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Title: First spermatological study in the Atractotrematidae (Digenea, Haploporoidea): the case of Atractotrema sigani, intestinal parasite of Siganus lineatus
Author: Bakhoum, Abdoulaye Jacque Sacodou
Quilichini, Yann
Justine, Jean-Lou
Bray, Rodney A.
Miquel Colomé, Jordi
Feliu José, Carlos
Bâ, Cheikh Tidiane
Marchand, Bernard
Keywords: Filogènia
Ultraestructura (Biologia)
Ultrastructure (Biology)
Issue Date: 2015
Publisher: EDP Sciences
Abstract: The ultrastructural organization of the mature spermatozoon of the digenean Atractotrema sigani(from Siganus lineatus off New Caledonia) was investigated by transmission electron microscopy. The male gamete of A. sigani exhibits the general morphology described in digeneans with the presence of two axonemes of different lengths showing the 9 + '1' pattern of the Trepaxonemata, a nucleus, two mitochondria, two bundles of parallel cortical microtubules, external ornamentation, spine-like bodies and granules of glycogen. However, the mature spermatozoon of A. sigani has some specific characters such as the morphology of its anterior region and the submembranous electron-dense material. Although similar structures have been reported in some digenean species, the presence of a submembranous electron-dense material describing a complete ring is reported here for the first time in the mature spermatozoon of A. sigani. In addition, sperm characteristics are compared between the Haploporoidea and their supposed close superfamilies, and possible phylogenetic implications of these findings for the Digenea are discussed.
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It is part of: Parasite, 2015, vol. 22, num. 26, p. 1-10
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ISSN: 1252-607X
Appears in Collections:Articles publicats en revistes (Biologia, Sanitat i Medi Ambient)

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