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  • Title: Oogenesis in Campodea sp. (Insecta, Diplura): chorion formation and the ultrastructure of follicle cells.
    Author: Biliński S.
    Journal: Cell Tissue Res; 1983; 228(1):165-70. PubMed ID: 6831522.
    Abstract:
    During advanced vitellogenesis the follicle cells of Campodea sp. are well developed and contain numerous electron-dense secretory vacuoles. In the postvitellogenic phase the contents of these vacuoles are released from follicle cells and give rise to a thin chorion on the oocyte surface. Concurrently, segregation of yolk spheres takes place in the ooplasm: small spheres migrate to the oocyte periphery and come to lie in the so-called peripheral zone of cytoplasm, whereas large spheres remain in the cell centre.
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