- Veneroida
Taxobox
name = Veneroida
image_width = 200px
image_caption = Empty cockle shell, family Cardiidae
regnum =Animal ia
phylum = Mollusca
classis =Bivalvia
subclassis =Heterodonta
ordo = Veneroida
subdivision_ranks = Families
subdivision = See text.The Veneroida or veneroids are an order of
bivalve mollusc s. They include some familiar forms such as saltwaterclam s and cockles, and a number offreshwater bivalves includingzebra mussel s.Veneroids are generally thick-valved, equal valved, and isomyarian (that is, their
adductor muscle s are of equal size). Three main hinge teeth are characteristic of the subclassHeterodonta to which this order belongs. Many species are active rather than sessile. However they tend to befilter feeder s, feeding through paired siphons, with a characteristic foldedgill structure adapted to that way of life.Recent work in
molecular systematics has suggested that this order is notmonophyletic . If this conclusion is sustained, the order will presumably be broken up in due course.Classification
* Superfamily
Veneroidea
**Petricolidae
**Veneridae
* Superfamily Astartoidea
**Astartidae
* SuperfamilyCorbiculoidea
**Corbiculidae
**Sphaeriidae
* SuperfamilyTellinoidea
**Donacidae
**Psammobiidae
**Semelidae
**Tellinidae
* Superfamily Arcticoidea
**Arcticidae
* SuperfamilyCardioidea
**Cardiidae
**Tridacnidae
* Superfamily Dreissenoidea
**Dreissenidae
* SuperfamilyGaleommatoidea
**Galeommatidae
**Lasaeidae
**Kelliidae
* SuperfamilyGlossoidea
**Glossidae
**Vesicomyidae
* SuperfamilyLucinoidea
**Cyrenoididae
**Fimbriidae
**Lucinidae
**Thyasiridae
**Ungulinidae
* Superfamily Mactroidea
**Mactridae
**Mesodesmatidae
* SuperfamilySolenoidea
**Pharidae
**Solenidae
* Superfamily Carditoidea
**Carditidae
**Condylocardiidae
* Superfamily Gastrochaenoidea
**Gastrochaenidae
* Superfamily Cyamioidea
**Cyamiidae
**Neoleptonidae
**Sportellidae
* Superfamily Chamoidea
**Chamidae
* Superfamily Crassatelloidea
**Crassatellidae External links
* [http://taxon.molgen.mpg.de/gettaxon?depth=3&pruneenv=&pruneunclass=&prune=10000&taxid=6580: Veneroida Taxonomy]
References
*
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