A stem batrachian from the Early Permian of Texas and the origin of frogs and salamanders

被引：0
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作者：
Jason S. Anderson
Robert R. Reisz
Diane Scott
Nadia B. Fröbisch
Stuart S. Sumida
机构：
[1] Faculty of Veterinary Medicine,Department of Comparative Biology and Experimental Medicine
[2] University of Calgary,Department of Biology
[3] 3330 Hospital Drive,Department of Biology
[4] Calgary,undefined
[5] Alberta T2N 4N1,undefined
[6] Canada,undefined
[7] University of Toronto at Mississauga,undefined
[8] 3359 Mississauga Road,undefined
[9] Mississauga,undefined
[10] Ontario L5L 1C6,undefined
[11] Canada,undefined
[12] Redpath Museum,undefined
[13] McGill University,undefined
[14] 859 Sherbrooke Street West,undefined
[15] Montréal,undefined
[16] Québec H3A 2K6,undefined
[17] Canada ,undefined
[18] California State University at San Bernardino,undefined
[19] 5500 University Parkway,undefined
[20] San Bernardino,undefined
[21] California 92407-2307,undefined
[22] USA,undefined
来源：
Nature | 2008年 / 453卷
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摘要：
The origin of the amphibians (frogs, salamanders and caecilians) is one of the most controversial questions in vertebrate evolution, because of the large morphological and temporal gaps between today's amphibians and the extinct fossil forms. The discovery of an unusually complete Palaeozoic amphibian from the Early Permian of Texas has now helped to fill that gap. The new fossil has the overall appearance of a temnospondyl — an archaic amphibian — but boasts many characteristic features seen in modern frogs, toads and salamanders. A phylogenetic analysis splits the modern amphibia into two groups, separating at some time before 330 million years ago, with frogs, toads and salamanders related to temnospondyls, and caecilians more closely related to the lepospondyls, another group of archaic amphibians.
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页码：515 / 518
页数：3
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