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Biol Bull 163: 320-328. (October 1982)
© 1982 Marine Biological Laboratory
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FINE STRUCTURE OF A SCYPHOZOAN PLANULA, CASSIOPEIA XAMACHANA

VICKI J. MARTIN 1 and FU-SHIANG CHIA 2

1 Department of Biology, University of Louisville. Louisville, KY 40292
2 Department of Zoology, University of Alberta, Edmonton, Alberta, Canada T6G 2E9

Pre-metamorphic planulae of the scyphozoan Cassiopeia xamachana contain four cell types. The ectoderm consists of supportive cells and differentiating nematoblasts and nematocytes, while the endoderm consists of supportive cells and interstitial cells. Neural elements and glandular cells are absent in these planulae. Morphological similarities and differences that exist among hydrozoan, scyphozoan, and anthozoan planulae are discussed.

Submitted on February 26, 1982
Accepted on July 13, 1982




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[Abstract] [Full Text] [PDF]


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