Investigating Possible Gastroliths in a Referred Specimen of Bohaiornis guoi (Aves: Enantiornithes)

doi:10.3389/feart.2021.635727

IVPP-IR > 中科院古脊椎所（2000年以后）

	Investigating Possible Gastroliths in a Referred Specimen of Bohaiornis guoi (Aves: Enantiornithes)
	Liu, Shumin 1,2; Li, Zhiheng1,3 ; Bailleul, Alida M.1,3; Wang, Min1,3 ; O'Connor, Jingmai1,3,4
	2021-02-19
发表期刊	FRONTIERS IN EARTH SCIENCE
卷号	9 页码:13
通讯作者	Liu, Shumin(liushumin@ivpp.ac.cn) ; O'Connor, Jingmai(jingmai.oconnor@gmail.com)
摘要	Gastroliths, where preserved, can provide indirect evidence regarding diet in extinct avian and non-avian dinosaurs. Masses of gastroliths consistent with the presence of a gastric mill are preserved in many Early Cretaceous Jehol birds mostly belonging to the Ornithuromorpha. Gastroliths are also present in basal birds Sapeornis and Jeholornis in which herbivory is supported by direct evidence these taxa consumed seeds in the form of crop or stomach contents. Although gastroliths have been correlated with herbivory in non-avian dinosaurs, the presence of gastroliths and bone together in Ambopteryx calls this association in to question. Despite being known from greater numbers of specimens than other avian lineages, no unequivocal direct or indirect evidence of diet has been recovered from Jehol deposits for the Enantiornithes. A referred specimen of Bohaiornis guoi IVPP V17963 was described as preserving a small number of gastroliths interpreted as rangle, gastroliths whose function is cleaning the stomach in extant raptorial birds. However, based on comparison with gastroliths in other Jehol birds, it has alternatively been suggested that the identified structures are not ingested stones at all but some unusual mineral precipitate. Considering the limited evidence regarding diet in Enantiornithes and the importance of accurately identifying the traces in Bohaiornis in order to understand the enantiornithine digestive system, we extracted two samples of these purported gastroliths and explored these traces using computerized laminography scanning, scanning electron microscopy, energy dispersive x-ray spectroscopy, ground sections, and body size to gastral mass regressions. Similar analyses were conducted on gastroliths extracted from undisputed gastral masses of two Jehol ornithuromorphs and the non-avian pennaraptoran Caudipteryx. The combined results contradict the hypothesis that these traces are gastroliths and supports the interpretation they are mineral precipitate, most likely authigenic quartz (chalcedony). Although authigenesis is commonly responsible for the preservation of soft tissues, it is unclear if these traces record part of the tissues of this Bohaiornis. This study highlights the importance of a multidisciplinary approach in understanding unusual traces in the fossil record and reveal a previously unidentified taphonomic phenomenon in fossils from Jehol deposits.
关键词	gastrolith Enantiornithes SEM rangle authigeneic mineral siliceous mineral EDS
DOI	10.3389/feart.2021.635727
收录类别	SCI
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000625782600001
出版者	FRONTIERS MEDIA SA
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/18568
专题	中科院古脊椎所（2000年以后）
通讯作者	Liu, Shumin; O'Connor, Jingmai
作者单位	1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.CAS Ctr Excellence Life & Paleoenvironm, Beijing, Peoples R China 4.Field Museum Nat Hist, Chicago, IL 60605 USA
推荐引用方式 GB/T 7714	Liu, Shumin,Li, Zhiheng,Bailleul, Alida M.,et al. Investigating Possible Gastroliths in a Referred Specimen of Bohaiornis guoi (Aves: Enantiornithes)[J]. FRONTIERS IN EARTH SCIENCE,2021,9:13.
APA	Liu, Shumin,Li, Zhiheng,Bailleul, Alida M.,Wang, Min,&O'Connor, Jingmai.(2021).Investigating Possible Gastroliths in a Referred Specimen of Bohaiornis guoi (Aves: Enantiornithes).FRONTIERS IN EARTH SCIENCE,9,13.
MLA	Liu, Shumin,et al."Investigating Possible Gastroliths in a Referred Specimen of Bohaiornis guoi (Aves: Enantiornithes)".FRONTIERS IN EARTH SCIENCE 9(2021):13.