Figure 2.

Phylogenetic relationships among Phrynosoma and the closely related species Callisaurus draconoides, Uma notata and Sceloporus magister, as described by Pyron et al. (2013). Illustrated are the results of an ancestral character state reconstruction performed in Mesquite for the proportion of ants in the diet. Note that the ancestor of Phrynosoma had about 45% ants in its diet, a proportion gradually increasing with the evolution of the different species. A notable exception is the clade comprising P. orbiculare, P. ditmarsi and P. hernandesi, showing a secondary reduction in the proportion of ants in the diet.