Figure of pPCA includes metrics we compiled for richness, elevational or biogeographical distributions of each family (n = 49), as well as latitudinal range and evolutionary age as estimated by Hawkins et al. 2011. CYMK colors of each family represent endemism to a given biogeographic region and proportion of species shared by all locations (cyan – Sahul, yellow – Wallacea, magenta – Sundaland, black – cosmopolitanism). Length and direction of arrows proportionate to loading significance.