FIGURE 4 in Morphospace dynamics and intraspecies variety of Sorex araneus and S. tundrensis according to recent and fossil data

FIGURE 4. Results of the principal component analysis based on the m1 shape. The tooth data set represented three repetitions of four samples within space of PC1 and PC2: SeV, SeF, SeH and PtU. A, PCA result (PC1 vs. PC2). B1, m1 shape in a transformation frame on the negative end of PC1. B2, ibid., on the positive end of PC1. B3, ibid., on the positive end of PC2. B4, ibid., on the negative end of PC2. C1, Simulation of the buccal inclination of the 3D-model during an image acquisition that partly corresponds to the shape variation along of PC1 (X-state). C2, Simulation of the lingual inclination of the 3D-model during an image acquisition (Y-state). C3, Consensus position (correct for image acquisition) of m1. D, Diagrammatic image of the maximal variance disparity definition among three repetitions. Key: a, MEr trajectory between repeats of the Serov race samples; b, MEr trajectory between repeats of the Pechora race sample; c, d, opposite swinging of the 3D-model during the image acquisition; R, repetition; i–vii, differences (see the main text).