Ultrastructural aspects of spermatogonesis in Metamicrocotyla macracantha (Alexander, 1954) Koratha, 1955 (Monogenea; Microcotylidae)

dc.creatorFarias, Maria de Fatima Diniz Baptista
dc.creatorKhon, Anna
dc.creatorBarth, Ortrud Monika
dc.date2020-09-30T14:35:54Z
dc.date2020-09-30T14:35:54Z
dc.date1995
dc.date.accessioned2023-09-26T20:57:08Z
dc.date.available2023-09-26T20:57:08Z
dc.identifierFARIAS, 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.
dc.identifier0074-0276
dc.identifierhttps://www.arca.fiocruz.br/handle/icict/43742
dc.identifier10.1590/S0074-02761995000500010
dc.identifier1678-8060
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8866719
dc.descriptionUltrastructural 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.
dc.formatapplication/pdf
dc.languageeng
dc.publisherFundação Oswaldo Cruz. Instituto Oswaldo Cruz.
dc.rightsopen access
dc.subjectMetamicrocotyla macracantha
dc.subjectUltraestrutura
dc.subjectEspermatogênese
dc.subjectEspermagênese
dc.subjectEspermatozóides
dc.subjectMonogenea
dc.subjectUltrastructure
dc.subjectMonogenea
dc.subjectSpermatogenesis
dc.subjectSpermiogenesis
dc.subjectSpermatozoa
dc.subjectMetamicrocotyla macracantha
dc.titleUltrastructural aspects of spermatogonesis in Metamicrocotyla macracantha (Alexander, 1954) Koratha, 1955 (Monogenea; Microcotylidae)
dc.typeArticle


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