ICB - Instituto de Ciências Biológicas
URI Permanente desta comunidadehttps://repositorio.ufpa.br/handle/2011/2151
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Navegando ICB - Instituto de Ciências Biológicas por Autor "AL-QURAISHY, Saleh"
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Item Acesso aberto (Open Access) Ultrastructural description of Ceratomyxa microlepis sp. nov. (Phylum Myxozoa): a parasite infecting the gall bladder of Hemiodus microlepis, a freshwater teleost from the Amazon River(2013-04) AZEVEDO, Carlos José Correia de; ROCHA, Sonia Maria Rodrigues da; CASAL, Graça Maria Figueiredo; SÃO CLEMENTE, Sérgio Carmona de; MATOS, Patrícia Santos; AL-QURAISHY, Saleh; MATOS, Edilson RodriguesA new ceratomyxid parasite was examined for taxonomic identification, upon being found infecting the gall bladder of Hemiodus microlepis (Teleostei: Hemiodontidae), a freshwater teleost collected from the Amazon River, Brazil. Light and transmission electron microscopy revealed elongated crescent-shaped spores constituted by two asymmetrical shell valves united along a straight sutural line, each possessing a lateral projection. The spores body measured 5.2 ± 0.4 µm (n = 25) in length and 35.5 ± 0.9 µm (n = 25) in total thickness. The lateral projections were asymmetric, one measuring 18.1 ± 0.5 µm (n = 25) in thickness and the other measuring 17.5 ± 0.5 µm (n = 25) in thickness. Two equal-sized subspherical polar capsules measuring 2.2 ± 0.3 µm in diameter were located at the same level, each possessing a polar filament with 5-6 coils. The sporoplasm was binucleate. Considering the morphometric data analyzed from the microscopic observations, as well as the host species and its geographical location, this paper describes a new myxosporean species, herein named Ceratomyxa microlepis sp. nov.; therefore representing the first description of a freshwater ceratomyxid from the South American region.