title: [Fine aspects of the process of fertilization in Acanthobothrium filicolle Zschokke, 1888 (Cestoda: Tetraphyllidea, Onchobothriidae)].
abstract: 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 crested body pass into the cytoplasm of the oocyte). For the first time it is shown that the oocyte eliminates a residue of fertilization that could be the result either from the rejection of all the sperm organites (axonemes, microtubules, crested body) or the polyspermy or both. This fertilization residue comprising a degenerated nucleuslike body has been observed only in Onchobothriidae, Tetraphyllidea Cestoda.
mesh_terms: D000818:Animals; D002589:Cestoda / Q000502:physiology*; D005260:Female; D005306:Fertilization; D008297:Male; D008854:Microscopy, Electron; D009865:Oocytes / Q000502:physiology* / Q000648:ultrastructure; D010057:Oviducts / Q000502:physiology; D010063:Ovum / Q000502:physiology*; D013094:Spermatozoa / Q000502:physiology* / Q000648:ultrastructure
vernacular_title: Particularités des processus de la fécondation chez Acanthobothrium filicolle Zschokke, 1888 (Cestoda: Tetraphyllidea, Onchobothriidae).