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	MONOTREME AFFINITIES AND LOW-FREQUENCY HEARING SUGGESTED BY MULTITUBERCULATE EAR
	MENG, J; WYSS, AR; MENG, J (reprint author), AMER MUSEUM NAT HIST,DEPT VERTEBRATE PALEONTOL,CENT PK W 79TH ST,NEW YORK,NY 10024, USA.
刊名	NATURE
	1995-09-14
卷号	377期号:6545页码:141-144
ISSN号	0028-0836
文献子类	Article
英文摘要	MULTITUBERCULATES are an extinct, dentally distinctive group of Mesozoic/early Cenozoic mammals of uncertain affinities(1). We report here the discovery of a multituberculate ectotympanic bone, associated with the malleus in original life position, from two exquisitely preserved auditory regions, This documents, to our knowledge for the first time, incorporation of the angular and prearticular bones (jaw components in non-mammalian tetrapods) into the middle ear of multituberculates, favouring the hypothesized single origin of the ossicular chain in mammals(2,3). Morphology and orientation of these elements are strikingly similar to those of the extant egg-laying platypus and echidnas, suggesting a unique common ancestry of these forms(4), an affiliation once generally discredited(5-8) but regaining some recent support(9,10). The structure of these new multituberculate auditory ossicles, in conjuction with a greatly inflated vestibule and an uncoiled cochlea, implies an ear inefficient for reception of high-frequency airborne vibrations but well suited for bone-conducted hearing,; MULTITUBERCULATES are an extinct, dentally distinctive group of Mesozoic/early Cenozoic mammals of uncertain affinities(1). We report here the discovery of a multituberculate ectotympanic bone, associated with the malleus in original life position, from two exquisitely preserved auditory regions, This documents, to our knowledge for the first time, incorporation of the angular and prearticular bones (jaw components in non-mammalian tetrapods) into the middle ear of multituberculates, favouring the hypothesized single origin of the ossicular chain in mammals(2,3). Morphology and orientation of these elements are strikingly similar to those of the extant egg-laying platypus and echidnas, suggesting a unique common ancestry of these forms(4), an affiliation once generally discredited(5-8) but regaining some recent support(9,10). The structure of these new multituberculate auditory ossicles, in conjuction with a greatly inflated vestibule and an uncoiled cochlea, implies an ear inefficient for reception of high-frequency airborne vibrations but well suited for bone-conducted hearing,
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WOS关键词	MAMMALS
WOS研究方向	Science & Technology - Other Topics
语种	英语
WOS记录号	WOS:A1995RU75400045
公开日期	2013-11-27
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/4080]
专题	古脊椎动物与古人类研究所_图书馆1
通讯作者	MENG, J (reprint author), AMER MUSEUM NAT HIST,DEPT VERTEBRATE PALEONTOL,CENT PK W 79TH ST,NEW YORK,NY 10024, USA.
作者单位	1.INST VERTEBRATE PALEONTOL & PALEOANTHROPOL,BEIJING,PEOPLES R CHINA 2.UNIV CALIF SANTA BARBARA,DEPT GEOL SCI,SANTA BARBARA,CA 93106
推荐引用方式 GB/T 7714	MENG, J,WYSS, AR,MENG, J . MONOTREME AFFINITIES AND LOW-FREQUENCY HEARING SUGGESTED BY MULTITUBERCULATE EAR[J]. NATURE,1995,377(6545):141-144.
APA	MENG, J,WYSS, AR,&MENG, J .(1995).MONOTREME AFFINITIES AND LOW-FREQUENCY HEARING SUGGESTED BY MULTITUBERCULATE EAR.NATURE,377(6545),141-144.
MLA	MENG, J,et al."MONOTREME AFFINITIES AND LOW-FREQUENCY HEARING SUGGESTED BY MULTITUBERCULATE EAR".NATURE 377.6545(1995):141-144.

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