Figure 2.

Distribution of the selected taxa in the morphospace of inner ears plotted against the first three principal components (ordinary PCA). Note how Dinilysia (black dot) occupies a position on the periphery of the main cluster in all plots. (a) PC2 plotted against PC1; (b) PC3 plotted against PC1; (c) PC2 plotted against PC3. Diagrams to the right are projections of the Procrustes landmark configurations towards the positive and negative extremes of each axis; all projections are in lateral view, anterior to the right. Orange colour indicates fossorial (s.l.) taxa; cyan indicates semi-aquatic taxa; blue indicates fully aquatic taxa; green indicates arboreal taxa; and red indicates generalist taxa. The names of the taxa that are closest to Dinilysia in each plot are shown; for all other taxa see electronic supplementary material S4, table S2, where species names are provided for all numbers.