Coosina Temporal range: Dresbachian[1]
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Genus: | Coosina
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Coosina is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period.[1][2] It is one of the oldest fossils.