A new Cercis (Leguminosae) from the middle Miocene of Fujian, China

A new Cercis (Leguminosae) from the middle Miocene of Fujian, China
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中国福建中新世中期的紫荆属(豆科)一新种

DOI:
10.1080/08912963.2021.1900170
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发表时间:
2021-03
期刊:
影响因子:
1.4
通讯作者:
Wu Xieting
Wu Xieting
中科院分区:
地球科学3区
文献类型:
--
作者:
Wang Zixi;Shi Gongle;Sun Bainian;Jia Hui;Dong Chong;Yin Sunxin;Wu Xieting

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中国低纬度地区新近纪植物化石的发现,对于了解该地区植物多样性和古环境的历史具有重要意义。本文描述了中国东南部福建佛滩群(~14.7 Ma)中保存完好的紫荆果化石。通过与现存种和化石种的形态解剖学比较,我们将这些化石命名为Cerciszhangpuensissp. nov. chinensis A.V. Bunge等。目前描述的物种是亚洲最南端的化石记录。此外,我们还首次对紫荆属豆荚化石的角质层结构进行了研究。紫荆属化石的发现表明福建早在中新世中期就有紫荆属的存在。已有的化石记录表明,紫荆属植物始新世最早出现在北美,渐新世开始在欧洲和亚洲扩散,中新世达到分布高峰。我们的结论是,东亚可能代表了紫荆在中新世的多样化的主要中心之一。
ABSTRACT Neogene plant fossils from low latitudes of China are critical for understanding the history of plant diversity and paleoenvironment in that region. Here we describe well-preserved Cercis fruit fossils from the Fotan Group (~14.7 Ma) in Fujian, southeastern China. Based on detailed morphological and anatomical comparisons with extant and fossil species, we refer to these fossils as Cercis zhangpuensis sp. nov. Cercis zhangpuensis, most similar to C. chinensis A.V. Bunge among extant species of the genus. The currently described species is the southmost fossil record of the genus in Asia. In addition, we have studied cuticle structures of Cercis pod fossils for the first time. The occurrence of Cercis fossils indicates that the genus existed in Fujian, China since the middle Miocene. Available fossil records indicate that Cercis firstly appeared in North America during the Eocene, then spread in Europe and Asia since the Oligocene, with its distribution attaining the peak in the Miocene. We conclude that East Asia may represent one of the major centres of diversification of Cercis in the Miocene.
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