Abra Lamarck, 1818 (basis of record)
Acochlidium Strubell, 1892 (basis of record)
Acochlidium Strubell, 1892 (extant flag source)
Acteocina Gray, 1847 (basis of record)
Acteon Montfort, 1810 (basis of record)
Admete Krøyer, 1842 (basis of record)
Aequipecten P. Fischer, 1886 (basis of record)
Akera O. F. Müller, 1776 (basis of record)
Amphibola Schumacher, 1817 (basis of record)
Amphibola Schumacher, 1817 (extant flag source)
Anachis H. Adams & A. Adams, 1853 (basis of record)
Ancyloceras d'Orbigny, 1842 † (basis of record)
Anomia Linnaeus, 1758 (basis of record)
Anulidentalium Chistikov, 1975 (extant flag source)
Anulidentalium Chistikov, 1975 (basis of record)
Aplysia Linnaeus, 1767 (basis of record)
Aplysia Linnaeus, 1767 (extant flag source)
Aporrhais Da Costa, 1778 (basis of record)
Argopecten Monterosato, 1889 (basis of record)
Armiger Hartmann, 1843 accepted as Gyraulus Charpentier, 1837 (basis of record)
Armiger Hartmann, 1843 accepted as Gyraulus Charpentier, 1837 (extant flag source)
Atlanta Lesueur, 1817 (basis of record)
Atrina Gray, 1842 (basis of record)
Atys Montfort, 1810 (basis of record)
Batillaria Benson, 1842 (basis of record)
Berthellina Gardiner, 1936 (extant flag source)
Berthellina Gardiner, 1936 (basis of record)
Bittium Gray, 1847 (basis of record)
Bofonaria accepted as Bufonaria Schumacher, 1817 (basis of record)
Bofonaria accepted as Bufonaria Schumacher, 1817 (extant flag source)
Bulla Linnaeus, 1758 (basis of record)
Bursatella Blainville, 1817 (extant flag source)
Bursatella Blainville, 1817 (basis of record)
Busycon Röding, 1798 (basis of record)
Caecum Fleming, 1813 (basis of record)
Callista Poli, 1791 (basis of record)
Calyptraea Lamarck, 1799 (basis of record)
Capulus Montfort, 1810 (basis of record)
Carinaria Lamarck, 1801 (basis of record)
Cassidarius (basis of record)
Cassidarius (extant flag source)
Cassis Scopoli, 1771 (basis of record)
Cellana H. Adams, 1869 (basis of record)
Cerithium Bruguière, 1789 (basis of record)
Chama Linnaeus, 1758 (basis of record)
Cochliolepis Stimpson, 1858 (basis of record)
Cominella Gray, 1850 (basis of record)
Conus Linnaeus, 1758 (basis of record)
Coralliophila H. Adams & A. Adams, 1853 (basis of record)
Crepidula Lamarck, 1799 (basis of record)
Cryptomya Conrad, 1849 (basis of record)
Cuspidaria Nardo, 1840 (basis of record)
Cyclostremiscus Pilsbry & Olsson, 1945 (basis of record)
Cylichna Lovén, 1846 (basis of record)
Cylichnina Monterosato, 1884 accepted as Retusa T. Brown, 1827 (basis of record)
Cymatium Röding, 1798 (basis of record)
Cyphoma Röding, 1798 (basis of record)
Cypraea Linnaeus, 1758 (basis of record)
Dendropoma Mörch, 1861 (basis of record)
Detracia Gray in Turton, 1840 (extant flag source)
Detracia Gray in Turton, 1840 (basis of record)
Dinocardium Dall, 1900 (basis of record)
Divarecella accepted as Divaricella Martens in Moebius, 1880 (basis of record)
Divarecella accepted as Divaricella Martens in Moebius, 1880 (extant flag source)
Donax Linnaeus, 1758 (basis of record)
Dreissena van Beneden, 1835 (basis of record)
Elimia Adams, 1854 (basis of record)
Elimia Adams, 1854 (extant flag source)
Ensis Schumacher, 1817 (basis of record)
Entemnotrochus P. Fischer, 1885 (basis of record)
Enteroxenos Bonnevie, 1902 (basis of record)
Enteroxenos Bonnevie, 1902 (extant flag source)
Entocolax Voigt, 1888 (basis of record)
Entocolax Voigt, 1888 (extant flag source)
Entoconcha J. Müller, 1852 (basis of record)
Entoconcha J. Müller, 1852 (extant flag source)
Entovalva Voeltzkow, 1890 (extant flag source)
Entovalva Voeltzkow, 1890 (basis of record)
Epitonium Röding, 1798 (basis of record)
Eulima Risso, 1826 (basis of record)
Eupleura H. Adams & A. Adams, 1853 (basis of record)
Ficus Röding, 1798 (basis of record)
Gastrochaena Spengler, 1783 (basis of record)
Geukensia van de Poel, 1959 (basis of record)
Haminoea Turton & Kingston [in Carrington], 1830 (basis of record)
Harpa Röding, 1798 (basis of record)
Helcion Montfort, 1810 (basis of record)
Helisoma Swainson, 1840 (basis of record)
Hippopus Lamarck, 1799 (basis of record)
Hyatella Férussac, 1821 accepted as Hiatella Bosc, 1801 (extant flag source)
Hyatella Férussac, 1821 accepted as Hiatella Bosc, 1801 (basis of record)
Hydatina Schumacher, 1817 (extant flag source)
Hydatina Schumacher, 1817 (basis of record)
Hydridella accepted as Hyridella Swainson, 1840 (extant flag source)
Hydridella accepted as Hyridella Swainson, 1840 (basis of record)
Hydrobia Hartmann, 1821 (basis of record)
Ilyanassa Stimpson, 1865 accepted as Tritia Risso, 1826 (basis of record)
Isognomon Lightfoot, 1786 (basis of record)
Janthina Röding, 1798 (basis of record)
Kellia Turton, 1822 (basis of record)