DeMar et al._ESM file S1

This file contains supplementary text and 14 supplementary figures. The supplementary text provides (i) supplementary morphological descriptions; (ii) methodology on estimating squamate body-sizes; (iii) interpretations of the palaeoenvironmental setting of Magnuviator ovimonsensis and other relevant fossil iguanomorphs; (iv) new systematic interpretations of Late Cretaceous lizards previously assigned to Pleurodonta; (v) cladistic analysis methodologies and results; (vi) character scorings of Magnuviator ovimonsensis and Pariguana lancensis; (vii) information regarding CT and µCT scans; and (viii) a complete strict consensus tree and apomorphy list derived from our morphology-based cladistic analysis. The supplementary figures show additional specimen images, cladograms, and comparative body-size estimates of fossil and extant lizards. The text provides background information for interpretations made in the manuscript.