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Nataliella marcelli n. g., n. sp. (Cestoda: Trypanorhyncha: Rhinoptericolidae) from Hawaiian fishes

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Abstract

A new trypanorhynch cestode from Hawaiian waters is described based on specimens in the collection of the Meguro Parasitological Museum, Tokyo, and newly collected specimens. Nataliella marcelli n. g., n. sp. is characterised by its elongate, craspedote scolex with four small, ear-shaped bothria, an elongate pars vaginalis and long bulbs. The homeoacanthous homeomorphous metabasal armature is comprised of five or six slender, solid hooks per half spiral row. A distinctive basal armature is present, including a combination of six characteristically shaped macrohooks not previously described for trypanorhynchs. The surface ultrastructure consists of gladiate spiniform microtriches that cover the distal and proximal bothrial surface and filiform microtriches on the scolex peduncle. The adults are not known. Nataliella is assigned to the family Rhinoptericolidae Carvajal & Campbell, 1975 based on its possession of four bothria, prebulbar organs and no chainette or intercalary hooks. The family diagnosis is amended to accommodate the new genus. Rhinoptericola megacantha Carvajal & Campbell, 1975 is considered the most closely related species, a position that has been confirmed by molecular analyses of the SSU and LSU rDNA. Nataliella n. g. is intermediate in morphology between the homeoacanth family Tentaculariidae Poche, 1926 (superfamily Tentacularioidea) and the Rhinoptericolidae and other eutetrarhynchid genera (superfamily Eutetrarhynchoidea), sharing characters of both superfamilies.

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Notes

  1. Based on the classification of Palm (2004), the Paranybeliniidae were formally transferred to the Tentacularioidea by Palm (2008) and the Sphyriocephalidae from the Tentacularioidea to the Gymnorhynchoidea by Palm et al. (2009).

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Acknowledgements

I am grateful to Dr M. Machida, M. Kamegai and Dr T. Iwaki for permitting access to the collection in the Meguro Parasitological Museum, Tokyo, and to Dr Greta Aeby, Hawaii Institute of Marine Biology, University of Hawai’i—Manoa, USA, for allowing access to new material. Two anonymous reviewers helped to improve the manuscript. The original material was obtained under an extended NSF grant Nos GB-78, GB-2992 and GB-4080 under the sponsorship of the University of Hawaii. This research was supported by the German Research Council (DFG PA 664/4-1, 4-2 and 664/6-1) and the NSF PBI awards Nos 0818696 and 0818823.

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  1. Institute of Zoomorphology, Cell Biology and Parasitology, Heinrich-Heine-University Düsseldorf, Universitätsstraße 1, 40225, Düsseldorf, Germany

    Harry W. Palm

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Correspondence to Harry W. Palm.

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Palm, H.W. Nataliella marcelli n. g., n. sp. (Cestoda: Trypanorhyncha: Rhinoptericolidae) from Hawaiian fishes. Syst Parasitol 75, 105–115 (2010). https://doi.org/10.1007/s11230-009-9205-7

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