Crinoid Fossil Size:Large and thrilling plot lines
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Crinoid Fossil Size:Large and thrilling plot linesCrinoids are marine animals that are part of the phylum Echinodermata, which makes them relatives to starfish, sea urchins, and sea cucumbers. One of our oldest fossils, crinoids have lived in oceans since at least the Ordovician Era (485 million years ago). These fragments were part of their tube like stem, which served as their water vascular system. Crinoids were surprisingly resilient. They survived the Permian Period, which ended with the largest
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