Spinadiscus Ordovician Edrioasteroid

Spinadiscus lefebvrei

Phylum Echinodermata, Class Edrioasteroidea

Geological Time: Ordovician

Size: The Edirioasteroid is 5/8”in diameter on a small plate

Fossil Site: Tiouririne Formation, Melissi, Morocco

Fossil Code: PFO427

Price: $50.00


Spinadiscus Ordovician EdrioasteroidDescription: This rough sandstone plate contains one complete individual. The specimen is bright orange and displays excellent detail.

The Edrioasteroids are an extinct class of echinoderm that arose in the Ediacaran and persisted into the Permian periods of geologic time, about 300 million years ago. The animals usually consisted of a disk-like upper body made of many plates. The main feature was the presence of five arms, or ambulacra, contained in the body wall radiating from the central mouth outwards. The mode of life was sessile.

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