| 尖吻兽（Akidolestes）的齿列和头后骨骼 |
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| 引用本文： | 陈萌,罗哲西.尖吻兽（Akidolestes）的齿列和头后骨骼[J].地质学报,2008,82(2):155-164. |
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| 作者姓名： | 陈萌 罗哲西 |
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| 作者单位： | 1. 南京大学地球科学系,南京,210093
2. 南京大学地球科学系,南京,210093;美国卡内基自然历史博物馆,匹兹堡,15213 |
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| 基金项目： | 本项研究得到了中国国家自然科学基金海外青年科学家基金海外表年科学家基金项目--"中国的侏罗-白垩纪哺乳动物的系统和形态演化"(40328004).感谢中国科学院南京地持古生物所的陈丕基研究员和李罡研究员面上项目(40572005)对此研究的资助和大力支持. |
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| 摘 要： | 尖吻兽（Akidolestes）是新近在中国辽宁省下白垩统义县组地层发现的对齿兽动物,保存了非常完整的头后骨骼。其齿列特征表明它属于鼹兽超科（Spalacotheroidea）中的鼹兽科动物（Spalacotheriidae）,该科是以臼齿齿尖呈对称三角形排列、上下臼齿反转咬合为特征的单系类群,是现生兽类（有袋类和有胎盘类）的近亲,拥有许多兽类骨骼的原始特征。尖吻兽区别于张和兽科的特征是具有更宽大的下颌冠状突和臼齿齿尖呈更小的锐角排列。对尖吻兽的骨骼解剖学和比较形态特征的研究,表明尖吻兽演化模式是一种
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| 关 键 词： | 尖吻兽 齿列 头后骨骼 陆栖生活 树栖生活 |
| 收稿时间： | 2008/12/2 0:00:00 |
| 修稿时间： | 2007年8月28日 |
Morphology of Dentition and Postcranial Skeleton of Akidolestes |
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| CHEN Meng and LUO Zhexi.Morphology of Dentition and Postcranial Skeleton of Akidolestes[J].Acta Geologica Sinica,2008,82(2):155-164. |
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| Authors: | CHEN Meng and LUO Zhexi |
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| Institution: | Department of Earth Sciences, Nanjing University, 210093;Carnegie Museum of Natural History, 4400 forbes Avenue, Pittsburgh 15213, USA |
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| Abstract: | Akidolestes cifellii Li and Luo,2006(NIGPAS 139281A,B) is a new symmetrodont mammal with complete postcranial skeleton discovered in Yixian Fromation,Lower Creatacous,Liaoning province,China.It has been diagnosed as a member of family spalacotheriidae included in superfamily spalacotheroidea.The spalacotheriidae is a monophyletic group;characteristic by the reversed triangular molar.It is the close relative to extant therians(metatherians and eutherians),with a lot of primitive features.Akidolestes differs from zhangheotheriids in having much broader coronoid process of dentary and more acute angled molars.The skeletal anatomical and morphological comparative study indicates that the evolution of Akidolestes is mosaic pattern combing the primitive and the derived skeletal features.Akidolestes probably shares both terrestrial and arboreal locomotory adaptation,but it is not specialized in either aspects. |
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| Keywords: | Akidolestes Dentition Postcranial Skeleton Terrestrial Adaptation Arboreal Adaptation |
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