Asplenium sanshuiense sp. nov.:the Lowest Latitude Fossil Record of the Genus  

作　　者：XU Kewang LIAO Wenbo JIN Jianhua LIU Xiaoyan 

机构地区：[1]State Key Laboratory of Biocontrol,Guangdong Provincial Key Laboratory of Plant Resources,and School of Life Sciences,Sun Yat-sen University [2]State Key Laboratory of Palaeobiology and Stratigraphy(Nanjing Institute of Geology and Palaeontology,CAS)

出　　处：《Acta Geologica Sinica(English Edition)》2017年第4期1179-1189,共11页地质学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.41210001);the joint Project of the National Natural Science Foundation of China and the Russian Foundation for Basic Research (Grant Nos.41611130044,16-55-53007);the Fundamental Research Funds for the Central Universities (Grant no.161gjc28);State Key Laboratory of Palaeobiology and Stratigraphy(Nanjing Institute of Geology and Palaeontology,CAS)(No.163109);the Scientific Research Fund,Hongda Zhang,Sun Yat-sen University

摘　　要：Extant Asplenium is one of the most widespread fern groups and occurs in the temperate and tropical regions. However, the fossil records of this genus are poorly documented, especially in the low latitudes. Here, a new species, Asplenium sanshuiense sp. nov. is described from the early Eocene of Sanshui Basin, Guangdong Province, South China. This is the lowest modern latitude fossil record of Asplenium and the first fossil assignment of A. section Darea （Jussieu） Bak., as well as the first fossil record of Asplenium reported from South China. This new species shows that Asplenium had already spread into South China by the early Eocene and the section Darea （Jussieu） Bak. was identifiable within the genus Asplenium during that time. This new species, combined with previous fossil spore-pollen records indicates a warm and humid climate in the Sanshui Basin of the early Eocene.Extant Asplenium is one of the most widespread fern groups and occurs in the temperate and tropical regions. However, the fossil records of this genus are poorly documented, especially in the low latitudes. Here, a new species, Asplenium sanshuiense sp. nov. is described from the early Eocene of Sanshui Basin, Guangdong Province, South China. This is the lowest modern latitude fossil record of Asplenium and the first fossil assignment of A. section Darea （Jussieu） Bak., as well as the first fossil record of Asplenium reported from South China. This new species shows that Asplenium had already spread into South China by the early Eocene and the section Darea （Jussieu） Bak. was identifiable within the genus Asplenium during that time. This new species, combined with previous fossil spore-pollen records indicates a warm and humid climate in the Sanshui Basin of the early Eocene.

关 键 词：ASPLENIUM early Eocene Phytogeographical implications Sanshui Basin 

分 类 号：Q914[天文地球—古生物学与地层学]