| Author | Farias, Maria de Fatima Diniz Baptista | |
| Author | Khon, Anna | |
| Author | Barth, Ortrud Monika | |
| Access date | 2020-09-30T14:35:54Z | |
| Available date | 2020-09-30T14:35:54Z | |
| Document date | 1995 | |
| Citation | FARIAS, Maria de Fatima Diniz Baptista; KOHN, Anna; BARTH, Ortrud Monika. Ultrastructural aspects of spermatogonesis in Metamicrocotyla macracantha (Alexander, 1954) Koratha, 1955 (Monogenea; Microcotylidae). Memórias do Instituto Oswaldo Cruz, Rio de Janeiro, v. 90, n. 5, p. 597-604, Sept./Oct. 1995. | pt_BR |
| ISSN | 0074-0276 | pt_BR |
| URI | https://www.arca.fiocruz.br/handle/icict/43742 | |
| Language | eng | pt_BR |
| Publisher | Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. | pt_BR |
| Rights | open access | |
| Subject in Portuguese | Metamicrocotyla macracantha | pt_BR |
| Subject in Portuguese | Ultraestrutura | pt_BR |
| Subject in Portuguese | Espermatogênese | pt_BR |
| Subject in Portuguese | Espermagênese | pt_BR |
| Subject in Portuguese | Espermatozóides | pt_BR |
| Subject in Portuguese | Monogenea | pt_BR |
| Title | Ultrastructural aspects of spermatogonesis in Metamicrocotyla macracantha (Alexander, 1954) Koratha, 1955 (Monogenea; Microcotylidae) | pt_BR |
| Type | Article | |
| DOI | 10.1590/S0074-02761995000500010 | |
| Abstract | Ultrastructural aspects of spermatogenesis, spermiogenesis and of the mature spermatozoon of a microcotylid monogenean Metamicrocotyla macracantha parasite from Mugil liza, are described. The irregularly-shaped spermatogonia divides by successive mitoses, forming the primary spermatocytes, identified by the presence of synaptonemal complexes in their nuclei. The spermatids formed by meiotic cell divisions of the secondary spermatocytes, differentiate into a mature spermatozoon. Cross sections of the head and the middle region of mature spermatozoa show the nucleus with strong condensed chromatin, the mitochondria with short cristae, peripheral microtubules and two axonemes with a 9+1 pattern, confirming the characteristics of this genus. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Helmintologia. Laboratório de Helmintos Parasitos de Peixes. Rio de Janeiro, RJ, Brasil. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Helmintologia. Laboratório de Helmintos Parasitos de Peixes. Rio de Janeiro, RJ, Brasil. | pt_BR |
| Affilliation | Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Virologia. Laboratório de Ultraestrutura Viral. Rio de Janeiro, RJ, Brasil. | pt_BR |
| Subject | Ultrastructure | pt_BR |
| Subject | Monogenea | pt_BR |
| Subject | Spermatogenesis | pt_BR |
| Subject | Spermiogenesis | pt_BR |
| Subject | Spermatozoa | pt_BR |
| Subject | Metamicrocotyla macracantha | pt_BR |
| e-ISSN | 1678-8060 | |
