A primitive fish close to the common ancestor of tetrapods and lungfish

IVPP-IR > 中科院古脊椎所（2000年以后）

	A primitive fish close to the common ancestor of tetrapods and lungfish
	Zhu, M; Yu, XB ; Zhu, M (reprint author), Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, POB 643, Beijing 100044, Peoples R China.
	2002-08-15
发表期刊	NATURE
ISSN	0028-0836
卷号	418 期号:6899 页码:767-770
文章类型	Article
摘要	The relationship of the three living groups of sarcopterygians or lobe-finned fish (tetrapods, lungfish and coelacanths) has been a matter of debate(1-5). Although opinions still differ, most recent phylogenies suggest that tetrapods are more closely related to lungfish than to coelacanths(6-10). However, no previously known fossil taxon exhibits a concrete character combination approximating the condition expected in the last common ancestor of tetrapods and lungfish-and it is still poorly understood how early sarcopterygians diverged into the tetrapod lineage (Tetrapodomorpha)(7) and the lungfish lineage (Dipnomorpha)(7). Here we describe a fossil sarcopterygian fish, Styloichthys changae gen. et sp. nov., that possesses an eyestalk and which exhibits the character combination expected in a stem group close to the last common ancestor of tetrapods and lungfish. Styloichthys from the Lower Devonian of China bridges the morphological gap between stem-group sarcopterygians (Psarolepis and Achoania)(10) and basal tetrapodomorphs/basal dipnomorphs. It provides information that will help in the study of the relationship of early sarcopterygians, and which will also help to resolve the tetrapod-lungfish divergence into a documented sequence of character acquisition.; The relationship of the three living groups of sarcopterygians or lobe-finned fish (tetrapods, lungfish and coelacanths) has been a matter of debate(1-5). Although opinions still differ, most recent phylogenies suggest that tetrapods are more closely related to lungfish than to coelacanths(6-10). However, no previously known fossil taxon exhibits a concrete character combination approximating the condition expected in the last common ancestor of tetrapods and lungfish-and it is still poorly understood how early sarcopterygians diverged into the tetrapod lineage (Tetrapodomorpha)(7) and the lungfish lineage (Dipnomorpha)(7). Here we describe a fossil sarcopterygian fish, Styloichthys changae gen. et sp. nov., that possesses an eyestalk and which exhibits the character combination expected in a stem group close to the last common ancestor of tetrapods and lungfish. Styloichthys from the Lower Devonian of China bridges the morphological gap between stem-group sarcopterygians (Psarolepis and Achoania)(10) and basal tetrapodomorphs/basal dipnomorphs. It provides information that will help in the study of the relationship of early sarcopterygians, and which will also help to resolve the tetrapod-lungfish divergence into a documented sequence of character acquisition.
WOS标题词	Science & Technology
URL	查看原文
关键词[WOS]	PSAROLEPIS ; AUSTRALIA
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:000177428000036
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/3779
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	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.Kean Univ, Dept Biol Sci, Union, NJ 07083 USA
推荐引用方式 GB/T 7714	Zhu, M,Yu, XB,Zhu, M . A primitive fish close to the common ancestor of tetrapods and lungfish[J]. NATURE,2002,418(6899):767-770.
APA	Zhu, M,Yu, XB,&Zhu, M .(2002).A primitive fish close to the common ancestor of tetrapods and lungfish.NATURE,418(6899),767-770.
MLA	Zhu, M,et al."A primitive fish close to the common ancestor of tetrapods and lungfish".NATURE 418.6899(2002):767-770.

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