文章基本信息

标题：Diversification of Eupolypods in Mid-Cretaceous—Evidenced by Myanmar Amber Forest
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作者：Cunxiang Li ; Libing Zhang
期刊名称：Open Journal of Geology
印刷版ISSN：2161-7570
电子版ISSN：2161-7589
出版年度：2019
卷号：9
期号：10
页码：726-730
DOI：10.4236/ojg.2019.910086
语种：English
出版社：Scientific Research Pub
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.
关键词：Mid-CretaceousMyanmar AmberEupolypodsDivergence Time