Early diversification of early Cretaceous Angiosperms in Mongolia

2009年至2011年，我们在蒙古进行了五次白垩纪沉积物的实地考察。主要分布在戈壁沙漠东南侧的巴加努尔、胡伦杜克、捷夫希因戈壁、图格鲁格、希维敖包、什因胡达克、巴彦和埃尔赫特。成员来自蒙古古生物中心、耶鲁大学、芝加哥植物园、金泽大学和新泻大学。我们目前的Tevshiin-Govi地方，这是一个小的露天褐煤矿，乌兰巴托西南部的初步结果。在矿井的几个层面，木乃伊化的植物化石在压缩的褐煤质沉积物中缠结在一起，但在其他方面几乎没有改变，主要是几种不同种类的线性叶子。表皮细节保存完好，生殖结构多样，信息丰富且常见。初步研究表明，至少存在十几种种子植物化石，由大量分散的植物器官代表。我们还与马来西亚大学的李教授在马来西亚进行了实地调查，以与蒙古的结果进行比较。

We performed field trips of Cretaceous sediments in Mongolia for five times during 2009 to 2011. The main localities are Baganuur, Khuren Dukh, Tevshiin Govi, Tugrug, Shivee Ovoo, Shine Khudak, Bayan and Erhert in southeastern side of Govi desert. The members are from Mongolian Paleontological Center, Yale University, Chicago Botanical Garden, Kanazawa University and Niigata University. We present preliminary results on the Tevshiin-Govi locality, which is a small opencast lignite mine, southwest of Ulaanbaatar. At several levels in the mine, mummified fossil plants occur matted together in compressed, lignitic, but otherwise very little altered deposits that are dominated by linear leaves of several different kinds. Cuticular details are well-preserved and reproductive structures are diverse, informative and common. Preliminary study indicates the presence of at least a dozen fossil seedplants represented by a large number of dispersed plant organs. We also performed a field survey in Malaysia with Prof. Lee, Malay University, to compare with theresults from Mongolia.