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Estrutura fina do espermatozóide de Tagelus plebeius (Lightfoot) (Mollusca, Bivalvia) do litoral norte do Brasil

Fine structure of the spermatozoon of Tagelus plebeius (Lightfoot) (Mollusca, Bivalvia) of the North littoral of Brazil

Resumo

It is described the sperm ultraestructure differentiation during spermiogenesis of Tagelus plebeius (Lightfoot, 1786). The spermatozoon is an uniflagellated cell of the primitive type. The head region contains a rounded or conical nucleus surrounded by acrosome. The middle piece contains four mitochondria which are arranged around the axoneme. The flagellum contains the usual microtubular axoneme.

Mollusca; Bivalvia; Tagelus plebeius; ultrastructure; spermatozoa


Mollusca; Bivalvia; Tagelus plebeius; ultrastructure; spermatozoa

Estrutura fina do espermatozóide de Tagelus plebeius (Lightfoot) (Mollusca, Bivalvia) do litoral norte do Brasil

Fine structure of the spermatozoon of Tagelus plebeius (Lightfoot) (Mollusca, Bivalvia) of the North littoral of Brazil

Edilson MatosI; Patrícia MatosII; Graça CasalIII; Carlos AzevedoIV

IDepartamento de Biologia Animal, Histologia e Embriologia, Faculdade de Ciências Agrárias do Pará. 66077-530 Belém, Pará, Brasil

IIDepartamento de Histologia e Embriologia, Universidade Federal do Pará. 66075-900 Belém, Pará, Brasil

IIILaboratório de Biologia Celular, Instituto Superior de Ciências da Saúde. 4580 Paredes, Portugal

IVDepartamento de Biologia Celular, Instituto de Ciências Biomédicas, Universidade do Porto. 4050 Porto, Portugal

ABSTRACT

It is described the sperm ultraestructure differentiation during spermiogenesis of Tagelus plebeius (Lightfoot, 1786). The spermatozoon is an uniflagellated cell of the primitive type. The head region contains a rounded or conical nucleus surrounded by acrosome. The middle piece contains four mitochondria which are arranged around the axoneme. The flagellum contains the usual microtubular axoneme.

Key words: Mollusca, Bivalvia, Tagelus plebeius, ultrastructure, spermatozoa

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AGRADECIMENTOS. Ao Prof. Dr. Osmar Domaneschi (Instituto de Biociências, Universidade de São Paulo) pela identificação da espécie. Ao Sr João Carvalheiro pelo serviço iconográfico. Trabalho parcialmente subsidiado pela Universidade do Porto/Portugal, FCAP, UFPa, CEPNOR/IBAMA, e Fundação Engenheiro António de Almeida (Portugal).

Recebido em 04.VII.1996; aceito em 04.IX.1997.

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Datas de Publicação

  • Publicação nesta coleção
    10 Jul 2009
  • Data do Fascículo
    Set 1997

Histórico

  • Recebido
    04 Jul 1996
  • Aceito
    04 Set 1997
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