Abstract
The life cycle of Neocladocystis intestinalis (Vaz, 1932) was resolved experimentally. The prosobranchiate snail Aylacostoma chloroticum Hylton Scott (Thiaridae) collected in the Yacyretá Dam, Province of Misiones, Argentina, was found naturally infected with cercariae that possessed pigmented eye spots, 7 pairs of penetration glands, 12 pairs of flame cells, and a V-shaped, or Y-shaped excretory vesicle with very short stem. The cercariae developed in oval cysts, which were found on fin rays, and under scales of naturally and experimentally exposed tetragonopterid fish species and of experimentally exposed poecilid and prochilodont fish species. Adults were obtained experimentally from juvenile Salminus brasiliensis (Characidae), bred in captivity, and infected with metacercariae from albino Gymnocorymbus ternetzi (Tetragonopteridae), which had been exposed to emerging cercariae.
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Acknowledgments
We are indebted to Lic. D. C. Pérez and Lic. L. Cardinale (Entidad Binacional Yacyretá) for their kind help in snail collection by diving and in obtaining the juvenile S. brasiliensis from the Estación de Piscicultura de San Cosme y Damián (EBY Paraguay), to the ichthyologists of the Universidad Nacional de Misiones, Lic. D. R. Aichino, Lic. M. F. Benitez, and A. S. Masin for their effort to capture fishes in the dam using different fishing gear, to Lic. A. C. Mercado Laczkó for helping in the preparation of figures, and to Dr. S. Amato (Brazil) for providing important literature. Funds and facilities for this work were provided by EBY (Yacyretá Binational Entity); the authors are sincerely grateful for their continued support to the Aylacostoma Program in Yacyretá.
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Quintana, M.G., Ostrowski de Núñez, M. The life cycle of Neocladocystis intestinalis (Vaz, 1932) (Digenea: Cryptogonimidae), in Aylacostoma chloroticum (Prosobranchia: Thiaridae), and Salminus brasiliensis (Characiformes: Characidae), in Argentina. Parasitol Res 115, 2589–2595 (2016). https://doi.org/10.1007/s00436-016-5004-7
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DOI: https://doi.org/10.1007/s00436-016-5004-7