热足类恐龙牙微衣物中的种际和内属变异及其古生态影响
Cassius Morrison1,2, James Gregory3,4, Christopher Jackson3,4
1Department of Earth Sciences, University College London, London, UK.
Anatomical record (Hoboken, N.J. : 2007)
|March 9, 2026
概括
牙科微穿戴纹理分析 (DMTA) 提供了一种推断恐龙饮食的新方法. 这项研究提供了使用隔离的热足动物牙重建古代饮食生态的指导方针.
科学领域:
- 古生物学的古生物学
- 功能性形态学 功能性形态学
- 饮食生态学 饮食生态学
背景情况:
- 从形态学和罕见的胃部含量来看,通常会推断中型到大型的掠食性热足类恐龙的饮食协会.
- 对于缺乏直接证据的种群来说,详细的饮食重建是具有挑战性的,比如胃内容或矿.
- 牙科微型磨损纹理分析 (DMTA) 是已灭绝的动物饮食的潜在代理.
研究的目的:
- 评估DMTA对评估脚动物恐龙饮食的有用性.
- 为了确定单个牙是否可以代表整个牙的微磨损模式.
- 建立用于测定热足动物中DMTA的牙采样指南.
主要方法:
- 牙科微型磨损纹理分析 (DMTA) 在四种热足恐龙的牙上进行:Allosaurus,Ceratosaurus,Irritator和Tyrannosaurus.
- 检查了微米尺度的表面纹理,以确定饮食指标.
- 在单个标本中,沿着牙行分析了纹理变化.
主要成果:
- 牙的位置显著影响DMTA的结果.
- 提出了具体的抽样准则,以确保可靠的DMTA数据.
- 这些指导方针包括在单个头骨元素内采样,一致的牙侧面 (嘴唇/舌头),避免对牙和大嘴唇表面进行比较.
结论:
- DMTA是一种可行的方法来推断类动物的饮食,即使有孤立的牙.
- 限制性采样协议对于准确的饮食重建使用类动物牙至关重要.
- 这种方法增强了研究化石组合中的饮食生态学的能力.
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