Artículo
Ultrastructural observations of the testicular epithelium and spermatozoa of Pseudochordodes bedriagae (Gordiida, Nematomorpha)
de Villalobos, Leonor Cristina; Restelli, Mario Alfredo; Schmidt Rhaesa, Andreas; Zanca, Fernanda Mariel
Fecha de publicación:
06/2005
Editorial:
Springer
Revista:
Cell and Tissue Research
ISSN:
0302-766X
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Two questions are of interest concerning the male reproductive system in Gordiida: (1) is the epithelium surrounding the testis continuous or discontinuous and (2) is the type of spermatozoon as described at the transmission electron-microscopical level for the two species of Gordius typical for all Gordiida? An examination of the South American species Pseudochordodes bedriagae has allowed us to add new information to this poorly studied phylum. The testicular tubes are large, filled with spermatozoa, and they are surrounded by a continuous epithelium. The epithelial cells that line the posterior testes occasionally overlap, and their cytoplasm is narrow and contains dense granules, abundant endoplasmic reticulum and vesicles. The plasma membrane possesses microvilli with many filaments. The epithelium rests on a basement membrane. The spermatozoa in P. bedriagae resemble the known spermatozoa of two Gordius species but differ in presenting a uniform halo layer of less dense chromatin that surrounds the nuclear dense chromatin. The finding that a similar type of spermatozoa occurs in both genera (Pseudochordodes and Gordius) makes it likely that it is present in all other Gordiida and is therefore an autapomorphy of Gordiida.
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Identificadores
Colecciones
Articulos(CCT - LA PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Citación
de Villalobos, Leonor Cristina; Restelli, Mario Alfredo; Schmidt Rhaesa, Andreas; Zanca, Fernanda Mariel; Ultrastructural observations of the testicular epithelium and spermatozoa of Pseudochordodes bedriagae (Gordiida, Nematomorpha); Springer; Cell and Tissue Research; 321; 2; 6-2005; 251-255
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