检索结果-南通市图书馆

male spike strobiles with Gnetum affinity from the Early Cretaceous in western Liaoning,Northeast China

Journal of Systematics and Evolution 2009年第2期47卷 93-102页

作者： 1,2Shuang-Xing GUO 3Jin-Geng SHA 4Li-Zeng BIAN 5Yin-Long QIU 1(Department of Palaeobotany and Palynology,Nanjing Institute of Geology and Paleontology,Chinese Academy of Sciences,Nanjing 210008,China) 2(Laboratory of Biodiversity and Biogeography,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming 650204,China) 3(State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing 210008,China) 4(College of Earth Sciences,Nanjing University,Nanjing 210093,China) 5(Department of Ecology & Evolutionary Biology,The University Herbarium,University of Michigan,Ann Arbor,MI 48109-1048,USA) Department of Palaeobotany and Palynology Nanjing Institute of Geology and Paleontology Chinese Academy of Sciences Nanjing 210008 China Laboratory of Biodiversity and Biogeography Kunming Institute of Botany Chinese Academy of Sciences Kunming 650204 China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing 210008 China College of Earth Sciences Nanjing University Nanjing 210093 China Department of Ecology & Evolutionary Biology The University Herbarium University of Michigan Ann Arbor MI 48109–1048 USA

A fossil with Gnetum affinity was found in the Jianshangou Member(Barremian Age) of the Yixian Formation(Lower Cretaceous Epoch) of the Jehol Group in western Liaoning,northeastern *** single fossil specimen is represented by both elongate-cylindrical male spike strobiles which borne within a nodal bract of cauliflorous *** spike strobiles have apparent nodes,invisible internodes,and numerous verticillate involucral *** microsporangiate units within involucral collars are not *** male spike strobiles with verticillate involucral collars occur exclusively in Gnetum;hence,the fossil strobiles are attributed to a new taxon,Khitania columnispicata gen.& ***.,being closely related to *** general isotopic dating suggests an age of Barremian,ca.125-122 million years(Myr) ago for the Jianshangou *** palaeoecological and palaeoclimatic inference based on the compositions of flora and fauna,and lithological characters of the fossil locality suggests that the fossil plants grew in a subtropical mesophytic forest and under a warmer *** remains of male spike strobiles are the first record of gnetalean *** documents the evolution of the distinct gnetoid morphology and indicates a wider range of distribution of Gnetaceae in the Early Cretaceous than present day.

关键词： biogeography Early Cretaceous Gnetum affinity male spike strobiles northeastern China

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

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

语言

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

语言

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：