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†Cycloconchidae †Hippuritoida †Lyrodesmatidae †Redoniidae Carditoida Anomalodesmata Myoida Lucinoida Veneroida

Heterodonta
Heterodonta
is a taxonomic subclass of saltwater clams, marine bivalve molluscs. This subclass includes the edible clams, the cockles and the Venus clams.[1]

Contents

1 Description 2 Orders 3 2010 Taxonomy

3.1 Infraclass: Archiheterodonta[4][5] 3.2 Order: Carditoida[6] 3.3 Infraclass: Euheterodonta[7] 3.4 Unassigned Euheterodonta[8] 3.5 Order: Anomalodesmata[9] 3.6 Order: Myoida[10] 3.7 Order: Lucinoida[11] 3.8 Order: Veneroida[12]

4 References

Description[edit] These bivalves are distinguished by having the two halves of the shell 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 nacreous layer, and the gills are lamellibranch in form. Most species have a siphon.[2] Orders[edit] This subclass contains four extinct orders, five orders of living bivalves, and a group of as yet unassigned Euheterodonta:

Order †Cycloconchidae Order † Hippuritoida
Hippuritoida
(rudists) Order †Lyrodesmatidae Order †Redoniidae

2010 Taxonomy[edit] In 2010, a new proposed classification system for the Bivalvia
Bivalvia
was published in by Bieler, Carter & Coan, revising the classification of the Bivalvia, including the subclass Heterodonta.[3] Subclass: Heterodonta Infraclass: Archiheterodonta[4][5][edit] Order: Carditoida[6][edit]

Superfamily: Carditoidea

Family: Carditidae Family: Condylocardidae

Superfamily: Crassitelloidea

Family: Crassitellidae Family: Astartidae

Infraclass: Euheterodonta[7][edit] Unassigned Euheterodonta[8][edit]

Superfamily: Gastrochaenoidea

Family: Gastrochaenidae

Superfamily: Hiatelloidea

Family: Hiatellidae

Superfamily: Solenoidea

Family: Solenidae Family: Pharidae

Order: Anomalodesmata[9][edit]

Superfamily: Clavagelloidea

Family: Clavagellidae Family: Penicillidae

Superfamily: Cuspidarioidea

Family: Cuspidariidae

Superfamily: Myochamoidea

Family: Cleidothaeridae Family: Myochamidae

Superfamily: Pandoroidea

Family: Pandoridae Family: Lyonsiidae

Superfamily: Pholadomyoidea

Family: Parilimyidae Family: Pholadomyidae

Superfamily: Poromyoidea

Family: Poromyidae

Superfamily: Thracioidea

Family: Thraciidae Family: Laternulidae Family: Periplomatidae

Superfamily: Verticordioidea

Family: Lyonsiellidae Family: Verticordiidae Family: Euciroidae

Order: Myoida[10][edit]

Suborder: Myina

Superfamily: Myoidea

Family: Corbulidae Family: Myidae

Superfamily: Pholadoidea

Family: Pholadidae Family: Teredinidae

Order: Lucinoida[11][edit]

Superfamily: Lucinoidea

Family: Lucinidae

Superfamily: Thyasiroidea

Family: Thyasiridae

Order: Veneroida[12][edit]

Superfamily: Arcticoidea

Family: Arcticidae Family: Trapezidae

Superfamily: Corbiculoidea

Family: Corbiculidae

Superfamily: Cyamioidea

Family: Cyamiidae Family: Neoleptonidae Family: Sportellidae

Superfamily: Glossoidea

Family: Glossidae

Superfamily: Tridacnoidea

Family: Tridacnidae

Superfamily: Cardioidea

Family: Cardiidae

Superfamily: Chamoidea

Family: Chamidae

Superfamily: Galeommatoidea

Family: Galeommatidae Family: Kelliidae Family: Lasaeidae Family: Leptonidae Family: Montacutidae

Superfamily: Mactroidea

Family: Cardiliidae Family: Mactridae Family: Mesodesmatidae

Superfamily: Tellinoidea

Family: Donacidae Family: Pharidae Family: Psammobiidae Family: Semelidae Family: Tellinidae Family: Solecurtidae

Superfamily: Ungulinoidea

Family: Ungulinidae

Superfamily: Cyrenoididae

Family: Cyrenoididae

Superfamily: Veneroidea

Family: Petricolidae Family: Turtoniidae Family: Veneridae

References[edit]

^ Heterodonta
Heterodonta
Neumayr, 1884.  Retrieved through: World Register of Marine Species on 3 February 2009. ^ Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 340. ISBN 0-03-056747-5.  ^ Bieler, R., Carter, J.G. & Coan, E.V. (2010) Classification of Bivalve
Bivalve
families. Pp. 113-133, in: Bouchet, P. & Rocroi, J.P. (2010), Nomenclator of Bivalve
Bivalve
Families. Malacologia 52(2): 1-184 ^ Archiheterodonta Giribet in Taylor, Williams, Glover & Dyal, 2007.  Retrieved through: World Register of Marine Species on 3 February 2009. ^ Giribet G. 2008. Bivalvia. Pp. 105-141, in: Ponder W.F. & Lindberg D.L. (eds), Molluscan Phylogeny. Berkeley: University of California Press, xi+469 pp. ^ Carditoida
Carditoida
Dall, 1889.  Retrieved through: World Register of Marine Species on 3 August 2010. ^ Euheterodonta Giribet in Taylor, Williams, Glover & Dyal, 2007.  Retrieved through: World Register of Marine Species on 3 February 2009. ^ Unassigned Euheterodonta.  Retrieved through: World Register of Marine Species on 12 July 2009. ^ Anomalodesmata Dall, 1889.  Retrieved through: World Register of Marine Species on 9 July 2010. ^ Myoida
Myoida
Stoliczka, 1870.  Retrieved through: World Register of Marine Species on 9 July 2010. ^ Lucinoida Gray, 1854.  Retrieved through: World Register of Marine Species on 10 July 2010. ^ Veneroida
Veneroida
Gray, 1854.  Retrieved through: World Register of Marine Species on 9 July 2010.

Taxon identifiers

Wd: Q131873 EoL: 2576871 Fauna Europaea: 11487 ITIS: 80383 NCBI: 6599 WoRMS: 216

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