The Crocodylomorpha at and between geological boundaries: the Baden-Powell approach to change?

IVPP-IR > 中科院古脊椎所（2000年以后）

	The Crocodylomorpha at and between geological boundaries: the Baden-Powell approach to change?
	Russell, AP ; Wu, XC; Russell, AP (reprint author), Univ Calgary, Dept Biol Sci, Vertebrate Morphol Res Grp, 2500 Univ Dr NW, Calgary, AB T2N 1N4, Canada.
	1997
发表期刊	ZOOLOGY-ANALYSIS OF COMPLEX SYSTEMS
ISSN	0944-2006
卷号	100 期号:3 页码:164-182
文章类型	Article
摘要	Although the Crocodylomorpha spans a time period of over 200 million years, none of its notable morphological transitions appear 'to coincide with major geological boundaries. The Crocodylomorpha originated before the extinction event at the end of the Carnian Stage (Late Triassic), concomitant with a shift of locomotor pattern from bipedal erect posture to quadrupedal erect posture. With the successive divergence of the Sphenosuchia and Protosuchia the majority of features of the extant Crocodylia became established before the end of the Triassic. The Mesoeucrocodylia may have arisen in the early part of the Early Jurassic. The adoption of a more sprawling posture in the Longirostrine Taxa of the Mesoeucrocodylia was associated with a change of way of life from terrestrial to aquatic, probably immediately after the extinction event at the end of the Pliensbachian Stage (Jurassic). The Eusuchia arose in the Early Cretaceous, being characterized mainly by a complete bony secondary palate and the procoely of all vertebrae. The three extant clades most probably all arose before the Cretaceous-Tertiary boundary. Thus, the patterns of cladogenesis and diversification within the Crocodylomorpha indicate that, at least as currently understood, these taxa were prepared for the major environmental and biotic events that occurred during their history. Baden-Powell's motto of "be prepared" (Maynard 1946), taken from his own initials, appears to be an adequate descriptor of the history of the Crocodylomorpha,; Although the Crocodylomorpha spans a time period of over 200 million years, none of its notable morphological transitions appear 'to coincide with major geological boundaries. The Crocodylomorpha originated before the extinction event at the end of the Carnian Stage (Late Triassic), concomitant with a shift of locomotor pattern from bipedal erect posture to quadrupedal erect posture. With the successive divergence of the Sphenosuchia and Protosuchia the majority of features of the extant Crocodylia became established before the end of the Triassic. The Mesoeucrocodylia may have arisen in the early part of the Early Jurassic. The adoption of a more sprawling posture in the Longirostrine Taxa of the Mesoeucrocodylia was associated with a change of way of life from terrestrial to aquatic, probably immediately after the extinction event at the end of the Pliensbachian Stage (Jurassic). The Eusuchia arose in the Early Cretaceous, being characterized mainly by a complete bony secondary palate and the procoely of all vertebrae. The three extant clades most probably all arose before the Cretaceous-Tertiary boundary. Thus, the patterns of cladogenesis and diversification within the Crocodylomorpha indicate that, at least as currently understood, these taxa were prepared for the major environmental and biotic events that occurred during their history. Baden-Powell's motto of "be prepared" (Maynard 1946), taken from his own initials, appears to be an adequate descriptor of the history of the Crocodylomorpha,
关键词	Origin Evolution Extinction
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
关键词[WOS]	REPUBLIC-OF-CHINA ; REPTILE ; CROCODYLIFORMES ; ARCHOSAURIA ; REVISION ; ORIGIN ; YOUNG
收录类别	SCI ; ISTP
语种	英语
WOS研究方向	Zoology
WOS类目	Zoology
WOS记录号	WOS:000072515100005
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/4035
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	Russell, AP (reprint author), Univ Calgary, Dept Biol Sci, Vertebrate Morphol Res Grp, 2500 Univ Dr NW, Calgary, AB T2N 1N4, Canada.
作者单位	1.Univ Calgary, Dept Biol Sci, Vertebrate Morphol Res Grp, Calgary, AB T2N 1N4, Canada 2.Acad Sinica, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China
推荐引用方式 GB/T 7714	Russell, AP,Wu, XC,Russell, AP . The Crocodylomorpha at and between geological boundaries: the Baden-Powell approach to change?[J]. ZOOLOGY-ANALYSIS OF COMPLEX SYSTEMS,1997,100(3):164-182.
APA	Russell, AP,Wu, XC,&Russell, AP .(1997).The Crocodylomorpha at and between geological boundaries: the Baden-Powell approach to change?.ZOOLOGY-ANALYSIS OF COMPLEX SYSTEMS,100(3),164-182.
MLA	Russell, AP,et al."The Crocodylomorpha at and between geological boundaries: the Baden-Powell approach to change?".ZOOLOGY-ANALYSIS OF COMPLEX SYSTEMS 100.3(1997):164-182.