Spermatogenesis and spermiogenesis in Didymocystis wedli Ariola, 1902 (Didymozoidae, Digenea)

Pamplona-Basilio, Maria Clara; Baptista-Farias, Maria de Fatima Diniz; Kohn, Anna

doi:10.1590/s0074-02762001000800021

Cited by 45 publications

(14 citation statements)

References 11 publications

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“…In other studies of Digenea spermiogenesis, the intercentriolar body can be totally absent (Justine and Mattei 1983;Pamplona-Basilio et al 2001), or may contain fewer electron-dense layers (Robinson and Halton 1982;Gracenea et al 1997Gracenea et al , 2000Levron et al 2003). In most cases, however, this structure is not mentioned.…”

Section: Discussionmentioning

confidence: 92%

“…Several studies have been performed, particularly concerning the Eucestoda (Baˆand Marchand 1995;Justine 2001). In the Digenea, sperm ultrastructure has been described for only 48 genera (Justine 1995; Gracenea et al 1997;Tang et al 1998;Miquel et al 2000;Baptista-Farias et al 2001;Pamplona-Basilio et al 2001;Ndiaye et al 2002Ndiaye et al , 2003aLevron et al 2003). A strong phylogenetic model has not been established in the Digenea because of this lack of data.…”

Section: Introductionmentioning

confidence: 99%

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Ultrastructure of spermiogenesis and the spermatozoon of Monorchis parvus Looss, 1902 (Digenea, Monorchiidae), a parasite of Diplodus annularis (Pisces, Teleostei)

Levron

Ternengo

Marchand

2004

Parasitology Research

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The present paper describes the characteristic ultrastructural features of spermiogenesis and the spermatozoon of Monorchis parvus (Trematoda, Digenea, Monorchiidae). This spermiogenesis is characterized by a flagellar rotation of about 120 degrees and the formation of a novel ultrastructural element: a centriolar extension. It nevertheless follows the general pattern of digeneans. It begins with the formation of a differentiation zone, comprising striated rootlets associated with two centrioles and an intercentriolar body. The mature spermatozoon presents features allowing the distinction between M. parvus and other digenetic trematodes. It possesses an original anterior extremity. The two central elements of the axonemes appear prior to the peripheral doublets. The external ornamentations of the cell membrane are formed parallel to the central elements. Another peculiarity of the male gamete is the presence of two mitochondria. M. parvus, therefore, differs distinctly from other digenetic trematodes.

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Section: Discussionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Ultrastructure of spermiogenesis and the spermatozoon of Monorchis parvus Looss, 1902 (Digenea, Monorchiidae), a parasite of Diplodus annularis (Pisces, Teleostei)

Levron

Ternengo

Marchand

2004

Parasitology Research

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“…This is the case of the faustulid Pronoprymna ventricosa (Quilichini et al, 2007a), the hemiurids L. excisum and P. merus (Ndiaye et al, 2012a(Ndiaye et al, , 2013 and the lecithasterid A. laguncula (Quilichini et al, 2010a). Moreover, the absence of cortical microtubules was reported in the mature spermatozoon of schistosomes and some didymozoids (Justine and Mattei, 1984a;Justine et al, 1993;Pamplona-Basilio et al, 2001).…”

Section: Number and Arrangement Of Cortical Microtubulesmentioning

confidence: 98%

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

Bakhoum

Quilichini

Miquel

et al. 2015

Zoologischer Anzeiger - A Journal of Comparative Zoology

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“…Considerable attention has been paid in recent years to the ultrastructure of spermiogenesis and spermatozoon in parasitic Plathyhelminthes (Justine 1991(Justine , 1995Bâ and Marchand 1995;Gracenea et al 1997;Tang et al 1998;Miquel et al 2000;Baptista-Farias et al 2001;Pamplona-Basilio et al 2001;Ndiaye et al 2002Ndiaye et al , 2003aLevron et al 2003;Agostini et al 2005), helping to elucidate phylogenetic relationships within group. But in the present work, it was not possible as neither members of superfamily nor of the family have ever been studied.…”

Section: Introductionmentioning

confidence: 99%

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

Foata

Quilichini²,

Marchand³

2007

Parasitol Res

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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.

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Spermatogenesis and spermiogenesis in Didymocystis wedli Ariola, 1902 (Didymozoidae, Digenea)

Cited by 45 publications

References 11 publications

Ultrastructure of spermiogenesis and the spermatozoon of Monorchis parvus Looss, 1902 (Digenea, Monorchiidae), a parasite of Diplodus annularis (Pisces, Teleostei)

Ultrastructure of spermiogenesis and the spermatozoon of Monorchis parvus Looss, 1902 (Digenea, Monorchiidae), a parasite of Diplodus annularis (Pisces, Teleostei)

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

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

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