Figure 2 in The shape of water: adaptations of cochlea morphology in seals and oưers

Figure 2. PCA of cochlea shape in Caniformia. The shape analysis revealed a paưern of clustering along the axes, with highly terrestrial animals (mustelids, dogs, and foxes) primarily on the upper right quadrant and highly aquatic (Pinnipedia) on the leħ one. The two first PCs explain about 82% of the cochlea shape (PC1 = 53%, PC2 = 29%). The four phylogenetic groups of Pinnipedia + Ursidae and Lutrinae + Mustelinae are highlighted by shaded areas. For beưer visualization, thumbnails of animals with audiogram data have been placed at the respective position of the data point. For each investigated sample, data from the right cochlea was used for PC analysis (N = 52). Blue = aquatic and semi-aquatic animals, green = terrestrial animals; full circle = Pinnipedia and Ursidae, empty circle = Musteloidea and Lutrinae.