Jurassic shuotheriids show earliest dental diversification of mammaliaforms
文献类型：期刊论文
| 作者 | Mao, Fangyuan1,2; Li, Zhiyu7; Wang, Zhili7; Zhang, Chi2; Rich, Thomas5,6; Vickers-Rich, Patricia4,5,6; Meng, Jin1,3 |
| 刊名 | NATURE
 |
| 出版日期 | 2024-04-18 |
| 卷号 | 628期号:8008页码:25 |
| ISSN号 | 0028-0836 |
| DOI | 10.1038/s41586-024-07258-7 |
| 通讯作者 | Mao, Fangyuan(maofangyuan@ivpp.ac.cn) ; Meng, Jin(jmeng@amnh.org) |
| 英文摘要 | Shuotheriids are Jurassic mammaliaforms that possess pseudotribosphenic teeth in which a pseudotalonid is anterior to the trigonid in the lower molar, contrasting with the tribosphenic pattern of therian mammals (placentals, marsupials and kin) in which the talonid is posterior to the trigonid(1-4). The origin of the pseudotribosphenic teeth remains unclear, obscuring our perception of shuotheriid affinities and the early evolution of mammaliaforms(1,5-9). Here we report a new Jurassic shuotheriid represented by two skeletal specimens. Their complete pseudotribosphenic dentitions allow reidentification of dental structures using serial homology and the tooth occlusal relationship. Contrary to the conventional view(1,2,6,10,11), our findings show that dental structures of shuotheriids can be homologized to those of docodontans and partly support homologous statements for some dental structures between docodontans and other mammaliaforms(6,12). The phylogenetic analysis based on new evidence removes shuotheriids from the tribosphenic ausktribosphenids (including monotremes) and clusters them with docodontans to form a new clade, Docodontiformes, that is characterized by pseudotribosphenic features. In the phylogeny, docodontiforms and 'holotherians' (Kuehneotherium, monotremes and therians)(13) evolve independently from a Morganucodon-like ancestor with triconodont molars by labio-lingual widening their posterior teeth for more efficient food processing. The pseudotribosphenic pattern passed a cusp semitriangulation stage(9), whereas the tribosphenic pattern and its precursor went through a stage of cusp triangulation. The two different processes resulted in complex tooth structures and occlusal patterns that elucidate the earliest diversification of mammaliaforms. |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:001401542500001 |
| 出版者 | NATURE PORTFOLIO |
| 源URL | [http://119.78.100.205/handle/311034/24245]  |
| 专题 | 中国科学院古脊椎动物与古人类研究所 |
| 通讯作者 | Mao, Fangyuan; Meng, Jin |
| 作者单位 | 1.Amer Museum Nat Hist, Div Paleontol, New York, NY 10024 USA 2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Evolutionary Systemat Vertebrates, Beijing, Peoples R China 3.CUNY, Earth & Environm Sci, New York, NY 10021 USA 4.Curtin Univ, Sch Earth & Planetary Sci, Perth, WA, Australia 5.Monash Univ, Sch Earth Atmosphere & Environm, Melbourne, Vic, Australia 6.Museums Victoria, Melbourne, Vic, Australia 7.Inner Mongolia Museum Nat Hist, Hohhot, Peoples R China |
| 推荐引用方式 GB/T 7714 | Mao, Fangyuan,Li, Zhiyu,Wang, Zhili,et al. Jurassic shuotheriids show earliest dental diversification of mammaliaforms[J]. NATURE,2024,628(8008):25. |
| APA | Mao, Fangyuan.,Li, Zhiyu.,Wang, Zhili.,Zhang, Chi.,Rich, Thomas.,...&Meng, Jin.(2024).Jurassic shuotheriids show earliest dental diversification of mammaliaforms.NATURE,628(8008),25. |
| MLA | Mao, Fangyuan,et al."Jurassic shuotheriids show earliest dental diversification of mammaliaforms".NATURE 628.8008(2024):25. |
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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