Spermiogenesis and sperm ultrastructure of Deropristis Inflata Molin, 1859 (Digenea, Deropristidae), a parasite of Anguilla anguilla.

International audience To our knowledge, this paper describes the first ultrastructural results on spermiogenesis and the spermatozoon of a Digenea belonging to the family Deropristidae, Deropristis inflata. Spermiogenesis follows the usual pattern found in the digeneans, but a single noteworthy cha...

Full description

Bibliographic Details
Published in:Parasitology Research
Main Authors: Foata, Joséphine, Quilichini, Yann, Marchand, Bernard
Other Authors: Parasites et Ecosystèmes Méditerranéens (PEM), Centre National de la Recherche Scientifique (CNRS)-Université Pascal Paoli (UPP), Sciences pour l'environnement (SPE)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2007
Subjects:
MESH: Anguilla
MESH: Animals
MESH: Fish Diseases
MESH: Male
MESH: Microscopy
Electron
MESH: Spermatogenesis
MESH: Spermatozoa
MESH: Trematoda
MESH: Trematode Infections
[SDV.MP.PAR]Life Sciences [q-bio]/Microbiology and Parasitology/Parasitology
Anguilla anguilla
Online Access:https://hal.archives-ouvertes.fr/hal-00288882
https://doi.org/10.1007/s00436-007-0550-7
Description
Summary:International audience To our knowledge, this paper describes the first ultrastructural results on spermiogenesis and the spermatozoon of a Digenea belonging to the family Deropristidae, Deropristis inflata. Spermiogenesis follows the usual pattern found in the digeneans, but a single noteworthy characteristic concerns the centriole, which presents a "prominent pear-shaped electron-dense region." Spermiogenesis in D. inflata begins with the formation of a differentiation zone. The two centrioles give rise to flagella. These two flagella undergo a rotation of 90 degrees and fuse with the median cytoplasmic process. The proximo-distal fusion occurs at the level of attachment zones. The mature spermatozoon of D. inflata possesses five regions and presents all the features found in the digenean gamete. However, several characteristics allow us to distinguish the spermatozoon of D. inflata from other digenetic trematoda, namely the external ornamentations of the plasmic membrane, the anterior and posterior extremities. Furthermore, the distal part of the nucleus in front of those of the mitochondria appears such a distinctive criterion in the spermatozoon of this species. Our ultrastructural investigations produce new data on the reproduction of D. inflata, which may be useful for the understanding of the phylogenetic relationships in the Deropristidae family.

Similar Items