测试了在澳门牙牙上尖发育的模式级联模型
Simon A Chapple1, Tanya M Smith2, Matthew M Skinner3
1School of Anthropology and Conservation, University of Kent, Canterbury CT2 7NZ, United Kingdom.
Archives of oral biology
|August 15, 2024
概括
模式级联模型 (PCM) 广泛解释了M2s中的辅助尖端变化,具有较大的牙和与辅助尖端存在相关的中央主尖端. 然而,PCM并没有考虑所有观察到的顶峰模式.
科学领域:
- 灵长类古生物学
- 发育生物学是发展生物学.
- 几何形态仪表的几何形态仪表.
背景情况:
- 摩尔顶数对于灵长类系统学和推断家族遗传关系至关重要.
- 发育机制,如模式级联模型 (PCM),可以解释骨尖端的形成.
- 该PCM建议早期的尖端发展决定了晚些时候的尖端存在和定位.
研究的目的:
- 测试 Macaca fascicularis下第二 (M2s) 的辅助尖端变化是否与PCM预测一致.
- 为了研究质 - 牙结 (EDJ) 形状和辅助尖顶存在之间的相关性.
主要方法:
- 微型计算机断层扫描 (micro-CT) 对13种M2s. Macaca fascicularis的成像.
- 对EDJ形状变化应用的几何形态学.
- 对辅助尖端存在的分析,与大小和尖端高度相关.
主要成果:
- M2s中的辅助尖端图案在很大程度上与PCM一致.
- 带有辅助尖端的牙较大,并且相对尖端高度较短.
- 外围尖顶形成与更中心位置的初级尖顶相关.
结论:
- 在PCM提供了一个合适的框架,以了解在 Macaca fascicularis 牙的尖端变化.
- PCM并不能完全解释样本中所有辅助尖顶表达的情况.
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