重新评估Pseudobornia ursina Nathorst:对古老时代形植物的进化和系统学的影响
Alexis Rastier1, Eliott Capel1, Valentin Fischer1
1Evolution & Diversity Lab, Université de Liège, Allée du Six-Août, B18, Sart Tilman, 4000 Liège, Belgium.
Annals of botany
|December 10, 2025
概括
这项研究澄清了Pseudobornia ursina的繁殖结构,将这个已灭绝的ophyte置于Equisetales血统中,并揭示了早期ophyte进化的见解.
科学领域:
- 古植物学是古植物学.
- 进化生物学 进化生物学
- 人类遗传学 是一个学科.
背景情况:
- 现在罕见的斯芬诺菲特在古生物学期的煤沼泽中是多样化的.
- 早期植物的起源和关系仍然不清楚.
- Pseudobornia ursina 是了解球形植物起源的关键,但它的繁殖结构仍在争论中.
研究的目的:
- 重新描述和重建Pseudobornia ursina的生殖结构.
- 评估其与其他类植物和相关群体的遗传学关系.
- 更新对类动物特征演变的理解.
主要方法:
- 从类型地区重新检查化石.
- 斯特罗比利和肥沃的附属部分的形态分析.
- 与Sphenophyllales,Equisetales和干群单植物进行比较分析.
- 使用和贝叶斯方法进行的家族遗传学分析.
主要成果:
- P. ursina strobilus的特点是有茎的,带有子的附属物,带有斜插入.
- 在一个容器上观察到大约30个直立的子,被深切的双截子所支.
- 植物性特征表明Equisetalean亲缘关系,而生殖性特征类似于茎虫.
- 遗传学分析将P. ursina置于类动物中.
结论:
- 阐明了Pseudobornia ursina的形态和字体,将其置于干 Equisetales 中.
- 这一发现表明,茎形植物的肥沃附属物演变为紧.
- 这种进化路径可能导致了Sphenophyllales和Equisetales的分歧.
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