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Volume 52, Issue 2


Gyrodactylus derjavinoides sp. nov. (Monogenea, Platyhelminthes) on Salmo trutta trutta L. and G. derjavini Mikailov, 1975 on S. t. caspius Kessler, two different species of Gyrodactylus — combined morphological and molecular investigations

Göran Malmberg / Catherine Collins / Carey Cunningham / Behiar Jalali
Published Online: 2007-06-01 | DOI: https://doi.org/10.2478/s11686-007-0016-1


The paper deals with two morphologically similar but molecularly clearly different species of Gyrodactylus: G. derjavinoides sp. nov. on Salmo trutta trutta L. in Western Europe and G. derjavini Mikailov. 1975 collected on Salmo trutta caspius Kessler in Iran. The new species is described and its opisthaptoral hard parts compared to those of G. derjavini. Our molecular analysis of G. derjavinoides and G. derjavini confirmed that the morphological differences between them are species differences and not intraspecific variations. Phylogenetic analysis using the ITS rDNA region placed both species within the subgenus G. (Limnonephrotus) and within the G. wageneri-group, quite in accordance with morphological results. The two species, however, did not cluster as sister taxa. The correspondence between molecular-based clades within G. (Limnonephrotus) and the morphological shapes of marginal hooks within these clades are discussed. The importance of combined molecular and morphological analyses when describing or redescribing Gyrodactylus species is stressed.

Keywords: Platyhelminthes; Monogenea; Gyrodactylidae; Gyrodactylus sp. nov.; fish; Salmo trutta; Western Europe; Iran

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About the article

Published Online: 2007-06-01

Published in Print: 2007-06-01

Citation Information: Acta Parasitologica, Volume 52, Issue 2, Pages 89–103, ISSN (Online) 1896-1851, ISSN (Print) 1230-2821, DOI: https://doi.org/10.2478/s11686-007-0016-1.

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© 2007 W. Stefański Institute of Parasitology, PAS. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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