21559 - Tower Eyed 2.33 Inch Erbenochile issoumourensis Lower Devonian Kettneraspis United States ( Delaware
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Description
United States ( Delaware
dunklei there were two to five barbs on each tooth
Weight (in a whole): 29
the optical constants
Agassiz and Desor 1846 (sea urchin)
21559 - Tower Eyed 2.33 Inch Erbenochile issoumourensis Lower Devonian Kettneraspis United States ( DelawareSpectacularly well detailed specimen. It has been carefully prepared during a long laboratory process. Impressive eyes facets. Finest Quality specimen. Extremely rare and interesting species. With an exaggerated development of the eyes. Probably as an adaptation for a panoramic view of its environment and as a mechanism to quickly detect possible predators. Of course, many of the spines during the preparation process have been fractured and glued
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