Sinobaatar gen. nov.: First multituberculate from the Jehol Biota of Liaoning, Northeast China

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	Sinobaatar gen. nov.: First multituberculate from the Jehol Biota of Liaoning, Northeast China
	Hu, YM ; Wang, YQ; Hu, YM (reprint author), Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 10044, Peoples R China.
	2002-06-01
发表期刊	CHINESE SCIENCE BULLETIN
ISSN	1001-6538
卷号	47 期号:11 页码:933-+
文章类型	Article
摘要	A multituberculate skeleton from the Lower Cretaceous Yixian Formation at Dawangzhangzi, Lingyuan City, Liaoning Province, Northeast China, provides new morphological information for early multituberculates. The specimen is the holotype of Sinobaatar lingyuanensis gen. et sp. nov. It has a narrow skull that lacks the superorbital crest or postorbital process. The dental formula is 3.?.5.2/1.0.3.2. The dental morphology, especially that of cheek teeth, of S. lingyuanensis is similar to that of Eobaatar, which places it in the family Eobaataridae. The postcranial skeleton of Sinobaatar is similar to that of other multituberculates. As in Holotheria, Metatarsal V of Sinobaatar articulates only with the cuboid and has no contact with the calcaneus, which probably represents the primitive condition of multituberculates. Nine carpals of Sinobaatar resemble those of Zhang-heotherium, except the centrale being larger than the trapezoid. The dental features of Sinobaatar show again that eobaatarids are obviously intermediate between Late Jurassic multituberculates and the later forms. Because eobaatarids are only known from the Early Cretaceous, the finding of Sinobaatar, therefore, supports that the age of the Jehol Biota is most likely Early Cretaceous.; A multituberculate skeleton from the Lower Cretaceous Yixian Formation at Dawangzhangzi, Lingyuan City, Liaoning Province, Northeast China, provides new morphological information for early multituberculates. The specimen is the holotype of Sinobaatar lingyuanensis gen. et sp. nov. It has a narrow skull that lacks the superorbital crest or postorbital process. The dental formula is 3.?.5.2/1.0.3.2. The dental morphology, especially that of cheek teeth, of S. lingyuanensis is similar to that of Eobaatar, which places it in the family Eobaataridae. The postcranial skeleton of Sinobaatar is similar to that of other multituberculates. As in Holotheria, Metatarsal V of Sinobaatar articulates only with the cuboid and has no contact with the calcaneus, which probably represents the primitive condition of multituberculates. Nine carpals of Sinobaatar resemble those of Zhang-heotherium, except the centrale being larger than the trapezoid. The dental features of Sinobaatar show again that eobaatarids are obviously intermediate between Late Jurassic multituberculates and the later forms. Because eobaatarids are only known from the Early Cretaceous, the finding of Sinobaatar, therefore, supports that the age of the Jehol Biota is most likely Early Cretaceous.
关键词	Lingyuan Western Liaoning Yixian Formation Early Cretaceous Jehol Biota Multituberculates Sinobaatar
WOS标题词	Science & Technology
URL	查看原文
关键词[WOS]	SIHETUN VERTEBRATE ; MAMMALS ; AGE
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:000175600200013
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/3791
专题	中科院古脊椎所（2000年以后）古低等脊椎动物研究室
通讯作者	Hu, YM (reprint author), Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 10044, Peoples R China.
作者单位	1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 10044, Peoples R China 2.Amer Museum Nat Hist, New York, NY 10024 USA 3.CUNY, Grad Sch, Biol Program, New York, NY 10016 USA 4.CUNY, City Coll, Biol Program, New York, NY 10016 USA
推荐引用方式 GB/T 7714	Hu, YM,Wang, YQ,Hu, YM . Sinobaatar gen. nov.: First multituberculate from the Jehol Biota of Liaoning, Northeast China[J]. CHINESE SCIENCE BULLETIN,2002,47(11):933-+.
APA	Hu, YM,Wang, YQ,&Hu, YM .(2002).Sinobaatar gen. nov.: First multituberculate from the Jehol Biota of Liaoning, Northeast China.CHINESE SCIENCE BULLETIN,47(11),933-+.
MLA	Hu, YM,et al."Sinobaatar gen. nov.: First multituberculate from the Jehol Biota of Liaoning, Northeast China".CHINESE SCIENCE BULLETIN 47.11(2002):933-+.

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