Ultrastructure of the male gamete of Brachylecithum eliomydis (Digenea, Dicrocoeliidae)—A parasite of Eliomys quercinus (Rodentia, Gliridae)

Bakhoum, Abdoulaye J.S.; Quilichini, Yann; Miquel, Jordi; Feliú, Carlos; Bâ, Cheikh Tidiane; Marchand, Bernard

doi:10.1016/j.jcz.2015.01.002

Cited by 3 publications

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“…The anterior extremity of the spermatozoon of N. truncatum has two axonemes surrounded by a continuous and submembranous layer of cortical microtubules. This arrangement has been described previously in other gorgoderoideans, namely Stephanostomoides tenuis, Brachylecithum eliomydis and Troglotrema acutum (Miquel et al 2006;Bakhoum, Quilichini, Justine et al 2015;Bakhoum, Quilichini, Miquel et al 2015). However, variability in the anterior extremity is evident in the Gorgoderoidea.…”

Section: Anterior Spermatozoon Extremitysupporting

confidence: 81%

“…To date, there are more or less complete spermatological studies in a large number of digeneans belonging to 18 superfamilies and more than 50 families (Justine 1995;Bakhoum et al 2017;Kacem and Miquel 2018;Ndiaye et al 2018). In the Gorgoderoidea published works on the ultrastructure of the spermatozoon involve the Acanthocolpidae, Allocreadiidae, Dicrocoeliidae, Paragonimidae and Troglotrematidae families (Robinson and Halton 1982;Orido 1988;Cifrian et al 1993;Agostini et al 2005;Miquel et al 2006;Quilichini, Foata, Orsini et al 2007;Bakhoum, Quilichini, Justine et al 2015;Bakhoum, Quilichini, Miquel et al 2015). According to the above- (Brachycoeliidae) and Collyricloides massanae (Collyriclidae) (see Bakhoum et al 2013Bakhoum et al , 2014 have not been considered for comparative purposes in the Gorgoderoidea.…”

Section: Introductionmentioning

confidence: 99%

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Sperm characters of the digeneanNephrotrema truncatum(Troglotrematidae): a kidney parasite ofCrocidura russula(Soricidae) and their phylogenetic significance

Diagne

Ndiaye

Bâ

et al. 2019

Invertebrate Reproduction & Development

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Spermatological characteristics of the troglotrematid digenean Nephrotrema truncatum, a parasite of Crocidura russula, have been investigated by means of transmission electron microscopy. The ultrastructural study reveals that the mature spermatozoon of N. truncatum exhibits many ultrastructural characters previously described in most gorgoderoideans. These are two axonemes of the 9+'1' trepaxonematan pattern, four attachment zones, a lateral expansion, an external ornamentation of the plasma membrane associated with spine-like bodies and cortical microtubules, and in the posterior part of the anterior spermatozoon region, two bundles of parallel cortical microtubules with the maximum number located in the anterior part of the spermatozoon, a nucleus, two mitochondria, and granules of glycogen. The obtained results are compared with those of other digeneans, particularly the Gorgoderoidea. The sperm cells gorgoderoideans are of type IV characterised by a 9+'1' pattern of axonemes, the presence of an external ornamentation associated with cortical microtubules and located in posterior area of the anterior extremity, the presence of two bundles of cortical microtubules, the maximum number of cortical microtubules located in the anterior region of the spermatozoon, and the presence of generally two mitochondria. However, dicrocoeliids and troglotrematids have spermatozoa with ornamentation of the plasma membrane and lateral expansions.

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Section: Anterior Spermatozoon Extremitysupporting

confidence: 81%