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Cidaris Echinoid Fossil Sea Urchin 37mm


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An excellent example of a fossilised prehistoric sea urchin Test (once the shell animals hard parts) exhibiting the detailed surface as described below.

Genus: Cidaris echinoid specimen.
Age: Mesozoic era, middle to upper Jurassic, approximately 170,000,000 - 150,000,000 years.
Origin: Agadir-Ida Ou Tanane Prefecture, Atlas Range, Morocco, North Africa.

Cidaris Echinoid measurements.
Diameter: 3.7 cm
Height: 2.0 cm

Approximate weight: 0,039 g

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A robust inflated test/shell of the Cidaris echinoid 00mm displaying what lies beneath the matrix, fossil sediments from the fossil bed still adhering to the test. The ambulacral areas and some tubercules can be seen. A good study display piece or a fossil sea urchin to attempt further cleaning, although this sediment is notoriously difficult to remove and probably is only possible with preparatory acids at an advanced level of preparatory skill.