FIGURE 5.

Variation of molar shape with weight (cubic root). Shape is represented by scores on PC1. (a) Upper molar row. (b) First upper molar. (c) Truncated first upper molar. Next to each graph, visualization of the deformation from minimum to maximum scores along PC1. In blue compression and in red expansion. Significant associations are represented with regression lines (green, Balan W; blue, Balan L). Swiss mice (in red) are represented but not included in the regressions [Colour figure can be viewed at wileyonlinelibrary.com]