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Atrypida
Order of extinct brachiopods From Wikipedia, the free encyclopedia
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Atrypida is an extinct order of rhynchonelliform brachiopods. They first appeared in middle Ordovician and survived the Ordovician-Silurian extinction, becoming the dominant brachiopods of the Silurian alongside the order Pentamerida.[3][4] They would survive into the Late Devonian before going extinct at the end of the Frasnian (Late Devonian).[2]
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