来自中生代非鸟类恐龙的血管遗骸的taphonomic变异
M H Schweitzer1,2,3,4, W Zheng5, E Dickinson5,6,7
1Department of Biological Sciences, North Carolina State University, Raleigh, NC, USA. schweitzer@ncsu.edu.
Scientific reports
|February 5, 2025
概括
在恐龙化石中发现的灵活,半透明,血管状的成分被证实是内源性的. 这项研究提供了强有力的证据,证明它们起源于非鸟类恐龙中,尽管存在一些微生物污染.
科学领域:
- 古生物学的古生物学
- 分子生物学分子生物学
- 塔法诺米 (Taphonomy) 是一种听力学.
背景情况:
- 非鸟类恐龙骨中的柔性,半透明,血管类材料的起源仍然存在争议.
- 现有的降解模型无法预测这种类型的保存.
- 对于这种保存的陶声学途径尚不清楚,对内源性的分子证据有限.
研究的目的:
- 调查从非鸟类恐龙骨遗骸中回收的类似船只的材料的身份和来源.
- 为了比较化石容器与现存种类的化石容器,以评估内源性.
- 为了解决关于化石血管组织的广泛分子数据的缺乏.
主要方法:
- 在六个非鸟类恐龙标本的容器状物质上利用了微观形态学和分子技术的组合.
- 包括多样化的恐龙种群,沉积环境和地质年龄.
- 结果与从现存的鸟 (Struthio camelus) 骨头中分离出来的血管进行了比较.
主要成果:
- 微形态学和分子分析为化石来源的血管的内生起源提供了强有力的支持.
- 来自化石容器的数据与现存种类的数据有相似之处.
- 在一些化石标本中发现了侵入性微生物的证据.
结论:
- 从非鸟类恐龙骨头中回收的柔性,血管状的成分在很大程度上是内源的.
- 这项研究扩大了对化石血管组织中分子保存的理解.
- 虽然支持内源性起源,但微生物的存在凸显了化石化过程的复杂性.
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