Articles

Early Oligocene Itea (Iteaceae) leaves from East Asia and their biogeographic implications

  • Yi-Min Tian ,
  • Jian Huang ,
  • Tao Su ,
  • Shi-Tao Zhang
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  • a Kunming University of Science and Technology, Kunming, Yunnan, 650500, China
    b Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan, 666303, China
    c University of the Chinese Academy of Sciences, Beijing, 100049, China

收稿日期: 2020-05-10

  修回日期: 2020-09-08

  网络出版日期: 2021-05-20

基金资助

We acknowledge financial support from the Chinese Academy of Sciences "Light of West China" Program, 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).

Early Oligocene Itea (Iteaceae) leaves from East Asia and their biogeographic implications

  • Yi-Min Tian ,
  • Jian Huang ,
  • Tao Su ,
  • Shi-Tao Zhang
Expand
  • a Kunming University of Science and Technology, Kunming, Yunnan, 650500, China
    b Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan, 666303, China
    c University of the Chinese Academy of Sciences, Beijing, 100049, China

Received date: 2020-05-10

  Revised date: 2020-09-08

  Online published: 2021-05-20

Supported by

We acknowledge financial support from the Chinese Academy of Sciences "Light of West China" Program, 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).

摘要

Compressed materials of fossil foliage described here as Itea polyneura sp. nov. (Iteaceae) were collected from the Oligocene of Wenshan, 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.

本文引用格式

Yi-Min Tian , Jian Huang , Tao Su , Shi-Tao Zhang . Early Oligocene Itea (Iteaceae) leaves from East Asia and their biogeographic implications[J]. Plant Diversity, 2021 , 43(02) : 142 -151 . DOI: 10.1016/j.pld.2020.09.006

Abstract

Compressed materials of fossil foliage described here as Itea polyneura sp. nov. (Iteaceae) were collected from the Oligocene of Wenshan, 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.

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