Anomalodesmata is an superorder 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 85,000 extant species of molluscs are recognized. The number of fossil species is estim ...

. This grouping was formerly recognised as a taxonomic subclass. It is called a superorder in the current

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 specialis ...

, despite having no orders, to parallel it with sister taxon Imparidentia, which does have orders.

Description

Wood1815 General Conchology pl 18 fig 1 Thracia convexa

The shells of species in this order are of equal size, as are the muscles that hold them closed, and the margins at the hinges are thickened. The margins of the mantle are also fused, and there is only a single hinge tooth, if any.

Families

In 2010, a new proposed classification system for the Bivalvia was published in ''

Malacologia ''Malacologia'' is a peer-reviewed scientific journal in the field of malacology, the study of mollusks. The journal publishes articles in the fields of molluscan systematics, ecology, population ecology, genetics, molecular genetics, evolu ...

'' by Bieler, Carter & Coan revising the classification of the Bivalvia, including the order Anomalodesmata.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 The following tree is their info which has been updated with the latest information from the

: Order: Anomalodesmata *Superfamily: Clavagelloidea **Family: Clavagellidae **Family: Penicillidae *Superfamily: Cuspidarioidea ** Family: Cuspidariidae ** Family: Halonymphidae ** Family: Protocuspidariidae ** Family: Spheniopsidae *Superfamily: Myochamoidea **Family: Cleidothaeridae **Family: Myochamidae *Superfamily: Pandoroidea ** Family: Lyonsiidae ** Family: Pandoridae *Superfamily: Pholadomyoidea ** Family: † Arenigomyidae ** Family: † Margaritariidae ** Family: Parilimyidae ** Family: Pholadomyidae ** 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 ** 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 ...

References

* Powell A W B, ''New Zealand Mollusca'', William Collins Publishers Ltd, Auckland, New Zealand 1979

External links

* Bivalve orders {{bivalve-stub