THE FIRST ASIAN PLESIADAPOIDS (MAMMALIA, PRIMATOMORPHA)

IVPP-IR > 中科院古脊椎所（2000年以后）

	THE FIRST ASIAN PLESIADAPOIDS (MAMMALIA, PRIMATOMORPHA)
	BEARD, KC; WANG, JW; BEARD, KC (reprint author), ACAD SINICA,INST VERTEBRATE PALEONTOL & PALEOANTHROPOL,VERTEBRATE PALEONTOL SECT,POB 643,BEIJING 100044,PEOPLES R CHINA.
	1995
发表期刊	ANNALS OF CARNEGIE MUSEUM
ISSN	0097-4463
卷号	64 期号:1 页码:1—33
摘要	Two new genera and species of carpolestid plesiadapoids are described from early Eocene coal beds of the Wutu Formation, Wutu Basin, Shandong Province, People's Republic China. Chronolestes simul, n. gen. and sp., possesses a reduced P-3 and hypertrophied P-4 as do all carpolestids, but contrasts with other members of this family in lacking a bladelike, polycuspidate P-4. P3-4 of Chronolestes are structurally simpler, and almost certainly more primitive, than those of any other plesiadapoid. Chronolestes is interpreted as the sister group of all other carpolestids and forms the basis for the new, monotypic subfamily Chronolestinae. Carpocristes oriens, n. gen. and sp., is a dentally derived carpolestine characterized by triple median crests on P3-4 and an S-shaped blade on P-4. The closely related North American species ''Carpodaptes'' hobackensis and ''Carpodaptes'' cygneus are transferred here to the new genus Carpocristes. Relationships among species of Carpocristes are reconstructed as (C. cygneus (C. hobackensis, C. oriens)). Potential dental synapomorphies for Plesiadapoidea, including Plesiadapidae, Saxonellidae, and Carpolestidae, are identified for the first time. Within Plesiadapoidea, available evidence weakly supports the monophyly of a Plesiadapidae + Saxonellidae clade. Altanius orlovi from the early Eocene of Mongolia is unlikely to be either a plesiadapoid or a basal carpolestid. The fossil record of North American and Asian Carpolestidae suggests at least two episodes of trans-Beringian dispersal for members of this clade during the Paleocene. The timing of these dispersal episodes is weakly constrained, but middle Torrejonian (Chronolestes dade) and latest Tiffanian or earliest Clarkforkian (Carpocristes clade) dispersal events conform with inferences regarding trans-Beringian dispersal of other groups of Paleocene mammals. The recent hypothesis that competitive exclusion by rodents may have been a causal factor underlying carpolestid extinction in North America is called into question by the co-occurrence of two carpolestids and ctenodactyloid, alagomyid, and paramyid rodents at Wutu, together with the high probability that both carpolestids and rodents coexisted in Asia through much of the Paleocene.
收录类别	SCI收录
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/4095
专题	中科院古脊椎所（2000年以后）
通讯作者	BEARD, KC (reprint author), ACAD SINICA,INST VERTEBRATE PALEONTOL & PALEOANTHROPOL,VERTEBRATE PALEONTOL SECT,POB 643,BEIJING 100044,PEOPLES R CHINA.
推荐引用方式 GB/T 7714	BEARD, KC,WANG, JW,BEARD, KC . THE FIRST ASIAN PLESIADAPOIDS (MAMMALIA, PRIMATOMORPHA)[J]. ANNALS OF CARNEGIE MUSEUM,1995,64(1):1—33.
APA	BEARD, KC,WANG, JW,&BEARD, KC .(1995).THE FIRST ASIAN PLESIADAPOIDS (MAMMALIA, PRIMATOMORPHA).ANNALS OF CARNEGIE MUSEUM,64(1),1—33.
MLA	BEARD, KC,et al."THE FIRST ASIAN PLESIADAPOIDS (MAMMALIA, PRIMATOMORPHA)".ANNALS OF CARNEGIE MUSEUM 64.1(1995):1—33.