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Ultrastructural aspects of spermatogenesis in Phalloceros caudimaculatus (Teleostei, Poeciliidae) / Aspectos ultraestructurales de la espermatogénesis en Phalloceros caudimaculatus (Teleostei, Poeciliidae)
Vicentini, Carlos Alberto; Muñoz, Mario Esteban; Vicentini, Irene Bastos Franceschini.
  • Vicentini, Carlos Alberto; São Paulo State University. Faculty of Sciences. Department of Biological Sciences. Bauru. BR
  • Muñoz, Mario Esteban; São Paulo State University. Faculty of Sciences. Department of Biological Sciences. Bauru. BR
  • Vicentini, Irene Bastos Franceschini; São Paulo State University. Faculty of Sciences. Department of Biological Sciences. Bauru. BR
Int. j. morphol ; 28(3): 951-956, Sept. 2010. ilus
Article in English | LILACS | ID: lil-577211
ABSTRACT
The aim of the present study was to analyze the ultrastructural aspects of spermatogenesis in Phalloceros caudimaculatus, during cell proliferation. The parenchyma is organized morphologically as lobular restricted spermatogonial testis. Spermiogenesis in this species is characterized by four morphological stages of development (spermatids S1 through S4). The mature spermatids and spermatozoa heads are situated at the periphery of the cyst surrounded by the cytoplasm of the Sertoli cells. The germ cell's ultrastructure and spermatogenesis in P. caudimaculatus are very similar to that of other poeciliids.
RESUMEN
El objetivo del presente estudio fue analizar los aspectos ultraestructurales de la espermatogénesis en Phalloceros caudimaculatus, durante el periodo de proliferación celular. El parénquima testicular está morfológicamente organizado como lobular espermatogonial restricto. La espermiogénesis en esta especie se caracteriza por cuatro etapas morfológicas de desarrollo (espermátidas S1 hasta S4). Las cabezas de las espermátidas maduras y espermatozoides están situadas en la periferia de los cistos, rodeados por el citoplasma de las células de Sertoli. La ultraestructura de las células germinativas y la espermatogénesis en P. caudimaculatus son muy similares a las de otros poecílideos.
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Full text: Available Index: LILACS (Americas) Main subject: Spermatids / Spermatogenesis / Poecilia Limits: Animals Language: English Journal: Int. j. morphol Journal subject: Anatomy Year: 2010 Type: Article / Project document Affiliation country: Brazil Institution/Affiliation country: São Paulo State University/BR

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Full text: Available Index: LILACS (Americas) Main subject: Spermatids / Spermatogenesis / Poecilia Limits: Animals Language: English Journal: Int. j. morphol Journal subject: Anatomy Year: 2010 Type: Article / Project document Affiliation country: Brazil Institution/Affiliation country: São Paulo State University/BR