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Electron backscatter diffraction (EBSD) study of elongatoolithid eggs from China with microstructural and parataxonomic implications

文献类型：期刊论文

作者Zhu, Xufeng2,3,4; Wang, Qiang4; Wang, Xiaolin1,2,4
刊名PALEOBIOLOGY
出版日期2024-04-25
页码16
ISSN号0094-8373
DOI10.1017/pab.2024.9
通讯作者Wang, Qiang(wangqiang@ivpp.ac.cn)
英文摘要Electron backscatter diffraction (EBSD) has been widely used in recent studies of eggshells for its convenience in collecting in situ crystallographic information. China has a wide variety of dinosaur eggshells, although nearly none have been studied with this technique. Elongatoolithid eggs include many oogenera, although the microstructural differences of some were not highly appreciated, leading to several parataxonomic problems. In this paper, we surveyed seven elongatoolithid oogenera in China using EBSD in order to acquire more information about their microstructural variation. It is shown in this paper that in some elongatoolithid eggshells, scaly calcite grains that form the squamatic ultrastructure are not the only form of calcite in the continuous layer. Large columnar grains separated by high-angled grain boundaries and slender subgrains separated by radially arranged low-angled grain boundaries could exist in certain areas of the eggshells such as Macroolithus and Macroelongatoolithus. This paper discusses the criteria for identifying squamatic ultrastructure and proposes type I (rich in rugged high-angled grain boundaries) and type II (rich in both rugged high- and low-angled grain boundaries) squamatic ultrastructures. A pathological layer is found in Undulatoolithus pengi. An external zone is identified in the eggshell of Heishanoolithus changii, which does not support its position within the oofamily Elongatoolithidae. We argue that Paraelongatoolithus no longer belongs to Elongatoolithidae based on a combination of reticulated ornamentation, columnar continuous layer, and acicular mammillae. The high structural variation in elongatoolithid eggshells also implies that it may be inappropriate to relate all previous elongatoolithid eggshells to oviraptorosaurs and assume they are non-monophyletic.
WOS关键词2 MEDICINE FORMATION ; DINOSAUR EGGS ; EGGSHELLS ; CRYSTALLOGRAPHY ; PROVINCE ; MONGOLIA ; OOGENUS ; MONTANA ; INSIGHT ; CLUTCH
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences[42288201] ; Strategic Priority Research Program of the Chinese Academy of Sciences[41672012] ; National Natural Science Foundation of China[XDB26000000] ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Beijing Government
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology ; Evolutionary Biology ; Paleontology
语种英语
WOS记录号WOS:001207535900001
出版者CAMBRIDGE UNIV PRESS
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Beijing Government
源URL[http://119.78.100.205/handle/311034/23629]  
专题中国科学院古脊椎动物与古人类研究所
通讯作者Wang, Qiang
作者单位1.Nanjing Univ, Ctr Res & Educ Biol Evolut & Environm, Nanjing 210023, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
3.Natl Nat Hist Museum China, Beijing 100050, Peoples R China
4.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins Chinese, Beijing 100044, Peoples R China
推荐引用方式
GB/T 7714		 Zhu, Xufeng,Wang, Qiang,Wang, Xiaolin. Electron backscatter diffraction (EBSD) study of elongatoolithid eggs from China with microstructural and parataxonomic implications[J]. PALEOBIOLOGY,2024:16.
APA Zhu, Xufeng,Wang, Qiang,&Wang, Xiaolin.(2024).Electron backscatter diffraction (EBSD) study of elongatoolithid eggs from China with microstructural and parataxonomic implications.PALEOBIOLOGY,16.
MLA Zhu, Xufeng,et al."Electron backscatter diffraction (EBSD) study of elongatoolithid eggs from China with microstructural and parataxonomic implications".PALEOBIOLOGY (2024):16.

入库方式： OAI收割

来源：古脊椎动物与古人类研究所

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