Estudo ultra-estrutural do esôfago de Trichogenes longipinnis (Britski & Ortega) (Pisces, Siluriformes, Trichomicteridae)

Ultrastructural study of the oesophagous of Trichogenes longipinnis (Britski & Ortega) (Pisces, Siluriformes, Trichomicteridae)

Nadja Lima Pinheiro Rosa Maria M. Mendes Luiz Ludovico George Armando Sales Sobre os autores

Resumo

Trichogenes longipinnis (Britski & Ortega, 1983) is a leather fish restricted to the rivers on the shore in the southeast of Brazil. In this work, the oesophagous structure is being showed. The oesophagous appears itself short, dorsally inclinated toward pericardium and ventrally covered by liver lobe. By electron microscopy we can observe a mucosa layer formed by stratified squamous epithelium and lamina propria with stratum compactum. The epithelium is composed by three types of cells: superficial squamous cells; mucous cells, similar to the globet cells and polyhedric cells. The stratification of this epithelium provides a complete basal layer of proliferation polyhedric cells. The cells in the intermediate region of the epithelium are also polyhedric. These cells are just bellow the superficial squamous cells and packed among mucous cells.

Pisces; Trichomicteridae; Trichogenes longipinnis; oesophagous; ultrastructure


Pisces; Trichomicteridae; Trichogenes longipinnis; oesophagous; ultrastructure

Estudo ultra-estrutural do esôfago de Trichogenes longipinnis (Britski & Ortega) (Pisces, Siluriformes, Trichomicteridae)

Ultrastructural study of the oesophagous of Trichogenes longipinnis (Britski & Ortega) (Pisces, Siluriformes, Trichomicteridae)

Nadja Lima PinheiroI; Rosa Maria M. MendesII; Luiz Ludovico GeorgeIII; Armando SalesI

IDepartamento de Biologia Animal, Universidade Federal Rural do Rio de Janeiro, Antiga Rodovia Rio São Paulo km 47, 23851-970 Itaguaí, Rio de Janeiro, Brasil

IIUniversidade Gama Filho, Rua Manoel Vitorino 625, 20748-900 Rio de Janeiro, Rio de Janeiro, Brasil

IIIDepartamento de Histologia e Embriologia, Universidade de São Paulo, São Paulo, Brasil

ABSTRACT

Trichogenes longipinnis (Britski & Ortega, 1983) is a leather fish restricted to the rivers on the shore in the southeast of Brazil. In this work, the oesophagous structure is being showed. The oesophagous appears itself short, dorsally inclinated toward pericardium and ventrally covered by liver lobe. By electron microscopy we can observe a mucosa layer formed by stratified squamous epithelium and lamina propria with stratum compactum. The epithelium is composed by three types of cells: superficial squamous cells; mucous cells, similar to the globet cells and polyhedric cells. The stratification of this epithelium provides a complete basal layer of proliferation polyhedric cells. The cells in the intermediate region of the epithelium are also polyhedric. These cells are just bellow the superficial squamous cells and packed among mucous cells.

Key words: Pisces,Trichomicteridae, Trichogenes longipinnis, oesophagous, ultrastructure

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Recebido em 25.XI.1993; aceito em 25.II.1994.

  • VEGAZ-VELEZ, M. 1972. La struture histologique typique du tube digestif des poissons teleosteens. Tethys 41:163-174.
  • MEROTHA, B.K. & S.S. KHANNA. 1969. Histomorphology of the oesophagus and stomach in some Indian teleosts with inference on their adaptional features. Zool. Beitr. 15:375-391.
  • BRITSKI, H.A. & H. ORTEGA. 1983. Trichogenes longipinnis, novo gênero e espécie de Trychomycterinae do sudeste do Brasil (Pisces, Siluriformes). Revta bras. Zool. 1 (3):211-216.
  • GREMSKI, W. 1978. Contribuição ao estudo ultra-estrutural do epitélio do trato digestivo de Pimelodus maculatus Lacèpède, 1803 (Pisces). Tese de Doutorado, não publicada, Instituto de Ciências Biomédicas, Universidade de São Paulo, 178p.

Datas de Publicação

  • Publicação nesta coleção
    03 Ago 2009
  • Data do Fascículo
    1993

Histórico

  • Aceito
    25 Fev 1994
  • Recebido
    25 Nov 1993
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