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Temporal range: Tremadocian–Recent[1]
Scientific classification edit
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Subclass: Heterodonta
Order: Anomalodesmata

See text.

Anomalodesmata is an order of saltwater clams, marine bivalve molluscs.[2] This grouping was formerly recognized as a taxonomic subclass.


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.[3]

2010 Taxonomy[edit]

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.[4]

Order Anomalodesmata


  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.
  2. ^ Anomalodesmata Stoliczka, Dall, 1889.  Retrieved through: World Register of Marine Species on 9 July 2010.
  3. ^ Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 431. ISBN 0-03-056747-5.
  4. ^ 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

External links[edit]