The origin of the internal nostril of tetrapods

IVPP-IR > 中科院古脊椎所（2000年以后）

	The origin of the internal nostril of tetrapods
	Zhu, M ; Ahlberg, PE ; Zhu, M (reprint author), Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, POB 643, Beijing 100044, Peoples R China.
	2004-11-04
发表期刊	NATURE
ISSN	0028-0836
卷号	432 期号:7013 页码:94-97
文章类型	Article
摘要	The choana, a unique 'internal nostril' opening from the nasal sac into the roof of the mouth, is a key part of the tetrapod ( land vertebrate) respiratory system. It was the first component of the tetrapod body plan to evolve, well before the origin of limbs, and is therefore crucial to our understanding of the beginning of the fish - tetrapod transition. However, there is no consensus on the origin of the choana despite decades of heated debate(1-9); some have claimed that it represents a palatally displaced external nostril(4,6), but others have argued that this is implausible because it implies breaking and rejoining the maxillary - premaxillary dental arcade and the maxillary branch of nerve V(2,6). The fossil record has not resolved the dispute, because the choana is fully developed in known tetrapod stem-group members(8,10,11). Here we present new material of Kenichthys, a 395-million-year-old fossil fish from China(12-14), that provides direct evidence for the origin of the choana and establishes its homology: it is indeed a displaced posterior external nostril that, during a brief transitional stage illustrated by Kenichthys, separated the maxilla from the premaxilla.; The choana, a unique 'internal nostril' opening from the nasal sac into the roof of the mouth, is a key part of the tetrapod ( land vertebrate) respiratory system. It was the first component of the tetrapod body plan to evolve, well before the origin of limbs, and is therefore crucial to our understanding of the beginning of the fish - tetrapod transition. However, there is no consensus on the origin of the choana despite decades of heated debate(1-9); some have claimed that it represents a palatally displaced external nostril(4,6), but others have argued that this is implausible because it implies breaking and rejoining the maxillary - premaxillary dental arcade and the maxillary branch of nerve V(2,6). The fossil record has not resolved the dispute, because the choana is fully developed in known tetrapod stem-group members(8,10,11). Here we present new material of Kenichthys, a 395-million-year-old fossil fish from China(12-14), that provides direct evidence for the origin of the choana and establishes its homology: it is indeed a displaced posterior external nostril that, during a brief transitional stage illustrated by Kenichthys, separated the maxilla from the premaxilla.
WOS标题词	Science & Technology
URL	查看原文
关键词[WOS]	POROLEPIFORMES
收录类别	SCI
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000224854900046
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/3597
专题	中科院古脊椎所（2000年以后）
通讯作者	Zhu, M (reprint author), Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, POB 643, Beijing 100044, Peoples R China.
作者单位	1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 2.Uppsala Univ, Evolutionary Biol Ctr, Dept Evolutionary Organismal Biol, SE-75236 Uppsala, Sweden
推荐引用方式 GB/T 7714	Zhu, M,Ahlberg, PE,Zhu, M . The origin of the internal nostril of tetrapods[J]. NATURE,2004,432(7013):94-97.
APA	Zhu, M,Ahlberg, PE,&Zhu, M .(2004).The origin of the internal nostril of tetrapods.NATURE,432(7013),94-97.
MLA	Zhu, M,et al."The origin of the internal nostril of tetrapods".NATURE 432.7013(2004):94-97.

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