New Species and Phylogeny of Alentiana Hartman, 1942 (Annelida, Polynoidae) Reveal Polyphyly of Lepidastheniinae and Key Morphological Character Evolution
文献类型：期刊论文
| 作者 | Wu, Xuwen1,3; Kou, Qi1,3; Li, Yu1,3; Xu, Kuidong1,2,3 |
| 刊名 | JOURNAL OF ZOOLOGICAL SYSTEMATICS AND EVOLUTIONARY RESEARCH
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| 出版日期 | 2026 |
| 卷号 | 2026期号:1页码:20 |
| ISSN号 | 0947-5745 |
| DOI | 10.1155/jzs/1266123 |
| 通讯作者 | Xu, Kuidong(kxu@qdio.ac.cn) |
| 英文摘要 | Alentiana, a genus within the subfamily Lepidastheniinae of Polynoidae, is an obligately commensal deep-sea group exclusively associated with sea anemones. Currently, only two valid species are recognized, with the genus's species diversity and phylogenetic relationships remaining poorly understood. In this study, we systematically investigated polynoid specimens collected from four seamounts in the tropical western Pacific. Integrating morphological observations (including SEM observations of chaetal ultrastructure) and genome skimming data, we describe two new species: Alentiana barnichae sp. nov. and A. fiegei sp. nov., clarifying their morphological diagnostic characters and body size-related intraspecific variations. Phylogenetic analyses based on 13 mitochondrial protein-coding genes and four ribosomal genes revealed that Alentiana forms a well-supported monophyletic clade, which is sister to the deep-sea subfamily Macellicephalinae but not closely related to other genera traditionally assigned to Lepidastheniinae. Lepidastheniinae was clearly recovered as polyphyletic, and notably, it shares terminally inserted lateral antennae with Lepidonotinae without exhibiting a close phylogenetic relationship, thus challenging the reliability of traditional taxonomic characters. Ancestral state reconstruction indicated that terminally or subterminally inserted lateral antennae represent a plesiomorphy of Polynoidae, while deeply incised neuropodia are a product of convergent evolution presumably driven by ecological pressures and cannot serve as an exclusive diagnostic character for Lepidastheniinae. This study enriches the species diversity and geographical distribution records of Alentiana, clarifies its phylogenetic position, and provides insights for revising the taxonomic system of Polynoidae and understanding the evolution of key morphological traits. |
| WOS关键词 | POLYCHAETA ; COMMENSAL ; GENUS ; ALIGNMENTS ; SELECTION ; REVISION ; BIOLOGY ; GENERA |
| 资助项目 | Chinese Academy of Sciences[CAS-TAX-24-033] ; Natural Science Foundation of Shandong Province[ZR2025MS691] ; Institute of Oceanology, Chinese Academy of Sciences[IOCASZZZX301] |
| WOS研究方向 | Evolutionary Biology ; Zoology |
| 语种 | 英语 |
| WOS记录号 | WOS:001729908300001 |
| 出版者 | WILEY |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/205069]  |
| 专题 | 海洋研究所_海洋生物分类与系统演化实验室 |
| 通讯作者 | Xu, Kuidong |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Qingdao Marine Sci & Technol Ctr, Lab Marine Biol & Biotechnol, Qingdao 266071, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Lab Marine Organism Taxon & Phylogeny, Shandong Prov Key Lab Marine Biodivers & Bioresour, Qingdao 266071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Xuwen,Kou, Qi,Li, Yu,et al. New Species and Phylogeny of Alentiana Hartman, 1942 (Annelida, Polynoidae) Reveal Polyphyly of Lepidastheniinae and Key Morphological Character Evolution[J]. JOURNAL OF ZOOLOGICAL SYSTEMATICS AND EVOLUTIONARY RESEARCH,2026,2026(1):20. |
| APA | Wu, Xuwen,Kou, Qi,Li, Yu,&Xu, Kuidong.(2026).New Species and Phylogeny of Alentiana Hartman, 1942 (Annelida, Polynoidae) Reveal Polyphyly of Lepidastheniinae and Key Morphological Character Evolution.JOURNAL OF ZOOLOGICAL SYSTEMATICS AND EVOLUTIONARY RESEARCH,2026(1),20. |
| MLA | Wu, Xuwen,et al."New Species and Phylogeny of Alentiana Hartman, 1942 (Annelida, Polynoidae) Reveal Polyphyly of Lepidastheniinae and Key Morphological Character Evolution".JOURNAL OF ZOOLOGICAL SYSTEMATICS AND EVOLUTIONARY RESEARCH 2026.1(2026):20. |
入库方式： OAI收割
来源：海洋研究所
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