Supplementary background text, figures, and morphological and phylogenetic data used for interpretations in the main text from A new Late Cretaceous iguanomorph from North America and the origin of New World Pleurodonta (Squamata, Iguania)

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.