在Lissotriton新的肩膀和腰部的形态变化,模块化和整合
Aleksandar Urošević1, Sanja Budečević1, Katarina Ljubisavljević1
1Department of Evolutionary Biology, Institute for Biological Research "Siniša Stanković", National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia.
Journal of anatomy
|March 2, 2024
概括
新肢体的进化显示了肩和腰的多种模块化,受水生生活方式的影响. 形状的差异与环境因素和身体的强度有关,而不仅仅是族系.
科学领域:
- 进化生物学是进化的生物学.
- 比较解剖学的比较解剖学.
- 生物力学 生物力学
背景情况:
- 四足动物的四肢进化是由霍克斯基因和模块化组织驱动的.
- 运动进化与肢体形态多样化和共变模式有关.
- 尾状两动物表现出双相生活方式,在四肢骨架上面临着明显的环境压力.
研究的目的:
- 研究六种欧亚新物种近距离前肢的形态变异,差异,模块化和整合.
- 了解水生生物的持续时间和种系如何影响四肢骨形态.
- 检查与进化和功能假设相关的肩和腰的模块化.
主要方法:
- 用于高分辨率成像的计算机微断层扫描.
- 3D几何形态测量用于分析形状变化和整合.
- 遗传学信号分析以评估进化模式.
主要成果:
- 各种物种表现出显著的四肢形状差异,但在肩和腰形态上重叠,没有差异差异.
- 骨形状的变化与水生时期的持续时间 (长度,深度,曲率) 相关联.
- 肩膀的形状不受水生时期的影响,而是身体的强度;水生时期显示出家族遗传信号.
- 模块化有所不同,膀臂支功能模块化 (头骨/轴) 和Lissotriton vulgaris scapula显示前后模块化.
结论:
- 新的四肢模块化模式与一般四足动物的趋势保持一致,远部的模块化更大.
- 环境因素,如水生时间显著塑造特定的肢体元素 (骨).
- 未来的研究应该扩大种类和生命阶段,以充分理解四肢进化驱动因素.
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