Kim Sang Lyeol, Choi Hyeongwoo, Eyun Seong-Il, Kim Dongsung, Yu Ok Hwan
Marine Ecosystem and Biological Research Centre, Korea Institute of Ocean Science and Technology, Busan 49111, Korea. E-mail:
Korea Maritime University, Busan 49111, Korea.
Zool Stud. 2022 May 30;61:e21. doi: 10.6620/ZS.2022.61-21. eCollection 2022.
Deep-sea hydrothermal vents are dynamic environments with exotic fauna, including bathymodiolin mussels and scale worm annelids that are often in close association. In this study, we found a new species of (Aphroditiformia: Polynoidae) living in the recently discovered mussel in deep-sea hydrothermal vents and methane seeps at 2,014-2,023 m depth. Based on the morphology and full mitochondrial genome sequences of specimens of from the Onnuri vent field (OVF) on the northern Central Indian Ridge, we describe them as a new species: sp. nov. This species resembles and , but can be distinguished from these species by the shape of the notopodial acicular lobe and the tips of the subacicular neurochaetae. This identity is well-supported by genetic distance and phylogenetic analyses based on the mitochondrial oxidase subunit I () gene, with the new species being closest to the Western Pacific species . Phylogenetic analyses support close relationships between the Indian Ocean and Western Pacific hydrothermal polychaetes. Our data provide a foundation for exploring the evolutionary relationship between scale worms and bathymodiolin mussels.
深海热液喷口是充满奇异动物群的动态环境，其中包括深海贻贝和多鳞虫环节动物，它们常常紧密共生。在本研究中，我们在深度为2014 - 2023米的深海热液喷口和甲烷冷泉中发现了一种新的多鳞虫（多鳞虫科：叶须虫目），它生活在最近发现的贻贝附近。基于中印度洋海岭北部Onnuri喷口区（OVF）标本的形态学和完整线粒体基因组序列，我们将它们描述为一个新物种：新种。该物种与[物种名称1]和[物种名称2]相似，但可以通过背须针状叶的形状和亚针状神经刚毛的尖端与这些物种区分开来。基于线粒体细胞色素氧化酶亚基I（COI）基因的遗传距离和系统发育分析很好地支持了这一分类，新物种与西太平洋物种[物种名称3]最为接近。系统发育分析支持印度洋和西太平洋热液多毛类动物之间的密切关系。我们的数据为探索多鳞虫和深海贻贝之间的进化关系提供了基础。
