Bryozoan genera by Alcide d'Orbigny

Clausa heteropora (d'Orbigny, 1850)
Scanning electron micrograph (pdt1730) showing proximal part of fertile branch with circular autozooidal apertures, defined by short peristomes, surrounded by polygonal kenozooids closed by terminal diaphragms
MNHN R61539a, d'Orbigny Collection, ?syntype, Cenomanian, Le Mans, Sarthe, France