Fig 1. Familial level relationships of skinks based on Hedges [11] and percentage of species osteologically examined within each lineage.

Light gray = Lygosomoidea; Medium gray = Scincoidea; Dark gray = Acontoidea. The piecharts illustrate the relative percentage of species that have been cranially described within each family (see S1 Appendix). No skull anatomy descriptions currently exist for ristellids or ateuchosaurids. The ratio below each piechart represents the number of species osteologically examined out of the total number of species within each family (total numbers [10]).