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Three species of Dendromonocotyle Hargis, 1955 (Monogenea: Monocotylidae) collected from Japanese rays

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Abstract

Eighteen species of Dendromonocotyle Hargis, 1955 (Monogenea: Monocotylidae) have so far been described from elasmobranchs worldwide. In this paper, two new species are described; Dendromonocotyle tsutsumii n. sp. from the skin of the Japanese eagle ray, Myliobatis tobijei Bleeker from Tokyo Bay and the pitted stingray, Dasyatis matsubarai Miyosi, from Ooarai, Ibaraki Prefecture, Japan, and Dendromonocotyle fukushimaensis n. sp. from the skin of the cow stingray, Dasyatis ushiei (Jordan & Hubbs) reared at an aquarium in Fukushima Prefecture, Japan. Dendromonocotyle tsutsumii is distinguished from the congeners by the presence of a sclerotised duct connecting the vagina with the seminal receptacle, and De. fukushimaensis by the large body size and the presence of a donut-shaped structure encircling the male copulatory organ near its distal end. Additionally, the reproductive system of Dendromonocotyle akajeii Ho & Perkins, 1980 is redescribed, based on specimens from the skin of the whip stingray, Hemitrygon akajei (Müller & Henle) (syn. Dasyatis akajei) caught in Hamana Lake, Shizuoka Prefecture, Japan. A key to the 20 species of Dendromonocotyle including the present new species is provided.

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Acknowledgements

We thank the late Mr T. Tsutsumi for collecting specimens of Dendromonocotyle tsutsumii n. sp., Mr M. Iwata, Environmental Aquarium Aquamarine Fukushima, Iwaki-shi, Fukushima Prefecture, Japan for sending us specimens of De. fukushimaensis n. sp. and Mr N. Mizuno for collecting Hemitrygon akajei, the host of De. akajeii. We also express gratitude to the late Dr I. D. Whittington and Dr L. A. Chisholm, South Australian Museum, for the loan of four paratypes of Dendromonocotyle pipinna Chisholm & Whittington, 2004 and Dr P. Pilitt, US National Parasite Collection, Beltsville, USA for the loan of a paratype of H. akajei Ho & Perkins, 1980 and Dr. Anna Phillips, National Museum of Natural History, Smithsonian Institution, USA for sending images of the type specimens of Dendromonocotyle centrourae Cheung & Whitaker, 1993 into video files. We also thank Dr David Vaughan, James Cook University, Townsville, Australia for his useful comments on the vaginal structure of De. citrosa.

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  1. Meguro Parasitological Museum, 4-1-1, Shimomeguro, Meguro-ku, Tokyo, 153-0064, Japan

    Akiko Kitamura & Kazuo Ogawa

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  1. Akiko Kitamura
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  2. Kazuo Ogawa
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Correspondence to Kazuo Ogawa.

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This article was registered in the Official Register of Zoological Nomenclature (ZooBank) as ACD9C3D2-B75F-4FA6-96B2-22D35F2985A1. This article was published as an Online First article on the online publication date shown on this page. The article should be cited by using the doi number. This is the Version of Record.

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Kitamura, A., Ogawa, K. Three species of Dendromonocotyle Hargis, 1955 (Monogenea: Monocotylidae) collected from Japanese rays. Syst Parasitol 96, 233–243 (2019). https://doi.org/10.1007/s11230-018-09837-5

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