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A new eyeless species of Nereis (Annelida, Nereididae) from deep-sea sediments of the northern South China Sea

A variety of nereidid species have been reported from the South China Sea, although little is known about the deep-sea species in this area. Recently, two specimens belonging to a novel nereidid polychaete were collected from a sedimentary habitat during an environmental survey to a deep-sea basin w...

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Autores principales: Lin, Jun-Hui, Huang, Ya-Qin, Liang, Qian-Yong, He, Xue-Bao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Pensoft Publishers 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9836637/
https://www.ncbi.nlm.nih.gov/pubmed/36761110
http://dx.doi.org/10.3897/zookeys.1134.94198
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author Lin, Jun-Hui
Huang, Ya-Qin
Liang, Qian-Yong
He, Xue-Bao
author_facet Lin, Jun-Hui
Huang, Ya-Qin
Liang, Qian-Yong
He, Xue-Bao
author_sort Lin, Jun-Hui
collection PubMed
description A variety of nereidid species have been reported from the South China Sea, although little is known about the deep-sea species in this area. Recently, two specimens belonging to a novel nereidid polychaete were collected from a sedimentary habitat during an environmental survey to a deep-sea basin where cold seeps occur. This new species, Nereistricirratasp. nov., is described herein, based on morphological and molecular analyses. The most noteworthy feature is the absence of eyes on the prostomium; it can be distinguished from other eyeless Nereis species by the arrangement of conical paragnaths on the pharynx, the nature of homogomph falcigers and the shape of notopodial lobes in posterior chaetigers. The reconstructed phylogenetic tree, using concatenated sequences of mtCOI, 16S, and 18S rRNA, showed that all Nereis species included in this study form a monophyletic clade with full support. The mtCOI-based interspecific comparisons revealed a high genetic divergence (23.1%–37.3% K2P) from four-eyed Nereis species with the available sequences. This is the first record of an eyeless Nereis species in the South China Sea.
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spelling pubmed-98366372023-02-08 A new eyeless species of Nereis (Annelida, Nereididae) from deep-sea sediments of the northern South China Sea Lin, Jun-Hui Huang, Ya-Qin Liang, Qian-Yong He, Xue-Bao Zookeys Research Article A variety of nereidid species have been reported from the South China Sea, although little is known about the deep-sea species in this area. Recently, two specimens belonging to a novel nereidid polychaete were collected from a sedimentary habitat during an environmental survey to a deep-sea basin where cold seeps occur. This new species, Nereistricirratasp. nov., is described herein, based on morphological and molecular analyses. The most noteworthy feature is the absence of eyes on the prostomium; it can be distinguished from other eyeless Nereis species by the arrangement of conical paragnaths on the pharynx, the nature of homogomph falcigers and the shape of notopodial lobes in posterior chaetigers. The reconstructed phylogenetic tree, using concatenated sequences of mtCOI, 16S, and 18S rRNA, showed that all Nereis species included in this study form a monophyletic clade with full support. The mtCOI-based interspecific comparisons revealed a high genetic divergence (23.1%–37.3% K2P) from four-eyed Nereis species with the available sequences. This is the first record of an eyeless Nereis species in the South China Sea. Pensoft Publishers 2022-12-05 /pmc/articles/PMC9836637/ /pubmed/36761110 http://dx.doi.org/10.3897/zookeys.1134.94198 Text en Jun-Hui Lin, Ya-Qin Huang, Qian-Yong Liang, Xue-Bao He https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Lin, Jun-Hui
Huang, Ya-Qin
Liang, Qian-Yong
He, Xue-Bao
A new eyeless species of Nereis (Annelida, Nereididae) from deep-sea sediments of the northern South China Sea
title A new eyeless species of Nereis (Annelida, Nereididae) from deep-sea sediments of the northern South China Sea
title_full A new eyeless species of Nereis (Annelida, Nereididae) from deep-sea sediments of the northern South China Sea
title_fullStr A new eyeless species of Nereis (Annelida, Nereididae) from deep-sea sediments of the northern South China Sea
title_full_unstemmed A new eyeless species of Nereis (Annelida, Nereididae) from deep-sea sediments of the northern South China Sea
title_short A new eyeless species of Nereis (Annelida, Nereididae) from deep-sea sediments of the northern South China Sea
title_sort a new eyeless species of nereis (annelida, nereididae) from deep-sea sediments of the northern south china sea
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9836637/
https://www.ncbi.nlm.nih.gov/pubmed/36761110
http://dx.doi.org/10.3897/zookeys.1134.94198
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