基于化石的生物地理分析表明,在罗纪早期,斯奎马塔王冠中的欧亚区域化在尤拉西亚地区化
Ian V Wilenzik1, Benjamin B Barger1, R Alexander Pyron1
1Department of Biology, George Washington University, Washington D.C., United States of America.
PeerJ
|May 6, 2024
概括
斯卡玛塔 (,蛇和两动物) 的起源是在潘盖亚本地化,早期的血统区域化到欧亚大陆和劳拉西亚. 冈多瓦纳的分布发生在白纪晚些时候,随后是复杂的纪分散.
科学领域:
- 古生物学的古生物学
- 生物地理学是生物地理学.
- 进化生物学 进化生物学
背景情况:
- (,蛇,两动物) 自三纪以来表现出一个复杂的生物地理历史.
- 以前的研究缺乏早期状动物祖先范围的大规模重建.
- 已知纪末的潘盖亚分布,但现存辐射的起源和占用程度尚不清楚.
研究的目的:
- 用更新的构造模型和化石数据重建早期状动物血统的祖先范围.
- 为了测试关于在潘盖亚中状动物起源的局部化和区域化的假设.
- 为了了解现存的酸辐射的生物地理历史.
主要方法:
- 利用最近的构造模型,对9个离散板块上的9755种现存和化石形类动物的分布进行编码.
- 纳入了来自三个灭绝的血统的罗纪和白纪化石约束.
- 用分子族系和生物地理模型与基于化石的节点约束来建模皇冠Squamata的祖先范围.
主要成果:
- 重建了Squamata在潘盖亚的本地化起源,并早期将其区域化到欧亚大陆和劳拉西亚.
- 主要血统 (Alethinophidia,Scolecophidia,Gekkotan) 的Gondwanan区域化发生在白纪中期.
- 中生生物地理涉及欧亚起源和从劳拉西亚分散到冈德瓦纳,随后是复杂的中生时期事件.
结论:
- 现存的状动物血统的起源不是完全的潘盖亚分布,而是分裂的超级大陆内的局部事件.
- 状生物地理涉及陆地扩张,陆地桥梁殖民化和跨海分散.
- 建议对化石分支进行进一步的研究,以更全面地了解状动物的历史.
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