Deanaspis, a new genus of Galeaspida (jawless stem Gnathostomata) from the Silurian of Jiangxi, China, and its evolutionary implications
文献类型：期刊论文
| 作者 | Lin, Xianghong1,3; Zan, Chaoyao2,4; Gai, Zhikun2,3; Zhu, Min2,3 |
| 刊名 | JOURNAL OF SYSTEMATIC PALAEONTOLOGY
 |
| 出版日期 | 2025-12-31 |
| 卷号 | 23期号:1页码:14 |
| 关键词 | Galeaspida Agnatha stem gnathostomes Silurian anatomy phylogeny |
| ISSN号 | 1477-2019 |
| DOI | 10.1080/14772019.2025.2460479 |
| 英文摘要 | 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 |
| WOS关键词 | VERTEBRATES ; AGNATHA ; FAMILY |
| 资助项目 | National Natural Science Foundation of China ; Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences[42130209] ; Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences[92255301] ; National Natural Science Foundation of China[202205AF150002] ; Mee-mann Chang Academician Workstation in Yunnan Province |
| WOS研究方向 | Evolutionary Biology ; Paleontology |
| 语种 | 英语 |
| WOS记录号 | WOS:001445489600001 |
| 出版者 | TAYLOR & FRANCIS LTD |
| 源URL | [http://119.78.100.205/handle/311034/24298]  |
| 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.Yunnan Univ, Inst Palaeontol, Yunnan Key Lab Palaeobiol, Kunming, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, 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. |
入库方式： OAI收割
来源：古脊椎动物与古人类研究所
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