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JOURNAL OF PLANKTON RESEARCH | VOLUME 14 | NUMBER 3 | PAGES 423-433 | 1992
© Oxford University Press

research-article

Unusual swimming mechanism in Calycopsis borchgrevinki (Hydrozoa)

S. van der Spoel

Institute of Taxonomic Zoology, University of Amsterdam The Netherlands

Received on March 25, 1991; accepted on August 12, 1991 Calycopsis borchgrevinki (Browne, 1910) from Antarctic waters was studied histologically. The entire bell is enclosed in a chitin-like skin, supported by chitin-like rods in the radial mesogleal fibres. In the tentacles a thick mesogloea is present without chitinous structures. The gonads are embedded in the stomach folds. It is postulated that these characters are adaptations to ecological conditions in Antarctic waters.


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