Marine Biodiversity

, Volume 49, Issue 1, pp 451–462 | Cite as

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

  • S. G. Sokolov
  • Daria I. LebedevaEmail author
  • Ilya I. Gordeev
  • F. K. Khasanov
Original Paper


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.


Muraenolepis marmorata Trematoda Zdzitowieckitrema incognitum Biospeedotrema New genus 28S rDNA sequences Antarctic 



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.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no competing interests.


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Copyright information

© Senckenberg Gesellschaft für Naturforschung and Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  • S. G. Sokolov
    • 1
  • Daria I. Lebedeva
    • 2
    Email author
  • Ilya I. Gordeev
    • 3
    • 4
  • F. K. Khasanov
    • 1
  1. 1.A.N. Severtsov Institute of Ecology and Evolution RASMoscowRussia
  2. 2.Institute of Biology of Karelian Research Centre of RASPetrozavodskRussia
  3. 3.Russian Federal Research Institute of Fisheries and OceanographyMoscowRussia
  4. 4.Lomonosov Moscow State UniversityMoscowRussia

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