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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 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)
In parenchyme cells of the parasitic Plathelminthe Diplectanum aequans virus-like cytoplasmic particles were observed. Their formation is noted in virogenic areas and they are often gathered in regular geometric arrangements. The infected cells show important lesions.
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)
Distinguishing characteristics include: - scolece divided into four distincty curled bilobed bothridia with marginal loculi, -anatomy without post vaginal tests, - lateral genital atrium always in posterior 1/4 of segments, - about 100 testes.
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)
The embryonic development from the egg to the oncosphere is examined in three Cestoda: Acanthobothrium coronatum (Rud., 1819), Acanthobothrium filicolle, Zschokke, 1888 and Acanthobothrium zschokkei Baer, 1948 (Tetraphyllidea, Onchobothriidae). The three ontogeneses have in common the following data: -- Two vitelline cells pass with the zygote into the… (More)