Uninterrupted growth in a non-polar hadrosaur explains the gigantism among duck-billed dinosaurs

doi:10.1111/pala.12473

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	Uninterrupted growth in a non-polar hadrosaur explains the gigantism among duck-billed dinosaurs
	Slowiak, Justyna 3; Szczygielski, Tomasz 3; Ginter, Michal 1; Fostowicz-Frelik, Lucja 2,3
刊名	PALAEONTOLOGY
	2020-01-30
页码	21
关键词	bone growth dynamics gigantism hadrosaur histology dinosaur
ISSN号	0031-0239
DOI	10.1111/pala.12473
通讯作者	Szczygielski, Tomasz(t.szczygielski@twarda.pan.pl)
英文摘要	Duck-billed dinosaurs (Hadrosauridae) were the most common ornithopods of the Late Cretaceous. Second only to sauropods and in many cases exceeding the sizes of the largest land mammals (such as indricotheres or proboscideans), they are among the largest terrestrial herbivores to have walked the Earth. Despite their gigantic size, diversity and abundance, their growth strategies remain poorly understood. Here, we examine the bone microstructure of several Mongolian hadrosauroids of varied adult sizes. The small and middle-sized species have lines of arrested growth (LAGs). On the other hand, one of the largest duck-billed dinosaurs, Saurolophus angustirostris, shows uninterrupted growth, comparable with other big hadrosaurs for which the lack of cyclical growth arrests was interpreted as a result of living in the polar region. Since both of the studied taxa inhabited warmer, continental, monsoon-influenced environments of the Late Cretaceous Mongolia, we propose that the absence of LAGs is not a climatic-driven condition but rather connected with the animal's size (i.e. ontogeny). Our results show that, like sauropods, hadrosaurs changed their growth dynamics from cyclical to continuous during their evolution, which made it possible for them to achieve comparable body sizes.
资助项目	Willi Henning Society
WOS关键词	LONG-BONE HISTOLOGY ; ASIAN ORNITHOPODS DINOSAURIA ; PHYLOGENETIC INFERENCE ; ARRESTED GROWTH ; TELL US ; ORNITHISCHIA ; AGE ; EVOLUTION ; DYNAMICS ; TURTLES
WOS研究方向	Paleontology
语种	英语
出版者	WILEY
WOS记录号	WOS:000510160200001
资助机构	Willi Henning Society
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/17077]
专题	古脊椎动物与古人类研究所_图书馆1
通讯作者	Szczygielski, Tomasz
作者单位	1.Univ Warsaw, Fac Geol, Zwirki & Wigury 93, PL-02089 Warsaw, Poland 2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, 142 Xizhimenwai St, Beijing 100044, Peoples R China 3.Polish Acad Sci, Inst Paleobiol, Dept Evolutionary Paleobiol, Twarda 51-55, PL-00818 Warsaw, Poland
推荐引用方式 GB/T 7714	Slowiak, Justyna,Szczygielski, Tomasz,Ginter, Michal,et al. Uninterrupted growth in a non-polar hadrosaur explains the gigantism among duck-billed dinosaurs[J]. PALAEONTOLOGY,2020:21.
APA	Slowiak, Justyna,Szczygielski, Tomasz,Ginter, Michal,&Fostowicz-Frelik, Lucja.(2020).Uninterrupted growth in a non-polar hadrosaur explains the gigantism among duck-billed dinosaurs.PALAEONTOLOGY,21.
MLA	Slowiak, Justyna,et al."Uninterrupted growth in a non-polar hadrosaur explains the gigantism among duck-billed dinosaurs".PALAEONTOLOGY (2020):21.