KMS Institute of Vertebrate Paleontology and Paleoanthropology
| A Jurassic ceratosaur from China helps clarify avian digital homologies | |
| Xu, Xing1; Clark, James M.2; Mo, Jinyou3,4; Choiniere, Jonah2; Forster, Catherine A.2; Erickson, Gregory M.5; Hone, David W. E.1; Sullivan, Corwin1; Eberth, David A.6; Nesbitt, Sterling7; Zhao, Qi1; Hernandez, Rene8; Jia, Cheng-kai9; Han, Feng-lu1,10; Guo, Yu1,10; xingxu@vip.sina.com | |
| 2009-06-18 | |
| 发表期刊 | NATURE
 |
| ISSN | 0028-0836 |
| 卷号 | 459期号:7249页码:940-944 |
| 文章类型 | Article |
| 摘要 | Theropods have traditionally been assumed to have lost manual digits from the lateral side inward, which differs from the bilateral reduction pattern seen in other tetrapod groups. This unusual reduction pattern is clearly present in basal theropods, and has also been inferred in non-avian tetanurans based on identification of their three digits as the medial ones of the hand (I-II-III). This contradicts the many developmental studies indicating II-III-IV identities for the three manual digits of the only extant tetanurans, the birds. Here we report a new basal ceratosaur from the Oxfordian stage of the Jurassic period of China (156-161 million years ago), representing the first known Asian ceratosaur and the only known beaked, herbivorous Jurassic theropod. Most significantly, this taxon possesses a strongly reduced manual digit I, documenting a complex pattern of digital reduction within the Theropoda. Comparisons among theropod hands show that the three manual digits of basal tetanurans are similar in many metacarpal features to digits II-III-IV, but in phalangeal features to digits I-II-III, of more basal theropods. Given II-III-IV identities in avians, the simplest interpretation is that these identities were shared by all tetanurans. The transition to tetanurans involved complex changes in the hand including a shift in digit identities, with ceratosaurs displaying an intermediate condition. |
| 关键词 | Abelisauroid Dinosauria Theropoda Evolution Hand Differentiation Madagascar Expression Morphology Reduction Patterns |
| WOS标题词 | Science & Technology |
| URL | 查看原文 |
| 关键词[WOS] | ABELISAUROID DINOSAURIA ; THEROPODA ; EVOLUTION ; HAND ; DIFFERENTIATION ; MADAGASCAR ; EXPRESSION ; MORPHOLOGY ; REDUCTION ; PATTERNS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS研究方向 | Science & Technology - Other Topics |
| WOS类目 | Multidisciplinary Sciences |
| WOS记录号 | WOS:000267063500033 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.205/handle/311034/4735 |
| 专题 | 中科院古脊椎所（2000年以后） |
| 通讯作者 | xingxu@vip.sina.com |
| 作者单位 | 1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 2.George Washington Univ, Dept Biol Sci, Washington, DC 20052 USA 3.Nat Hist Museum Guangxi, Nanning 530012, Guangxi, Peoples R China 4.China Univ Geosci, Fac Earth Sci, Wuhan 430074, Hubei, Peoples R China 5.Florida State Univ, Dept Biol Sci, Tallahassee, FL 32306 USA 6.Royal Tyrrell Museum, Drumheller, AB T0J 0Y0, Canada 7.Amer Museum Nat Hist, New York, NY 10024 USA 8.Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, Mexico 9.Xinjiang Oilfield Co, Res Inst Explorat & Dev, Karamay 834000, Xinjiang, Peoples R China 10.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Xing,Clark, James M.,Mo, Jinyou,et al. A Jurassic ceratosaur from China helps clarify avian digital homologies[J]. NATURE,2009,459(7249):940-944. |
| APA | Xu, Xing.,Clark, James M..,Mo, Jinyou.,Choiniere, Jonah.,Forster, Catherine A..,...&xingxu@vip.sina.com.(2009).A Jurassic ceratosaur from China helps clarify avian digital homologies.NATURE,459(7249),940-944. |
| MLA | Xu, Xing,et al."A Jurassic ceratosaur from China helps clarify avian digital homologies".NATURE 459.7249(2009):940-944. |
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