Hellenica World


Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Mollusca
Classis: Bivalvia
Subclassis: Heterodonta
Ordines: †Cycloconchidae - Hippuritoida - †Lyrodesmatidae - Myoida - †Redoniidae - Veneroida


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


These bivalves are distinguished by having the two halves of the shell equally sized, 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]

This subclass contains four extinct orders, five orders of living bivalves, and a group of as yet unassigned Euheterodonta:

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

2010 Taxonomy

In 2010 a new proposed classification system for the 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]
Order: Carditoida[6]

Superfamily: Carditoidea
Family: Carditidae
Family: Condylocardidae
Superfamily: Crassitelloidea
Family: Crassitellidae
Family: Astartidae

Infraclass: Euheterodonta[7]
Unassigned Euheterodonta[8]

Superfamily: Gastrochaenoidea
Family: Gastrochaenidae
Superfamily: Hiatelloidea
Family: Hiatellidae
Superfamily: Solenoidea
Family: Solenidae
Family: Pharidae

Order: Anomalodesmata[9]

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: Verticordidae
Family: Euciroidae

Order: Myoida[10]

Suborder: Myina
Superfamily: Myoidea
Family: Corbulidae
Family: Myidae
Superfamily: Pholadoidea
Family: Pholadidae
Family: Teredinidae

Order: Lucinoida[11]

Superfamily: Lucinoidea
Family: Lucinidae
Superfamily: Thyasiroidea
Family: Thyasiridae

Order: Veneroida[12]

Superfamily: Arcticoidea
Family: Arcticidae
Family: Trapeziidae
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: Kellidae
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


^ Heterodonta Neumayr, 1884. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=216 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 families. Pp. 113-133, in: Bouchet, P. & Rocroi, J.P. (2010), Nomenclator of Bivalve Families. Malacologia 52(2): 1-184
^ Archiheterodonta Giribet in Taylor, Williams, Glover & Dyal, 2007. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=382255 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 Dall, 1889. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=382256 on 3 August 2010.
^ Euheterodonta Giribet in Taylor, Williams, Glover & Dyal, 2007. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=382296 on 3 February 2009.
^ Unassigned Euheterodonta. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=382297 on 12 July 2009.
^ Anomalodesmata Dall, 1889. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=254 on 9 July 2010.
^ Myoida Stoliczka, 1870. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=245 on 9 July 2010.
^ Lucinoida Gray, 1854. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=489106 on 10 July 2010.
^ Veneroida Gray, 1854. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=217 on 9 July 2010.


Source: Wikipedia, Wikispecies: All text is available under the terms of the GNU Free Documentation License