New triconodontids (Mammalia) from the Lower Cretaceous Shahai and Fuxin formations, northeastern China

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	New triconodontids (Mammalia) from the Lower Cretaceous Shahai and Fuxin formations, northeastern China
	Kusuhashi, Nao 1,2; Hu, Yaoming 1; Wang, Yuanqing1 ; Hirasawa, Satoshi 2; Matsuoka, Hiroshige 2; [email protected]
	2009-11-01
发表期刊	GEOBIOS
ISSN	0016-6995
卷号	42 期号:6 页码:765-781
文章类型	Review
摘要	The first triconodontids from Asia have been discovered from the Lower Cretaceous (Aptian to Albian) Shahai and Fuxin formations in Liaoning Province, northeastern China: Meiconodon lii gen. and sp. nov. and M. setoguchii gen. and sp. nov. M. lii is characterized by molariform teeth with a developed cusp d, an m3 with taller cusp a, an m4 with three primary cusps of subequal height, the posteriorly decreasing transverse width of the m4, and a considerably reduced m5. M. seloguchii is slightly larger than M. lii, and characterized by a sharp labial cingulum on the m4, and a less developed cusp d on the molariform teeth than M. lii. The extensive interlocking system between molariforms, posteriorly recumbent primary molariform cusps, and their great degree of asymmetry in occlusal view with rounded labial faces and more angulate lingual faces in lateral view, indicate that Meiconodon belongs to the triconodontid subfamily Alticonodontinae. These new taxa are the first record of Triconodontidae from Asia, and of Alticonodontinae outside North America, suggesting the occurrence of mammalian faunal exchange between North America and Asia during or before the Aptian-Albian. (C) 2009 Elsevier Masson SAS. All fights reserved.
关键词	Triconodontidae Alticonodontinae Meiconodon Gen. Nov. Early Cretaceous Northeastern China
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
URL	查看原文
关键词[WOS]	DINOSAUR-BEARING SEDIMENTS ; FORMATION TETORI GROUP ; MULTITUBERCULATE MAMMALS ; SIHETUN VERTEBRATE ; MESOZOIC MAMMALS ; CENTRAL-ASIA ; LOWER JAW ; MONGOLIA ; AGE ; EVOLUTION
收录类别	SCI
语种	英语
WOS研究方向	Paleontology
WOS类目	Paleontology
WOS记录号	WOS:000273041800007
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/4701
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	[email protected]
作者单位	1.Chinese Acad Sci, Lab Evolutionary Systemat Vertebrates, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 2.Kyoto Univ, Dept Geol & Mineral, Grad Sch Sci, Kyoto 6068502, Japan
推荐引用方式 GB/T 7714	Kusuhashi, Nao,Hu, Yaoming,Wang, Yuanqing,et al. New triconodontids (Mammalia) from the Lower Cretaceous Shahai and Fuxin formations, northeastern China[J]. GEOBIOS,2009,42(6):765-781.
APA	Kusuhashi, Nao,Hu, Yaoming,Wang, Yuanqing,Hirasawa, Satoshi,Matsuoka, Hiroshige,[email protected].(2009).New triconodontids (Mammalia) from the Lower Cretaceous Shahai and Fuxin formations, northeastern China.GEOBIOS,42(6),765-781.
MLA	Kusuhashi, Nao,et al."New triconodontids (Mammalia) from the Lower Cretaceous Shahai and Fuxin formations, northeastern China".GEOBIOS 42.6(2009):765-781.

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