Ordovician Hyolithid from Fezouata Formation

Survivor of the end Cambrian extinction - Part and Counterpart

Hyolithes sp

Class Hyolitha, Order Hyolithida, Family Uncertain

Geological Time: Lower Ordovician

Size: Fossil is 15 mm long by 7 mm wide on a 190 mm by 125 mm and 35 mm by 60 mm matrix pair.

Fossil Site: Upper Fezouata Formation, Draa Valley, Zagora, Morocco

Code: 16173

Price: Sold


Ordovician Hyolithid FossilDescription: With the discovery of an exceptionally diverse biota in the Lower Ordovician Fezouata Formation near Zagora, Morocco a pantheon of taxa were discovered that appeared to have their affinities with Early and Middle HyolithidCambrian deposits from Chengjiang, China and the Burgess Shale of Canada. This is a member of the Hyolitha, a phylum with problematic affinities, thought to be related to the mollusks. They are thought to have lived on the substrate, resting on the flatter side of the shell for stability. The two stabilizing structures are termed the Helens (named by C.D Walcott of Burgess Shale fame for his daughter). They can be seen on each half of the matrix, albeit unevenly preserved with one more detailed than the other on each side. This is the only such example I have been able to secure.

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