Diversification of Eupolypods in Mid-Cretaceous—Evidenced by Myanmar Amber Forest  

作　　者：Cunxiang Li Libing Zhang 

机构地区：[1]State Key Laboratory of Palaeobiology and Stratigraphy, Center for Excellence in Life and Palaeoenvironment, Nanjing Institute of Geology and Palaeontology, Nanjing, China [2]Missouri Botanical Garden, St. Louis, Missouri, USA [3]Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China

出　　处：《Open Journal of Geology》2019年第10期726-730,共5页地质学期刊（英文）

摘　　要：The evolutionary history of Eupolypods still remains unclear, especially on its diversification scenarios. In recent years, it has been found that approximately 100 million-year-old Myanmar amber provides a unique source of polypod fossils. Different families and numerous sporangia, spores, and scales have been found in Myanmar amber. These discoveries are nevertheless important because they provided the first unequivocal fossil evidence that the diversity of eupolypod ferns was present already in the mid-Cretaceous Myanmar amber forest. This clearly shows that Eupolypods originated before mid-Cretaceous, probably as early as the Early Jurassic, which is consistent with the recent divergence time estimate based on molecular dating.The evolutionary history of Eupolypods still remains unclear, especially on its diversification scenarios. In recent years, it has been found that approximately 100 million-year-old Myanmar amber provides a unique source of polypod fossils. Different families and numerous sporangia, spores, and scales have been found in Myanmar amber. These discoveries are nevertheless important because they provided the first unequivocal fossil evidence that the diversity of eupolypod ferns was present already in the mid-Cretaceous Myanmar amber forest. This clearly shows that Eupolypods originated before mid-Cretaceous, probably as early as the Early Jurassic, which is consistent with the recent divergence time estimate based on molecular dating.

关 键 词：MID-CRETACEOUS Myanmar AMBER Eupolypods DIVERGENCE TIME 

分 类 号：R73[医药卫生—肿瘤]