title: Ultrastructural study of the male gamete of Pleurogonius truncatus Prudhoe, 1944 (Platyhelminthes, Digenea, Pronocephalidae) parasite of Eretmochelys imbricata (Linnaeus, 1766).
abstract: In Pronocephaloidea, the spermatozoa of only two species have been studied today. Because of this, we present in this work data concerning to a third specie, Pleurogonius truncatus Prudhoe, 1944. The mature spermatozoon of P. truncatus possesses two axonemes with the 9+"1" pattern typical of Trepaxonemata, mitochondrion, nucleus, parallel cortical microtubules, spinelike bodies, cytoplasmic expansion and an external ornamentation of the plasma membrane. A particularity of the spermatozoon of P. truncatus is in the ultrastructure of the anterior spermatozoon extremity with only cortical microtubules and ornamentation of the plasma membrane. This type of anterior extremity has never been described until today in Pronocephaloidea. On the other hand, the ultrastructure of the posterior extremity of the spermatozoon confirms that already described in Pronocephalidae.
authors.affiliation: Laboratory of Evolutionary Biology, Ecology and Management of Ecosystems, Faculty of Sciences and Techniques, Cheikh Anta Diop University of Dakar, BP 5055, Dakar, Senegal.
authors.forename: Papa Ibnou
authors.initials: PI
authors.lastname: Ndiaye
authors.forename: Yann
authors.initials: Y
authors.lastname: Quilichini
authors.forename: Aminata
authors.initials: A
authors.lastname: Sène
authors.forename: Vasyl V
authors.initials: VV
authors.lastname: Tkach
authors.forename: Cheikh Tidiane
authors.initials: CT
authors.lastname: Bâ
authors.forename: Bernard
authors.initials: B
authors.lastname: Marchand
mesh_terms: D000818:Animals; D054468:Axoneme / Q000648:ultrastructure; D002462:Cell Membrane / Q000648:ultrastructure; D002590:Cestode Infections / Q000469:parasitology*; D003593:Cytoplasm / Q000648:ultrastructure; D006003:Glycogen / Q000378:metabolism; D008297:Male; D046529:Microscopy, Electron, Transmission; D008870:Microtubules / Q000648:ultrastructure; D008928:Mitochondria / Q000648:ultrastructure; D010986:Platyhelminths / Q000648:ultrastructure*; D013094:Spermatozoa / Q000648:ultrastructure*; D013270:Stomach / Q000469:parasitology; D014426:Turtles / Q000469:parasitology*
chemical_list: D006003:Glycogen