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A fine structural study of metamorphosis of the hydrozoan Mitrocomella polydiademata
Vicki Martin1, Fu-Shiang Chia2, Ron Koss2
1Department of Biology, University of Louisville, Kentucky 40292.
Abstract:
This report is a comprehensive fine structural analysis of the morphological changes occurring during metamorphosis of the marine hydrozoan Mitrocomella polydiademata. Five stages are recognized during metamorphosis: planulae just prior to settlement, ball and filiform stages, immature polyps, and primary feeding polyps. Settlement and metamorphosis of cnidarian planulae involve such changes as ciliary arrest, discharge of nematocytes, secretion of glandular cells, differentiation of cells, and changes in cell and body shape.
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