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A new species of Myxosporea, Henneguya quelen, from silver catfish Rhamdia quelen (Siluriforme: Pimelodidae) in the Amazonian region

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Abstract

Henneguya quelen n. sp. (Myxosporea) is described from the kidney of the silver catfish, Rhamdia quelen (Quoy & Gaimard, 1824), from Marajó Island. In all, 40% of the 57 silver catfish collected from the Paracauari River in the municipality of Salvaterra presented cysts in the kidney. The cysts were whitish, spherical, and 0.45 mm in diameter. The histological analyses revealed tubular renal compression and cellular degeneration in the area adjacent to the xenomas. The spores are ellipsoid, with well-marked valves, caudal projection, and two elongated polar capsules of equal size. The mature spores measure approximately 15.6 μm in length, with the caudal appendage split posteriorly; 24.3 μm in length, for a total spore length of 40.0 μm; and a width of 4.1 μm. The polar capsules are pyriform, 5.5 μm long and 1.7 μm wide. A phylogenetic analysis based on Bayesian inference confirmed that the specimens represented a new species, which was denominated Henneguya quelen n. sp.

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Acknowledgements

We also thank SISBIO/ICMBIO-IBAMA (Brazilian Institute of the Environment and Renewable Natural Resources), for authorizing the research through scientific license no. 27119, and the Edilson Matos Research Laboratory (LPEM-UFPA).

Funding

To the research funding agencies CAPES (Coordination of Higher Education Training) through PVE 88881.064967/2014-01, CNPq (Brazilian National Council for Scientific and Technological Development) through CNPq UNIVERSAL/2014, N. 441645/2014-3, and a productivity fellowship to Edilson Rodrigues Matos (CNPq 300949/2012-0), FAPESPA (Pará State Research Foundation) research notice 006/2014, icaaf no. 162/2014.

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Correspondence to Edilson R. Matos.

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The present study was approved by the Ethics Committee for Animal Experimentation of the Federal Rural University of Amazonia, UFRA (CEUA approval no. 013/2014).

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The authors declare that they have no conflicts of interest.

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Handling Editor: Una Ryan

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Abrunhosa, J., Sindeaux-Neto, J.L., Hamoy, I. et al. A new species of Myxosporea, Henneguya quelen, from silver catfish Rhamdia quelen (Siluriforme: Pimelodidae) in the Amazonian region. Parasitol Res 117, 3809–3820 (2018). https://doi.org/10.1007/s00436-018-6086-1

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  • DOI: https://doi.org/10.1007/s00436-018-6086-1

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