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Zdzitowieckitrema incognitum gen. et sp. nov. (Trematoda, Xiphidiata) from the Antarctic fish Muraenolepis marmorata Günther, 1880 (Gadiformes: Muraenolepidae): ordinary morphology but unclear family affiliation

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Abstract

Zdzitowieckitrema incognitum n. gen., n. sp. infects the intestine of the gadiform fish Muraenolepis marmorata in Antarctic seas. Morphologically, this parasite corresponds to the diagnosis of the subfamily Plagioporinae sensu Cribb, 2005 (Opecoelidae, Opecoeloidea). Phylogenetic analysis based on 28S rDNA partial sequences revealed that Z. incognitum n. gen., n. sp. shares a recent common ancestor with representatives of the genus Biospeedotrema Bray, Waeschenbach, Dyal, Littlewood & Morand, 2014 (previously assigned to Stenakrinae, Opecoelidae, Opecoeloidea), and that these trematodes collectively form a sister group to the Gorgoderoidea clade of flukes. The most significant differences between Z. incognitum n. gen., n. sp. and Biospeedotrema spp. are the extension of vitelline fields and intestinal branches, position of the testes and the genital pore, morphology of the internal seminal vesicle, and the ovarian complex.

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Acknowledgements

The authors are grateful to the crew of f/v Yantar-35 and f/v Yantar-31 (Orion Ltd., Khabarovsk), and f/v Insung No. 7 (Insung Corp., Seoul) for their help in collecting the specimens. This study was supported by the Russian Science Foundation, project no. 17-74-10203.

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  1. A.N. Severtsov Institute of Ecology and Evolution RAS, 33, Leninskij prosp., Moscow, 119071, Russia

    S. G. Sokolov & F. K. Khasanov

  2. Institute of Biology of Karelian Research Centre of RAS, 11, Pushkinskaya str., Petrozavodsk, 185910, Russia

    Daria I. Lebedeva

  3. Russian Federal Research Institute of Fisheries and Oceanography, 17, V. Krasnoselskaya str., Moscow, 107140, Russia

    Ilya I. Gordeev

  4. Lomonosov Moscow State University, 1, Leninskie Gory, Moscow, 119234, Russia

    Ilya I. Gordeev

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Sokolov, S.G., Lebedeva, D.I., Gordeev, I.I. et al. Zdzitowieckitrema incognitum gen. et sp. nov. (Trematoda, Xiphidiata) from the Antarctic fish Muraenolepis marmorata Günther, 1880 (Gadiformes: Muraenolepidae): ordinary morphology but unclear family affiliation. Mar Biodiv 49, 451–462 (2019). https://doi.org/10.1007/s12526-017-0830-0

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