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A Silurian placoderm with osteichthyan-like marginal jaw bones
文献类型：期刊论文
| 作者 | Zhu, Min
|
| 刊名 | NATURE
 |
| 出版日期 | 2013 |
| 卷号 | 502期号:7470页码:188—+ |
| 关键词 | FISHES PTYCTODONTIDA INFORMATION INFERENCE MRBAYES ORIGIN |
| ISSN号 | 0028-0836 |
| 通讯作者 | zhumin@ivpp.ac.cn |
| 英文摘要 | The gnathostome (jawed vertebrate) crown group comprises two extant clades with contrasting character complements. Notably, Chondrichthyes (cartilaginous fish) lack the large dermal bones that characterize Osteichthyes (bony fish and tetrapods). The polarities of these differences, and the morphology of the last common ancestor of crown gnathostomes, are the subject of continuing debate. Here we describe a three-dimensionally preserved 419-million-year-old placoderm fish from the Silurian of China that represents the first stem gnathostome with dermal marginal jaw bones (premaxilla, maxilla and dentary), features previously restricted to Osteichthyes. A phylogenetic analysis places the new form near the top of the gnathostome stem group but does not fully resolve its relationships to other placoderms. The analysis also assigns all acanthodians to the chondrichthyan stem group. These results suggest that the last common ancestor of Chondrichthyes and Osteichthyes had a macromeric dermal skeleton, and provide a new framework for studying crown gnathostome divergence. |
| 收录类别 | SCI收录 |
| 原文出处 | 10.1038/nature12617 |
| 公开日期 | 2013-11-27 |
| 源URL | [http://119.78.100.205/handle/311034/4104]  |
| 专题 | 古脊椎动物与古人类研究所_古低等脊椎动物研究室 |
| 推荐引用方式 GB/T 7714 | Zhu, Min. A Silurian placoderm with osteichthyan-like marginal jaw bones[J]. NATURE,2013,502(7470):188—+. |
| APA | Zhu, Min.(2013).A Silurian placoderm with osteichthyan-like marginal jaw bones.NATURE,502(7470),188—+. |
| MLA | Zhu, Min."A Silurian placoderm with osteichthyan-like marginal jaw bones".NATURE 502.7470(2013):188—+. |
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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