Head shape evolution in Gymnophthalmidae: does habitat use constrain the evolution of cranial design in fossorial lizards?
Head shape evolution in Gymnophthalmidae: does habitat use constrain the evolution of cranial design in fossorial lizards?
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DOI：
10.1111/j.1420-9101.2011.02372.x
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发表时间：
2011-11-01
影响因子：
2.1
通讯作者：
Kohlsdorf, T.
中科院分区：
文献类型：
--
作者：
Barros, F. C.;Herrel, A.;Kohlsdorf, T.
栖息地利用包括生态参数和生物能力之间的相互作用，当相同的形态结构被招募用于不同的活动时，最终在进化规模上决定此类过程结果的选择压力可能会发生冲突。在这里，我们研究了饮食和运动在裸眼蜥蜴颅骨设计进化中的作用，并检验了微生境的使用驱动头部形状进化的假设，特别是对于头先入穴的动物。使用传统和系统发育方法分析与连续生态指数（猎物硬度和基质致密性）相关的形态因素。结果表明，裸眼科动物头部形态的进化是在微生境使用而不是饮食的影响下形成的：穴居动物的头部较短，吻部角度较低，与所消耗的猎物无关。在整个群体的系统发育过程中，食物偏好似乎相对保守，这可能使得裸眼类动物广泛辐射到化石微生境中。
Habitat usage comprises interactions between ecological parameters and organismal capacities, and the selective pressures that ultimately determine the outcome of such processes in an evolutionary scale may be conflicting when the same morphological structure is recruited for different activities. Here, we investigate the roles of diet and locomotion in the evolution of cranial design in gymnophthalmid lizards and test the hypothesis that microhabitat use drives head shape evolution, particularly in head-first burrowers. Morphological factors were analysed in relation to continuous ecological indexes (prey hardness and substrate compactness) using conventional and phylogenetic approaches. Results suggest that the evolution of head morphology in Gymnophthalmidae was shaped under the influence of microhabitat use rather than diet: burrowers have shorter heads with lower rostral angulation, independently of the prey consumed. Food preferences appear to be relatively conserved throughout the phylogeny of the group, which may have permitted the extensive radiation of gymnophthalmids into fossorial microhabitats.