)
Neritimorpha (basis of record)
Neritoidea Rafinesque, 1815 (basis of record)
Nudibranchia (basis of record)
Onchidioidea Rafinesque, 1815 (basis of record)
Ovulidae J. Fleming, 1822 (basis of record)
Oxynooidea Stoliczka, 1868 (1847) (basis of record)
Phenacolepadidae Pilsbry, 1895 (basis of record)
Phenacolepadinae Pilsbry, 1895 (status source)
Pisaniidae Gray, 1857 (basis of record)
Planaxidae J. E. Gray, 1850 (basis of record)
Planorbidae Rafinesque, 1815 (basis of record)
Platyhedyloidea Salvini-Plawen, 1973 (basis of record)
Polyceroidea Alder & Hancock, 1845 (basis of record)
Prionovolvinae Fehse, 2007 (source of synonymy)
Pseudothecosomata (basis of record)
Pteropoda (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)
Ringiculoidea R. A. Philippi, 1853 (basis of record)
Ringipleura (basis of record)
Sacoglossa (basis of record)
Scaliolidae Jousseaume, 1912 (basis of record)
Seguenzioidea A. E. Verrill, 1884 (basis of record)
Siphonariida (basis of record)
Siphonarimorpha (basis of record)