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Daonella
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Daonella

fossil mollusk
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Article History
Related Topics:
bivalve
Triassic Period
fossil

Daonella, genus of extinct pelecypods (clams) useful as a guide, or index, fossil in Triassic rocks. The shell is characterized by a wide dorsal region and by fine radiating riblike lineations. The shell is circular in outline and may show fine growth lines.

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