中 dinosaurs 的替代牙和牙微解剖学和微观结构的新数据
Thiago Carlisbino1, Brodsky Dantas Macedo de Farias1, Fernando Antonio Sedor2
1Programa de Pós-graduação em Geociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
Anatomical record (Hoboken, N.J. : 2007)
|April 6, 2024
概括
珀米亚半恐龙,早期的海洋羊动物,拥有专门的牙来捕食水生动物. 它们独特的牙,带有脊和加强的 anchorage,可能有助于捕捉猎物,可能与增长期间的饮食变化.
科学领域:
- 古生物学的古生物学
- 脊椎动物动物学 脊椎动物动物学
- 海洋生物学 海洋生物学
背景情况:
- 巨龙代表了最早适应了Permian Irati-Whitehill海域海洋生物的两动物.
- 他们的骨特征表明水生适应,独特的牙在养策略中起着关键作用.
研究的目的:
- 为了描述来自巴西下珀米亚伊拉蒂形成的美索的牙.
- 分析与它们的海洋息地和养生态有关的中 dinosaur 牙的功能形态.
主要方法:
- 分析了来自下波斯河伊拉蒂形成的中恐龙标本.
- 详细检查牙形态,包括牙面脊,牙结构和基本 anchorage机制.
- 对牙置换模式的研究.
主要成果:
- 弥撒龙的牙是细的,形的,有基质脊,是水生羊动物的特征.
- 牙包括正牙和球形牙层;牙,,和膜骨增强牙的定.
- 唇垂直,交替的牙置换确保了连续的牙,一个plesiomorphic特征.
结论:
- 巨龙的牙适应于在海洋环境中捕捉猎物,不一定是为了穿透坚硬的猎物.
- 基于牙的适应性,建议从年龄较小的猎物转变为年龄较大的猎物.
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