An ultrastructural study of spermiogenesis in three species of Physalaemus (Anura, Leptodactylidae)
Biocell
;
23(3): 211-221, Dec. 1999.
Artículo
en Inglés
| LILACS
| ID: lil-340364
ABSTRACT
Ultrastructural aspects of spermiogenesis and testicular spermatozoa of three anuran amphibians, Physalaemus biligonigerus, P. fuscomaculatus and P. gracilis, were investigated by electron microscopy. The nuclei, middle pieces and tails of the three species were similar. In all cases, the nuclei were elongated and the acrosome consisted of a cone-shaped cap. The connecting pieces located in the flagellum implantation zone had transverse striations. The tails had a 9 + 2 axial filament pattern, a juxtaxonemal fiber and an undulating membrane. In contrast to other Leptodactylidae spermatozoa, no axial rod were observed in these Physalaemus species
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Índice:
LILACS (Américas)
Asunto principal:
Anuros
/
Especificidad de la Especie
/
Espermatogénesis
/
Espermatozoides
/
Microscopía Electrónica
Límite:
Animales
Idioma:
Inglés
Revista:
Biocell
Asunto de la revista:
Clulas
Año:
1999
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
Universidade Estadual de Campinas/BR
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