21559 - Tower Eyed 2.33 Inch Erbenochile issoumourensis Lower Devonian Kettneraspis Weight (in a whole): 29

Weight (in a whole): 29

-A new species of Argillochelys (Testudines: Cryptodira: Cheloniidae) from the Ouled Abdoun phosphate basin

Agassiz and Desor 1846 (sea urchin)

Subtaxa: Symphysops djebaglensis

the optical constants

21559 - Tower Eyed 2.33 Inch Erbenochile issoumourensis Lower Devonian Kettneraspis Weight (in a whole): 29Spectacularly 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