Image: Echinosphaerites
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Description: The Ordovician cystoid Echinosphaerites (an extinct echinoderm) from northeastern Estonia; approximately 5 cm in diameter.
Title: Echinosphaerites
Credit: Photograph taken by Mark A. Wilson (Department of Geology, The College of Wooster). [1]
Author: Wilson44691 at English Wikipedia
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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