KMS Nanjing Institute of Geology and Palaeonotology,CAS
A Cretaceous symmetrodont therian with some monotreme-like postcranial features | |
Li, G (李罡); Luo, ZX | |
2006-01-12 | |
发表期刊 | NATURE |
ISSN | 0028-0836 |
卷号 | 439期号:7073页码:195-200 |
摘要 | A new spalacotheriid mammal preserved with a complete postcranium and a partial skull has been discovered from the Yixian Formation(1-3) of Liaoning, China. Spalacotheroid symmetrodonts(4-11) are relatives to modern therians ( combined group of marsupials and placentals) and are characterized by many skeletal apomorphies of therians. But unlike the closely related spalacotheroids and living therians, this new mammal revealed some surprisingly convergent features to monotremes in the lumbar vertebrae, pelvis and hindlimb(12,13). These peculiar features may have developed as functional convergence to locomotory features of monotremes, or the presence of lumbar ribs in this newly discovered mammal and their absence in its close relatives might be due to evolutionary developmental homoplasy. Analysis including this new taxon suggests that spalacotheroids evolved earlier in Eurasia and then dispersed to North America, in concordance with prevailing geodispersal patterns of several common mammalian groups during the Early Cretaceous period. |
DOI | 10.1038/nature04168 |
语种 | 英语 |
关键词[WOS] | Mammalian Evolution ; Mesozoic Mammals ; Skeleton ; China |
WOS研究方向 | Science & Technology - Other Topics |
WOS类目 | Multidisciplinary Sciences |
WOS记录号 | WOS:000234538400038 |
出版者 | NATURE PUBLISHING GROUP |
文献类型 | 期刊论文 |
条目标识符 | http://ir.nigpas.ac.cn/handle/332004/528 |
专题 | 中国科学院南京地质古生物研究所 其他 |
通讯作者 | Luo, ZX |
作者单位 | 1.Carnegie Museum Nat Hist, Pittsburgh, PA 15213 USA 2.Nanjing Univ, Dept Earth Sci, Nanjing 200017, Peoples R China 3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China |
推荐引用方式 GB/T 7714 | Li, G ,Luo, ZX. A Cretaceous symmetrodont therian with some monotreme-like postcranial features[J]. NATURE,2006,439(7073):195-200. |
APA | Li, G ,&Luo, ZX.(2006).A Cretaceous symmetrodont therian with some monotreme-like postcranial features.NATURE,439(7073),195-200. |
MLA | Li, G ,et al."A Cretaceous symmetrodont therian with some monotreme-like postcranial features".NATURE 439.7073(2006):195-200. |
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