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Morphological and molecular evidence for synonymy of Corynosoma obtuscens Lincicome, 1943 with Corynosoma australe Johnston, 1937 (Acanthocephala: Polymorphidae)

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Abstract

Corynosoma obtuscens Lincicome, 1943 (Acanthocephala: Polymorphidae) is synonymised with Corynosoma australe Johnston, 1937 based on combined morphological and molecular evidence. Morphological comparison of C. obtuscens (24 males and 27 females) collected from a California sea lion Zalophus californianus (Lesson) in California, USA, with the type-specimens of C. obtuscens and C. australe, and with published data on C. australe collected from different hosts and regions showed no significant differences. The levels of genetic divergence in the cox1 sequences obtained from C. obtuscens from a California sea lion in the present study and C. australe from otariid seals from Argentina and penguins from Brazil ranged between 1.4–1.6% and was considered to represent intraspecific variability. Additionally, cox1 sequences were generated for Andracantha phalacrocoracis (Yamaguti, 1939), Corynosoma semerme (Forssell, 1904), C. strumosum (Rudolphi, 1802), C. validum Van Cleave, 1953 and C. villosum Van Cleave, 1953. Our results revealed inconsistency in the identification of material used as a source of the previously published sequence data for C. obtuscens and C. magdaleni Montreuil, 1958.

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Acknowledgements

The authors thank Dr Frances Gulland, Christine Fontaine, Barbie Halaska, and other colleagues from the Marine Mammal Center (TMMC), Sausalito, California, for their help in parasitological examination of dead California sea lions. The authors thank Dr Yuriy Kuzmin from the Institute of Zoology NAS of Ukraine for his useful comments and assistance with preparation of the manuscript. The images of helminths were made at the Center of collective use of scientific equipment “Animalia” (I. I. Schmalhausen Institute of Zoology NAS of Ukraine).

Funding

This study was partially supported by the North-West University, South Africa to OK.

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Authors and Affiliations

  1. I. I. Schmalhausen Institute of Zoology NAS of Ukraine, B. Khmelnytsky Street, 15, Kyiv, 01030, Ukraine

    Olga I. Lisitsyna, Olena Kudlai & Tetiana A. Kuzmina

  2. Institute of Ecology, Nature Research Centre, Akademijos, 2, 08412, Vilnius, Lithuania

    Olena Kudlai

  3. Water Research Group, Unit for Environmental Sciences and Management, North-West University, Potchefstroom Campus, Potchefstroom, 2520, South Africa

    Olena Kudlai

  4. Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, 80526, USA

    Terry R. Spraker

  5. Department of Biology, University of North Dakota, 10 Cornell Street, Grand Forks, ND, 58202-9019, USA

    Vasyl V. Tkach

  6. Parasitology Section, South Australian Museum, North Terrace, Adelaide, 5000, Australia

    Lesley R. Smales

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  1. Olga I. Lisitsyna
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Lisitsyna, O.I., Kudlai, O., Spraker, T.R. et al. Morphological and molecular evidence for synonymy of Corynosoma obtuscens Lincicome, 1943 with Corynosoma australe Johnston, 1937 (Acanthocephala: Polymorphidae). Syst Parasitol 96, 95–110 (2019). https://doi.org/10.1007/s11230-018-9830-0

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