Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Taxonomic Review of Cottiusculus nihonkaiensis (Cottoidei: Cottidae) from Korea

한국산 점줄횟대 Cottiusculus nihonkaiensis(둑중개아목, 둑중개과)의 분류학적 재검토

  • Ju-Won Jin (Department of Marine Biology, Pukyong National University) ;
  • ChungBae Kang (Department of Biodiversity) ;
  • Jin-Koo Kim (Department of Marine Biology, Pukyong National University)
  • 진주원 (부경대학교 해양생물학과) ;
  • 강충배 (국립해양생물자원관) ;
  • 김진구 (부경대학교 해양생물학과)
  • Received : 2023.03.02
  • Accepted : 2023.05.12
  • Published : 2023.05.31
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Abstract

The genus Cottiusculus Jordan and Starks 1904 (Cottoidei: Cottidae) comprises four species worldwide, three species in Japan, and two species in Korea. Cottiusculus species are characterized by a compressed head and body without scales, except for lateral-line scales, a preopercle with four spines, a curved uppermost preopercular spine with small dorsal spines, and teeth on the upper jaws, vomer, and palatines. Two Cottiusculus species have been recorded in Korea: Cottiusculus gonez and Cottiusculus nihonkaiensis. Among these, "jeom-jul-hoet-dae" specimens were initially identified as Cottiusculus schmidti by many Korean Ichthyologists. However, since C. nihonkaiensis was reported by Kai and Nakabo (2009), most such specimens have been identified as C. nihonkaiensis. To clarify the taxonomic status of "jeom-jul-hoet-dae", we conducted morphological and molecular analyses collected from the coasts of South Korea, and compared our findings with previous reports. Japanese and Korean C. nihonkaiensis specimens mostly consistent in some proportional measurements, our molecular results indicate that they are the same species. C. nihonkaiensis, "jeom-jul-hoet-dae" distinguished from other congers by combination of following characters: simple nasal spines, two branched cirri at the upper jaw, cirri at the opercular, preopercular, and lateral lines, and a number of blotches below the lateral line.

둑중개아목 (Cottoidei), 둑중개과 (Cottidae), 꼬마횟대속(Cottiusculus)은 전 세계적으로 4종, 일본에 3종, 국내에 2종이 보고되어 있다. 꼬마횟대속 어류는 머리와 몸이 종편되어 있고 피부아래 측선 비늘을 제외하면 비늘이 없는 것이 특징이며, 4개의 전새개골 가시를 가지고 가장 위쪽 전새개골 가시가 등쪽을 향한 작은 가시와 함께 휘어져 있는 것이 특징이다. 그 외 위턱, 서골, 구개골에 이빨을 가진다. 꼬마횟대속에 속하는 종으로는 국내에 꼬마횟대 (C. gonez)와 점줄횟대 (C. nihonkaiensis)가 있다. 이 중 국내 점줄횟대는 초기에는 많은 어류학자들이 Cottiusculus schmidti로 사용하였지만, Cottiusculus nihonkaiensis가 Kai and Nakabo (2009)에 의해 보고된 이후 대부분 C. nihonkaiensis로 사용되었다. 본 연구는 한국산 점줄횟대의 분류학적 위치를 명확히 하기 위해 한국에서 채집된 점줄횟대 형태와 분자 분석을 수행하였으며, 기존에 보고된 문헌들과 비교 분석하였다. 한국산 점줄횟대는 C. schmidti와 달리 비극(nasal spines)이 단순했고 주상악골 극모(MX, maxillary cirrus)가 두 갈래였으며, 눈 위에 안상골 극모(SOC, supraorbital cirrus), 아가미뚜껑에 주새개골 극모(OP, opercular cirrus), 전새개골 극모(PO, preopercular cirrus) 그리고 측선 극모(LLP, lateral line cirri)가 나 있었다. 또한, 측선아래 얼룩 개수가 적었다. 일본산 점줄횟대와 한국산 점줄횟대는 체장에 대한 비율이 대부분 일치하였다. 그리고, 분자계통분석결과 역시 한국과 일본 두 지역의 점줄횟대가 잘 일치하는 결과를 보여, 이러한 특징을 종합적으로 검토하면 한국산 점줄횟대는 C. nihonkaiensis인 것으로 사료된다.

Keywords

Acknowledgement

표본 대여에 도움을 주신 국립해양생물자원관 권혁준 박사님께 감사드립니다. 이 논문은 국립해양생물자원관 '해양생명자원기탁등록보존기관 운영(2023)' 사업의 지원을 받아 수행되었습니다.

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