Development and morphology of the glochidium larva of Anodonta cygnea (Mollusca: Bivalvia)


  • Elizabeth M. Wood

    1. Zoology Department, Chelsea College, University of London
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    • *Department of Biology, Goldsmiths' College, University of London, Lewisham Way, London.


The development of the parasitic glochidium larva of Anodonta cygnea L. is outlined, with reference to earlier studies on unionid larvae, and a comparison is made between the mature glochidia of the three genera, Anodonta, Unio, and Margaritifera.

The glochidium of Anodonta cygnea is anatomically and morphologically specialized in connection with its parasitic existence. The specialized structures are described, and their significance discussed.