Allometry and interspecific differences in the facial cranium of two closely related macaque species.
Allometry and interspecific differences in the facial cranium of two closely related macaque species.
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DOI：
10.1155/2011/849751
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Takai M
中科院分区：
文献类型：
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作者：
Ito T;Nishimura T;Takai M
从化石证据来解释猕猴的进化史是很困难的，因为它们身体大小的进化波动可能已经在每个谱系中消除或形成了不同的重要形态特征。我们采用几何形态计量学研究了两个近亲——束状猕猴（Macaca fascicularis）和褐毛猕猴（M. fuscata）——颅面形状的异速生长轨迹。这两个物种在前脸的超下颌偏转中表现出单一的共享异速发育轨迹，表明该特征的差异可以通过大小变化来解释。相比之下，颅面突出显示了两个平行的轨迹，表明即使它们在大小上相当，fuscata m.s an face比m.s fasicularis有一个更高和更短的脸。面部突出的程度很可能是在束状肌组的种系评价的一个关键特征。这种对不同猕猴的分析将有助于解决关于猕猴化石的种系解释的争议。
Interpreting evolutionary history of macaque monkeys from fossil evidence is difficult, because their evolutionary fluctuations in body size might have removed or formed important morphological features differently in each lineage. We employed geometric morphometrics to explore allometric trajectories of craniofacial shape in two closely related species, Macaca fascicularis and M. fuscata. These two species exhibit a single shared allometric trajectory in superoinferior deflection of the anterior face, indicating that the differences in this feature can be explained by size variation. In contrast, two parallel trajectories are demonstrated in craniofacial protrusion, indicating that even if they are comparable in size, M. fuscata has a higher and shorter face than M. fascicularis. The degree of facial protrusion is most likely a critical feature for phyletic evaluation in the fascicularis group. Such analyses in various macaques would help to resolve controversies regarding phyletic interpretations of fossil macaques.