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Leptodesma
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Category: Animals & Nature
Related Topics:
Silurian Period
bivalve
Devonian Period
fossil
Mississippian Subperiod
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Leptodesma, extinct genus of pelecypods (clams) found as fossils in Silurian to Lower Carboniferous rocks (between about 444 million and 318 million years old). Its distinct shell, roughly oval except for a sharp outgrowth that extends posteriorly, makes Leptodesma easy to identify. A troughlike flange connects the spinous outgrowth to the main body of the shell. Concentric growth lines are also present.

This article was most recently revised and updated by Richard Pallardy.