Birdlike growth and mixed-age flocks in avimimids (Theropoda, Oviraptorosauria)

doi:10.1038/s41598-019-55038-5

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	Birdlike growth and mixed-age flocks in avimimids (Theropoda, Oviraptorosauria)
	Funston, G. F.2; Currie, P. J.2; Ryan, M. J.1; Dong, Z. -M.3
刊名	SCIENTIFIC REPORTS
	2019-12-11
卷号	9 页码:21
ISSN号	2045-2322
DOI	10.1038/s41598-019-55038-5
通讯作者	Funston, G. F.(Funston@ualberta.ca)
英文摘要	Avimimids were unusual, birdlike oviraptorosaurs from the Late Cretaceous of Asia. Initially enigmatic, new information has ameliorated the understanding of their anatomy, phylogenetic position, and behaviour. A monodominant bonebed from the Nemegt Formation of Mongolia showed that some avimimids were gregarious, but the site is unusual in the apparent absence of juveniles. Here, a second monodominant avimimid bonebed is described from the Iren Dabasu Formation of northern China. Elements recovered include numerous vertebrae and portions of the forelimbs and hindlimbs, representing a minimum of six individuals. Histological sampling of two tibiotarsi from the bonebed reveals rapid growth early in ontogeny followed by unexpectedly early onset of fusion and limited subsequent growth. This indicates that avimimids grew rapidly to adult size, like most extant birds but contrasting other small theropod dinosaurs. The combination of adults and juveniles in the Iren Dabasu bonebed assemblage provides evidence of mixed-age flocking in avimimids and the onset of fusion in young individuals suggests that some of the individuals in the Nemegt Formation bonebed may have been juveniles. Regardless, these individuals were likely functionally analogous to adults, and this probably facilitated mixed-age flocking by reducing ontogenetic niche shift in avimimids.
资助项目	Vanier Canada ; NSERC ; Alberta Innovates ; Dinosaur Research Institute ; NSERC[RGPIN-2017-04715]
WOS关键词	DINOSAUR PARK FORMATION ; IREN DABASU FORMATION ; INNER-MONGOLIA ; BONE ; ALBERTA ; SEDIMENTOLOGY ; STRATIGRAPHY ; PHYSIOLOGY ; TAPHONOMY ; HISTOLOGY
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATURE PUBLISHING GROUP
WOS记录号	WOS:000502612100001
资助机构	Vanier Canada ; NSERC ; Alberta Innovates ; Dinosaur Research Institute ; NSERC
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/16814]
专题	古脊椎动物与古人类研究所_图书馆1
通讯作者	Funston, G. F.
作者单位	1.Carleton Univ, Dept Earth Sci, Ottawa, ON, Canada 2.Univ Alberta, Dept Biol Sci, Edmonton, AB, Canada 3.Inst Vertebrate Paleontol & Paleoanthropol, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Funston, G. F.,Currie, P. J.,Ryan, M. J.,et al. Birdlike growth and mixed-age flocks in avimimids (Theropoda, Oviraptorosauria)[J]. SCIENTIFIC REPORTS,2019,9:21.
APA	Funston, G. F.,Currie, P. J.,Ryan, M. J.,&Dong, Z. -M..(2019).Birdlike growth and mixed-age flocks in avimimids (Theropoda, Oviraptorosauria).SCIENTIFIC REPORTS,9,21.
MLA	Funston, G. F.,et al."Birdlike growth and mixed-age flocks in avimimids (Theropoda, Oviraptorosauria)".SCIENTIFIC REPORTS 9(2019):21.