New toothed Early Cretaceous ornithuromorph bird reveals intraclade diversity in pattern of tooth loss
文献类型：期刊论文
| 作者 | Wang, Min1,2 ; O'Connor, Jingmai K.1,2; Zhou, Shuang1,2; Zhou, Zhonghe1,2
|
| 刊名 | JOURNAL OF SYSTEMATIC PALAEONTOLOGY
 |
| 出版日期 | 2019-11-09 |
| 页码 | 15 |
| 关键词 | Cretaceous bird dentition tooth loss homoplasy Jehol Biota Ornithuromorpha phylogeny Schizooura |
| ISSN号 | 1477-2019 |
| DOI | 10.1080/14772019.2019.1682696 |
| 通讯作者 | Wang, Min(wangmin@ivpp.ac.cn) |
| 英文摘要 | The earliest record of the Ornithuromorpha, which includes crown birds, is currently known from the Early Cretaceous Jehol Biota in north-eastern China. Here we describe a new ornithuromorph bird, Mengciusornis dentatus gen. et sp. nov., from the Jiufotang Formation of this biota. Mengciusornis preserves a suite of morphological features exclusively observed among ornithuromorphs in the sympatric taxon Schizooura, including a robust and 'V'-shaped furcula with a short hypocleidium, and a humerus with a large, rectangular deltopectoral crest in which the distodorsal corner is distinctively developed into a sharp, angular point. The results of our phylogenetic analysis recover these two species together in a clade, positioned stemward within the Ornithuromorpha. Mengciusornis has toothed premaxillae, in stark contrast with the edentulous jaws of Schizooura, demonstrating that dentition varied considerably between some closely related species. Furthermore, all previously known Jehol ornithuromorphs with toothed premaxillae have an edentulous rostral portion of the element, suggesting that tooth loss in this clade proceeded from the rostral end caudally, whereas in Mengciusornis the premaxilla lacks this edentulous rostral tip although the maxilla and dentary are toothless, indicating that the pattern of tooth loss, not unexpectedly, varied between lineages of ornithuromorphs. This observation suggests a strong degree of plasticity in the developmental mechanisms regulating tooth and beak formation, which is supported by earlier evidence that indicates teeth have been lost multiple times within Aves and Dinosauria. Mengciusornis preserves a ventrally hooked scapular acromion that is convergently evolved in parallel with some enantiornithines and neornithines, providing further evidence of the homoplasy that characterizes avian evolution. http://zoobank.org/urn:lsid:zoobank.org:pub:311B34B9-1CBF-47A6-B821-650C04560137 |
| WOS关键词 | ENANTIORNITHINE AVES ORNITHOTHORACES ; EVOLUTION ; CHINA ; SKULL ; MORPHOLOGY ; REDUCTION ; INSIGHT |
| 资助项目 | Key Research Program of Frontier Sciences, CAS[ZDBS-LY-DQC002] ; National Natural Science Foundation of China[41722202] ; National Natural Science Foundation of China[41688103] |
| WOS研究方向 | Evolutionary Biology ; Paleontology |
| 语种 | 英语 |
| WOS记录号 | WOS:000495727100001 |
| 出版者 | TAYLOR & FRANCIS LTD |
| 资助机构 | Key Research Program of Frontier Sciences, CAS ; National Natural Science Foundation of China |
| 源URL | [http://119.78.100.205/handle/311034/16954]  |
| 专题 | 古脊椎动物与古人类研究所_图书馆1 |
| 通讯作者 | Wang, Min |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 2.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Min,O'Connor, Jingmai K.,Zhou, Shuang,et al. New toothed Early Cretaceous ornithuromorph bird reveals intraclade diversity in pattern of tooth loss[J]. JOURNAL OF SYSTEMATIC PALAEONTOLOGY,2019:15. |
| APA | Wang, Min,O'Connor, Jingmai K.,Zhou, Shuang,&Zhou, Zhonghe.(2019).New toothed Early Cretaceous ornithuromorph bird reveals intraclade diversity in pattern of tooth loss.JOURNAL OF SYSTEMATIC PALAEONTOLOGY,15. |
| MLA | Wang, Min,et al."New toothed Early Cretaceous ornithuromorph bird reveals intraclade diversity in pattern of tooth loss".JOURNAL OF SYSTEMATIC PALAEONTOLOGY (2019):15. |
入库方式： OAI收割
来源：古脊椎动物与古人类研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。