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DOI	10.1073/pnas.2105956118
	An early Oligocene age for the oldest known monkeys and rodents of South America
	Campbell K.E.; Jr.; O’Sullivan P.B.; Fleagle J.G.; De Vries D.; Seiffert E.R.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:37
英文摘要	The Santa Rosa fossil locality in eastern Perú produced the first Paleogene vertebrate fauna from the Amazon Basin, including the oldest known monkeys from South America. This diverse paleofauna was originally assigned an Eocene age based largely on the stage of evolution of the site’s caviomorph rodents and marsupials. Here, we present detrital zircon dates that indicate that the maximum composite age of Santa Rosa is 29.6 ± 0.08 Ma (Lower Oligocene), although several zircons from Santa Rosa date to the Upper Oligocene. The first appearance datum for Caviomorpha in South America is purported to be the CTA-27 site in the Contamana region of Perú, which is hypothesized to be ∼41 Ma (Middle Eocene) in age. However, the presence of the same caviomorph species and/or genera at both CTA-27 and at Santa Rosa is now difficult to reconcile with a >11-My age difference. To further test the Middle Eocene age estimate for CTA-27, we ran multiple Bayesian tip-dating analyses of Caviomorpha, treating the ages of all Paleogene species from Perú as unknown. These analyses produced mean age estimates for Santa Rosa that closely approximate the maximum 29.6 ± 0.08 Ma composite date provided by detrital zircons, but predict that CTA-27 is much younger than currently thought (∼30 Ma). We conclude that the ∼41 Ma age proposed for CTA-27 is incorrect, and that there are currently no compelling Eocene records of either rodents or primates in the known fossil record of South America. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Amazon basin; Caviomorpha; Perupithecus; Ucayalipithecus; Zircon dating
语种	英语
scopus关键词	zirconium; Article; elemental analysis; Eocene; fossil; Haplorhini; laser ablation inductively coupled plasma mass spectrometry; nonhuman; Oligocene; Peru; population research; rodent; South America; species distribution; stone analysis
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238804
作者单位	Department of Vertebrate Zoology, Natural History Museum of Los Angeles County, Los Angeles, CA 90007, United States; GeoSep Services, Moscow, ID 83843, United States; Department of Anatomical Sciences, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY 11794, United States; Ecosystems and Environment Research Centre, School of Science, Engineering and Environment, University of Salford, Manchester, M5 4WT, United Kingdom; Department of Integrative Anatomical Sciences, Keck School of Medicine of USC, University of Southern California, Los Angeles, CA 90033, United States
推荐引用方式 GB/T 7714	Campbell K.E.,Jr.,O’Sullivan P.B.,et al. An early Oligocene age for the oldest known monkeys and rodents of South America[J],2021,118(37).
APA	Campbell K.E.,Jr.,O’Sullivan P.B.,Fleagle J.G.,De Vries D.,&Seiffert E.R..(2021).An early Oligocene age for the oldest known monkeys and rodents of South America.Proceedings of the National Academy of Sciences of the United States of America,118(37).
MLA	Campbell K.E.,et al."An early Oligocene age for the oldest known monkeys and rodents of South America".Proceedings of the National Academy of Sciences of the United States of America 118.37(2021).