Heteroconchia is a

taxonomic Taxonomy is the practice and science of categorization or classification. A taxonomy (or taxonomical classification) is a scheme of classification, especially a hierarchical classification, in which things are organized into groups or types. ...

infraclass 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 buried in the sand of the seafloor or riverbeds. Clams have two ...

, marine

bivalve Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, bival ...

mollusc 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 ...

s, belonging to the subclass Autobranchia This infraclass includes the edible clams, the cockles and the

Venus clams 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 ex ...

Description

These bivalves are distinguished by having the two halves of the

shell Shell may refer to: Architecture and design * Shell (structure), a thin structure ** Concrete shell, a thin shell of concrete, usually with no interior columns or exterior buttresses ** Thin-shell structure Science Biology * Seashell, a hard o ...

equally sized (i.e, they are ''equivalved'') and having a few cardinal teeth separated from a number of long lateral teeth. Their shells lack a

nacre Nacre ( , ), also known as mother of pearl, is an organicinorganic composite material produced by some molluscs as an inner shell layer; it is also the material of which pearls are composed. It is strong, resilient, and iridescent. Nacre is f ...

ous layer, and the gills are

lamellibranch Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, bival ...

in form. Most species have a

siphon A siphon (from grc, σίφων, síphōn, "pipe, tube", also spelled nonetymologically syphon) is any of a wide variety of devices that involve the flow of liquids through tubes. In a narrower sense, the word refers particularly to a tube in a ...

Orders and families

The following tree is their info which has been updated with the latest information from the

World Register of Marine Species The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive list of names of marine organisms. Content The content of the registry is edited and maintained by scientific specialist ...

: Infraclass: Heteroconchia *Unclassified family: † Lipanellidae *Subterclass:

Archiheterodonta Carditida is an order of marine bivalve clams. Superfamilies and families According to the World Register of Marine Species: * Family: † Archaeocardiidae *Superfamily: Carditoidea ** Family: Carditidae ** Family: Condylocardiidae *Sup ...

**Order: † Actinodontida ***Superfamily: † Amnigenioidea ****Family: † Amnigeniidae ****Family: † Montanariidae ****Family: † Zadimerodiidae *** Superfamily: † Anodontopsoidea **** Family: † Actinodontidae **** Family: † Anodontopsidae **** Family: † Baidiostracidae **** Family: † Cycloconchidae **** Family: † Intihuarellidae **** Family: † Redoniidae *** Superfamily: † Nyassoidea **** Family: † Nyassidae *** Superfamily: † Oriocrassatelloidea **** Family: † Crassatellopsidae **** Family: † Oriocrassatellidae *** Superfamily: † Palaeomuteloidea **** Family: † Palaeomutelidae **Order: Carditida ***Unclassified family: † Archaeocardiidae ***Unclassified family: † Eodonidae ***Superfamily: Carditoidea **** Family: † Cardiniidae ****Family:

Carditidae Carditidae is a family of marine bivalve clams of the order Carditida, which was long included in the Venerida. They are the type taxon of the superfamily Carditoidea. Carditidae is a neglected and poorly classified family. It has six sub ...

****Family: Condylocardiidae ***Superfamily: Crassatelloidea ****Family: † Aenigmoconchidae ****Family: Astartidae ****Family: Crassatellidae ****Family: † Myophoricardiidae *Subterclass:

Euheterodonta Euheterodonta is an subterclass of Mollusca in the class Bivalvia. Families Infraclass Euheterodonta *Superorder Anomalodesmata Dall, 1889 **Superfamily Clavagelloidea d'Orbigny, 1844 *** Clavagellidae d'Orbigny, 1844 *** Penicillidae Gray, 185 ...

**Unassigned Euheterodonta ***Superfamily: † Babinkoidea ***Superfamily: † Orthonotoidea **Superorder:

Anomalodesmata Anomalodesmata is an superorder of saltwater clams, marine bivalve molluscs. This grouping was formerly recognised as a taxonomic subclass. It is called a superorder in the current World Register of Marine Species, despite having no orders, to ...

***Superfamily: Clavagelloidea ****Family:

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'' ** ...

****Family:

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 ...

***Superfamily:

Cuspidarioidea Anomalodesmata is an superorder of saltwater clams, marine bivalve molluscs. This grouping was formerly recognised as a taxonomic subclass. It is called a superorder in the current World Register of Marine Species, despite having no orders, t ...

****Family: Cuspidariidae ****Family:

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

****Family: Protocuspidariidae ****Family: Spheniopsidae ***Superfamily: Myochamoidea ****Family:

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 ...

****Family:

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 ...

***Superfamily: Pandoroidea ****Family:

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 ...

****Family:

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 ...

***Superfamily: Pholadomyoidea ****Family: † Arenigomyidae ****Family: † Margaritariidae ****Family:

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? ...

****Family:

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 ...

****Family: † Ucumariidae ***Superfamily:

Poromyoidea Poromyoidea is a superfamily of molluscs Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are reco ...

****Family:

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 ...

****Family:

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 ...

***Superfamily: Thracioidea ****Family: † Burmesiidae ****Family:

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 ...

****Family: Laternulidae ****Family: Periplomatidae ****Family: Thraciidae ***Superfamily: Verticordioidea ****Family: Euciroidae ****Family:

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 ...

****Family:

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 ...

** Superorder: Imparidentia *** Unassigned Imparidentia **** Unassigned Family: † Palaeocarditidae ****Superfamily: Cyamioidea *****Family: Cyamiidae *****Family:

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 ...

*****Family: Sportellidae ****Superfamily: Gaimardioidea *****Family: Gaimardiidae ****Superfamily: † Grammysioidea *****Family: † Grammysiidae *****Family: † Sanguinolitidae ****Superfamily: † Kalenteroidea *****Family: † Kalenteridae *** 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 ...

**** Superfamily: † Edmondioidea *****Family: † Edmondiidae *****Family: † Pachydomidae ****Superfamily: Hiatelloidea *****Family:

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. ...

****Superfamily: Solenoidea *****Family:

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 ...

*****Family:

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 Cult ...

***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 ...

****Superfamily: Cardioidea *****Family:

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 ...

*****Family: † Pterocardiidae ****Superfamily: Tellinoidea *****Family:

Donacidae The Donacidae, the "bean clams" or "wedge shells", are a family of bivalve molluscs of the superfamily Tellinoidea. The family is related to the ''Tellina''. The Donacidae are prolific filter feeders and are an important part of coastal food ...

*****Family: † Icanotiidae *****Family:

Psammobiidae The Psammobiidae, or sunset clams, are a family of medium-sized saltwater clams, marine bivalve molluscs of the order Cardiida. These genera are accepted by the database World Register of Marine Species: *'' Asaphis'' Modeer, 1793 *''Gari'' Sc ...

*****Family: † Quenstedtiidae *****Family:

Semelidae The Semelidae are a family of saltwater clams, marine bivalve molluscs in the order Cardiida. Description Members of this family have rounded or oval, elongated shells, much flattened. The two valves are connected by an internal ligament in c ...

*****Family:

Solecurtidae The Solecurtidae are a family of saltwater clams, marine bivalve molluscs in the order Cardiida. Genera Genera in the family Solenidae include: * '' Azorinus'' Récluz, 1869 * '' Clunaculum'' Dall, 1899 * ''Solecurtus'' Blainville, 1824 * ''Tage ...

*****Family: † Sowerbyidae *****Family: † Tancrediidae *****Family:

Tellinidae The Tellinidae are a family of marine bivalve molluscs of the order Cardiida. Commonly known as tellins or tellens, they live fairly deep in soft sediments in shallow seas and respire using long siphons that reach up to the surface of the sedime ...

*****Family: † Unicardiopsidae ***Order:

Galeommatida Galeommatida is an order of bivalves belonging to the class Bivalvia. Families: * Basterotiidae * Galeommatidae Galeommatidae is a family of small and very small saltwater clams, marine bivalve molluscs in the order Galeommatida. Genera ...

****Superfamily: Galeommatoidea *****Family: Basterotiidae *****Family:

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 ...

*****Family: Lasaeidae ***Order: Gastrochaenida ****Superfamily: Gastrochaenoidea *****Family:

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 ...

***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 ...

(rudists) ****Suborder: † Hippuritidina *****Superfamily: † Caprinoidea ******Family: † Antillocaprinidae ******Family: †

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 ...

******Family: † Caprinuloideidae ******Family: † Ichthyosarcolitidae *****Superfamily: † Radiolitoidea ******Family: † Caprinulidae ******Family: † Caprotinidae ******Family: †

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 ...

******Family: †

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 ...

******Family: † Monopleuridae ******Family: † Plagioptychidae ******Family: † Polyconitidae ******Family: †

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 ...

******Family: † Trechmannellidae ****Suborder: † Requieniidina *****Superfamily: † Requienioidea ******Family: † Epidiceratidae ******Family: †

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 ...

***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 ...

****Superfamily:

Lucinoidea Lucinidae, common name hatchet shells, is a family (biology), family of saltwater clams, marine (ocean), marine bivalve molluscs. These bivalves are remarkable for their endosymbiosis with sulphide-oxidizing bacteria. Characteristics The member ...

*****Family:

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 ...

*****Family: † Mactromyidae *****Family: † Paracyclidae ****Superfamily:

Thyasiroidea 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, ...

*****Family:

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 ...

***Order: † Megalodontida ****Superfamily: † Mecynodontoidea *****Family: † Beichuaniidae *****Family: † Congeriomorphidae *****Family: † Mecynodontidae *****Family: † Plethocardiidae *****Family: † Prosocoelidae ****Superfamily: †

Megalodontoidea Megalodontoidea is a superfamily of fossil bivalves in the order Megalodontida. The following families are included in Megalodontoidea: *† Ceratomyopsidae *†Dicerocardiidae Dicerocardiidae is an extinct family of fossil saltwater clams, ...

*****Family: † Ceratomyopsidae *****Family: †

Dicerocardiidae Dicerocardiidae is an extinct family of fossil saltwater clams, Marine (ocean), marine heterodont bivalve molluscs, in the order Megalodontida. Genera Genera within the family Dicerocardiidae: * †''Cornucardia'' Koken 1913 * †''Dicerocardium ...

*****Family: † Megalodontidae *****Family: † Pachyrismatidae *****Family: † Wallowaconchidae ***Order: † Modiomorphida ****Superfamily: † Modiomorphoidea *****Family: † Cypricardiniidae *****Family: † Hippopodiumidae *****Family: † Modiomorphidae *****Family: † Palaeopharidae *****Family: † Tusayanidae ***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 ...

****Superfamily:

Dreissenoidea Dreissenoidea is a superfamily of brackish water and freshwater false mussels, aquatic bivalve molluscs in the order Myida. Families Families within the superfamily Dreisseniodea include: *Dreissenidae The Dreissenidae are a family of smal ...

*****Family:

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 ...

****Superfamily: Myoidea *****Family:

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 ** '' ...

*****Family:

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 ...

*****Family: † Pleurodesmatidae *****Family: † Raetomyidae ****Superfamily: Pholadoidea *****Family:

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 ...

*****Family:

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 ...

(shipworms) *****Family:

Xylophagaidae Xylophagaidae is a family of deep-sea woodboring bivalve molluscs, similar to shipworms The shipworms are marine bivalve molluscs in the family Teredinidae: a group of saltwater clams with long, soft, naked bodies. They are notorious for bor ...

****Superfamily: † Pleuromyoidea *****Family: † Ceratomyidae *****Family: † Pleuromyidae *****Family: † Vacunellidae ***Order:

Sphaeriida Sphaeriida is an order of bivalves belonging to the class Bivalvia. Families: * Neomiodontidae * Sphaeriidae Sphaeriidae is a family of small to minute freshwater bivalve molluscs in the order Sphaeriida. In the US, they are commonly known ...

****Superfamily: Sphaerioidea *****Family: † Neomiodontidae *****Family:

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: ''Sphae ...

***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, t ...

****Superfamily: † Anthracosioidea *****Family: † Anthracosiidae *****Family: † Ferganoconchida *****Family: † Shaanxiconchidae ****Superfamily: Arcticoidea *****Family: Arcticidae *****Family: † Pollicidae *****Family: Trapezidae *****Family: † Veniellidae ****Superfamily:

Chamoidea 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 ...

*****Family:

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 ...

****Superfamily: Cyrenoidea *****Family: Cyrenidae *****Family: Cyrenoididae *****Family: Glauconomidae ****Superfamily: Glossoidea *****Family:

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 ...

*****Family: Kelliellidae *****Family: † Lutetiidae *****Family:

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 ...

****Superfamily: Hemidonacoidea *****Family: Hemidonacidae ****Superfamily: Mactroidea *****Family: Anatinellidae *****Family: Cardiliidae *****Family:

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- ...

*****Family:

Mesodesmatidae ''Mesodesmatidae'' is a family of saltwater clams, marine bivalve mollusks in the order Venerida.MolluscaBase eds. (2020). MolluscaBase. Mesodesmatidae Gray, 1840. Accessed through: World Register of Marine Species at: http://www.marinespecies.o ...

****Superfamily: † Palaeanodontoidea *****Family: † Palaeanodontidae ****Superfamily: † Prilukielloidea *****Family: † Prilukiellidae *****Family: † Senderzoniellidae ****Superfamily: Ungulinoidea *****Family: Ungulinidae ****Superfamily: Veneroidea *****Family: † Isocyprinidae *****Family: Neoleptonidae *****Family:

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 ...

Notes: * Family † Lyrodesmatidae was classified by Bieler, Carter & Coan (2010) as uncertain Heterodonta but has since been classified as

Palaeoheterodonta Palaeoheterodonta is a subclass of bivalve molluscs. It contains the extant orders Unionida (freshwater mussels) and Trigoniida. They are distinguished by having the two halves of the shell be of equal size and shape, but by having the hinge ...

. * Family † Redoniidae was classified by Bieler, Carter & Coan (2010) as uncertain Heterodonta but has since been classified more specifically as Anodontopsoidea. * Family † Lipanellidae was classified by Bieler, Carter & Coan (2010) as uncertain Heteroconchia (a proposed infraclass of the proposed bivalve subclass Autobranchia) but has since been classified as uncertain Heterodonta.

References

{{Taxonbar, from=Q20992204 Bivalve taxonomy Mollusc subclasses