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. 2015 Nov 2;15:239. doi: 10.1186/s12862-015-0521-z

Fig. 3.

Fig. 3

Principal component analysis of cranial (a) and mandibular (b) shape variation in juvenile and adult bear species. Ellipses represent the 95 % confidence interval of the species and age stages. Cranial and mandibular models represent extreme shape on PC1 and PC2