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Bidiastopora d'Orbigny, 1849


Scanning electron micrograph of autozooids of Bidiastopora cervicornis showing terminal diaphragms closing the apertures.

Bidiastopora cervicornis (Michelin, 1846)
Scanning electron micrograph (pdt 0847) showing a group of occluded autozooids
MNHN Michelin Collection R61247, Bathonian, Ranville