Ultrastructural study of the spermatozoon of Pronoprymna ventricosa (Digenea, Baccigerinae), parasite of the twaite shad Alosa fallax Lacepede (Pisces, Teleostei)

In this paper, we describe the ultrastructural organisation of the spermatozoon of a Digenea Baccigerinae Pronoprymna ventricosa. This spermatozoon possesses the elements found in the others digeneans: two axonemes with 9 + “1” pattern, a mitochondrion, a nucleus, cortical microtubules and external...

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Bibliographic Details
Published in:Parasitology research (1987) 2007-09, Vol.101 (4), p.1125-1130
Main Authors: Quilichini, Yann, Foata, Josephine, Marchand, Bernard
Format: Article
Language:English
Subjects:
Alosa fallax lacepede
Animals
Baccigerinae
Biological and medical sciences
Digenea
Fish Diseases
Fish Diseases - parasitology
Fishes
Fishes - parasitology
Freshwater
Fundamental and applied biological sciences. Psychology
General aspects
General aspects and techniques. Study of several systematic groups. Models
Invertebrates
Life Sciences
Male
Microbiology and Parasitology
Nemathelminthia. Plathelmintha
Parasitology
Spermatozoa
Spermatozoa - ultrastructure
Trematoda
Trematoda - ultrastructure
Trematode Infections
Trematode Infections - parasitology
Trematode Infections - veterinary
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Summary:In this paper, we describe the ultrastructural organisation of the spermatozoon of a Digenea Baccigerinae Pronoprymna ventricosa. This spermatozoon possesses the elements found in the others digeneans: two axonemes with 9 + “1” pattern, a mitochondrion, a nucleus, cortical microtubules and external ornamentations. However, this spermatozoon presents two particularities. The first is the presence of a single field of cortical microtubules disposed in the ventral side (mitochondrion side) of the spermatozoon. In the other digeneans, two fields of cortical microtubules are observed between the two axonemes. The second is the presence of external ornamentations not associated with cortical microtubules. These two points have, to our knowledge, never been described in another digenean. Moreover, a separation in two groups of the digenean spermatozoa is proposed in relation to the localisation of the external ornamentations. We propose to distinguish a first group exhibiting these elements in the proximal part of the spermatozoon and a second one with external ornamentations in a second part of the gamete.
ISSN:0932-0113
1432-1955
DOI:10.1007/s00436-007-0599-3