哺乳动物的进化. 来自罗纪和哺乳动物形式的生态多样化的一种树木性docodont
Qing-Jin Meng1, Qiang Ji2, Yu-Guang Zhang1
1Beijing Museum of Natural History, Beijing 100050 China.
概括
一种新发现的中纪罗纪的多科多坦哺乳动物,来自中国,具有爬的适应性和吃东西的饮食,包括植物汁液. 这一发现揭示了早期哺乳动物的生态多样性.
科学领域:
- 古生物学的古生物学
- 哺乳动物的进化过程
- 中生代生态系统 中生代生态系统
背景情况:
- 多科多顿的哺乳动物形式代表了早期哺乳动物的相对群体.
- 以前的研究表明,主要是食虫或食肉动物的饮食和适应挖掘或游泳在docodontans.
研究的目的:
- 描述一个来自中国罗纪中期的新型docodontan化石.
- 为了研究这种新物种的运动和饮食适应.
- 了解早期哺乳动物形式中的生态多样性.
主要方法:
- 对化石遗骸的骨分析.
- 牙科形态检查. 牙科形态检查.
- 与其他docodontan化石进行比较分析.
主要成果:
- 新的化石显示了适应登的骨特征.
- 牙的特征表明,他吃的是包括植物汁液在内的全食饮食.
- 这扩大了已知的运动器乐谱的docodontans包括树木活动.
- 这表明,在一些docodontans中,有显著的草食饮食成分,与以前已知的动物食饮食形成鲜明对比.
结论:
- 早期的哺乳动物形式,特别是docodontans,显示了比以前理解的更广泛的生态和饮食策略.
- 这一发现突显了早期哺乳动物类的更大的分类学和生态多样性.
- 这些发现挑战了以前关于多科多坦生物生态专业化的假设.
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