Invemar
Bulletin of Marine and Coastal Research

THE LITTLE BIVALVE Planktomya UNMASKED

Donald R. Moore

Abstract


The enigmatic bivalve Planktomya henseni has masqueraded as a holoplanktonic animal for nearly a century. Allen and Scheltema (1972) showed that all the evidence pointed to a benthic clam with an unusually long planktonic larval stage. This benthic clam has finally been found in the tropical western Atlantic, and appears to be a member of the Family Sportellidae. Comparison with fossil species in this family shows a trend toward a large prodissoconch and apparently a long planktonic larval stage

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DOI: 10.25268/bimc.invemar.1983.13.0.486

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