检索结果-南通市图书馆

Tooth loss and alveolar remodeling in Sinosaurus triassicus (Dinosauria: Theropoda) from the Lower Jurassic strata of the Lufeng Basin, China

引用

Chinese Science Bulletin 2013年第16期58卷 1931-1935页

作者： XING LiDa bell phil r rOTHSCHILD Bruce M rAN Hao ZHANG JianPing DONG ZhiMing ZHANG Wei CUrrIE philip J Department of Biological Sciences University of Alberta School of the Earth Sciences and resources China University of Geosciences Pipestone Creek Dinosaur Initiative Division of Vertebrate Paleontology Natural History Museum and Biodiversity Research Institute University of Kansas Key Laboratory of Ecology of rare and Endangered Species and Environmental Protection (Guangxi Normal University) Ministry of Education Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Department of Computer Engineering Chengdu Electromechanical College

Pathological or traumatic loss of teeth often results in the resorption and remodeling of the affected alveoli in mammals. However, instances of alveolar remodeling in reptiles are rare. A remodeled alveolus in the maxilla of the Chinese theropod Sinosaurus (Lower Jurassic Lower Lufeng Formation) is the first confirmed example of such dental pathology in a dinosaur. Given the known relationship between feeding behavior and tooth damage in theropods (teeth with spalled enamel, tooth crowns embedded in bone) and the absence of dentary, maxillary, and premaxillary osteomyelitis, traumatic loss of a tooth is most likely the cause of alveolar remodeling. Based on the extent of remodeling, the injury and subsequent tooth loss were non-fatal in this individual.

关键词：下侏罗统兽脚类牙齿肺泡中国恐龙禄丰盆地地层

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

An Unusual, Three-Dimensionally Preserved, Large Hadrosauriform Pes Track from "Mid"-Cretaceous Jiaguan Formation of Chongqing, China

引用

Acta Geologica Sinica(English Edition) 2012年第2期86卷 304-312页

作者： XING Lida phil r.bell JeraldD.HArrIS philip J.CUrrIE Department of Biological Sciences University of Alberta11455 Saskatchewan DriveEdmontonAlberta T6G 2E9Canada Key Laboratory of Evolutionary Systematics of Vertebrates Chinese Academy of SciencesPO Box 643100044 BeijingChina Pipestone Creek Dinosaur Initiative ClairmontAlberta TOH OWOCanada. Physical Sciences Department Dixie State College225 South 700 EastSt.GeorgeUtah 84770USA

Three-dimensional tracks provide unique insights into the locomotor mechanics of their track makers. An isolated, large hadrosauriform print attributable to Caririchnium lotus from the ＂mid＂-Cretaceous Lotus track site （Jiaguan Formation） in China permits reconstruction of the footfall, weight-bearing, and kick-off phases of the step cycle. Large-scale modifications of the pes during the step cycle indicate C. lotus trackmakers were capable of locomotory modifications in response to substrate consistency beyond the ＂expected＂ shift between bipedal and quadrupedal postures. An unusual curvature to the trace of one of the outer digits indicates substantial transverse mobility. The remaining digits demonstrate lesser degrees of transverse movement accompanied by extension of the digits during footfall. The absence of overprinted scale-scratch marks and toe drags are consistent with a vertical kick-off of the pes and concomitant flexion of the digits. This track suggests that pedal mobility in C. lotus track makers was greater than previously suspected and has implications for reconstructions of hadrosauriform locomotion.

关键词： hadrosauriform locomotion footprints Cretaceous step cycle

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

带来机遇的泰国自由贸易区

引用

中国海关 2007年第4期 70-71页

作者： robert Smith phil bell 安永华明会计师事务所

泰国自由贸易区的建立,既为政府打造亚洲首选制造基地的梦想带来了更多实效,也为制造企业带来了诸多实惠。对泰国这样的发展中国家来说,经济的发展也许要更多地依赖政策层面的创新和摸索。

关键词：自由贸易区泰国税收体制国内市场制造基地多产品进口税负

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：