Abstract
Three new species of Hatschekia Poche, 1902 are described from the gill filaments of three species of boxfishes captured off southern Japan: H. pseudostracii n. sp. on Kentrocapros aculeatus (Houttuyn) (Aracanidae); H. bibullae n. sp. on Lactoria diaphana (Bloch & Schneider) (Ostraciidae); and H. kuroshioensis n. sp. on Tetrosomus concatenates (Bloch) (Ostraciidae). Of the 93 currently valid species in the genus, these new species differ from the 87 species which lack four stout processes on the posterior margin of the intercoxal sclerites of legs 1 and 2. Those processes are present on the remaining six species and the three new species. Of these nine species, H. pseudostracii n. sp. is distinguished by having a T-shaped chitinous frame on the cephalothorax, the leg 1 exopod twice as long as the endopod and a small parabasal papilla. H. bibullae n. sp. can be differentiated by a combination of morphological features as follows: a well-developed, thumb-shaped parabasal papilla, the leg 1 exopod twice as long as the endopod and a trunk lacking posterior lobes. H. kuroshioensis n. sp. can be recognised by bearing a T-shaped chitinous frame on the cephalothorax, the leg 1 exopod is three times as long as the endopod and the trunk lacks posterior lobes.
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Acknowledgements
We thank Mr Tetsuo Yoshino, Dr Yuichi Hirose and Mr Takeshi Sasaki, University of the Ryukyus, for assistance and permission to use their laboratory facilities. We acknowledge Dr. Fumihito Iwase, Mr. Shu Nakachi and Mr. Kouki Tanaka, Biological Institute on Kuroshio, Kuroshio Biological Research Foundation, for help with fish collection. Thanks are due to Mr. Hirotaka Katahira, Mr. Kenzo Kuwasaki, Ms. Haruna Matsuda and Ms. Su Myat, Hiroshima University, for assistance with the collection of samples. Finally, we would like to thank Dr. Susumu Ohtsuka, Hiroshima University, for valuable suggestions during the study. Part of this work received financial support from the Ocean Exposition Commemorative Park Management Foundation, Okinawa and the Kuroshio Biological Research Foundation, Kochi.
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Uyeno, D., Nagasawa, K. Three new species of Hatschekia Poche, 1902 (Copepoda: Siphonostomatoida: Hatschekiidae) parasitic on boxfishes (Pisces: Tetraodontiformes: Aracanidae and Ostraciidae) in Japanese waters. Syst Parasitol 75, 147–158 (2010). https://doi.org/10.1007/s11230-009-9226-2
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DOI: https://doi.org/10.1007/s11230-009-9226-2