两只罗纪足恐龙的子姿势和食习惯
1Computer and Information Science, University of Oregon, Eugene, OR 97403, USA. Biological Sciences, Northern Illinois University, DeKalb, IL 60115, USA.
Science (New York, N.Y.)
|April 30, 1999
概括
数字重建显示Diplodocus和Apatosaurus的子比想象中的灵活性要小,这表明它们在地面上食. 这些长的恐龙很可能在低处浏览,而不是高处浏览,挑战以前的假设.
科学领域:
- 古生物学的古生物学
- 生物力学 生物力学
- 脊椎动物动物学 脊椎动物动物学
背景情况:
- 类恐龙,特别是像Diplodocus和Apatosaurus这样的Diplodocids,拥有异常长的子.
- 以前的假设表明,这些长子有助于在高处浏览,达到高层植被.
- 赛罗波德子的生物力学和功能形态学仍然是正在进行的研究和辩论的主题.
研究的目的:
- 为了数字重建Diplodocus和Apatosaurus的椎 (部) 脊椎.
- 为了确定他们的子的中立姿势和运动范围 (养包裹).
- 根据重建的宫姿势和灵活性推断养策略.
主要方法:
- 两种Diplodocid物种的宫柱的关节数字重建.
- 对与身体相对的中性,不偏斜的部姿势和头部位置的分析.
- 评估部的灵活性,包括侧面和背部 (向上) 曲能力.
主要成果:
- 对于Diplodocus和Apatosaurus,中性部姿势几乎是直的,轻轻地向下下降.
- 由于子和头部的角度,头部被放置在接近地面的中立姿势中.
- 子的灵活性低于传统的描述;Diplodocus显示的侧向和背部的移动性比阿帕托索鲁斯少.
结论:
- 重建的宫姿势和有限的灵活性表明适应地面养或低浏览.
- 这些发现挑战了传统的观点,即Diplodocid sauropods是高级浏览器.
- 这项研究为大草食恐龙的生态角色和食行为提供了新的见解.
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