根据最近的分类学修订,三指 (Dipodinae,Dipodidae,Rodentia) 的头骨差异
Bader H Alhajeri1, Zahraa Hasan1, Hasan Alhaddad1
1Department of Biological Sciences, Kuwait University, Safat, 13060, Kuwait.
Current zoology
|August 24, 2023
概括
几何形态学揭示了三鹿的明显的头骨形状,支持修订的分类学. 这些Dipodinae物种的形状差异与饮食和息地等生态因素相关.
科学领域:
- 动物学 动物学
- 比较解剖学的比较解剖学
- 进化生物学 进化生物学
背景情况:
- 最近的遗传学研究已经修订了三指 (Dipodinae亚系) 的分类学,将一些亚种提升为完整的物种地位.
- 了解这些分类学变化的形态后果对于进化学和生态学研究至关重要.
研究的目的:
- 用几何形态测量来比较二类头骨的尺度形状差异,考虑到修订后的分类学.
- 调查观察到的头骨形状变化的潜在生态解释.
主要方法:
- 应用了几何形态测量来比较不同物种和三指的亚种的骨形状差异.
- 分析考虑了共同的二重体和性二重体,在采样的头骨中没有发现显著的性二重体.
主要成果:
- 大多数操作分类学单位在头骨大小和形状上都显示出显著的差异.
- 像*Dipus*和*Stylodipus*这样的族群聚集在一起,而*Jaculus*种类表现出不同的特征,例如更大的耳球和更宽的大脑.
- *Jaculus loftusi*和*Jaculus hirtipes*,以前是同义词,表现出明显的头骨形状区别于*J. jaculus*和彼此,支持它们的分类学分离.
- *Dipus sagitta*亚种在形态上相似,但与不同的物种 *Dipus deasyi* 有所不同.
结论:
- 三指的形状变化与它们的修订分类学相一致,为物种区分提供了形态支持.
- 观察到的头骨差异可能与生态因素 (如饮食和基质偏好) 有关,需要进一步调查.
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