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Patterns and Constraints of Craniofacial Variation in Colobine Monkeys: Disentangling the Effects of Phylogeny, Allometry and Diet
Evolutionary Biology ( IF 2.5 ) Pub Date : 2019-01-31 , DOI: 10.1007/s11692-019-09469-7 Ronan Ledevin , Daisuke Koyabu
Evolutionary Biology ( IF 2.5 ) Pub Date : 2019-01-31 , DOI: 10.1007/s11692-019-09469-7 Ronan Ledevin , Daisuke Koyabu
Leaf-eating monkeys (colobines) are a highly diversified subfamily with 61 species in ten genera, in which patterns and constraints of morphological evolution are still poorly resolved. In the present study, we measured the skulls of 452 specimens collected from different museums worldwide. Using one of the most extensive samples ever employed, and geometric morphometric techniques, we aimed to elucidate the evolutionary processes that have led to the craniofacial diversification of colobines. Our comprehensive analyses of the colobine cranium demonstrated that phylogeny is the first order signal to emerge, with clear interspecific patterns of differentiation. Allometric trend constrains shape variation for most colobine taxa, but to a lesser degree than phylogeny. We also confirmed that diet is significantly associated with the variation in cranial shape among colobines. In particular, the mechanical advantage of the masseter for biting at the anterior dentition is linked to seed intake. We postulate that such ecomorphological patterns explain, in part, the non-phylogenetic and non-allometric variations in the colobine skull, and indicate the importance of diet in interspecific resource partitioning, allowing for species coexistence.
中文翻译:
疣猴的颅面变异的模式和约束:区分系统发育,异速生长和饮食的影响
食叶猴(colobines)是一个高度多样化的亚科,共有十个属,共有61个种,在其中,形态演化的模式和约束仍然难以解决。在本研究中,我们测量了从世界各地不同博物馆收集的452个标本的头骨。我们使用有史以来使用最广泛的样本之一以及几何形态计量技术,旨在阐明导致颅骨颅面部多样化的进化过程。我们对头颅骨颅骨的综合分析表明,系统发育是出现的第一级信号,具有清晰的种间分化模式。异速生长趋势限制了大多数鸟颈类群的形状变异,但程度比系统发育程度要小。我们还证实饮食与colobines的颅骨形状变化显着相关。特别地,咬牙机在前牙的咬合的机械优势与种子的摄取有关。我们假设这种生态形态模式部分地解释了可乐宾头骨的非系统发育和非异形变异,并表明饮食在种间资源分配中的重要性,从而允许物种共存。
更新日期:2019-01-31
中文翻译:
疣猴的颅面变异的模式和约束:区分系统发育,异速生长和饮食的影响
食叶猴(colobines)是一个高度多样化的亚科,共有十个属,共有61个种,在其中,形态演化的模式和约束仍然难以解决。在本研究中,我们测量了从世界各地不同博物馆收集的452个标本的头骨。我们使用有史以来使用最广泛的样本之一以及几何形态计量技术,旨在阐明导致颅骨颅面部多样化的进化过程。我们对头颅骨颅骨的综合分析表明,系统发育是出现的第一级信号,具有清晰的种间分化模式。异速生长趋势限制了大多数鸟颈类群的形状变异,但程度比系统发育程度要小。我们还证实饮食与colobines的颅骨形状变化显着相关。特别地,咬牙机在前牙的咬合的机械优势与种子的摄取有关。我们假设这种生态形态模式部分地解释了可乐宾头骨的非系统发育和非异形变异,并表明饮食在种间资源分配中的重要性,从而允许物种共存。