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e-ased.org, vol. 34, no. 4, pp.199-207, 2018

DOI: https://doi.org/10.5635/ASED.2018.34.4.199

A New Record of Symmius caudatus (Crustacea, Isopoda, Chaetiliidae) from Korea, with the First Description of Male

Sung Hoon Kim1, Seong Myeong Yoon2,*

Affiliation: 1Department of Life Sciences, College of Natural Sciences, Chosun University, Gwangju 61452, Korea 2Department of Biology, College of Natural Sciences, Chosun University, Gwangju 61452, Korea

Abstract: A chaetiliid isopod, Symmius caudatus Richardson, 1904 is newly recorded from Korea with detailed description and illustrations. This species is characterized by the following features: head has well-defined ocular lobes anteriorly projecting; all pereonites do not have any projections dorsally; maxillule has 2 long plumose and 1 short denticulate setae on inner lobe; propodus of pereopod 1 has 11 stout circumplumose setae on ventral margin in female; and pereopod 7 is ambulatory. In this paper, we present the descriptions and illustrations of mature and juvenile males, which have not been known from previous studies, as well as those of female. We also suggested a revised diagnosis of the genus Symmius.

Keyword: Isopoda, Korea, male, morphology, Symmius, taxonomy