Fig. 9 in A practical, step-by-step, guide to taxonomic comparisons using Procrustes geometric morphometrics and user-friendly software (part B): group comparisons

Fig. 9. Divergent allometries and their effect on size-corrected shape. (a) PLS1 summarizing allometries (35% of variance in allometric predictions) vs CS. The vertical lines emphasize the scores of speciesspecific predicted allometric shapes for either the smallest mandible of all North American marmots (CS = 56 mm, emphasized with a vertical yellow line and arrows to show the extrapolations of the allometric trajectories to CS = 56 mm) or the mean CS of all species (CS = 77 mm, emphasized with a light grey vertical line). (b1) Scatterplot of bgPC1–2 (percentages of between group shape variance in parentheses) for the size-corrected shapes predicted using species-specific allometries (i.e., separate slopes) and CS = 56 mm as 'common' size. (b2, inset) Scatterplot of bgPC1–2 of size-corrected shapes using independent trajectories (as in b1) and CS = 77 mm: if differences in slopes were negligible, b1 and b2 should be almost identical.