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一个来自中国白纪早期的木
Ge Sun1, David L Dilcher, Hongshan Wang
1Paleontological Institute of Shenyang Normal University, Shenyang 110034, China. sunge@synu.edu.cn
Nature
|April 2, 2011
概括
一个新的化石,Leefructus gen. nov.,揭示了早期白纪早期的科多样性. 这一发现提供了关于开花植物的进化历史和它们的主导地位的见解.
科学领域:
- 古植物学是古植物学.
- 血管精子系统学
- 进化生物学 进化生物学
背景情况:
- 今天,芽植物,特别是芽植物是主要的陆地植被,但它们的早期进化历史仍然不太清楚.
- 分子系统学识别了主要的血管精子系,包括基底血管精子和花,其中花包括大多数现存物种.
研究的目的:
- 为了记录化石记录中幼虫的早期存在和多样性.
- 描述和表征一种新的化石属,Leefructus gen. nov.,并确定其遗传学亲缘关系.
主要方法:
- 化石植物遗骸的形态分析,重点关注叶子和生殖结构.
- 沉积层 (Yixian形成) 的放射测年法,以确定化石的年龄.
- 化石形态与现存的植物家族的比较,特别是像Ranunculaceae这样的基底幼虫.
主要成果:
- 发现和描述Leefructus gen. nov.,其特点是三角形叶子和特定的繁殖结构,表明与Ranunculaceae的亲缘关系.
- 战略学分析将Leefructus gen. nov. 置于低白时期的宜形成中,其年龄为1.2261.258亿年.
- 这种化石的年龄与已知的乌迪科特化石记录一致并延伸,表明它们的存在和多样性来自巴雷米亚-阿普蒂亚边界.
结论:
- 利弗鲁克图斯 (Leefructus gen. nov.) 提供了重要的证据,证明了白纪早期的基底白植物的早期存在和多样化.
- 这一发现为了解形种的早期进化历史和生态建立提供了至关重要的数据.
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