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

doi:10.1017/pab.2024.9

IVPP-IR

	Electron backscatter diffraction (EBSD) study of elongatoolithid eggs from China with microstructural and parataxonomic implications
	Zhu, Xufeng 1,2,3; Wang, Qiang1 ; Wang, Xiaolin1,3,4
	2024-04-25
发表期刊	PALEOBIOLOGY
ISSN	0094-8373
页码	16
通讯作者	Wang, Qiang(wangqiang@ivpp.ac.cn)
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.
DOI	10.1017/pab.2024.9
关键词[WOS]	2 MEDICINE FORMATION ; DINOSAUR EGGS ; EGGSHELLS ; CRYSTALLOGRAPHY ; PROVINCE ; MONGOLIA ; OOGENUS ; MONTANA ; INSIGHT ; CLUTCH
收录类别	SCI
语种	英语
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
项目资助者	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
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology ; Evolutionary Biology ; Paleontology
WOS类目	Biodiversity Conservation ; Ecology ; Evolutionary Biology ; Paleontology
WOS记录号	WOS:001207535900001
出版者	CAMBRIDGE UNIV PRESS
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/23630
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.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins Chinese, Beijing 100044, Peoples R China 2.Natl Nat Hist Museum China, Beijing 100050, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 4.Nanjing Univ, Ctr Res & Educ Biol Evolut & Environm, Nanjing 210023, 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.