Data/hora: 16/06/2024 06:26:34

Provedor de dados: | 82
País: | Brazil
Título: | Characteristics of the Male Reproductive System and Spermatozoa of Leptophlebiidae (Ephemeroptera)
Autores: | Brito,P; Salles,FF; Dolder,H.
Data: | 2011-02-01
Ano: | 2011
Palavras-chave: | Morphology; Sperm; Aflagellate; Sexual maturation.
Resumo: | This study describes morphological changes in the male reproductive system of Miroculis amazonicus (Savage &amp;amp; Peters) from mature nymphs to subimago stages. The sperm ultrastructure of Massartela brieni (Lestage), Farrodes carioca (Domínguez et al) and Miroculis mourei (Savage &amp;amp; Peters), as well as aspects of cell fragments observed in these species' subimagos deferent ducts were described. Sperm from the three species studied are aflagellated and immotile, while those from F. carioca and Ma. brieni are approximately spherical with a homogenous nucleus and acrosome. Sperm of F. carioca present two or three mitochondria located between the nucleus and the acrosome. In Ma. brieni, only one lateral mitochondria was found. Sperm from Mi. mourei are shaped as a number 'eight', with electron lucent spots inside the nucleus and two mitochondria above the acrosome. Large cell fragments containing degenerative vesicles and some sperm were observed in the deferent duct lumen of the three species. Testes of Mi. amazonicus are extremely reduced in the subimago stage, which suggests that these cell fragments originated from testes degeneration.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000100015
Editor: | Sociedade Entomológica do Brasil
Relação: | 10.1590/S1519-566X2011000100015
Formato: | text/html
Fonte: | Neotropical Entomology  v.40 n.1 2011
Fonte: | info:eu-repo/semantics/openAccess