Cell and Tissue Research

, Volume 201, Issue 3, pp 361–368 | Cite as

Ultrastructural observations on the oogenesis of Triops cancriformis (Crustacea, Notostraca)

II. Early developmental stages of the oocyte
  • Franca Sabelli Scanabissi
  • Massimo Trentini


The first stages of the oogenesis of Triops cancriformis have been studied. At the outset the oocyte is smaller than the nurse cells. Meiosis begins with typical synaptonemal complexes. The significance of these complexes and of some other peculiar structures of germ cells, i.e., pore complexes and annuli within the nucleus, and annulate lamellae within the cytoplasm are discussed. The morphofunctional uniformity of some cytoplasmic structures (annulate lamellae, concentrically arranged ER, and yolk globules) in the oocyte as well as its nurse cells is also discussed.

Key words

Oogenesis Synaptonemal complexes Annulate lamellae Notostraca (Triops cancriformis


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Copyright information

© Springer-Verlag 1979

Authors and Affiliations

  • Franca Sabelli Scanabissi
    • 1
  • Massimo Trentini
    • 1
  1. 1.Institute of ZoologyUniversity of BolognaItaly

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