Home
Search
JSE at Wiley-Blackwell

Journal

Accepted Articles

Early View

Current Issue

Archive

  Manuscript Submission

Online Submission

Instructions for Authors

Copyright Transfer Agreement


About JSE

Aims & Scope

Editorial Board

Online Office

Sponsors & Publisher


Partner Journals

Other Journals from IB-CAS

TAXON

Plant Diversity and Resources

First fossil record of Cedrelospermum (Ulmaceae) from the Qinghai-Tibetan Plateau: Implications for morphological evolution and biogeography

Lin-Bo Jia1,3, Tao Su2,3*, Yong-Jiang Huang1, Fei-Xiang Wu4, Tao Deng5, Zhe-Kun Zhou1,2*

1Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, China

2Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, China

3University of Chinese Academy of Sciences, Beijing 100049, China

4Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China

5Key Laboratory of Evolutionary Systematics of Vertebrates, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China

Keywords: extinct plants, paleobotany, phytogeography, Tibet

Abstract:

Cedrelospermum is an extinct genus in the Ulmaceae with abundant fossil records in North America and Europe. However, so far, fossil records of this genus from Asia are sparse, which limits the interpretations of the morphological evolution and biogeographical history of the genus. Here we report well preserved fruits (Cedrelospermum tibeticum sp. nov.) and a leaf (Cedrelospermum sp.) of Cedrelospermum from the upper Oligocene Lunpola and Nyima basins in central Qinghai-Tibetan Plateau (QTP). This is the first fossil record of Cedrelospermum in the QTP, demonstrating that this genus grew in this region during the late Oligocene. Cedrelospermum tibeticum fruits are double-winged, morphologically similar to the Eocene and Oligocene double-winged Cedrelospermum species from North America. This supports the hypothesis that Cedrelospermum migrated to Asia from North America via the Bering Land Bridge. Given that Cedrelospermum was a typical element of Northern Hemispheric flora in the Paleogene and Neogene, the presence of this genus indicates that the central region of the QTP was phytogeographically linked with other parts of the Northern Hemisphere during the late Oligocene. The morphological observations of C. tibeticum fruits and other double-winged Cedrelospermum fruits suggests an evolutionary trend from obtuse to acute apex for the primary wing. Cedrelospermum tibeticum likely had warm and wet climatic requirements. This type of an environment possibly existed in central QTP in the late Oligocene, thereby supporting the survival of C. tibeticum.


Copyright © 2017. The Editorial Office, Journal of Systematics and Evolution, Institute of Botany, CAS
No. 20 Nanxincun, Xiangshan, Beijing 100093, China
Tel.: +86 10 62836132; 62836572    Fax:+86 10 62836132
E-mail: jse@ibcas.ac.cn
վţICP16067583-32