Morphology and molecular characterization of Ceratomyxa sp. (Cnidaria, Myxosporea, Ceratomyxidae), infecting the gallbladder of Curimata cyprinoides (Characiformes: Curimatidae) in the lower Araguaia River, Brazil
Abstract This study reports the occurrence of a myxosporid parasite of the genus Ceratomyxa Thélohan, 1892 found in the gallbladder of Curimata cyprinoides Linnaeus, 1766. This species is abundant in the Tocantins-Araguaia hydrographic basin and holds environmental, social and economic importance. T...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Colégio Brasileiro de Parasitologia Veterinaria
2025-05-01
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| Series: | Revista Brasileira de Parasitologia Veterinária |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-29612025000200805&lng=en&tlng=en |
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| Summary: | Abstract This study reports the occurrence of a myxosporid parasite of the genus Ceratomyxa Thélohan, 1892 found in the gallbladder of Curimata cyprinoides Linnaeus, 1766. This species is abundant in the Tocantins-Araguaia hydrographic basin and holds environmental, social and economic importance. The genus Ceratomyxa is characterized by two equally-sized polar capsules with lateral projections, whick may appear slightly slightly arched in a half-moon shape or fully curved arched. Light microscopy and molecular analysis were employed in this study. The mature spores were composed of two equally-sized symmetrical valves with equal capsular foramina and two equally-sized lateral projections. These spores (n=40) were freely suspended in the gallbladder, with a total length of 11.2 ± 0.1 μm and width of 4.0 ± 0.3 μm. The polar capsules measured 2.1 ± 0.1 μm in both length and width; and the two symmetrical lateral elongations formed a posterior angle of 41.4º ± 0.7º. An integrated comparative analysis of the morphological characteristics and partial SSU rDNA sequences confirmed this finding as a parasite of the genus Ceratomyxa sp., located in the gallbladder of C. cyprinoides in the Tocantins-Araguaia basin, within the municipality of Araguatins, in eastern Amazon, Brazil. |
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| ISSN: | 1984-2961 |