Transitional mammalian middle ear from a new Cretaceous Jehol eutriconodont

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	Transitional mammalian middle ear from a new Cretaceous Jehol eutriconodont
	Meng, Jin; Wang, Yuanqing(王元清); Li, Chuankui(李传夔); jmeng@amnh.org
刊名	NATURE
	2011
卷号	472 期号:7342 页码:181—185
关键词	Ossified Meckels Cartilage Evolutionary Development Origin Morganucodon Didelphidae
ISSN号	0028-0836
英文摘要	The transference of post-dentary jaw elements to the cranium of mammals as auditory ossicles is one of the central topics in evolutionary biology of vertebrates. Homologies of these bones among jawed vertebrates have long been demonstrated by developmental studies; but fossils illuminating this critical transference are sparse and often ambiguous. Here we report the first unambiguous ectotympanic (angular), malleus (articular and prearticular) and incus (quadrate) of an Early Cretaceous eutriconodont mammal from the Jehol Biota, Liaoning, China. The ectotympanic and malleus have lost their direct contact with the dentary bone but still connect the ossified Meckel's cartilage (OMC); we hypothesize that the OMC serves as a stabilizing mechanism bridging the dentary and the detached ossicles during mammalian evolution. This transitional mammalian middle ear narrows the morphological gap between the mandibular middle ear in basal mammaliaforms and the definitive mammalian middle ear (DMME) of extant mammals; it reveals complex changes contributing to the detachment of ear ossicles during mammalian evolution.
URL标识	查看原文
公开日期	2013-11-27
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/4424]
专题	古脊椎动物与古人类研究所_图书馆1 古脊椎动物与古人类研究所_古低等脊椎动物研究室古脊椎动物与古人类研究所_古哺乳动物研究室
通讯作者	jmeng@amnh.org
推荐引用方式 GB/T 7714	Meng, Jin,Wang, Yuanqing,Li, Chuankui,et al. Transitional mammalian middle ear from a new Cretaceous Jehol eutriconodont[J]. NATURE,2011,472(7342):181—185.
APA	Meng, Jin,Wang, Yuanqing,Li, Chuankui,&jmeng@amnh.org.(2011).Transitional mammalian middle ear from a new Cretaceous Jehol eutriconodont.NATURE,472(7342),181—185.
MLA	Meng, Jin,et al."Transitional mammalian middle ear from a new Cretaceous Jehol eutriconodont".NATURE 472.7342(2011):181—185.