KMS Institute of Vertebrate Paleontology and Paleoanthropology
| Deanaspis, a new genus of Galeaspida (jawless stem Gnathostomata) from the Silurian of Jiangxi, China, and its evolutionary implications | |
Lin, Xianghong1,2; Zan, Chaoyao3,4; Gai, Zhikun1,4; Zhu, Min1,4
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| 2025-12-31 | |
| 发表期刊 | JOURNAL OF SYSTEMATIC PALAEONTOLOGY
 |
| ISSN | 1477-2019 |
| 卷号 | 23期号:1页码:14 |
| 摘要 | A new genus and species of Galeaspida, Deanaspis longpingi gen. et sp. nov., is described from a new locality of the Silurian Xikeng Formation (from around 436 million years ago) in De'an County, Jiangxi Province. The new taxon possesses the mosaic characters of Eugaleaspiformes and Xiushuiaspidae, such as the longitudinal oval median dorsal opening in Eugealeaspiformes and the presence of the long postbranchial division of the headshied in Xiushuiaspidae. Accordingly, we erect a new family, Deanaspidae fam. nov., characterized by the longitudinal oval median dorsal opening and the long postbranchial division of the headshield covering the anterior part of the body. Our phylogenetic analysis indicates that Xiushuiaspis, Changxingaspis and Xiyuichthys form a monophyletic group, the family Xiushuiaspidae, and Deanaspidae is resolved to be the sister group of Xiushuiaspidae. Our results reveal that the long postbranchial division of Xiushuiaspidae and Deanaspidae is convergent with the inter-branchial region in polybranchiaspid galeaspids, but can be compared to the postbranchial region in some osteostracans, heterostracans and pituriaspids, and the thoracic armour of placoderms, which protects the viscera in the anterior part of the trunk.https://zoobank.org/urn:lsid:zoobank.org:pub:478B6681-44E7-4430-B91A-76E48C8FE54D |
| 关键词 | Galeaspida Agnatha stem gnathostomes Silurian anatomy phylogeny |
| DOI | 10.1080/14772019.2025.2460479 |
| 关键词[WOS] | VERTEBRATES ; AGNATHA ; FAMILY |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | Mee-mann Chang Academician Workstation in Yunnan Province###3181 ; National Natural Science Foundation of China[202205AF150002]###3180 ; Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences[92255301]###3179 ; Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences[42130209]###3178 ; National Natural Science Foundation of China###1019 |
| WOS研究方向 | Evolutionary Biology ; Paleontology |
| WOS类目 | Evolutionary Biology ; Paleontology |
| WOS记录号 | WOS:001445489600001 |
| 出版者 | TAYLOR & FRANCIS LTD |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.205/handle/311034/24299 |
| 专题 | 中国科学院古脊椎动物与古人类研究所 |
| 通讯作者 | Gai, Zhikun |
| 作者单位 | 1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 2.Yunnan Univ, Inst Palaeontol, Yunnan Key Lab Palaeobiol, Kunming, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China 4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lin, Xianghong,Zan, Chaoyao,Gai, Zhikun,et al. Deanaspis, a new genus of Galeaspida (jawless stem Gnathostomata) from the Silurian of Jiangxi, China, and its evolutionary implications[J]. JOURNAL OF SYSTEMATIC PALAEONTOLOGY,2025,23(1):14. |
| APA | Lin, Xianghong,Zan, Chaoyao,Gai, Zhikun,&Zhu, Min.(2025).Deanaspis, a new genus of Galeaspida (jawless stem Gnathostomata) from the Silurian of Jiangxi, China, and its evolutionary implications.JOURNAL OF SYSTEMATIC PALAEONTOLOGY,23(1),14. |
| MLA | Lin, Xianghong,et al."Deanaspis, a new genus of Galeaspida (jawless stem Gnathostomata) from the Silurian of Jiangxi, China, and its evolutionary implications".JOURNAL OF SYSTEMATIC PALAEONTOLOGY 23.1(2025):14. |
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