Embryology of Early Jurassic dinosaur from China with evidence of preserved organic remains

IVPP-IR > 古低等脊椎动物研究室

	Embryology of Early Jurassic dinosaur from China with evidence of preserved organic remains
	Reisz, Robert R.1; Huang, Timothy D.2; Roberts, Eric M.3; Peng, ShinRung 4; Sullivan, Corwin 5; Stein, Koen 6; LeBlanc, Aaron R. H.1; Shieh, DarBin 4; Chang, RongSeng 7; Chiang, ChengCheng 8; Yang, Chuanwei 9; Zhong, Shiming 10; robert.reisz@utoronto.ca
	2013-04-11
发表期刊	NATURE
ISSN	0028-0836
卷号	496 期号:7444 页码:210-214
文章类型	Article
摘要	Fossil dinosaur embryos are surprisingly rare, being almost entirely restricted to Upper Cretaceous strata that record the late stages of non-avian dinosaur evolution(1,2). Notable exceptions are the oldest known embryos from the Early Jurassic South African sauropodomorph Massospondylus(3,4) and Late Jurassic embryos of a theropod from Portugal(5). The fact that dinosaur embryos are rare and typically enclosed in eggshells limits their availability for tissue and cellular level investigations of development. Consequently, little is known about growth patterns in dinosaur embryos, even though post-hatching ontogeny has been studied in several taxa(6). Here we report the discovery of an embryonic dinosaur bone bed from the Lower Jurassic of China, the oldest such occurrence in the fossil record. The embryos are similar in geological age to those of Massospondylus and are also assignable to a sauropodomorph dinosaur, probably Lufengosaurus(7). The preservation of numerous disarticulated skeletal elements and eggshells in this monotaxic bone bed, representing different stages of incubation and therefore derived from different nests, provides opportunities for new investigations of dinosaur embryology in a clade noted for gigantism. For example, comparisons among embryonic femora of different sizes and developmental stages reveal a consistently rapid rate of growth throughout development, possibly indicating that short incubation times were characteristic of sauropodomorphs. In addition, asymmetric radial growth of the femoral shaft and rapid expansion of the fourth trochanter suggest that embryonic muscle activation played an important role in the pre-hatching ontogeny of these dinosaurs. This discovery also provides the oldest evidence of in situ preservation of complex organic remains in a terrestrial vertebrate.
关键词	Tyrannosaurus-rex Soft-tissue Massospondylus Theropods Protein
WOS标题词	Science & Technology
URL	查看原文
关键词[WOS]	TYRANNOSAURUS-REX ; SOFT-TISSUE ; MASSOSPONDYLUS ; THEROPODS ; PROTEIN
收录类别	SCI
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000317346300039
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/4179
专题	古低等脊椎动物研究室
通讯作者	robert.reisz@utoronto.ca
作者单位	1.Univ Toronto, Dept Biol, Mississauga, ON L5L 1C6, Canada 2.Natl Chung Hsing Univ, Taichung 402, Taiwan 3.James Cook Univ, Sch Earth & Environm Sci, Townsville, Qld 4811, Australia 4.Natl Cheng Kung Univ, Coll Med, Inst Oral Med, Tainan 701, Taiwan 5.Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Evolutionary Systemat Vertebrates, Beijing 100044, Peoples R China 6.Univ Bonn, Steinmann Inst Geol Mineral & Palaontol, D-53115 Bonn, Germany 7.Natl Cent Univ, Dept Opt & Photon, Chungli 32001, Taiwan 8.Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan 9.Lufeng Cty Dinosaur Museum, Lufeng, Yunnan, Peoples R China 10.Chuxiong Prefectural Museum, Chuxiong 675000, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Reisz, Robert R.,Huang, Timothy D.,Roberts, Eric M.,et al. Embryology of Early Jurassic dinosaur from China with evidence of preserved organic remains[J]. NATURE,2013,496(7444):210-214.
APA	Reisz, Robert R..,Huang, Timothy D..,Roberts, Eric M..,Peng, ShinRung.,Sullivan, Corwin.,...&robert.reisz@utoronto.ca.(2013).Embryology of Early Jurassic dinosaur from China with evidence of preserved organic remains.NATURE,496(7444),210-214.
MLA	Reisz, Robert R.,et al."Embryology of Early Jurassic dinosaur from China with evidence of preserved organic remains".NATURE 496.7444(2013):210-214.