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适应性还是不适应性? 在微型化日间甲的辐射中,头骨的演变

Javier Lobón-Rovira^1,2, Jesus Marugán-Lobón^3,4, Sergio M Nebreda^3,4

¹CIBIO Centro de Investigação em Biodiversidade e Recursos Genéticos, Universidade do Porto, Rua Padre Armando Quintas, Campus de Vairão, Vairão, 4485-661, Portugal. j.lobon.rovira@cibio.up.pt.

BMC ecology and evolution

|December 28, 2024

概括

微型化Lygodactylus海显示低头骨形状的变化,表明广泛的同质化. 这些的物种化很可能是由非适应性过程驱动的,比如,而不是生态适应.

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.
类学类学类学类学

背景情况:

(Lygodactylus geckos) 是一种在非洲,马达加斯加和南美洲发现的微型的多样群体.
尽管有多样化,但物种表现出高度的形态相似性和广泛的同质性,使进化驱动器变得神秘.
了解头骨形状的变化是解读这种辐射中的物种化模式的关键.

研究的目的:

为了研究Lygodactylus geckos.的头骨元素 (头骨,下巴,内耳) 形状变化.
探索全量学,植物学和生态适应对头骨形态学的影响.
测试关于Lygodactylus物种化驱动因素的假设.

主要方法:

在Lygodactylus标本的计算机断层扫描 (CT) 上利用了3D几何形态测量.
应用了遗传学比较方法来分析形状变化.
检查的样本包括几乎所有公认的Lygodactylus种类.

主要成果:

在地理区域,宏观息地和生活方式中,头骨和内耳形状的变化很低,这表明了显著的同质化.
异构测量强烈影响内和跨物种水平上的变异,这表明微型化的约束.
非全度变异是独立于族系和生态的,可能反映出发育性可塑性.

结论:

在Lygodactylus geckos的物种化似乎在很大程度上与非适应性假设一致.
替代过程,而不是生态适应,被认为是物种化的主要驱动因素.
发育可塑性可能在观察到的形态模式中发挥重要作用.

关键词:

这就是Lygodactylus.一个全度测量法.电脑图像扫描 (CT-scan) 的使用情况.科科科科科的科科科科几何形态仪表的几何形态仪表.内耳是指内耳的内部部分.头骨的头骨是一个人.斯克瓦马塔 (Squamata) 是一个小队.

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