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

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	The Crocodylomorpha at and between geological boundaries: the Baden-Powell approach to change?
	Wu, XC
刊名	ZOOLOGY-ANALYSIS OF COMPLEX SYSTEMS
	1997
卷号	100 期号:3 页码:164—182
ISSN号	0944-2006
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.
中文摘要	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,
收录类别	SCI收录
公开日期	2013-11-27
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/4036]
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
推荐引用方式 GB/T 7714	Wu, XC. 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	Wu, XC.(1997).The Crocodylomorpha at and between geological boundaries: the Baden-Powell approach to change?.ZOOLOGY-ANALYSIS OF COMPLEX SYSTEMS,100(3),164—182.
MLA	Wu, XC."The Crocodylomorpha at and between geological boundaries: the Baden-Powell approach to change?".ZOOLOGY-ANALYSIS OF COMPLEX SYSTEMS 100.3(1997):164—182.