Fadhila Mokhtar-Maamouri

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The processes of spermatogenesis and spermiogenesis in the Pseudophyllidea Cestode Bothriocephalus clavibothrium were studied by light and electron microscopy. Spermatogenesis is for rosette type. The rosettes of secondary, tertiary and quaternary spermatogonia, primary and secondary spermatocytes and spermatid clusters are all resulting of a series of six(More)
The spermiogenesis is characterized by the following steps: (1) Formation of the differentiation zone and appearance of an intercentriolar body with two basal bodies. (2) Formation of a cytoplasmic expansion and induction of only one flagellum. (3) Rotation of the flagellum and its fusion with the cytoplasmic expansion. (4) Nucleus migration towards the(More)
The spermiogenesis of the Onchobothriidae Tetraphyllidea A. filicolle filicolle is similar to that of the other Onchobothriidae. In this study, it is proved that: --the longitudinal displacement of the axonemes seen in the spermatozoon results from the sliding of one of the two axonemes during spermiogenesis. --the basal bodies and their attached rootlets(More)
The vitellogenesis in Echeneibothrium beauchampi is studied by means of electron microscopy. In the follicles, the vitelline cells undergo three progressive changes characterized by cellular size, membrane system development and nature of stored inclusions. 1. Immature cells have a gonial morphology. 2. Maturing cells display a very well developed membrane(More)
The comparison of the ultrastructure of spermatozoa in Cestodes from seven different orders shows that they have the same general pattern of organization. The main common features are following: (a) a long thread-like body; (b) an elongated nucleus; (c) cortical microtubules underlying plasma membrane; (d) the absence of mitochondria and of a typical(More)
Caulobothrium longicolle (Linton, 1890) and Phyllobothrium gracile (Weld, 1855) (Cestoda: Tetraphyllidea, Phyllobothriidae) have the same embryonic development with the following characteristic data: --a small number of vitelline cells (2 or 3) pass with the zygote in the ootype;--a non operculate thin egg-shell;--the entire and equal zyhote cleavage(More)
Description de deux espèces de Cestodes Nematotaeniidae prélevées chez des Bufonidae en Tunisie. Nematotaenia viride n. sp., parasite deBufo viridis Laurenti, 1768, est caractérisé par: une section transversale quadrangulaire, légèrement plus haute que large; une petite poche du cirre (50 × 20 μm) entièrement contenu dans la région corticale; une couche(More)
The electron microscopy study of fertilization points out that in the Cestode Acanthobothrium filicolle, fertilization occurs in the oviduct. After the coiling of the spermatozoon around the oocyte, the plasma membrane of the sperm fuses with that of the ovum. All the elements of the spermatozoon (the nucleus, the two axonemes, the microtubules and the(More)