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In a collection of pelecypods from deep water off the west coast of Africa, several specimens of a new species of the foraminifer, Rosalina, are attached to the umbonal area of the bivalve. In addition, numerous attachment scars are observed on the exterior surface with interconnected penetration scars on the interior surface of the valves. It is speculated that the foraminifer made the partial or complete penetration of the clam shell in connection with its search for calcium carbonate for shell-building. From the nature of the scars on the interior of the valves, it is clear that the clam was alive, because there are mounded up shell deposits around some of the openings and others are completely sealed shut by shell material deposited by the clam. ?? 1965.
Additional Publication Details
A new Rosalina (foraminifera) parasitic on a bivalve