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Catatropis hatcheri n. sp. (Digenea: Notocotylidae) from Heleobia hatcheri (Prosobranchia: Hydrobiidae) and notes on its life-cycle in Patagonia, Argentina

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Abstract

A new species of Catatropis Oghner, 1905 from a freshwater Neotropical prosobranch snail, Heleobia hatcheri (Hydrobiidae), is described. Naturally infected snails were collected from Nahuel Huapí Lake in Andean Patagonia. The characteristics of the larval stages are also presented. Experimental adults were recovered from the distal region of the intestinal caeca of chicks and ducklings and natural adults from a wild duck Anas platyrhynchos. Adults of Catatropis hatcheri n. sp. can be distinguished from all other species of the genus in having 10–12 (11) ventral glands in each lateral row, the cirrus-sac extending back to between the first third and the middle of the body, the metraterm shorter than the cirrus-sac, a previtelline field of 1,258–1,544 (1,396), vitelline follicles reach back to the anterior border of the testes with some follicles extending slightly lateral to them, only external testicular margin lobed and genital pore in median line just posterior to the intestinal bifurcation. In addition, the eggs have one filament on each pole, the rediae contain one or two mature cercariae, and the cercariae are tri-oculate, with a long tail and encyst in the environment.

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Acknowledgements

V. Flores has a fellowship funded by CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina). Financial support was also provided by the Universidad Nacional del Comahue B-115 and by CONICET PIP-02752. We are grateful to Park Ranger Sebastián Raviculé from the Seccional Lago Roca, Parque Nacional Nahuel Huapí, for providing the specimen of Anas platyrhynchos. Collections were carried out with the permission of local Parques Nacionales authorities. We are grateful to David Gibson for revision of the English of the manuscript.

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  1. Laboratorio de Parasitología, Centro Regional Universitario Bariloche, Universidad Nacional del Comahue, Quintral 1250, (8400) San Carlos de Bariloche, Río Negro, Argentina

    Verónica Flores & Norma Brugni

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  1. Verónica Flores
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  2. Norma Brugni
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Correspondence to Verónica Flores.

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Flores, V., Brugni, N. Catatropis hatcheri n. sp. (Digenea: Notocotylidae) from Heleobia hatcheri (Prosobranchia: Hydrobiidae) and notes on its life-cycle in Patagonia, Argentina. Syst Parasitol 63, 109–116 (2006). https://doi.org/10.1007/s11230-005-9004-8

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  • DOI: https://doi.org/10.1007/s11230-005-9004-8

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