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Abstract
A redescription of the chondracanthid copepod Pseudacanthocanthopsis secunda (Yamaguti and Yamasu, Citation1960) is provided based on adult females collected from the Indian perch, Apogon lineatus Temminck and Schlegel, 1842, captured in the Seto Inland Sea, Japan, and the East China Sea off Japan and Korea, along with additional material from the fine-patterned puffer Takifugu poecilonotus (Temminck and Schlegel, 1850) and red seabream Pagrus major (Temminck and Schlegel, 1843) captured in the Seto Inland Sea. The male of P. secunda is also described for the first time. Our results revealed that P. secunda is a valid member of Pseudacanthocanthopsis, and it can be distinguished from the other three congeners by having one ventrolateral and two anterior pairs of rounded head processes, a reniform trunk, a double row of teeth along the concave margin of the mandible and a lateral swelling on the leg 1 protopod in the female. http://www.zoobank.org/urn:lsid:zoobank.org:pub:7AD5211F-66EF-464A-B9C9-E21C19ECFDC7
Acknowledgements
We extend our gratitude to Drs Jung-Goo Myoung, Sung-Yong Oh (Korea Institute of Ocean Science & Technology) and Ho Young Soh (Chonnam National University) for assistance with collecting fish samples in Korea. This research was made possible through financial support from the Korea Research Council of Fundamental Science and Technology and KIOST Projects (PK08080, PE98747, PE98811) to the senior author, Japan Society for Promotion of Science (JSPS) Postdoctoral Fellowship (Grant No. 21-09117) to D.T., JSPS Doctoral Fellowship (Grant No. 22-8247) to I.M. and JSPS Grant-in-Aid (No. 2038110) awarded to S.O. Acknowledge the national marine life collection program (project) sponsored by the Ministry of land, transport and maritime affairs, Korea (MABIK 2012-001-03).