Euheterodonta

Euheterodonta is an subterclass of Mollusca in the class Bivalvia.

==Families== Subterclass Euheterodonta Superorder Anomalodesmata Dall, 1889 Superfamily Clavagelloidea d'Orbigny, 1844 Clavagellidae d'Orbigny, 1844 Penicillidae Gray, 1858 Superfamily Cuspidarioidea Dall, 1886 Cuspidariidae Dall, 1886 Halonymphidae Scarlato & Starobogatov, 1983 Protocuspidariidae Scarlato & Starobogatov, 1983 Spheniopsidae J. Gardner, 1928 Superfamily Myochamoidea Carpenter, 1861 Cleidothaeridae Hedley, 1918 (1870) Myochamidae Carpenter, 1861 Superfamily Pandoroidea Rafinesque, 1815 Lyonsiidae P. Fischer, 1887 Pandoridae Rafinesque, 1815 Superfamily Pholadomyoidea King, 1844 Parilimyidae Morton, 1981 Pholadomyidae King, 1844 Superfamily Poromyoidea Dall, 1886 Cetoconchidae Ridewood, 1903 Poromyidae Dall, 1886 Superfamily Thracioidea Stoliczka, 1870 (1839) Clistoconchidae Morton, 2012 Laternulidae Hedley, 1918 (1840) Periplomatidae Dall, 1895 Thraciidae Stoliczka, 1870 (1839) Superfamily Verticordioidea Stoliczka, 1870 Euciroidae Dall, 1895 Lyonsiellidae Dall, 1895 Verticordiidae Stoliczka, 1870 Superorder Imparidentia Bieler, P. M. Mikkelsen & Giribet, 2014 Order Adapedonta Cossmann & Peyrot, 1909 Superfamily Hiatelloidea J.E. Gray, 1824 Hiatellidae Gray, 1824 Superfamily Solenoidea Lamarck, 1809 Pharidae H. Adams & A. Adams, 1856 Solenidae Lamarck, 1809 Order Cardiida Ferussac, 1822 Superfamily Cardioidea Lamarck, 1809 Cardiidae Lamarck, 1809 Pterocardiidae Scarlato & Starobogatov, 1979 † Superfamily Tellinoidea Blainville, 1814 Order Hippuritida Newell, 1965 † Suborder Hippuritidina Newell, 1965 † Superfamily Caprinoidea d'Orbigny, 1847 † Antillocaprinidae Mac Gillavry, 1937 † Caprinidae d'Orbigny, 1847 † Caprinuloideidae Damestoy, 1971 † Ichthyosarcolitidae Douvillé, 1887 † Superfamily Radiolitoidea d'Orbigny, 1847 † Caprinulidae Yanin, 1990 † Caprotinidae Gray, 1848 † Diceratidae Dall, 1895 † Hippuritidae Gray, 1848 † Monopleuridae Munier-Chalmas, 1873 † Plagioptychidae Douvillé, 1888 † Polyconitidae Mac Gillavry, 1937 † Radiolitidae d'Orbigny, 1847 † Trechmannellidae Cox, 1934 † Suborder Requieniidina Skelton, 2013 † Superfamily Requienioidea Kutassy, 1934 † Epidiceratidae Rengarten, 1950 † Requieniidae Kutassy, 1934 † Incertae sedis Superfamily Chamoidea Lamarck, 1809 Chamidae Lamarck, 1809 Superfamily Cyamioidea Sars, 1878 Cyamiidae G.O. Sars, 1878 Galatheavalvidae Knudsen, 1970 Sportellidae Dall, 1899 Superfamily Gaimardioidea Hedley, 1916 Gaimardiidae Hedley, 1916 Superfamily Galeommatoidea J.E. Gray, 1840 Basterotiidae Cossmann, 1909 Galeommatidae Gray, 1840 Kelliidae Forbes & Hanley, 1848 Lasaeidae Gray, 1842 Montacutidae W. Clark, 1855 Superfamily Gastrochaenoidea Gray, 1840 Gastrochaenidae Gray, 1840 Superfamily Kalenteroidea Marwick, 1953 † Kalenteridae Marwick, 1953 † Superfamily Mactroidea Lamarck, 1809 Anatinellidae Deshayes, 1853 Cardiliidae P. Fischer, 1887 Mactridae Lamarck, 1809 Mesodesmatidae Gray, 1840 Superfamily Sphaerioidea Deshayes, 1855 (1820) Sphaeriidae Deshayes, 1855 (1820) Superfamily Ungulinoidea Gray, 1854 Ungulinidae Gray, 1854 Order Lucinida Gray, 1854 Superfamily Lucinoidea J. Fleming, 1828 Lucinidae J. Fleming, 1828 Superfamily Thyasiroidea Dall, 1900 (1895) Thyasiridae Dall, 1900 (1895) Order Megalodontida Starobogatov, 1992 † Superfamily Megalodontoidea Morris & Lycett, 1853 † Megalodontidae Morris & Lycett, 1853 † Pachyrismatidae Scarlato & Starobogatov, 1979 † Order Modiomorphida Newell, 1969 † Superfamily Modiomorphoidea S. A. Miller, 1877 † Modiomorphidae S. A. Miller, 1877 † Palaeopharidae Marwick, 1953 † Order Myida Stoliczka, 1870 Superfamily Dreissenoidea Gray, 1840 Dreissenidae Gray, 1840 Superfamily Myoidea Lamarck, 1809 Corbulidae Lamarck, 1818 Erodonidae Winckworth, 1932 Myidae Lamarck, 1809 Superfamily Pholadoidea Lamarck, 1809 Pholadidae Lamarck, 1809 Teredinidae Rafinesque, 1815 Xylophagidae Purchon, 1941 Order Venerida Gray, 1854 Superfamily Arcticoidea Newton, 1891 (1844) Arcticidae Newton, 1891 (1844) Trapezidae Lamy, 1920 (1895) Superfamily Cyrenoidea Gray, 1840 Cyrenidae Gray, 1840 Cyrenoididae H. Adams & A. Adams, 1857 (1853) Glauconomidae Gray, 1853 Superfamily Glossoidea J.E. Gray, 1847 (1840) Glossidae Gray, 1847 (1840) Lutetiidae Zhgenti, 1976 † Incertae sedis Kelliellidae Fischer, 1887 Vesicomyidae Dall & Simpson, 1901 Superfamily Veneroidea Rafinesque, 1815 Isocyprinidae R. N. Gardner, 2005 † Neoleptonidae Thiele, 1934 Veneridae Rafinesque, 1815