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.
	2007
发表期刊	AM MUS NOVIT
ISSN	0003-0082
期号	3571
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.
关键词	Early Eocene Primates Pakistan Differentiation Paleogene Altanius
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收录类别	SCI收录
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/4927
专题	中科院古脊椎所（2000年以后）
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]. AM MUS NOVIT,2007(3571).
APA	Ni, Xijun,Beard, K. Christopher,Meng, Jin,Wang, Yuanqing,&Gebo, Daniel L..(2007).Discovery of the first early cenozoic Euprimate (Mammalia) from Inner Mongolia.AM MUS NOVIT(3571).
MLA	Ni, Xijun,et al."Discovery of the first early cenozoic Euprimate (Mammalia) from Inner Mongolia".AM MUS NOVIT .3571(2007).

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