Ultrastructure of spermatogenesis and sperm development in Saccocoelioides godoyi Kohn &amp; Froes, 1986 (Digenea, Haploporidae)

Baptista-Farias, Mfd; Kohn, Anna; Cohen, Simone Chinicz

doi:10.1590/s0074-02762001000100007

Cited by 30 publications

(19 citation statements)

References 30 publications

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“…The general process of spermiogenesis of Carmyerius endopapillatus is similar to that described in many other digenean species (Burton 1972;Rees 1979;Daddow and Jamieson 1983;Erwin and Halton 1983;Gracenea et al 1997;Li and Wang 1997;Miquel et al 2000;Baptista-Farias et al 2001;Ndiaye et al 2002Ndiaye et al , 2003aNdiaye et al , b, 2004Levron et al 2003Levron et al , 2004aSeck et al 2007). Differentiation zone appears on the side of the spermatid, then a median cytoplasmic expansion and two flagella appear and develop.…”

Section: Discussionsupporting

confidence: 72%

Spermiogenesis and sperm ultrastructure of Carmyerius endopapillatus (Digenea, Gastrothylacidae), a parasite of Bos taurus in Senegal

Seck

Marchand

Bâ

2008

Acta Parasitologica

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Ultrastructural study of spermiogenesis and of the spermatozoon of Carmyerius endopapillatus has enabled to describe some characteristics of this digenea. The intercentriolar body situated between the two striated roots and the two centrioles, presents a symmetric organization. Both external bands of this intercentriolar body are made up of a row of granules. During spermiogenesis, a flagellar rotation of 90° is described. The old spermatid does not present external ornamentations. The spermatozoon is characterized, in its anterior region, by the presence of a lateral expansion exhibiting one spinelike body. In C. endopapillatus, external ornamentations are localized only at the level where the lateral expansion appears. The posterior extremity of spermatozoon exhibits a nucleus surrounded by a plasmic membrane lacking microtubules, but presenting a small lateral expansion. This is the first species of Gastrothylacidae family studied by transmission electron microscopy.

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Section: Discussionsupporting

confidence: 72%

Spermiogenesis and sperm ultrastructure of Carmyerius endopapillatus (Digenea, Gastrothylacidae), a parasite of Bos taurus in Senegal

Seck

Marchand

Bâ

2008

Acta Parasitologica

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“…The general structure of spermiogenesis in D. brusinae is similar to that described in most of digeneans (Burton 1972;Rees 1979;Erwin and Halton 1983;Hendow and James 1988;Cifrian et al 1993;Miquel et al 2000;Baptista-Farias et al 2001;Ndiaye et al 2002Ndiaye et al , 2003aNdiaye et al , 2003bLevron et al 2003Levron et al , 2004. It begins with the formation of a differentiation zone at the periphery of each young spermatid.…”

Section: Discussionsupporting

confidence: 66%

Spermiogenesis and sperm ultrastructure of Diphterostomum brusinae (Digenea, Zoogonidae), a parasite of Diplodus annularis (Pisces, Teleostei)

2004

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This paper constitutes the first ultrastructural study of spermiogenesis and the spermatozoon of a Digenea belonging to the family Zoogonidae, Diphterostomum brusinae. Spermiogenesis follows the general pattern found in the digeneans. It begins with the formation of a differentiation zone in the spermatid. 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. brusinae presents all the features found in the digeneans gametes: two axonemes, mitochondrion, nucleus and two bundles of parallel cortical microtubules. Nevertheless, several characteristics distinguish the spermatozoon of D. brusinae from other digeneans, in particular the external ornamentations of the plasma membrane and the anterior and posterior extremities. The description of the ultrastructural features of reproduction in this species would contribute to the understanding of the phylogenetic relationships in the Zoogonidae family.

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“…Spermiogenesis Spermiogenesis in D. hospes follows the general pattern described for other digenean species (Mohandas 1983;Orido 1988;Stitt and Fairweather 1990;Gracenea et al 1997;Miquel et al 2000;Baptista-Farias et al 2001;Ndiaye et al 2003a). The presence of two centrioles and striated rootlets and also a proximodistal fusion are general characteristics of parasitic Platyhelminthes Ase anterior spermatozoon extremity, Ax axoneme, Ce cytoplasmic expansion, Cm cortical microtubules, D doublets, Eo extramembranar ornamentation, G granules of glycogen, Mt (number) mitochondria, N nucleus, n several, Pse posterior spermatozoon extremity, Sb spine like bodies.…”

Section: Discussionsupporting

confidence: 57%

Dicrocoelium hospes Looss, 1907 (Digenea, Dicrocoeliidae): spermiogenesis, mature spermatozoon and ultrastructural comparative study

et al. 2005

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This work describes the first ultrastructural results on spermiogenesis and on the mature spermatozoon of Dicrocoelium hospes (Trematoda, Digenea) collected in Bos indicus from Senegal (Africa). Examination of this species was processed by TEM. Spermiogenesis follows the general pattern found in the digenean, but reveals a particularity consisting of the appearance of glycogen granules in the late spermatids within the testes. The mature spermatozoon possesses five distinct regions and presents all features found in Digenea gametes: two axonemes, mitochondria, nucleus and parallel cortical microtubules. However, several characters allow us to distinguish D. hospes from other digenetic trematodes within the Dicrocoeliidae family. In fact, we observed several structures that are absent in the other species of Dicrocoeliidae studied until now, such as: a cytoplasmic expansion, extramembranar ornamentation, spine-like bodies and two parallel mitochondria in the mature sperm. Moreover, additional particular characteristics were observed in this species in both extremities of the spermatozoon. This work produced new data on the ultrastructure of this trematode family which may be useful for phylogenetic purposes.

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Ultrastructure of spermatogenesis and sperm development in Saccocoelioides godoyi Kohn & Froes, 1986 (Digenea, Haploporidae)

Cited by 30 publications

References 30 publications

Spermiogenesis and sperm ultrastructure of Carmyerius endopapillatus (Digenea, Gastrothylacidae), a parasite of Bos taurus in Senegal

Spermiogenesis and sperm ultrastructure of Carmyerius endopapillatus (Digenea, Gastrothylacidae), a parasite of Bos taurus in Senegal

Spermiogenesis and sperm ultrastructure of Diphterostomum brusinae (Digenea, Zoogonidae), a parasite of Diplodus annularis (Pisces, Teleostei)

Dicrocoelium hospes Looss, 1907 (Digenea, Dicrocoeliidae): spermiogenesis, mature spermatozoon and ultrastructural comparative study

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