Anomalodesmata

Anomalodesmata is an order of saltwater clams, marine bivalve molluscs.[2] 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 parallel it with sister taxon Imparidentia, which does have orders.[3]

Anomalodesmata
Temporal range: Tremadocian–0[1]
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Subclass: Heterodonta
Order: Anomalodesmata
Dall, 1889
Families

See text.

Synonyms

Anomalodesmacea
Pholadomyida
Pholadomyoida

Description

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.[4]

Families

In 2010, a new proposed classification system for the Bivalvia was published in Malacologia by Bieler, Carter & Coan revising the classification of the Bivalvia, including the order Anomalodesmata.[5] The following tree is their info which has been updated with the latest information from the World Register of Marine Species:

Order: Anomalodesmata

References
  1. Sánchez, T. M.; Vaccari, N. E. (2003). "Ucumariidae new family (Bivalvia, Anomalodesmata) and other bivalves from the Early Ordovician (Tremadocian) of northwestern Argentina". Ameghiniana. 40 (3): 415–424. doi:10.5710/amgh.v40i3.969 (inactive 2021-01-16).CS1 maint: DOI inactive as of January 2021 (link)
  2. World Register of Marine Species link: Anomalodesmata Dall, 1889 (+species list)
  3. World Register of Marine Species link: Imparidentia Bieler, P. M. Mikkelsen & Giribet, 2014 (+species list)
  4. Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 431. ISBN 0-03-056747-5.
  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


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