IGUANIANS FROM THE UPPER CRETACEOUS DJADOCHTA FORMATION, GOBI DESERT, CHINA

IVPP-IR > 中科院古脊椎所（2000年以后）

	IGUANIANS FROM THE UPPER CRETACEOUS DJADOCHTA FORMATION, GOBI DESERT, CHINA
	GAO, KQ; HOU, LH
	1995-03-14
发表期刊	JOURNAL OF VERTEBRATE PALEONTOLOGY
ISSN	0272-4634
卷号	15 期号:1 页码:57-78
文章类型	Article
摘要	Newly discovered lizard fossils from the Upper Cretaceous Djadochta Formation in the Gobi Desert of Inner Mongolia China, include early iguanids and agamids that are taxonomically and biogeographically important. Two iguanids reported here, Anchaurosaurus gilmorei, gen. et sp. nov. and Xihaina aquilonia, gen. et sp. nov.. document the geologically earliest record of the family from Asia, and extend the fossil record of the group by 11-13 Myr. The geological age and primitive structure of these Cretaceous iguanids, coupled with other material of the same group from the slightly younger Barun Goyot Formation, suggest that the group had a long evolutionary history on ?he northern continents, and hence, challenge the widely accepted South American origin hypothesis of the Iguanidae (sensu late). Three taxa of agamids are documented in the new collection: Mimeosaurus crassus Gilmore, 1943, Priscagama gobiensis Borsuk-Bialynicka and Moody, 1984, and Pleurodontagama aenigmatodes Borsuk-Bialynicka and Moody, 1984. Several well-preserved skulls of M. crassus show a structure that requires a taxonomic revision of this genus. Priscagama and Pleurodontagama are poorly documented. It has been long held that the iguanids and agamids have different centers of origin, and that the two groups have been separated geographically from one another since the beginning of their evolution. With the discoveries of new iguanids and agamids together from the Gobi, it is now dear that the two families were sympatric during their early evolution on the northern continents.; Newly discovered lizard fossils from the Upper Cretaceous Djadochta Formation in the Gobi Desert of Inner Mongolia China, include early iguanids and agamids that are taxonomically and biogeographically important. Two iguanids reported here, Anchaurosaurus gilmorei, gen. et sp. nov. and Xihaina aquilonia, gen. et sp. nov.. document the geologically earliest record of the family from Asia, and extend the fossil record of the group by 11-13 Myr. The geological age and primitive structure of these Cretaceous iguanids, coupled with other material of the same group from the slightly younger Barun Goyot Formation, suggest that the group had a long evolutionary history on ?he northern continents, and hence, challenge the widely accepted South American origin hypothesis of the Iguanidae (sensu late). Three taxa of agamids are documented in the new collection: Mimeosaurus crassus Gilmore, 1943, Priscagama gobiensis Borsuk-Bialynicka and Moody, 1984, and Pleurodontagama aenigmatodes Borsuk-Bialynicka and Moody, 1984. Several well-preserved skulls of M. crassus show a structure that requires a taxonomic revision of this genus. Priscagama and Pleurodontagama are poorly documented. It has been long held that the iguanids and agamids have different centers of origin, and that the two groups have been separated geographically from one another since the beginning of their evolution. With the discoveries of new iguanids and agamids together from the Gobi, it is now dear that the two families were sympatric during their early evolution on the northern continents.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
收录类别	SCI
语种	英语
WOS研究方向	Paleontology
WOS类目	Paleontology
WOS记录号	WOS:A1995RK12000005
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/4091
专题	中科院古脊椎所（2000年以后）
作者单位	ACAD SINICA, INST VERTEBRATE PALEONTOL & PALEOANTHROPOL, BEIJING, PEOPLES R CHINA
推荐引用方式 GB/T 7714	GAO, KQ,HOU, LH. IGUANIANS FROM THE UPPER CRETACEOUS DJADOCHTA FORMATION, GOBI DESERT, CHINA[J]. JOURNAL OF VERTEBRATE PALEONTOLOGY,1995,15(1):57-78.
APA	GAO, KQ,&HOU, LH.(1995).IGUANIANS FROM THE UPPER CRETACEOUS DJADOCHTA FORMATION, GOBI DESERT, CHINA.JOURNAL OF VERTEBRATE PALEONTOLOGY,15(1),57-78.
MLA	GAO, KQ,et al."IGUANIANS FROM THE UPPER CRETACEOUS DJADOCHTA FORMATION, GOBI DESERT, CHINA".JOURNAL OF VERTEBRATE PALEONTOLOGY 15.1(1995):57-78.

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