Compressed materials of fossil foliage described here as Itea polyneura sp.nov.(Iteaceae)were collected from the Oligocene ofWenshan,Yunnan Province,southwestern China.The identification is based on the following char...Compressed materials of fossil foliage described here as Itea polyneura sp.nov.(Iteaceae)were collected from the Oligocene ofWenshan,Yunnan Province,southwestern China.The identification is based on the following characters:eucamptodromous secondary veins,strict scalariform tertiary veins,irregular tooth with setaceous apex.The leaf morphology of all modern and fossil species was compared with the new species from Wenshan and show that I.polyneura is most similar to the extant East Asian species Itea omeiensis,which inhabits subtropical forests of southern China.This discovery represents the first unambiguous leaf fossil record of Itea in East Asia.Together with other species in the Wenshan flora and evidence from several other flora in southern China,these findings demonstrate that Itea from East Asia arose with the Paleogene modernization.展开更多
基金National Natural Science Foundation of China(No.31800183,No.U1502231,No.41661134049)Yunnan Basic Research Projects(No.2019FB026)Chinese Academy of Sciences(CAS)135 Program(No.2017XTBGT03).
文摘Compressed materials of fossil foliage described here as Itea polyneura sp.nov.(Iteaceae)were collected from the Oligocene ofWenshan,Yunnan Province,southwestern China.The identification is based on the following characters:eucamptodromous secondary veins,strict scalariform tertiary veins,irregular tooth with setaceous apex.The leaf morphology of all modern and fossil species was compared with the new species from Wenshan and show that I.polyneura is most similar to the extant East Asian species Itea omeiensis,which inhabits subtropical forests of southern China.This discovery represents the first unambiguous leaf fossil record of Itea in East Asia.Together with other species in the Wenshan flora and evidence from several other flora in southern China,these findings demonstrate that Itea from East Asia arose with the Paleogene modernization.
基金The authors are grateful to two anonymous reviewers for their constructive comments, which significantly improved the manuscript. The authors thank fellow members of staff of the Palaeoecology group in Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences for assistance during sample collection and productive critical discussions Professor Yun Fu from the Central Laboratory of Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences for assistance during the TN mea- surements+1 种基金 Dr. Olesya V. Bondarenko, from the Russian Academy of Sciences, Vladivostok, for her help and support during sample preparation Yi-Min Tian from the Faculty of Land Resource Engi- neering, Kunming University of Science and Technology, for her assistance when preparing and observing thin sections. The authors are grateful to Dr. Andrea Kern from the USGS and Dr. Dayou Zhai from Yunnan University for fruitful discussions and suggestions to improve the manuscript. This study was supported by National Nat- ural Science Foundation of China （U1502231）, the CAS 135 Program （XTBG-F01）, and a grant from the China Scholarship Council to J. Lebreton Anberr6e （2013GCX606）. Shihu Li and Chenglong Deng acknowledge support from the National Natural Science Foundation of China （41404056）, and the State Key Laboratory of Lithospheric Evolution （11431780）. Shu-Feng Li was supported by the Foundation of the State Key Laboratory of Paleobiology and Stratigraphy, Nanjing Institute of Geology and Paleontology, CAS （15310）. This work is part of the NECLIME （Neogene Climate of Eurasia） network.
