Resumo
The fine structure of the spermatozoon in the Mellita quinquiesperforata Leske, 1778 was studied. Collected from the Amazon region, were described by light and transmission electron microscopy. The spermatozoon consisted of a acrosome complex, nucleus, four to six mitochondria, two centrioles and flagellum. The acrosome was composed of a acrosome complex, the acrosomal vesicle and the subacrosomal space. The nucleus are composed by dense material. The middle piece contains 4-6 mitochondria which are arranged around the centrioles, the 9p+0, whose axoneme has the classic 9p+2 microtubular construction.
Equinodermata; Mellita quinquiesperforata; ultrastructure; spermatozoon
Equinodermata; Mellita quinquiesperforata; ultrastructure; spermatozoon
Estrutura fina do espermatozóide de Mellita quinquiesperforata Leske (Echinodermata) do litoral norte do Brasil1 1 Trabalho parcialmente subsidiado pela FCAP, UFPA e Fundação Engenheiro Antônio de Almeida (Portugal).
Fine structure of the spermatozoon of the Mellita quinquiesperforata (Echinodermata) of the Northern littoral of Brazil
Edilson Matos* * Correspondências para: Departamento de Biologia Animal, Faculdade de Ciências Agrárias do Pará. Avenida Tancredo Neves, 66077-530 Belém, Pará, Brasil ; Patricia MatosI; Laura CorralII; Carlos AzevedoII
IDepartamento de Histologia e Embriologia, Universidade Federal do Pará. 66059-900 Belém, Pará, Brasil
IIDepartamento de Biologia Celular, ICBAS, Universidade do Porto. 4050 Porto, Portugal
ABSTRACT
The fine structure of the spermatozoon in the Mellita quinquiesperforata Leske, 1778 was studied. Collected from the Amazon region, were described by light and transmission electron microscopy. The spermatozoon consisted of a acrosome complex, nucleus, four to six mitochondria, two centrioles and flagellum. The acrosome was composed of a acrosome complex, the acrosomal vesicle and the subacrosomal space. The nucleus are composed by dense material. The middle piece contains 4-6 mitochondria which are arranged around the centrioles, the 9p+0, whose axoneme has the classic 9p+2 microtubular construction.
Key words: Equinodermata. Mellita quinquiesperforata, ultrastructure, spermatozoon
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AGRADECIMENTOS. Ao Sr. João Carvalheiro pelo serviço iconográfico.
Recebido em 01.VII.1999; aceito em 25.VIII.2000.
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Datas de Publicação
-
Publicação nesta coleção
08 Maio 2009 -
Data do Fascículo
Set 2000
Histórico
-
Recebido
01 Jul 1999 -
Aceito
25 Ago 2000
