New species, redescriptions and new records of deep-sea brittle stars (Echinodermata: Ophiuroidea) from the South China Sea, an integrated morphological and molecular approach----深海科学与工程研究所

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论文题目	New species, redescriptions and new records of deep-sea brittle stars (Echinodermata: Ophiuroidea) from the South China Sea, an integrated morphological and molecular approach
论文题目（英文）	New species, redescriptions and new records of deep-sea brittle stars (Echinodermata: Ophiuroidea) from the South China Sea, an integrated morphological and molecular approach
作者	HASITHA NETHUPUL JAYASEKARA SUBASINGHE ARACHCHIGE;Stohr, Sabine;张海滨
发表年度	2022-04-06
卷	810
期
页码	1-95
期刊名称	EUROPEAN JOURNAL OF TAXONOMY
摘要	蛇尾是棘皮动物中种类最多的类群，约有2100个已知种，在全世界海洋中广泛分布，多栖息于海底，也有些种类附着在珊瑚、海绵上，是海洋底栖生物的主要类群之一。相比于浅海，由于受到深海采样与观测技术的限制，人们对深海物种的认识仍然十分有限，这严重影响了对深海生物多样性水平的评估。研究团队针对2016-2021年通过深海勇士号载人深潜器，在南海、西北太平洋等海域采集的深海蛇尾样品，进行了形态学和分子系统学研究，鉴定出4个目、7个科、15个属的共36种深海蛇尾。其中包括7个新物种，研究人员分别对其进行了描述和命名（两个新物种以深海勇士号命名），还有15个物种在南海或西北太平洋海域属于首次被发现（新记录种），这些结果为进一步理解南海和西北太平洋的深海蛇尾生物多样性提供了重要数据。同时，在文章中，研究人员还对棘蛇尾和蔓蛇尾等几个主要蛇尾类群的分类学形态特征进行了详细比较分析，为这些类群中深海蛇尾的分类和形态鉴定工作提供了的科学依据。
摘要_英文	Deep-sea ophiuroids were collected by the manned submersible 'Shenhaiyongshi' from the South China Sea at depths of 500-3550 m, in 2017 to 2020. A total of 18 species were identified, including three new species and eight new records, increasing the total number of species known from the South China Sea to 304. Most of the ophiuroids recorded from the South China Sea were found in shallow waters (77.9%) and a few of them occurred only in deep water (20.4%). Three new species are described as Ophiacantha aster sp. nov., Ophiomoeris petalis sp. nov. and Ophiopristis shenhaiyongshii sp. nov. We provide comprehensive descriptions of morphological features, including characteristics of the arm skeletons, and a phylogenetic analysis based on COI and 16S sequences. Overall intraspecific and interspecific genetic distance variations among the families found in this study were 0.5% to 2.47% and 1.16% to 44.16%, respectively, along the South Pacific region to the South China Sea. Our phylogenetic analysis suggested that COI partial genes resolved the interspecies complexity in the class Ophiuroidea better than 16S partial genes. The order Euryalida had low interspecies genetic distance variation within the class Ophiuroidea. The present study suggests a high probability that species of Asteroschema and Gorgonocephalus are more widely spread around the Indo-Pacific region than previously expected.