TL;DR: In this article, the authors evaluated patterns of variation in external and internal cranio-facial morphologies among four phylogenetic groups of extant macaques (the fascicularis, sinica, silenus, and sylvanus groups), using computed tomography and multivariate analyses.
TL;DR: Body size of fossil macaque,Macaca anderssoni, was estimated using molar specimens compared morphometrically with those of M. arctoides, which were postlated to be associated with the glaciation happened at Pleistocene and the change of the landscape from Pleistsocene to present time in East Asian.
Abstract: In order to estimate body size of fossil macaque,Macaca anderssoni, the molar specimens ofM. anderssoni were compared morphometrically with those ofM. arctoides (includingM. thibetana),M. assamensis andM. mulattta. The multivariate analysis, Star Symbol Plots, demontrated that, compared to other macaque species, molar morphology ofM. anderssoni is more silmilar to that ofM. arctoides likelihood the reults relying on the morphologicla description. Based on the predictive equation derived fromM. arctoides, body weight ofM. anderssoni is 8.93±1.49 kg, which is significantly larger than it offspring,M. arctoides. The change of body size fromM. anderssoni toM. arctoides were postlated to be associated with the glaciation happened at Pleistocene and the change of the landscape from Pleistocene to present time in East Asian.