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Clausa d'Orbigny, 1853


Scanning electron micrograph of growing tip of Clausa heteropora.

Clausa heteropora (d'Orbigny, 1850)
Scanning electron micrograph (pdt1735) showing corroded growing tip
MNHN R61539b, d'Orbigny Collection, ?syntype, Cenomanian, Le Mans, Sarthe, France