Jeholotriton Paradoxus (Amphibia : Caudata) from the Lower Cretaceous of southeastern Inner Mongolia, China

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	Jeholotriton Paradoxus (Amphibia : Caudata) from the Lower Cretaceous of southeastern Inner Mongolia, China
	Wang, Y ; Rose, CS ; Wang, Y (reprint author), Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, POB 643, Beijing 100044, Peoples R China.
刊名	JOURNAL OF VERTEBRATE PALEONTOLOGY
	2005-09-30
卷号	25 期号:3 页码:523-532
ISSN号	0272-4634
文献子类	Article
英文摘要	A fossil salamander is described based on specimens from a Lower Cretaceous deposit near Ningcheng, Inner Mongolia, China. Recently reported as Jeholotriton paradoxits, this form represents a neotenic salamander as indicated by larval features such as external gills, tooth-bearing coronoids, pterygoids with anteromedially oriented anterior processes, and underdeveloped maxillae, in combination with adult features such as extensive medial contact of the nasals and posteriorly directed tooth rows in the palate. This taxon is distinguished from other Mesozoic salamanders by having 15-16 presacrals, proximally expanded unicapitate ribs, vomers with large tooth patches anteriorly and longitudinal dentigerous bars posteriorly, large nasals with no anterior notch, frontals with no anterolateral extension, premaxillae with distinct alary processes, short transverse processes on the vertebrae, and phalangeal formulae of 2-2-3-2 for the mantis and 2-2-3-3-2 for the pes. Including Laccotriton, Liaoxitriton, Sinerpeton and Chunerpeton, five taxa of Mesozoic salamander have now been found in China. Jeholotriton has especially well-preserved impressions of articulated skeletons, a type of preservation that is uncommon in Mesozoic strata throughout the world and provides important anatomical details of this early salamander. The great diversity of fossil salamanders from the late Mesozoic of northeastern China implies that East Asia was an important center for the early evolution of urodeles.; A fossil salamander is described based on specimens from a Lower Cretaceous deposit near Ningcheng, Inner Mongolia, China. Recently reported as Jeholotriton paradoxits, this form represents a neotenic salamander as indicated by larval features such as external gills, tooth-bearing coronoids, pterygoids with anteromedially oriented anterior processes, and underdeveloped maxillae, in combination with adult features such as extensive medial contact of the nasals and posteriorly directed tooth rows in the palate. This taxon is distinguished from other Mesozoic salamanders by having 15-16 presacrals, proximally expanded unicapitate ribs, vomers with large tooth patches anteriorly and longitudinal dentigerous bars posteriorly, large nasals with no anterior notch, frontals with no anterolateral extension, premaxillae with distinct alary processes, short transverse processes on the vertebrae, and phalangeal formulae of 2-2-3-2 for the mantis and 2-2-3-3-2 for the pes. Including Laccotriton, Liaoxitriton, Sinerpeton and Chunerpeton, five taxa of Mesozoic salamander have now been found in China. Jeholotriton has especially well-preserved impressions of articulated skeletons, a type of preservation that is uncommon in Mesozoic strata throughout the world and provides important anatomical details of this early salamander. The great diversity of fossil salamanders from the late Mesozoic of northeastern China implies that East Asia was an important center for the early evolution of urodeles.
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WOS关键词	ALBANERPETONTID AMPHIBIANS ; LAS-HOYAS ; SALAMANDERS ; SPAIN ; RECONSIDERATION ; MORPHOLOGY ; AGE
WOS研究方向	Paleontology
语种	英语
WOS记录号	WOS:000232316700004
公开日期	2013-11-27
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/3512]
专题	古脊椎动物与古人类研究所_图书馆1
通讯作者	Wang, Y (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.James Madison Univ, Dept Biol, Harrisonburg, VA 22807 USA
推荐引用方式 GB/T 7714	Wang, Y,Rose, CS,Wang, Y . Jeholotriton Paradoxus (Amphibia : Caudata) from the Lower Cretaceous of southeastern Inner Mongolia, China[J]. JOURNAL OF VERTEBRATE PALEONTOLOGY,2005,25(3):523-532.
APA	Wang, Y,Rose, CS,&Wang, Y .(2005).Jeholotriton Paradoxus (Amphibia : Caudata) from the Lower Cretaceous of southeastern Inner Mongolia, China.JOURNAL OF VERTEBRATE PALEONTOLOGY,25(3),523-532.
MLA	Wang, Y,et al."Jeholotriton Paradoxus (Amphibia : Caudata) from the Lower Cretaceous of southeastern Inner Mongolia, China".JOURNAL OF VERTEBRATE PALEONTOLOGY 25.3(2005):523-532.