Atrypida

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).

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