Abstract
Large-tailed echinostomatid cercariae of the genus Petasiger Dietz, 1909 (Digenea: Echinostomatidae) from the planorbid snails Gyraulus albus (Müller) and Planorbis planorbis (L.) collected in Germany and the Czech Republic and metacercariae from Gasterosteus aculeatus L. (Gasterosteiformes: Gasterosteidae) collected in Canada are characterised morphologically and molecularly. The rediae, cercariae and metacercariae are described in detail and compared with the existing data on the larval stages of Petasiger spp. Comparative molecular analyses using 28S rDNA and nad1 mitochondrial sequences supported the distinct status of four species of Petasiger. Molecular and morphological evidence for their distinction and an updated key to the known large-tailed cercariae of Petasiger from the Palaearctic are provided.
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Acknowledgements
We thank two anonymous reviewers for their valuable comments and suggestions that improved our manuscript. We are grateful to Jana Köchling, Verena Altmann and Jessica Schwelm (University of Duisburg-Essen) and the students of the Parasitology Course 2012 (International Max Planck Research School for Evolutionary Biology, Plön, Germany) for their assistance during sampling and in the laboratory, and to Blanka Škoríková (Institute of Parasitology, Biology Centre of the Academy of Sciences of the Czech Republic) for her kind help with the figures. Furthermore, we thank Dan I. Bolnick (University of Texas at Austin, Section of Integrated Biology, Austin, TX, USA) for providing sticklebacks from Vancouver Island. This study was supported by the Czech Science Foundation (grant P505/12/G112); the ‘Sichere Ruhr’ project as part of the Bundesministerium für Bildung und Forschung (BMBF) program ‘Sustainable Water Management’ (grant 02WRS1283). CS benefited from a Deutsche Bundesstiftung Umwelt (DBU) PhD scholarship.
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Christian Selbach and Miroslava Soldánová contributed equally to this work.
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Selbach, C., Soldánová, M., Georgieva, S. et al. Morphological and molecular data for larval stages of four species of Petasiger Dietz, 1909 (Digenea: Echinostomatidae) with an updated key to the known cercariae from the Palaearctic. Syst Parasitol 89, 153–166 (2014). https://doi.org/10.1007/s11230-014-9513-4
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DOI: https://doi.org/10.1007/s11230-014-9513-4