Euheterodonta is an subterclass of

Mollusca Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is esti ...

in the class

Bivalvia Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of w ...

Families

Infraclass Euheterodonta *Superorder Anomalodesmata Dall, 1889 **Superfamily Clavagelloidea d'Orbigny, 1844 ***

Clavagellidae Clavagellidae is a family of very unusual marine bivalves of the order Anomalodesmata. Genera and species * †'' Ascaulocardium'' Pojeta and N. F 1987 * '' Brechites'' Guettard 1770 ** '' Brechites attrahens'' ** '' Brechites brechites'' ** ...

d'Orbigny, 1844 ***

Penicillidae Penicillidae is a family of bivalves belonging to the order Anomalodesmata. Genera: * '' Brechites'' Guettard, 1770 * '' Foegia'' Gray, 1842 * '' Humphreyia'' Gray, 1858 * '' Kendrickian'' B.Morton, 2004 * '' Nipponoclava'' B.J.Smith, 1976 * ''V ...

Gray, 1858 **Superfamily Cuspidarioidea Dall, 1886 *** Cuspidariidae Dall, 1886 ***

Halonymphidae Halonymphidae is a family of bivalves belonging to the order Anomalodesmata. Genera: * '' Halonympha'' Dall & Smith, 1886 References Anomalodesmata Bivalve families {{bivalve-stub ...

Scarlato & Starobogatov, 1983 ***

Protocuspidariidae Protocuspidariidae is a family of bivalves belonging to the superfamily Cuspidarioidea in the superorder Anomalodesmata Anomalodesmata is an superorder of saltwater clams, marine bivalve molluscs. This grouping was formerly recognised as a taxo ...

Scarlato & Starobogatov, 1983 *** Spheniopsidae J. Gardner, 1928 **Superfamily Myochamoidea Carpenter, 1861 ***

Cleidothaeridae ''Cleidothaerus albidus'' is a bivalve mollusc of the family Cleidothaeridae, the only member of its genus and family. It is endemic to southeast Australia and the North Island of New Zealand, including the Chatham Islands The Chatham ...

Hedley, 1918 (1870) ***

Myochamidae Myochamidae is a family (biology), family of saltwater clams, marine (ocean), marine bivalves in the order Anomalodesmata. Genera Genera within the family Myochamidae:Gofas, S. (2015). Myochamidae Carpenter, 1861. Accessed through: World Registe ...

Carpenter, 1861 **Superfamily Pandoroidea Rafinesque, 1815 ***

Lyonsiidae Lyonsiidae is a family of small saltwater clams, marine bivalve molluscs in the order Anomalodesmata. Description Members of this family have inequivalve, oblong valves that are nearly equilateral. The right valve is more convex than the left ...

P. Fischer, 1887 ***

Pandoridae Pandoridae is a taxonomic family of small saltwater clams, marine bivalves in the order Anomalodesmata Anomalodesmata is an superorder of saltwater clams, marine bivalve molluscs. This grouping was formerly recognised as a taxonomic subcl ...

Rafinesque, 1815 **Superfamily Pholadomyoidea King, 1844 ***

Parilimyidae Parilimyidae is a family of bivalves belonging to the superorder Anomalodesmata. MolluscaBase eds. (2022). MolluscaBase. Parilimyidae B. Morton, 1981. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php? ...

Morton, 1981 ***

Pholadomyidae Pholadomyidae is a taxonomic family of saltwater clams, marine bivalve molluscs in the order Anomalodesmata Anomalodesmata is an superorder of saltwater clams, marine bivalve molluscs. This grouping was formerly recognised as a taxonomic ...

King, 1844 **Superfamily Poromyoidea Dall, 1886 ***

Cetoconchidae ''Cetoconcha'' is the only extant genus of saltwater clams Clam is a common name for several kinds of bivalve molluscs. The word is often applied only to those that are edible and live as infauna, spending most of their lives halfway burie ...

Ridewood, 1903 ***

Poromyidae Poromyidae is a family of saltwater clams, marine bivalve molluscs in the order Anomalodesmata. The genus ''Dilemma'', described in 2008, is remarkable for being a predator of copepods, which is very unusual for a sessile mollusc. Genera and sp ...

Dall, 1886 **Superfamily Thracioidea Stoliczka, 1870 (1839) ***

Clistoconchidae Clistoconchidae is a family of bivalves belonging to the order Anomalodesmata Anomalodesmata is an superorder of saltwater clams, marine bivalve molluscs. This grouping was formerly recognised as a taxonomic subclass. It is called a superorde ...

Morton, 2012 *** Laternulidae Hedley, 1918 (1840) *** Periplomatidae Dall, 1895 *** Thraciidae Stoliczka, 1870 (1839) **Superfamily Verticordioidea Stoliczka, 1870 *** Euciroidae Dall, 1895 ***

Lyonsiellidae Lyonsiellidae is a taxonomic family of marine bivalve molluscs in the superfamily SUPERFAMILY is a database and search platform of structural and functional annotation for all proteins and genomes. It classifies amino acid sequences into know ...

Dall, 1895 ***

Verticordiidae Verticordiidae is a family of benthic marine bivalves in the superorder Anomalodesmata. These clams range from 2 - 200 millimeters in length and are mainly found in coastal waters surrounding Australia and the Americas, though a few species withi ...

Stoliczka, 1870 *Superorder Imparidentia Bieler, P. M. Mikkelsen & Giribet, 2014 **Order

Adapedonta Adapedonta is an order of bivalves belonging to the class Bivalvia. Families: * Edmondiidae * Hiatellidae * † Pachydomidae * Pharidae * Solenidae Solenidae, commonly called "razor shells", is a family of marine bivalve molluscs in the un ...

Cossmann & Peyrot, 1909 ***Superfamily Hiatelloidea J.E. Gray, 1824 ****

Hiatellidae Hiatellidae is a taxonomic family of saltwater clams, marine bivalve molluscs. This family is placed in the order Adapedonta.Bieler R., Carter J.G. & Coan E.V. (2010). Classification of Bivalve families. Pp. 113-133, in: Bouchet P. & Rocroi J. ...

Gray, 1824 ***Superfamily Solenoidea Lamarck, 1809 ****

Pharidae Pharidae is a taxonomic family of saltwater clams, marine bivalve molluscs in the order Adapedonta. This family of clams is related to the razor shells, a family which is considered to include Pharidae by some authorities. Genera Genera within ...

H. Adams & A. Adams, 1856 ****

Solenidae Solenidae, commonly called "razor shells", is a family of marine bivalve molluscs in the unassigned Euheterodonta. Taxonomy Originally, razor shells were all classified as Solenidae. Then, the genera were grouped into two sub-families, the Cul ...

Lamarck, 1809 **Order

Cardiida Cardiida is an order of bivalves belonging to the class Bivalvia. Families: * Cardiidae * Donacidae * Ephippiodontidae * Ferganoconchidae * Glaucomyidae * Goniocardiidae * Icanotiidae * Lahillidae * Limnocyrenidae * Lutetidae * Psammob ...

Ferussac, 1822 ***Superfamily Cardioidea Lamarck, 1809 ****

Cardiidae A cockle is an edible marine bivalve mollusc. Although many small edible bivalves are loosely called cockles, true cockles are species in the family Cardiidae. MolluscaBase eds. (2022). MolluscaBase. Cardiidae Lamarck, 1809. Accessed through: W ...

Lamarck, 1809 **** Pterocardiidae Scarlato & Starobogatov, 1979 † ***Superfamily Tellinoidea Blainville, 1814 **Order

Hippuritida Rudists are a group of extinct box-, tube- or ring-shaped marine heterodont bivalves belonging to the order Hippuritida that arose during the Late Jurassic and became so diverse during the Cretaceous that they were major reef-building organis ...

Newell, 1965 † ***Suborder Hippuritidina Newell, 1965 † ****Superfamily Caprinoidea d'Orbigny, 1847 † ***** Antillocaprinidae Mac Gillavry, 1937 † *****

Caprinidae Caprinidae is a family of rudists, a group of unusual extinct saltwater clams, marine heterodont bivalves in the order Hippuritida. These stationary intermediate-level epifaunal suspension feeders lived in the Cretaceous period, from 140.2 to ...

d'Orbigny, 1847 † ***** Caprinuloideidae Damestoy, 1971 † ***** Ichthyosarcolitidae Douvillé, 1887 † ****Superfamily Radiolitoidea d'Orbigny, 1847 † ***** Caprinulidae Yanin, 1990 † ***** Caprotinidae Gray, 1848 † *****

Diceratidae Diceratidae is a family of rudists Rudists are a group of extinct box-, tube- or ring-shaped marine heterodont bivalves belonging to the order Hippuritida that arose during the Late Jurassic and became so diverse during the Cretaceous that ...

Dall, 1895 † *****

Hippuritidae Rudists are a group of extinct box-, tube- or ring-shaped marine heterodont bivalves belonging to the order Hippuritida that arose during the Late Jurassic and became so diverse during the Cretaceous that they were major reef-building organis ...

Gray, 1848 † ***** Monopleuridae Munier-Chalmas, 1873 † ***** Plagioptychidae Douvillé, 1888 † ***** Polyconitidae Mac Gillavry, 1937 † *****

Radiolitidae ''Radiolitidae'' is a family of rudists in the order Hippuritida. Fossil record These rudists lived between the Jurassic and the Cretaceous (age range: 130.0 to 66.043 million years ago). Genera Genera within this family include: * † '' Agri ...

d'Orbigny, 1847 † ***** Trechmannellidae Cox, 1934 † ***Suborder Requieniidina Skelton, 2013 † ****Superfamily Requienioidea Kutassy, 1934 † ***** Epidiceratidae Rengarten, 1950 † *****

Requieniidae Requieniidae is a family of rudists, in the order Hippuritida, which lived from 155.7 to 66.043 million years ago. Taxonomy Placed by the WoRMS and Fossilworks Fossilworks is a portal which provides query, download, and analysis tools to fac ...

Kutassy, 1934 † **''Incertae sedis'' ***Superfamily Chamoidea Lamarck, 1809 ****

Chamidae Chamidae, common name the jewel boxes or jewel box clams, is a taxonomic family of saltwater clams, a group of marine bivalve mollusks in the order Venerida.Abbott, R.T. & Morris, P.A. ''A Field Guide to Shells: Atlantic and Gulf Coasts and the ...

Lamarck, 1809 ***Superfamily Cyamioidea Sars, 1878 **** Cyamiidae G.O. Sars, 1878 ****

Galatheavalvidae Galatheavalvidae is a family of bivalves belonging to the order Venerida Venerida (formerly Veneroida) is an order of mostly saltwater but also some freshwater bivalve molluscs. This order includes many familiar groups such as many clams that ...

Knudsen, 1970 **** Sportellidae Dall, 1899 ***Superfamily Gaimardioidea Hedley, 1916 **** Gaimardiidae Hedley, 1916 ***Superfamily Galeommatoidea J.E. Gray, 1840 **** Basterotiidae Cossmann, 1909 ****

Galeommatidae Galeommatidae is a family of small and very small saltwater clams, marine bivalve molluscs in the order Galeommatida. Genera and species Genera and species within the family Galeommatidae include: * '' Achasmea'' Dall, Bartsch & Rehder, 1938 ...

Gray, 1840 **** Kelliidae Forbes & Hanley, 1848 **** Lasaeidae Gray, 1842 **** Montacutidae W. Clark, 1855 ***Superfamily Gastrochaenoidea Gray, 1840 ****

Gastrochaenidae Gastrochaenidae is a taxonomic family of saltwater clams, marine bivalve molluscs Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,0 ...

Gray, 1840 ***Superfamily Kalenteroidea Marwick, 1953 † **** Kalenteridae Marwick, 1953 † ***Superfamily Mactroidea Lamarck, 1809 **** Anatinellidae Deshayes, 1853 **** Cardiliidae P. Fischer, 1887 ****

Mactridae Mactridae, common name the trough shells or duck clams, is a family of saltwater clams, marine bivalve mollusks in the order Venerida. Description These clams have two short siphons, each with a horny sheath. The shell is shaped like a rounded- ...

Lamarck, 1809 ****

Mesodesmatidae ''Mesodesmatidae'' is a family (biology), family of saltwater clams, marine (ocean), marine bivalve mollusks in the order (biology), order Venerida.MolluscaBase eds. (2020). MolluscaBase. Mesodesmatidae Gray, 1840. Accessed through: World Registe ...

Gray, 1840 ***Superfamily Sphaerioidea Deshayes, 1855 (1820) ****

Sphaeriidae Sphaeriidae is a family of small to minute freshwater bivalve molluscs in the order Sphaeriida. In the US, they are commonly known as pea clams or fingernail clams. Heard, William H. 1977. Reproduction of fingernail clams (Sphaeriidae: ''Sphaeri ...

Deshayes, 1855 (1820) ***Superfamily Ungulinoidea Gray, 1854 **** Ungulinidae Gray, 1854 **Order

Lucinida Lucinida (formerly Lucinoida) is a taxonomic order of saltwater clams, marine bivalve molluscs. Families In 2010, a new proposed classification system for the Bivalvia was published in by Bieler, Carter & Coan, revising the classification o ...

Gray, 1854 ***Superfamily Lucinoidea J. Fleming, 1828 ****

Lucinidae Lucinidae, common name hatchet shells, is a family of saltwater clams, marine bivalve molluscs. These bivalves are remarkable for their endosymbiosis with sulphide-oxidizing bacteria. Characteristics The members of this family have a worldwi ...

J. Fleming, 1828 ***Superfamily Thyasiroidea Dall, 1900 (1895) ****

Thyasiridae Thyasiridae is a family of bivalve molluscs, including the cleft clams, in the order Lucinida. Genera and species * '' Adontorhina'' S. S. Berry, 1947 ** '' Adontorhina cyclia'' S. S. Berry, 1947 ** '' Adontorhina keegani'' Barry & McCormack ...

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 Myida (formerly Myoida) is an order of saltwater and freshwater clams, marine and freshwater bivalve molluscs in the subclass Heterodonta. The order includes such bivalves as soft-shell clams, geoducks and shipworms. Description They are burrowi ...

Stoliczka, 1870 ***Superfamily Dreissenoidea Gray, 1840 ****

Dreissenidae The Dreissenidae are a family of small freshwater mussels, aquatic bivalve molluscs. They attach themselves to stones or to any other hard surface using a byssus. The shells of these bivalves are shaped somewhat like those of true mussels, and t ...

Gray, 1840 ***Superfamily Myoidea Lamarck, 1809 ****

Corbulidae Corbulidae is a family of very small saltwater clams, marine bivalve molluscs in the order Myida. Genera and species Genera and species in the family Corbulidae include: * '' Anisocorbula'' Iredale, 1930 * '' Apachecorbula'' Olivera, 2014 ** '' ...

Lamarck, 1818 **** Erodonidae Winckworth, 1932 ****

Myidae Myidae, common name the softshell clams, is a taxonomic family of marine bivalve molluscs in the order Myida. Genera Genera within the family Myidae include: * '' Cryptomya'' ( Conrad, 1848) **'' Cryptomya californica'' ( Conrad, 1837) – Cali ...

Lamarck, 1809 ***Superfamily Pholadoidea Lamarck, 1809 ****

Pholadidae Pholadidae, known as piddocks or angelwings, are a family of bivalve molluscs similar to a clam. Background Piddocks are unique in that each side of their shells is divided into 2 or 3 separate sections. Furthermore, one of the piddock's shells ...

Lamarck, 1809 ****

Teredinidae The shipworms are marine bivalve molluscs in the family Teredinidae: a group of saltwater clams with long, soft, naked bodies. They are notorious for boring into (and commonly eventually destroying) wood that is immersed in sea water, including ...

Rafinesque, 1815 ****

Xylophagidae The Brachyceran infraorder Xylophagomorpha is a small group that consists solely of the family Xylophagidae, which presently contains subfamilies that were sometimes considered to be two small related families (Coenomyiidae and Rachiceridae). ...

Purchon, 1941 **Order

Venerida Venerida (formerly Veneroida) is an order of mostly saltwater but also some freshwater bivalve molluscs. This order includes many familiar groups such as many clams that are valued for food and a number of freshwater bivalves. Since the 2000s, ...

Gray, 1854 ***Superfamily Arcticoidea Newton, 1891 (1844) ****

Arcticidae The Arcticidae are a family of marine clams in the order Venerida. The only living species in the family is ''Arctica islandica''. There are also many fossil species classified in a number of genera Genus ( plural genera ) is a taxonomic rank ...

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 Glossidae is a family (biology), family of marine (ocean), saltwater bivalve, clams in the superfamily Glossoidea. Genera and species Genera and species within the family Glossidae include: *''Glossocardia (bivalve), Glossocardia'' Stoliczka, 18 ...

Gray, 1847 (1840) **** Lutetiidae Zhgenti, 1976 † ***''Incertae sedis'' **** Kelliellidae Fischer, 1887 ****

Vesicomyidae Vesicomyidae is a family of saltwater clams, marine bivalve molluscs in the superfamily Glossoidea. MolluscaBase eds. (2022). MolluscaBase. Vesicomyidae Dall & Simpson, 1901. Accessed through: World Register of Marine Species at: https://www.ma ...

Dall & Simpson, 1901 ***Superfamily Veneroidea Rafinesque, 1815 **** Isocyprinidae R. N. Gardner, 2005 † **** Neoleptonidae Thiele, 1934 ****

Veneridae The Veneridae or venerids, common name: Venus clams, are a very large family of minute to large, saltwater clams, marine bivalve molluscs. Over 500 living species of venerid bivalves are known, most of which are edible, and many of which are e ...

Rafinesque, 1815 {{Taxonbar, from=Q16635178 Bivalve taxonomy