Friday, March 27, 2015

Tetrarhynchia tetraedra brachiopod from France

Tetrarhynchia tetraedra is a Rhynchonellid with a triangular shaped shell and strong plications that are reflected in the margins of the shell. There is a strong, wide sulcus with multiple plications as well. The specimen below comes from Moselle Department, France and dates to the Plienbachian stage of the Jurassic.

Pedicle valve
Brachial valve

Thank you to Gery for the great fossil!

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