New basal eutherian mammal from the Early Cretaceous Jehol biota, Liaoning, China

IVPP-IR > 中科院古脊椎所（2000年以后）

	New basal eutherian mammal from the Early Cretaceous Jehol biota, Liaoning, China
	Hu, Yaoming 2; Meng, Jin1 ; Li, Chuankui2 ; Wang, Yuanqing2 ; jmeng@amnh.org
	2010-01-22
发表期刊	PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
ISSN	0962-8452
卷号	277 期号:1679 页码:229-236
文章类型	Article
摘要	A new genus and species of eutherian mammal, Acristatherium yanensis gen. et sp. nov., is described from the Early Cretaceous Jehol biota, China. The new taxon is based on a partial skull that is preserved in three dimensions from the Lujiatun bed of the Yixian Formation and dated 123.2+/-1.0 Ma. Its right upper and lower dentitions are nearly complete and it has a dental formula 4.1.5.3/3.1.5.3. The new mammal reveals several craniodental characteristics of Early Cretaceous eutherians previously unknown in fossil records of therians, such as a possible vestige of the septomaxilla. The craniodental features of the new taxon are compared with those of relevant Early Cretaceous eutherians and therians. Phylogenetic analyses based on a data matrix containing 70 taxa and 408 characters place A. yanensis as the most basal eutherian in the selected group. The morphological differences between Acristatherium and Eomaia indicate that eutherians already had a significant degree of generic diversification ca 125 Ma.
关键词	Early Cretaceous Mammal Eutherian Jehol Biota Septomaxilla Therian Dentition
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
URL	查看原文
关键词[WOS]	SKULL ; EVOLUTION ; MONGOLIA ; SEPTOMAXILLA ; UZBEKISTAN ; SYNAPSIDS ; DENTITION
收录类别	SCI
语种	英语
WOS研究方向	Life Sciences & Biomedicine - Other Topics ; Environmental Sciences & Ecology ; Evolutionary Biology
WOS类目	Biology ; Ecology ; Evolutionary Biology
WOS记录号	WOS:000272467300009
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/4615
专题	中科院古脊椎所（2000年以后）古低等脊椎动物研究室古哺乳动物研究室
通讯作者	jmeng@amnh.org
作者单位	1.Amer Museum Nat Hist, New York, NY 10024 USA 2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Evolutionary Systemat Vertebrates, Beijing 100044, Peoples R China
推荐引用方式 GB/T 7714	Hu, Yaoming,Meng, Jin,Li, Chuankui,et al. New basal eutherian mammal from the Early Cretaceous Jehol biota, Liaoning, China[J]. PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES,2010,277(1679):229-236.
APA	Hu, Yaoming,Meng, Jin,Li, Chuankui,Wang, Yuanqing,&jmeng@amnh.org.(2010).New basal eutherian mammal from the Early Cretaceous Jehol biota, Liaoning, China.PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES,277(1679),229-236.
MLA	Hu, Yaoming,et al."New basal eutherian mammal from the Early Cretaceous Jehol biota, Liaoning, China".PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES 277.1679(2010):229-236.

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