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Suction-Feeding in Aeolosoma (Annelida)

Robert Singer
Transactions of the American Microscopical Society
Vol. 97, No. 1 (Jan., 1978), pp. 105-111
Published by: Wiley on behalf of American Microscopical Society
DOI: 10.2307/3225689
Stable URL: http://www.jstor.org/stable/3225689
Page Count: 7
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Suction-Feeding in Aeolosoma (Annelida)
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Abstract

The prostomium of Aeolosoma sp. permits an unusual type of suction-feeding. By placing the rounded prostomium over a soft substrate and lifting the ventral surface of the prostomium with unicellular dorsoventral suspensory muscle fibers, a partial vacoum is created which acts to lift particulate food off the substrate when water at a higher pressure is introduced along the prostomial margin. The ventral cilia can then sweep the food into the mouth. The development of suction-feeding permits the aeolosomatids to compete successfully in the ephemeral environment of decaying plant material.

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