2018年至2020年间，“深海勇士”号载人潜水器在中国南海和西北太平洋地区的深海海山（深度：602-1920 m）采集的蛇尾，共鉴定出9种，包括2个新种和7个中国南海新记录种和西北太平洋地区的一个新纪录种。两个新种被命名为 Asteroschema shenhaiyongshii sp. nov. 和 Asteroschema domogranulatum sp. nov. 七个新记录包括来自 Asteroschema 属的五个物种，以及来自 Asterostegus 和 Astrodendrum 属的各一个物种。我们进行了形态特征的全面描述，包括腕部骨片的特征，以及基于 16S 和 COI 序列的系统发育分析。本研究发现 Euryalida 物种的种内遗传距离范围为 0.34% 至 1.38%，与蛇尾纲中的其他目相比相对较低，Euryalida 目物种在印度-太平洋地区的分布范围比以前预期的要高。

Ophiuroids were collected by the manned submersible 'Shenhaiyongshi' from the deep-sea seamounts in the South China Sea and Northwest Pacific regions at 602-1920 m depth, during 2018 to 2020. A total of nine species was identified, including two new species and seven new records from the South China Sea and one new record from the Northwest Pacific region. Two new species are described as Asteroschema shenhaiyongshii sp. nov. and Asteroschema domogranulatum sp. nov. The seven new records included five species from the genus Asteroschema, and one species each from the genera Asterostegus and Astrodendrum. Comprehensive descriptions of morphological features are provided, including characteristics of the arm skeleton, as well as a phylogenetic analysis based on 16S and COI sequences. Intraspecific genetic distance ranges of Euryalida species from the present study were 0.34% to 1.38%, which was relatively low compared to other orders in the class Ophiuroidea. The present study suggests a high probability that species of the order Euryalida are more widely spread around the Indo-Pacific region than previously expected.