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Cedaria
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Cedaria

trilobite genus
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trilobite

Cedaria, genus of trilobites (extinct arthropods) that is a useful index fossil for Cambrian rocks and time (about 542 million to 488 million years ago). Cedaria was small, with a well-developed tail section and a prominent head section.

This article was most recently revised and updated by John P. Rafferty.
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