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A new record of the species Caprella arimotoi (Crustacea: Amphipoda: Caprellidae) from Korean waters

Journal of Species Research / Journal of Species Research, (E)2713-8615
2020, v.9 no.4, pp.443-447
허준행 (단국대학교(천안캠퍼스))
최재홍 (단국대학교)
김영효 (단국대학교)
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Abstract

A newly recorded species Caprella arimotoi Takeuchi, 1993, belonging to the family Caprellidae Leach, 1814, was collected from the South Sea, Korea. This species is morphologically very similar to Caprella verrucosa Boeck, 1871, with blunt dorsal projections on pereonites, oval-shaped propodus on gnathopod 2, and grasping spines on the pereopods 5-7. Caprella arimotoi originated from C. verrucosa and are difficult to distinguish because they have mixed characteristics. However, C. arimotoi was classified because of several morphological differences. The newly recorded species C. arimotoi is discernible from . verrucosa by a forwardly curved anterodorsal projection on head, elongated gills, slender pereopod 7, and lacking ventrolateral projections on pereonites 2-7. To date, C. arimotoi has only been reported in Japanese waters. So, our record is the first record in Korean waters and outside of Japan. In this study, the Korean C. arimotoi is illustrated based on the mature male specimens with a brief description of the female, focusing on the sexually dimorphic characters.

keywords
Amphipoda, Caprellidae, Caprella arimotoi, Korea, new record species

참고문헌

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Journal of Species Research