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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/20995

Title: Ultrastructural aspects of spermatogenesis in Metamicrocotyla macracantha (Alexander,1954) Koratha,1955 (Monogenea; Microcotylidae)
Authors: Farias, Maria de Fatima Diniz Baptista
Kohn, Anna
Barth, Ortrud Monika
Keywords: ultrastructure - Metamicrocotyla macracantha - Monogenea - spermatogenesis - spermiogenesis - spermatozoa
Issue Date: 31-Dec-1995
Publisher: Fundação Oswaldo Cruz, Fiocruz
Citation: Memórias do Instituto Oswaldo Cruz (ISSN: 1678-8060) Vol 90 Num 5
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.
URI: http://hdl.handle.net/1807/20995
Other Identifiers: http://www.bioline.org.br/abstract?id=oc95120
Rights: Copyright 1995 Fundacao Oswaldo Cruz
Appears in Collections:Bioline International Legacy Collection

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