Discovery of the first early cenozoic Euprimate (Mammalia) from Inner Mongolia

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	Discovery of the first early cenozoic Euprimate (Mammalia) from Inner Mongolia
	Ni, Xijun ; Beard, K. Christopher ; Meng, Jin ; Wang, Yuanqing ; Gebo, Daniel L.; Ni, XJ (reprint author), Chinese Acad Sci, Inst Vertebrate Paleontol & Paleonanthropol, Beijing 100044, Peoples R China.
	2007-05-16
发表期刊	AMERICAN MUSEUM NOVITATES
ISSN	0003-0082
期号	3571 页码:1-11
文章类型	Article
摘要	Although it is widely thought that euprimates originated in Asia, the fossil record of early euprimates remains sparse there. We describe herein a new omomyid euprimate, Baataromomys ulaanus, n. gen. et sp., based on an isolated right lower m2 from Bumbanian strata at Wulanboerhe in the Erlian Basin of Inner Mongolia, China. In terms of the size and proportions of m2, Bawaromomys ulaanus is intermediate between Eurasian and North American species that are usually assigned to Teilhardina. Morphologically, m2 of Bawaromomys differs from that of Teilhardina and North American small-bodied omomyids (including Anemorhysis, Tetonoides, Trogolemur, and Sphacorhysis) in having a smaller paraconid that is less fully connate with the metaconid, a lower entoconid, a weaker crest connecting the metaconid with the entoconid, and a weaker buccal cingulid. The new taxon is much smaller and lower crowned than Steinius, a genus commonly regarded as a basal omomyid. Despite the substantial difference in size, the m2s of Bawaromomys and Steinius share some important features, including a very broad talonid basin and a relatively low hypoconid and cristid obliqua. Given its early occurrence and primitive anatomy, Bawaromomys may eventually help to clarify the phylogenetic relationships among basal omomyids, but more complete specimens will be required to test this possibility. Bawaromomys brandti from the basal Wasatchian zone Wa-0 in the northern Bighorn Basin, Wyoming, was previously allocated to Telihardina. However, several dental features shared by R brandti and B. ulaanus suggest that they are closely related. The co-occurrence of Bawaromomys in Asia and North America indicates that small-bodied euprimates were able to dispersal across the Beringian region near the Paleocene-Eocene boundary.; Although it is widely thought that euprimates originated in Asia, the fossil record of early euprimates remains sparse there. We describe herein a new omomyid euprimate, Baataromomys ulaanus, n. gen. et sp., based on an isolated right lower m2 from Bumbanian strata at Wulanboerhe in the Erlian Basin of Inner Mongolia, China. In terms of the size and proportions of m2, Bawaromomys ulaanus is intermediate between Eurasian and North American species that are usually assigned to Teilhardina. Morphologically, m2 of Bawaromomys differs from that of Teilhardina and North American small-bodied omomyids (including Anemorhysis, Tetonoides, Trogolemur, and Sphacorhysis) in having a smaller paraconid that is less fully connate with the metaconid, a lower entoconid, a weaker crest connecting the metaconid with the entoconid, and a weaker buccal cingulid. The new taxon is much smaller and lower crowned than Steinius, a genus commonly regarded as a basal omomyid. Despite the substantial difference in size, the m2s of Bawaromomys and Steinius share some important features, including a very broad talonid basin and a relatively low hypoconid and cristid obliqua. Given its early occurrence and primitive anatomy, Bawaromomys may eventually help to clarify the phylogenetic relationships among basal omomyids, but more complete specimens will be required to test this possibility. Bawaromomys brandti from the basal Wasatchian zone Wa-0 in the northern Bighorn Basin, Wyoming, was previously allocated to Telihardina. However, several dental features shared by R brandti and B. ulaanus suggest that they are closely related. The co-occurrence of Bawaromomys in Asia and North America indicates that small-bodied euprimates were able to dispersal across the Beringian region near the Paleocene-Eocene boundary.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
URL	查看原文
关键词[WOS]	EARLY EOCENE ; PRIMATES ; PAKISTAN ; DIFFERENTIATION ; PALEOGENE ; ALTANIUS
收录类别	SCI
语种	英语
WOS研究方向	Biodiversity & Conservation ; Zoology
WOS类目	Biodiversity Conservation ; Zoology
WOS记录号	WOS:000246685500001
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/3361
专题	中科院古脊椎所（2000年以后）
通讯作者	Ni, XJ (reprint author), Chinese Acad Sci, Inst Vertebrate Paleontol & Paleonanthropol, Beijing 100044, Peoples R China.
作者单位	1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleonanthropol, Beijing 100044, Peoples R China 2.Amer Museum Nat Hist, Div Paleontol, New York, NY 10024 USA 3.Carnegie Museum Nat Hist, Sect Vertebrate Paleontol, Pittsburgh, PA 15213 USA 4.No Illinois Univ, Dept Anthropol, De Kalb, IL 60115 USA
推荐引用方式 GB/T 7714	Ni, Xijun,Beard, K. Christopher,Meng, Jin,et al. Discovery of the first early cenozoic Euprimate (Mammalia) from Inner Mongolia[J]. AMERICAN MUSEUM NOVITATES,2007(3571):1-11.
APA	Ni, Xijun,Beard, K. Christopher,Meng, Jin,Wang, Yuanqing,Gebo, Daniel L.,&Ni, XJ .(2007).Discovery of the first early cenozoic Euprimate (Mammalia) from Inner Mongolia.AMERICAN MUSEUM NOVITATES(3571),1-11.
MLA	Ni, Xijun,et al."Discovery of the first early cenozoic Euprimate (Mammalia) from Inner Mongolia".AMERICAN MUSEUM NOVITATES .3571(2007):1-11.

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