A gravid lizard from the Cretaceous of China and the early history of squamate viviparity
文献类型：期刊论文
| 作者 | Wang, Yuan2; Evans, Susan E.1; wangyuan@ivpp.ac.cn; ucgasue@ucl.ac.uk |
| 刊名 | NATURWISSENSCHAFTEN
 |
| 出版日期 | 2011-09-01 |
| 卷号 | 98期号:9页码:739-743 |
| 关键词 | Viviparity Squamata Reptilia Cretaceous China |
| ISSN号 | 0028-1042 |
| 文献子类 | Article |
| 英文摘要 | Although viviparity is most often associated with mammals, roughly one fifth of extant squamate reptiles give birth to live young. Phylogenetic analyses indicate that the trait evolved more than 100 times within Squamata, a frequency greater than that of all other vertebrate clades combined. However, there is debate as to the antiquity of the trait and, until now, the only direct fossil evidence of squamate viviparity was in Late Cretaceous mosasauroids, specialised marine lizards without modern equivalents. Here, we document viviparity in a specimen of a more generalised lizard, Yabeinosaurus, from the Early Cretaceous of China. The gravid female contains more than 15 young at a level of skeletal development corresponding to that of late embryos of living viviparous lizards. This specimen documents the first occurrence of viviparity in a fossil reptile that was largely terrestrial in life, and extends the temporal distribution of the trait in squamates by at least 30 Ma. As Yabeinosaurus occupies a relatively basal position within crown-group squamates, it suggests that the anatomical and physiological preconditions for viviparity arose early within Squamata. |
| URL标识 | 查看原文 |
| WOS关键词 | LIVE BIRTH ; REPTILIAN VIVIPARITY ; MARINE REPTILES ; OSSIFICATION ; EVOLUTION ; PATTERNS ; SEX |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000293969200003 |
| 公开日期 | 2013-11-27 |
| 源URL | [http://119.78.100.205/handle/311034/4396]  |
| 专题 | 古脊椎动物与古人类研究所_图书馆1 |
| 通讯作者 | wangyuan@ivpp.ac.cn; ucgasue@ucl.ac.uk |
| 作者单位 | 1.UCL, Dept Cell & Dev Biol, London WC1E 6BT, England 2.Chinese Acad Sci, Key Lab Evolutionary Systemat Vertebrates, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Yuan,Evans, Susan E.,wangyuan@ivpp.ac.cn,et al. A gravid lizard from the Cretaceous of China and the early history of squamate viviparity[J]. NATURWISSENSCHAFTEN,2011,98(9):739-743. |
| APA | Wang, Yuan,Evans, Susan E.,wangyuan@ivpp.ac.cn,&ucgasue@ucl.ac.uk.(2011).A gravid lizard from the Cretaceous of China and the early history of squamate viviparity.NATURWISSENSCHAFTEN,98(9),739-743. |
| MLA | Wang, Yuan,et al."A gravid lizard from the Cretaceous of China and the early history of squamate viviparity".NATURWISSENSCHAFTEN 98.9(2011):739-743. |
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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