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A new genus and species of hatschekiid copepod (Siphonostomatoida) from groupers (Actinopterygii: Serranidae) collected off the Ryukyu Archipelago, Japan

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Abstract

A new genus and species of copepod, Mihbaicola sakamakii n. g., n. sp., belonging to the siphonostomatoid family Hatschekiidae, is described based on the females collected from inside the tissue of the branchiostegal membrane in three species of the groupers, Epinephelus fasciatus (Forsskål) (type-host), E. merra Bloch and Cephalopholis leopardus (Lacépède), collected off Okinawa-jima Island and Iriomote-jima Island, Ryukyu Archipelago, North Pacific Ocean. The new genus can be distinguished from other hatschekiid genera by a combination of the following characters in the female: the head is composed of the cephalosome and the pedigerous somite; the cephalothorax is expanded into a pair of posteroventral lobes carrying leg 1; legs 1 and 2 are biramous and composed of the protopod and both rami are 2-segmented; leg 3 is absent; and leg 4 is represented by a rounded lobe with a chitinous pointed apical process.

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Acknowledgements

The author is grateful to Dr Takashi Sakamaki, University of the Ryukyus, Okinawa for the invitation to join his research project on the relationship between marine life and environmental factors in the Ryukyu Archipelago. Dr Tohru Naruse, University of the Ryukyus, is thanked for arranging the field survey at Iriomote-jima Island. Keiichi Ishigaki, Shinya Imura and Yuki Miyaoka, University of the Ryukyus, Okinawa, are gratefully acknowledged for providing the specimens. The present study was supported by the Iriomote Station, Tropical Biosphere Research Center, University of the Ryukyus. Part of this work received financial support from a field research project funded by the NEXT program of the Japan Society for the Promotion of Science (JSPS) (GR083, PI Takashi Sakamaki) and Grants-in-Aid for JSPS Fellows (No. 23-4311).

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  1. Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan

    Daisuke Uyeno

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  1. Daisuke Uyeno
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Correspondence to Daisuke Uyeno.

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Uyeno, D. A new genus and species of hatschekiid copepod (Siphonostomatoida) from groupers (Actinopterygii: Serranidae) collected off the Ryukyu Archipelago, Japan. Syst Parasitol 84, 89–95 (2013). https://doi.org/10.1007/s11230-012-9395-2

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  • DOI: https://doi.org/10.1007/s11230-012-9395-2

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