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Redescription of Luetkenia elongata (Copepoda: Siphonostomatoida: Pandaridae), an Ectoparasite of Luvarus imperialis (Actinopterygii: Perciformes: Luvaridae), with a New Record from Japanese Waters
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Abstract
A rare copepod parasitic on marine fish, Luetkenia elongata
Shiino, 1963
(Siphonostomatoida: Pandaridae), is redescribed based on type specimens and additional specimens obtained from Luvarus imperialis Rafinesque, 1810 caught in the eastern and western North Pacific Ocean off California and Japan, respectively. This represents the first record of this parasite from Japanese waters. The copepod differs from its sole congener, L. asterodermi
Claus, 1864
, by following features of the female: fourth pedigerous somite with one pair of elongate posterolateral lobes; genital complex bearing a pair of well-developed posterolateral lobes with one conical protuberance on lateral corner; abdomen clearly longer than wide; and caudal rami more than 2.0 times longer than wide.
Received 16 6月 2016
Accepted 06 10月 2016
Acknowledgments:
We thank Dr. Hironori Komatsu (NSMT) for allowing us to examine type specimens, Mr. Takehiro Sato (KPM) for his curating work, and Dr. Kunihiko Izawa (Izawa Marine Biological Laboratory) for providing valuable information on type specimens. Part of this work was supported by the Japan Society for Promotion of Science (JSPS) KAKENHI Grant Number JP15H06517.
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