Carapace formation of the podocopid ostracode Semicytherura species (Crustacea: Ostracoda) |
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Authors: | SHINNOSUKE YAMADA AKIRA TSUKAGOSHI NORIYUKI IKEYA |
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Affiliation: | a Department of Biology and Geosciences, Shizuoka University, Shizuoka, Japan |
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Abstract: | Details of ostracode carapace structures were examined by SEM and TEM. The podocopine ostracode Semicytherura kazahana has major ridges on the carapace surface and develops its prismatic layer inside the adult carapace. Electron microscopy at the final molt reveals that the major ridges arise from the highly dense formation of pits within the underlying swollen epidermis, and that disappearance of the epidermis in the presumptive area of the prismatic layer occurs after the calcification of the outer lamella cuticle, and just before synthesis of the membranous layer. These facts suggest that the formation of the carapace in Semicytherura takes place via a more complex process than that of the other podocopid ostracodes. |
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Keywords: | Carapace carapace formation Crustacea cuticle epidermis Ostracoda prismatic layer Semicytherura SEM TEM |
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