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A new species of Paracrenhydrosoma (Copepoda: Harpacticoida: Cletodidae) from a subtidal muddy bottom of southern Korea, with a key to the species of Acrenhydrosoma-complex

Published online by Cambridge University Press:  03 April 2014

Sung Joon Song
Affiliation:
School of Earth and Environmental Sciences & Research Institute of Oceanography, Seoul National University, Seoul 151-742, Republic of Korea
Hans-Uwe Dahms
Affiliation:
Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, Republic of China
Chang-Rae Lee
Affiliation:
National Park Research Institute, Korea National Park Service, Namwon 590-811, Republic of Korea
Jongseong Ryu
Affiliation:
Department of Marine Biotechnology, Anyang University, Incheon 417-833, Republic of Korea
Jong Seong Khim*
Affiliation:
School of Earth and Environmental Sciences & Research Institute of Oceanography, Seoul National University, Seoul 151-742, Republic of Korea
*
Correspondence should be addressed to: J.S. Khim, School of Earth and Environmental Sciences & Research Institute of Oceanography, Seoul National University, Seoul 151-742, Republic of Korea email: jskocean@snu.ac.kr

Abstract

A new species of Paracrenhydrosoma (Copepoda: Harpacticoida: Cletodidae) is described from samples taken from muddy bottoms in Jangmok, Geoje Island, Korea. The genus Paracrenhydrosoma is distinguished from other genera of the Acrenhydrosoma-complex (Acrenhydrosoma, Dyacrenhydrosoma and Neoacrenhydrosoma) by carrying an antennal exopod with two setae, P1 endopod with three setae, P3 endopod with two setae and P5 exopod with two setae. The new species differs from its congeners as follows: bifid rostrum on anterior margin, long caudal ramus, exceedingly long baseoendopodal mucroniform process of female P5 that reaches the end of the second free abdominal segment, and modified P3 endopod of male. A tabular key to aid in the identification of the Acrenhydrosoma-complex is provided. The worldwide distribution of the Acrenhydrosoma-complex is summarized and discussed.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 2014 

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