Figure 4.

Hypothesis testing framework for comparing heat maps. The heat maps of three alternative resolutions were compared for each of two different clades (a and b) through randomization tests. Previous studies supporting each alternative resolution are indicated as follows: “Barrow” is Barrow et al. (2014), “Lemmon” is Lemmon et al. (2007a,b), and “Duellman” is Duellman et al. (2016). For both clades, the leftmost resolution was strongly favored () as shown in Figure 3.