Sea Urchin
Lovenechinus missouriensis
Paleobiology
Paleobiology
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Sand Dollar
Clypeaster sunnilandensis
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Sand Dollar
Protoscutella mississippiensis
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Sea Urchin
Rhyncholampas evergladensis
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Heart Urchin
Schizaster armiger
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Heart Urchin
Eupatagus antillarum
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Sea Urchin
Hardouinia mortonis
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Sea Urchin
Hemiaster cranium
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Sand Dollar
Periarchus lyelli pileussinensis
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Sand Dollar
Encope tamiamiensis
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Crinoid
Uintacrinus socialis
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Feather Star
Onychocrinus ramulosus