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西太平洋马里亚纳海沟附近海山的金相柳珊瑚属(珊瑚虫纲:软珊瑚目:金柳珊瑚科)二新纪录种
徐 雨, 李 阳, 徐奎栋
中国科学院海洋研究所
摘要:
海山是大洋中独特的生境,成为深海生物多样性研究与保护的热点区域。热带西太平洋海山众多,但真正开展探索的却很少。金相柳珊瑚属Metallogorgia Versluys, 1902是一类生活于深海硬底的珊瑚类群,目前已知的仅有四种。由于标本采获不易,分类研究欠缺,许多分类性状亟待补足描述和澄清。本研究利用“发现”号ROV对西太平洋马里亚纳海沟附近的M2海山进行了采样调查,获得了三个深水金相柳珊瑚样本。通过光学显微镜和扫描电镜观察,鉴定其为黑发金相柳珊瑚(M. melanotrichos (Wright & Studer, 1889))和长刺金相柳珊瑚(M. macrospina Kükenthal, 1919)。这两种金相柳珊瑚均为该区域的新纪录种,本文对其做了详细的形态特征描述,并依据特征形态对该属所有物种做了分类检索。
关键词:  八放珊瑚亚纲  钙轴珊瑚亚目  金相柳珊瑚属  分类  深海
DOI:10.11759/hykx20190312001
分类号:
基金项目:科技基础资源调查专项 (2017FY100804); 青岛海洋科学与技术国家实验室鳌山科技创新计划项目 (2016ASKJ05)
First records of two species of Metallogorgia (Anthozoa: Alcyonacea: Chrysogorgiidae) from a seamount near the Mariana Trench in the Western Pacific Ocean
xu yu, li yang, xu kui dong
Institute of Oceanology, Chinese Academy of Sciences
Abstract:
Seamounts with their unique habitat have been the hotspot of deep-sea biodiversity research and protection. There are numerous seamounts in the tropical Western Pacific, where only a few have been explored. The genus Metallogorgia Versluys, 1902 is a golden coral group living on deep-sea hard substrate. So far, only four species have been described. Due to the difficulty in specimen collection and the lack of taxonomic studies, many taxonomic characters remain unclear and need to be redescribed. Based on the collection of three specimens of Metallogorgia with the remotely operated vehicle (ROV) “FAXIAN” from a seamount near the Mariana Trench in the Western Pacific Ocean, we conducted taxonomic study based on light and scanning electronic microscopic observation. These specimens were identified as M. melanotrichos (Wright & Studer, 1889) and M. macrospina Kükenthal, 1919. Both species are new records of this sea area. We provided detailed morphological descriptions for both species and a dichotomous key to all known species of Metallogorgia.
Key words:  Octocorallia  Calcaxonia  Metallogorgia  taxonomy  deep sea
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