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

doi:10.1016/j.pld.2020.09.006

Plant Diversity ›› 2021, Vol. 43 ›› Issue (02): 142-151.DOI: 10.1016/j.pld.2020.09.006

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

Yi-Min Tian^a, Jian Huang^b, Tao Su^b,c, Shi-Tao Zhang^a

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 出版日期:2021-04-25 发布日期:2021-05-20
通讯作者: Jian Huang, Shi-Tao Zhang
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^a, Jian Huang^b, Tao Su^b,c, Shi-Tao Zhang^a

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:2020-05-10 Revised:2020-09-08 Online:2021-04-25 Published:2021-05-20
Contact: Jian Huang, Shi-Tao Zhang
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/Abstract

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.

关键词: East Asia, Itea, Iteaceae, Leaf fossil, Oligocene, Southwestern China

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.

Key words: East Asia, Itea, Iteaceae, Leaf fossil, Oligocene, Southwestern China

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.

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

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

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