A 3D braincase of the early jawed vertebrate Palaeospondylus from Australia
文献类型：期刊论文
| 作者 | Burrow, Carole J.1; Young, Gavin C.2,3; Lu, Jing4,5 |
| 刊名 | NATIONAL SCIENCE REVIEW
 |
| 出版日期 | 2025-01-21 |
| 页码 | 9 |
| 关键词 | Australia Early Devonian gnathostome Palaeospondylus braincase |
| ISSN号 | 2095-5138 |
| DOI | 10.1093/nsr/nwae444 |
| 通讯作者 | Lu, Jing(lujing@ivpp.ac.cn) |
| 英文摘要 | Palaeospondylus gunni Traquair, 1890, is represented by thousands of similarly preserved articulated fossils from the Achannaras quarry (similar to 390 Mya) in Caithness, Scotland. With radically different interpretations of its structure, it has been assigned to almost all major jawless and jawed vertebrate groups. Here we report a new and older species of Palaeospondylus from the Early Devonian of Australia (c. 400 Ma), investigated using high-resolution computed tomography. Its 3D-preserved braincase demonstrates a combination of primitive gnathostome features including an anteriorly positioned transverse cranial fissure of uncertain homology, a large dorsal fontanelle and a small hypophysial fossa. Contrary to recent interpretations of P. gunni, the new braincase shows that Palaeospondylus lacks both a postorbital process and an intracranial joint. Our new Australian species extends the history of Palaeospondylus back some 10 million years prior to its occurrence in Scotland. The newly identified neurocranial characters have been coded into a phylogenetic analysis that places Palaeospondylus as a sister group of the Chondrichthyes, but some neurocranial characters could indicate a phylogenetic position within the gnathostome stem group. This paper describes a new Australian species of an enigmatic 400-million-year-old fossil vertebrate, Palaeospondylus, previously only known from Scotland. The 3D preservation of the new specimens facilitates a much better understanding of the skeletal anatomy of this unusual jawed vertebrate. |
| WOS关键词 | ONTOGENIC DEVELOPMENT ; EARLY EVOLUTION ; LABYRINTH |
| 资助项目 | ARC[DP 0772138] ; ARC[0558499] ; ARC[1092870] ; National Natural Science Foundation of China[42130209] |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:001400470300001 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | ARC ; National Natural Science Foundation of China |
| 源URL | [http://119.78.100.205/handle/311034/24216]  |
| 专题 | 中国科学院古脊椎动物与古人类研究所 |
| 通讯作者 | Lu, Jing |
| 作者单位 | 1.Queensland Museum, Geosci, Hendra 4011, Australia 2.Australian Natl Univ, Dept Mat Phys, Canberra 2600, Australia 3.Australian Museum, Res Inst, Sydney, NSW 2010, Australia 4.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Burrow, Carole J.,Young, Gavin C.,Lu, Jing. A 3D braincase of the early jawed vertebrate Palaeospondylus from Australia[J]. NATIONAL SCIENCE REVIEW,2025:9. |
| APA | Burrow, Carole J.,Young, Gavin C.,&Lu, Jing.(2025).A 3D braincase of the early jawed vertebrate Palaeospondylus from Australia.NATIONAL SCIENCE REVIEW,9. |
| MLA | Burrow, Carole J.,et al."A 3D braincase of the early jawed vertebrate Palaeospondylus from Australia".NATIONAL SCIENCE REVIEW (2025):9. |
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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