PDF(Pubmed)
Abstract：
The ophiuroid genus Ophioplinthaca is well characterized by the deep incisions in the disc. Prior to this study, it contained 32 accepted species, but species limits and geographic distributions were not well understood. The manned submersible vehicle \'Shenhaiyongshi\' was used to collect ophiuroid specimens from the deep-sea seamounts and cold seeps in the South China Sea and Northwest Pacific at 602-3600 m depth, during 2018 to 2020. The genus Ophioplinthaca was reviewed using both morphological data and a phylogenetic analysis, based on COI sequences. The taxonomic status of the genus Ophiophthalmus Matsumoto, 1917, a junior homonym of Ophiophthalmus Fitzinger, 1843 (a reptile) was clarified by proving prevailing usage of the ophiuroid name. A total of eight species were identified, including two new species, described asOphioplinthacabrachispina sp. nov. and Ophiophthalmusserratus sp. nov., and two new records. The new species are characterized by unique features of the arm skeletons. Tabular keys to all Ophioplinthaca and Ophiophthalmus species are provided. Interspecific and intraspecific genetic distance of Ophioplinthaca species ranged from 2.32% to 19.72%, and from 0.26% to 0.90%, respectively. The data suggest that species of the genus Ophioplinthaca are more widely spread around the Northwest Pacific region deep-sea seamounts than previously known.
摘要：
Ophioplinthaca类的特征是椎间盘的深切口。在这项研究之前，它包含32个公认的物种，但是物种限制和地理分布还没有得到很好的理解。载人潜水器"神海永石"在南海和西北太平洋602-3600米深度的深海海山和冷渗水处采集类蛇类标本,2018年至2020年。使用形态学数据和系统发育分析对Ophioplinthaca属进行了审查，基于COI序列。松本蛇眼属的分类地位，1917年，OphiophimusFitzinger的初级谐音，1843年（爬行动物）通过证明ophiuroid名称的普遍用法得到了澄清。共鉴定出8种,包括两个新物种，描述为Ophioplinthacabrachispinasp.11月。和明眼。11月。,和两个新记录。新物种的特征是手臂骨骼的独特特征。提供了所有蛇形和蛇眼物种的表格键。Ophioplinthaca物种的种间和种内遗传距离范围为2.32％至19.72％，从0.26%到0.90%，分别。数据表明，Ophiopplinthaca属的物种在西北太平洋地区深海海山周围的分布比以前已知的更广泛。
