Acta Parasitologica

, Volume 57, Issue 1, pp 34–45 | Cite as

Spermiogenesis and ultrastructure of the spermatozoon of Wardula capitellata (Digenea, Mesometridae), an intestinal parasite of the sparid teleost Sarpa salpa in Senegal

  • Abdoulaye J. S. Bakhoum
  • Papa Ibnou Ndiaye
  • Aminata Sène
  • Cheikh Tidiane Bâ
  • Jordi Miquel
Article
  • 57 Downloads

Abstract

The spermiogenesis process in Wardula capitellata begins with the formation of a differentiation zone containing two centrioles associated with striated rootlets and an intercentriolar body. Each centriole develops into a free flagellum orthogonal to a median cytoplasmic process. Later these flagella rotate and become parallel to the median cytoplasmic process, which already exhibits two electron-dense areas and spinelike bodies before its proximodistal fusion with the flagella. The final stage of the spermiogenesis is characterized by the constriction of the ring of arched membranes, giving rise to the young spermatozoon, which detaches from the residual cytoplasm. The mature spermatozoon of W. capitellata presents most of the classical characters reported in digenean spermatozoa such as two axonemes of different lengths of the 9 + “1” trepaxonematan pattern, nucleus, mitochondrion, two bundles of parallel cortical microtubules and granules of glycogen. However, some peculiarities such as two lateral expansions accompanied by external ornamentation of the plasma membrane and spinelike bodies characterize the mature sperm. Moreover, a new spermatological character is described for the first time, the so-called cytoplasmic ornamented buttons.

Keywords

Wardula capitellata Mesometridae Digenea spermiogenesis spermatozoon ultrastructure 

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Copyright information

© © Versita Warsaw and Springer-Verlag Wien 2012

Authors and Affiliations

  • Abdoulaye J. S. Bakhoum
    • 1
    • 2
  • Papa Ibnou Ndiaye
    • 3
  • Aminata Sène
    • 3
  • Cheikh Tidiane Bâ
    • 3
  • Jordi Miquel
    • 1
    • 2
  1. 1.Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de FarmàciaUniversitat de BarcelonaBarcelonaSpain
  2. 2.Institut de Recerca de la Biodiversitat (IRBIO), Facultat de BiologiaUniversitat de BarcelonaBarcelonaSpain
  3. 3.Laboratoire de Parasitologie-Helminthologie, Département de Biologie Animale, Faculté des Sciences et TechniquesUniversité Cheikh Anta Diop de DakarDakarSénégal

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