Cheap Bivalve Fossils Echinoderm Ordovician

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Ordovician
Location - Ouzina, Morocco
Size of matrix - 80x67mm max.
An early relative to sea urchins and echinoderms, these animals are thought to be more internal specialisation than jellyfish (eldoniods have a gut like structure, jelly fish do not) and a leathery skin that allowed preservation in some circumstances.
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