纪和古世的化石揭示了Cornales中一个已经灭绝的较高分类,即木顺序
Austin T Nguyen1,2, Brian A Atkinson1,2
1Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, 66045, KS, USA.
American journal of botany
|July 16, 2024
概括
一个新的化石属Fenestracarpa washingtonensis扩大了已知已灭绝的花植物的多样性. 遗传学分析揭示了Cornales中一个完全灭绝的分类,突出显示了过去的血管种多样性.
科学领域:
- 古植物学是古植物学.
- 人类遗传学 是一个学科.
- 血管精子的进化过程
背景情况:
- 鉴定具有不确定的亲属关系的化石木种的特征对于理解已灭绝的高种类的多样性至关重要.
- 角类 (Cornales) 序列,其各种不确定的家族亲属关系的灭绝的种类,是研究血管精子周转的理想模型.
- 已灭绝的芽种的有限的家族遗传整合可能会掩盖开花植物进化历史的全部范围.
研究的目的:
- 为了描述一个新的已灭绝的Cornales属,无法将其分配给一个现存的家族.
- 使用遗传学分析重建化石科纳尔的遗传学关系.
- 增强对血管精子多样性和进化模式的理解.
主要方法:
- 从Cedar地区形成 (坎帕尼亚) 采集和切割永久矿物化内骨.
- 将形态数据纳入数据集以进行遗传学分析.
- 使用伪化石化分析,总证据分析和基于支架的方法来确定化石关系.
主要成果:
- 关于Fenestracarpa washingtonensis gen. nov. 和 sp. 的描述 基于独特的化石标志. 基于独特的化石标志. 基于独特的化石标志.
- 验证形态数据集的准确性,以恢复主要类群到家族层面的种群.
- 遗传学分析将Fenestracarpa和其他化石属置于完全灭绝的Cornales类.
结论:
- 这项研究增加了已知已灭绝的Cornales的多样性.
- 这些发现表明,Cornales中的一个已灭绝的更高分类早期分离并持续到白纪末期的灭绝.
- 这种已灭绝的类最终在古新生代灭绝,这表明了大量的花周转.
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