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Palaeoheterodonta: Wikis

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Paleoheterodonta
Anodonta anatina
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Subclass: Paleoheterodonta
Orders

Trigonioida
Unionoida

Paleoheterodonta is a subclass of bivalve molluscs. It contains the extant order Unionoida (freshwater mussels) and the prehistoric Trigonioida. They are distinguished by having the two halves of the shell be of equal size and shape, but by having the hinge teeth be in a single row, rather than separated into two groups, as they are in the clams and cockles.[1]

References

  1. ^ Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 340. ISBN 0-03-056747-5.  

the mussels are closely related with mollusks


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