Portal de Periódicos da CAPES

Fine structure of Henneguya amaionica (Myxozoai in ovarian follicles of Hoplosternum littorale (Teleostei) from the Amazon river

1994; Inter-Research; Volume: 19; Linguagem: Inglês

10.3354/dao019169

1616-1580

Aurora Torres, Edílson Matos, Carlos Azevedo,

Marine Ecology and Invasive Species

During an ultrastructural study of oogenesis in the Amazonian teleost fish Hoplosternum littorale we observed Henneguya arnazonjca Rocha, Matos & Azevedo.1992 (Myxosporea) inside the follicles and ovarian stroma.The presence of myxosporeans in sexual tissues of teleosts is rather unusual and has previously been described only for this group of fishes.The parasite forms cysts between the zona pellucida and follicle cells of the oocytes.Inside these cysts we found early phases of sporogenesis.In the ovarian stroma we only found mature spores and no cysts were seen.In this paper we present an ultrastructural description of the early sporogenic phases of the parasite.The possible infection cycle and implications for the reproductive potential are briefly discussed.