A phylogenetic principal-component analysis (PCA) represents the projection of the Dinosauria supertree (STAR Methods) into a PCA of climatic variables. PC1 axis shows strong positive correlation with maximum temperature (↑temp max), low positive correlation with precipitation seasonality (precip season), strong negative correlation with minimum temperature (↓temp min), and strong negative correlation with minimum precipitation (↓precip min). PC2 axis shows strong positive correlation with minimum temperature (↑temp min) and negative correlation with precipitation seasonality (↓precip season). Shadows around points highlight the relative density in the principal component space of non-dinosaurian Dinosauromorpha (gray), Ornithischia (blue), Sauropodomorpha (green), and Theropoda (red).
