Fig. 2: Correlation between centroid size and astragalus shape in ruminants.
A Regression analysis based on Procrustes coordinates and including all clades, where the log-transformed centroid size is plotted against the regression score which is a projection of the data points in shape space onto an axis in the direction of the regression vector78. The regression lines are indicated by clade. B Log-transformed centroid size as a function of regression score, pooled by clade, with each clade’s centroid size distribution centered on zero with its mean. Only pecoran ruminants are included here, since Tragulina has a different allometric trend. C Regression analysis based on Procrustes coordinates including extant ruminants only, where the log-transformed centroid size is plotted against regression score, with regression lines indicated by habitat. The virtual deformations along the regression line are represented by the warped model corresponding to the mean individual deformed to reach the shape of the maximal individual on the axis. The colors represent the intensity of the local shape difference between extreme individuals along the regression line. Red indicates a positive deviation of the maximal individual from the minimal individual, blue indicates a negative deviation, and light green indicates no deviation. Abbreviations: Ant. (Anterior); Post. (Posterior); Lat. (Lateral); Med. (Medial).
