延长的生长和扩展的亚成年发育在Tyrannosaurus rex物种复合体中,通过扩展的组织学采样和统计建模揭示了扩展的组织学采样和统计建模
Holly N Woodward1, Nathan P Myhrvold2, John R Horner3
1Department of Anatomy and Cell Biology, Oklahoma State University Center for Health Sciences, Tulsa, Oklahoma, United States.
PeerJ
|January 19, 2026
概括
关于龙的新研究表明,它的生长速度比以前想象的要慢,寿命也比以前想象的要长. 这项研究分析了多个个体的骨组织学,揭示了这个标志性的恐龙的逐渐成熟过程.
科学领域:
- 古生物学的古生物学
- 脊椎动物古生物学 脊椎动物古生物学
- 恐龙组织学 恐龙组织学
背景情况:
- 泰龙龙王 (T. rex) 是一个标志性的非飞行类恐龙,是古生物学研究的核心.
- 以前的T. rex生长模型依赖于有限的组织学数据,可能导致生长速度和寿命的不准确估计.
- 缺乏早期生长阶段的标本阻碍了对T. rex本体发生的全面理解.
研究的目的:
- 为了进行迄今为止最全面的Tyrannosaurus本体生成组织学分析.
- 通过结合新的数据和统计方法来完善T. rex的生长模型.
- 为了研究龙王种复杂的生长动态和寿命.
主要方法:
- 对于17个泰兰诺osaurus个体的股骨和骨的横截面截面的组织学分析.
- 测试四种替代的统计模型来解释生长标记,包括在交叉偏光下可见的模型.
- 使用术语"Tyrannosaurus rex物种综合体"由于物种内部的形态变异性.
主要成果:
- 最好支持的统计模型显示较低的最大生长率和延迟达到非对称尺寸 (35-40年).
- 两个未成熟的标本被发现与主要生长系列在统计上不相容.
- 包括所有可见的生长标记,包括可见的双重和交叉偏光标记,改进的模型适合.
结论:
- 铁龙公的复杂物种表现出比以前估计的更渐进的生长和更长的寿命.
- 在T. rex. 中出现了长期的亚成年发育期.
- 该研究的方法论为其他灭绝的种群中的骨年代学提供了意义.
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