Which organism was most likely to live at the same time as brachiopods?

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Which organism was most likely to live at the same time as brachiopods?

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Trilobites are the organism most likely to coexist with brachiopods. Brachiopods are the animals that had hard shells on the upper and lower surfaces. It comes under the Brachiopoda sanctuary. The lifespan of these animals is between three and thirty years. I hope the answer helps you.