FINE-STRUCTURE OF MUSCLE INSERTIONS ON LARVAL SHELL AND OPERCULUM OF NUDIBRANCH PHESTILLA-SIBOGAE (MOLLUSCA-GASTROPODA) BEFORE AND DURING METAMORPHOSIS
FINE-STRUCTURE OF MUSCLE INSERTIONS ON LARVAL SHELL AND OPERCULUM OF NUDIBRANCH PHESTILLA-SIBOGAE (MOLLUSCA-GASTROPODA) BEFORE AND DURING METAMORPHOSIS
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DOI：
10.1016/0040-8166(78)90013-7
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发表时间：
1978-01-01
期刊：
影响因子：
2.6
通讯作者：
BONAR, DB
中科院分区：
文献类型：
--
作者：
BONAR, DB
In Phestilla the attachment of the larval body to shell and operculum occurs at muscle insertion sites. Attachment zones are specialized areas of squamous epithelium wherein the cells contain structures considered to be cytoplasmic anchors. The anchors are intracellular organelles consisting of apical and basal hemidesmosomal plaques connected by bundles of tonofilaments which traverse the cells. Muscle-to-epithelium and epithelium-to-shell adhesion is probably due to an extracellular cement. At metamorphosis, both shell and operculum are lost. EM investigation of shell and opercular attachment sites during metamorphosis demonstrated that apical hemidesmosomes lose their integrity and tonofilament bundles pull away from the apical plasmalemma of the epithelial cells as the cells lose contact with the shell or operculum.
