Structure and ultrastructure of spermatozoa of Chrysomya megacephala (Diptera: Calliphoridae)

Name, Khesller Patrícia Olázia; Pujol-Luz, José Roberto; Báo, Sônia Nair

doi:10.1016/j.micron.2010.04.015

Cited by 17 publications

(35 citation statements)

References 32 publications

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“…However, the number of follicles present in the interior of the testes varies considerably among the various groups. In C. megacephala (Name et al,2010) and in the species studied here, L. cuprina , and L. eximia , only one follicle was observed per testis.…”

Section: Discussionmentioning

confidence: 59%

“…The accessory glands are tubular and very long, and their content has a milky aspect in L. cuprina and L. eximia . In C. megacephala , the same aspect is observed, but the accessory glands are shorter (Name et al,2010). Previous studies in Drosophila melanogaster (Wolfner,1997; Heifetz et al,2001) have demonstrated that proteins present in the accessory glands induce both egg‐laying and oogenic progression in females.…”

Section: Discussionmentioning

confidence: 77%

“…In this article, we present some differences found in the ultrastructure of spermatozoa of this group. In the family Calliphoridae, only Calliphora vomitoria (Dallai and Afzelius,1990) and Chrysomya megacephala (Name et al,2010) have previously been described.…”

Section: Introductionmentioning

confidence: 99%

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Structure and ultrastructure of spermatozoa and spermiogenesis in three species of Lucilia Robineau‐desvoidy, 1830 (Diptera: Calliphoridae)

Name¹,

Barros-Cordeiro²,

Filho³

et al. 2011

Journal of Morphology

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Morphology of male internal reproductive organs, spermatozoa, and spermiogenesis of the blow-flies Lucilia cuprina, Lucilia eximia, and Lucilia peruviana is first described here, using light and transmission electron microscopy. Spermiogenesis follows the characteristics described for others insect species. The spermatozoa of L. cuprina are similar to those described for other Brachycera. However, in L. eximia and L. peruviana, some differences were found. In L. cuprina and L. eximia species, the spermatozoa are long and thin, measuring about 211 μm and 146 μm in length, of which the head region measures approximately 19 μm and 17 μm, respectively. A polymorphism was observed in L. cuprina and L. eximia spermatozoa. In all three species, the head includes a monolayered acrosome with electron-lucent material. The shape of the nucleus, in cross sections, varies from circular to oval with completely condensed chromatin. Implantation of the axoneme was observed in the middle region of the nucleus, known as the "peg" region. In the next region, the beginning of two mitochondrial derivatives of similar diameter and different lengths in L. cuprina and only one in L. eximia and L. peruviana was observed. In the overlap region, the following structures were observed: nucleus, centriolar adjunct, mitochondrial derivatives, and axoneme. The axoneme is of a conventional insectan type with a 9 + 9 + 2 microtubular arrangement. The male internal reproductive tract consists of testis, deferent ducts, a strongly developed seminal vesicle, accessory glands, and ejaculatory duct. These features are consistent with the structural diversity of the dipteran reproductive tract and spermatozoa, comprising an essential tool for understanding the complex variations found in the Diptera.

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Section: Discussionmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 77%

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Structure and ultrastructure of spermatozoa and spermiogenesis in three species of Lucilia Robineau‐desvoidy, 1830 (Diptera: Calliphoridae)

Name¹,

Barros-Cordeiro²,

Filho³

et al. 2011

Journal of Morphology

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“…The tail region of C. megacephala spermatozoa as determined in 7-day-old males appeared likely consisting of two mitochondrial derivatives, an axoneme and an accessory body, of which 9 + 9 + 2 (9 outer single accessory tubule, 9 doublets and 2 central single) microtubule pattern of axoneme, and this has been recently clarified by Name et al [15]. This pattern was also found in other blow fly, Calliphora vomitoria [16], flesh fly Sarcophaga bullata (Diptera: Sarcophagidae) [17]; fruit fly Drosophila melanogaster (Diptera: Drosophilinae) [18], Orfelia species, and Boletina species (Diptera: Mycetophilidae) [16] whereas in mosquito Culex pipiens and Anopheles maculipennis (Diptera: Culicidae) [16] and sand fly, Phlebotomus papatasi (Diptera: Psychodidae) [19] a type designated as 9 + 9 + 1.…”

Section: Discussionmentioning

confidence: 95%

Reproductive Organ of Blow Fly,Chrysomya megacephala(Diptera: Calliphoridae): Ultrastructural of Testis

Chaiwong

Chaisri

Kurahashi

et al. 2011

Journal of Parasitology Research

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This work presents the ultrastructure of testis of the medically important blow fly, Chrysomya megacephala (Fabricius) (Diptera: Calliphoridae) using light microscopy and electron microscopy. Reproductive organ of males was dissected to determine the testis in the pupal stage, 3-day-old flies and 7-day-old flies and observed under scanning electron microscopy (SEM) and transmission electron microscopy (TEM). SEM displayed a smooth surface which is occasionally penetrated by tracheoles. TEM of the testis in the pupal stage presents the thick testis wall covering underdeveloped cells containing a variable size of an electron-dense globule. For the 3-day-old males, the testicular wall is formed by an external layer, a peritoneal sheath, a muscular layer, a basement membrane, and a follicular epithelium. Follicular epithelium presented developing spermatozoa. Regarding the 7-day-old males, development of spermatozoa is apparent, displaying nucleus, centriolar adjunct, axoneme, and mitochondrial derivatives, with the 9 + 9 + 2 microtubule pattern of axoneme.

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“…The size and morphology of spermatozoa vary among related species (Immler et al, 2007) and comparative studies on the spermatozoa of different groups may improve our understanding of interspecific morphological differences, thus providing additional characters for taxonomic analysis and understanding of insect relationships (Alves et al, 2006;Dallai et al, 2008;Araújo et al, 2009Araújo et al, , 2010Araújo et al, , 2011Name et al, 2010;Simmons, 2011;Vitale et al, 2011), and morphological adaptations (Sivinski, 1984;Jamieson et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Ultrastructure of the spermatozoa of Psammotettix striatus (Linnaeus) and Exitianus nanus (Distant) (Hemiptera: Auchenorrhyncha: Cicadellidae: Deltocephalinae)

Dietrich

Zhang

et al. 2014

Arthropod Structure & Development

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Structure and ultrastructure of spermatozoa of Chrysomya megacephala (Diptera: Calliphoridae)

Cited by 17 publications

References 32 publications

Structure and ultrastructure of spermatozoa and spermiogenesis in three species of Lucilia Robineau‐desvoidy, 1830 (Diptera: Calliphoridae)

Structure and ultrastructure of spermatozoa and spermiogenesis in three species of Lucilia Robineau‐desvoidy, 1830 (Diptera: Calliphoridae)

Reproductive Organ of Blow Fly,Chrysomya megacephala(Diptera: Calliphoridae): Ultrastructural of Testis

Ultrastructure of the spermatozoa of Psammotettix striatus (Linnaeus) and Exitianus nanus (Distant) (Hemiptera: Auchenorrhyncha: Cicadellidae: Deltocephalinae)

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