title: Sperm ultrastructure of the digenean Aphallus tubarium (Rudolphi, 1819) Poche, 1926 (Platyhelminthes, Cryptogonimidae) intestinal parasite of Dentex dentex (Pisces, Teleostei).
abstract: The ultrastructural organization of the spermatozoon of a cryptogonimid digenean, Aphallus tubarium, a parasite of Dentex dentex, is described. The spermatozoon possesses the elements found in other digeneans: two axonemes with 9+"1" pattern, a mitochondrion, a nucleus, cortical microtubules, external ornamentation and spine-like bodies. However, the mitochondrion appears as a cord with a bulge; this characteristic has never been described in other studied cryptogonimid and in other digeneans except in one lepocreadiid, Holorchis micracanthum. Likewise, the presence of a thin cytoplasm termination in the anterior part of the spermatozoon has never been pointed out in the cryptogonimids.
authors.affiliation: CNRS UMR 6134, University of Corsica, Parasites and Mediterranean Ecosystems Laboratory, Corte, France.
authors.forename: J
authors.initials: J
authors.lastname: Foata
authors.forename: Y
authors.initials: Y
authors.lastname: Quilichini
authors.forename: S
authors.initials: S
authors.lastname: Greani
authors.forename: B
authors.initials: B
authors.lastname: Marchand
mesh_terms: D000818:Animals; D054468:Axoneme / Q000648:ultrastructure; D008297:Male; D046529:Microscopy, Electron, Transmission; D008870:Microtubules / Q000648:ultrastructure; D008928:Mitochondria / Q000648:ultrastructure; D010473:Perciformes / Q000469:parasitology; D010986:Platyhelminths / Q000648:ultrastructure; D013094:Spermatozoa / Q000648:ultrastructure*; D014200:Trematoda / Q000648:ultrastructure