Two New Mylagaulid Rodents from the Early Miocene of China

doi:10.1371/journal.pone.0159445

IVPP-IR > 中科院古脊椎所（2000年以后）

	Two New Mylagaulid Rodents from the Early Miocene of China
	Lu, Xiaoyu 1; Ni, Xijun 1,2; Li, Luzhou 1; Li, Qiang 1,2
	2016-08-03
发表期刊	PLOS ONE
卷号	11 期号:8
文章类型	Article
摘要	Mylagaulid fossorial rodents are a common component of North American Miocene fossil faunas. However outside of North America, only three species are known from Asia. Here we report two new mylagaulids, Irtyshogaulus minor gen. et sp. nov. and Irtyshogaulus major gen. et sp. nov., recovered from early Miocene sediments in the Junggar Basin in northwestern China. The two new taxa are small-sized, high-crowned promylagauline rodents. Their lower molars possess high metastylid crests, small mesostylids, broad and posterolingually expanded labial inflections, and transversely extending metalophid IIs. The mesoconid is absent in both species. The anterior and posterior fossettids are large and equally developed. Their upper M1-2s possess a square occlusal surface with five deep fossettes. The two new taxa are distinguished from each other mainly by their size, the morphology of fossettes and fossettids, development of mesial and distal lophs, posterior reduction of M3, and the orientation of m2 hypolophid. Our phylogenetic analysis indicates that Irtyshogaulus and Lamugaulus (another early Miocene Asian mylagaulid) are sister taxa. The two genera are nested among the North American promylagaulines, and share a common ancestor from North America, indicating early Miocene intercontinental dispersal within this clade of rodents.
WOS标题词	Science & Technology
DOI	10.1371/journal.pone.0159445
关键词[WOS]	MAMMALIA ; EVOLUTION
收录类别	SCI
语种	英语
项目资助者	Strategic Priority Research Program of Chinese Academy of Sciences (CAS)(XDB03020000) ; National Basic Research Program of China(2012CB821904) ; CAS 100-talent Program ; National Natural Science Foundation of China(41472025)
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000381367800030
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/7031
专题	中科院古脊椎所（2000年以后）
作者单位	1.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Inst Vertebrate Paleontol & Paleoanthropol, 142 Xi Zhi Men Wai, Beijing 100044, Peoples R China 2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Lu, Xiaoyu,Ni, Xijun,Li, Luzhou,et al. Two New Mylagaulid Rodents from the Early Miocene of China[J]. PLOS ONE,2016,11(8).
APA	Lu, Xiaoyu,Ni, Xijun,Li, Luzhou,&Li, Qiang.(2016).Two New Mylagaulid Rodents from the Early Miocene of China.PLOS ONE,11(8).
MLA	Lu, Xiaoyu,et al."Two New Mylagaulid Rodents from the Early Miocene of China".PLOS ONE 11.8(2016).