Shi Xiao, Sun Yuewu, Meng Fanli, Yu Jianxin, Lan Zilie
Department of Geology, College of Earth Sciences, Jilin University, Changchun 130061, China.
International Center of Future Science, Dinosaur Evolution Research Center, Jilin University, Changchun 130012, China.
Biology (Basel). 2022 Nov 7;11(11):1624. doi: 10.3390/biology11111624.
The extant is endemic to east and southeast Asia, while -like trees were widely distributed in the northern hemisphere in Earth's history. In this paper, we reported a novel wood fossil of Shi, Sun, Meng et Yu sp. nov., collected from the middle part of the Yingcheng Formation, Yingcheng Coal Mine, Changchun City, Jilin Province, northeast China. The quantitative growth-ring analyses of indicate that it was evergreen with a leaf longevity of 1-3 years, which is consistent with the foliar retention of extant . Its high ring-markedness index (RMI) indicates that the climate seasonality was pronounced during the Early Albian period in the Songliao Basin, northeast China. The fossil records of and closely related taxa indicate that this group might have originated from high latitudes in the northern hemisphere, then spread and migrated southward during the Late Jurassic and Cretaceous periods, gradually decreased in the Cenozoic period, and so far only survives in east and southeast Asia.
现存的该物种是东亚和东南亚特有的，而类似该物种的树木在地球历史上曾广泛分布于北半球。在本文中，我们报道了一种新的该属木材化石，即Shi, Sun, Meng et Yu sp. nov.，它采自中国东北吉林省长春市营城煤矿营城组中部。对该化石的定量生长轮分析表明，它是常绿植物，叶片寿命为1至3年，这与现存该物种的叶片保留情况一致。其高环纹标记指数（RMI）表明，中国东北松辽盆地早阿尔比阶时期气候季节性明显。该物种及密切相关类群的化石记录表明，这一类群可能起源于北半球高纬度地区，然后在晚侏罗世和白垩纪时期向南扩散和迁移，在新生代逐渐减少，至今仅存于东亚和东南亚。
