Fig. 2
From: Wonky whales: the evolution of cranial asymmetry in cetaceans
Principal components 1 and 2 for full data set (n = 172, including 10 terrestrial artiodactyls). Circle size size reflects the sum radii in the skull for each specimen (∑pspec), with larger circles indicating higher ∑pspec. A morphospace labelled with a specimen key is provided in the Additional file 1: Fig. S5—principal components plot with PC1 and PC2 plotted for each specimen. Silhouettes are from Phylopic with credit attributed to Chris Huh and used under the Creative Commons Licence [30]