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A new oofamily of dinosaur egg from the Upper Cretaceous of tiantai basin,Zhejiang Province,and its mechanism of eggshell formation

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Science Bulletin 2012年第Z2期 3740-3747页

作者： WANG Qiang 1,WANG XiaoLin 1*,ZHAO ZiKui 1 & JIANG YanGen 2 1 Key Laboratory of Evolutionary Systematics of Vertebrates,Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences,Beijing 100044,China 2 tiantai Bureau of Land and Resources of Zhejiang Province,tiantai 317200,China

Here we describe new types of dinosaur eggs found from the Late Cretaceous Chichengshan Formation in the tiantai basin,Zhejiang *** the basis of such characters as small spheroid or near-spheroid,columnar layer composed of three zones,the outer zone consisted of stalagmite-like or coralliform secondary shell units,we established two new oogenera,one new and one combination oospecies:Stalicoolithus shifengensis *** *** Coralloidoolithus shizuiwanensis *** *** addition,re-examination of the holotype of Shixingoolithus erbeni from the Upper Cretaceous Pingling Formation,Guangdong Province reveals that it was erroneously attributed to Spheroolithidae,and should be transferred to ***,we established a new oofamily:Stalicoolithidae *** represents a new model of dinosaur eggshell and thus sheds new light on the formation and evolution of amniotic eggshells.

关键词： dinosaur egg stalicoolthids Upper Cretaceous Chichengshan Formation tiantai basin

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SIMS zircon U-Pb dating of the Late Cretaceous dinosaur egg-bearing red deposits in the tiantai basin,southeastern China

SIMS zircon U-Pb dating of the Late Cretaceous dinosaur egg-...

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中国科学院地质与地球物理研究所2013年度（第13届）学术年会

作者： Huaiyu He Xiaolin Wang Qiang Wang Shunxing Jiang Xin Cheng Jialiang Zhang Zhonghe Zhou Zikui Zhao Yangen Jiang Fangming Yu Chenglong Deng Jinhui Yang Rixiang Zhu Key Laboratory of the Earth's Deep Interior Institute of Geology and GeophysicsChinese Academy of Sciences Key Laboratory of Evolutionary Systematics of Vertebrates Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of Sciences University of Chinese Academy of Sciences tiantai Bureau of Land and Resources of Zhejiang Province Zhejiang Hydrogeology and Engineering Geology Team State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences

Dinosaur eggs or fragments are abundant and extensively distributed in *** can be very informative in biostratigraphic division and correlation of continental strata where other fossils are relatively *** remarkable discoveries of vertebrate fossils,particularly dinosaur eggs and skeletons from the middle and Late Cretaceous of both northern and southern China,there is hardly any direct evidence for the ages of the vertebrate-bearing terrestrial *** constrain their depositional ages,here we have obtained SIMS U-Pb zircon ages from the tuffs interbedded with dinosaur egg-bearing sediments from the Laijia and Chichengshan formations of the terrestrial red deposits of the Late Cretaceous in the tiantai basin,Zhejiang Province,southeastern *** SIMS zircon U-Pb ages from the Laijia and Chichengshan formations are about 96-99 Ma(Cenomanian) and 91-94 Ma(Turanian),respectively,providing direct time constraints on the vertebrate and dinosaur egg evolution in the Late Cretaceous as well as a basis for correlation with terrestrial Cretaceous deposits in other regions of southern and northern China.

关键词： SIMS U-Pb zircon geochronology Late Cretaceous Dinosaur eggs tiantai basin China

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