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Biotic interchange through lowlands of Tibetan Plateau suture zones during Paleogene
Liu, Jia; Su, Tao; Spicer, Robert A.; Tang, He; Deng, Wei-Yu-Dong; Wu, Fei-Xiang; Srivastava, Gaurav6; Spicer, Teresa; Truong Van Do7; Deng, Tao5; Zhou, Zhe-Kun

A substantial biotic interchange took place between Gondwanan India and Laurasia immediately following the India-Eurasia collision. Located just north of the collision zone, the role of the Tibetan Plateau in the geographic interchange of biota is still unknown because lack of fossil evidence. Here, well-preserved samara fossils of Ailanthus (the family Simaroubaceae) are described from the Lunpola and Nima basins, central Tibetan Plateau, ranging in age from the latest Paleocene to the Late Oligocene. These fossils are the largest samara fossils of this genus found so far. Characteristics such as the main ventral vein located in the intramarginal part of the samara, and the stylar scar located on the midline of the seed suggest that they represent a new species, which we herein name Ailanthus maximus J. Liu, T. Su et Z.K. Zhou, sp. nov. These findings greatly expand the known spatial distribution of Ailanthus in the Paleogene, and suggest that the Tibetan Plateau has played an important role in the migration of biota between Gondwanan India and the Northern Hemisphere. In addition, A. maximus is morphologically similar to A. triphysa, a living species which is naturally distributed in tropical and subtropical regions in Southeast Asia at elevation no more than 600 m, indicating a tropical or subtropical lowland environment in the central Tibetan Plateau during the latest Paleocene to Late Oligocene. Moreover, together with previous paleoaltimetric estimates, we propose that tropical or subtropical lowlands along the Bangong-Nujiang Suture Zone and the Yarlung-Zangpo Suture Zone existed in some parts of the Tibetan Plateau during the Paleogene only obtained their current elevation during the Neogene.

Subject AreaPhysical Geography ; Geology ; Paleontology
Indexed BySCI
WOS IDWOS:000469154700004
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Document Type期刊论文
Affiliation1.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, CAS Key Lab Trop Forest Ecol, Mengla 666303, Yunnan, Peoples R China
2.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming 650204, Yunnan, Peoples R China
3.Spicer, Robert A.] Open Univ, Sch Environm Earth & Ecosyst Sci, Milton Keynes MK76AA, Bucks, England
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China
6.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China
7.Birbal Sahni Inst Palaeosci, Lucknow 226007, Uttar Pradesh, India
8.Vietnam Acad Sci & Technol, Vietnam Natl Museum Nat, Hanoi 100803, Vietnam
Recommended Citation
GB/T 7714
Liu, Jia,Su, Tao,Spicer, Robert A.,et al. Biotic interchange through lowlands of Tibetan Plateau suture zones during Paleogene[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2019,524(x):33-40.
APA Liu, Jia.,Su, Tao.,Spicer, Robert A..,Tang, He.,Deng, Wei-Yu-Dong.,...&Zhou, Zhe-Kun.(2019).Biotic interchange through lowlands of Tibetan Plateau suture zones during Paleogene.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,524(x),33-40.
MLA Liu, Jia,et al."Biotic interchange through lowlands of Tibetan Plateau suture zones during Paleogene".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 524.x(2019):33-40.
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