DOI: 10.5061/dryad.tp802
title: Data from: A new Late Cretaceous iguanomorph from North America and the origin of New World Pleurodonta (Squamata, Iguania)

description: Iguanomorpha (stem + crown Iguania) is a diverse squamate clade with
 members that predominate many modern American lizard ecosystems. However,
 the temporal and palaeobiogeographic origins of its constituent crown
 clades (e.g. Pleurodonta (basilisks, iguanas, and their relatives)) are
 poorly constrained, mainly due to a meagre Mesozoic-age fossil record.
 Here, we report on two nearly complete skeletons from the Late Cretaceous
 (Campanian) of North America that represent a new and relatively
 large-bodied and possibly herbivorous iguanomorph that inhabited a
 semi-arid environment. The new taxon exhibits a mosaic of anatomical
 features traditionally used in diagnosing Iguania and non-iguanian
 squamates (i.e. Scleroglossa; e.g. parietal foramen at the frontoparietal
 suture, astragalocalcaneal notch in the tibia, respectively). Our
 cladistic analysis of Squamata revealed a phylogenetic link between
 Campanian-age North American and East Asian stem iguanomorphs (i.e. the
 new taxon + Temujiniidae). These results and our evaluation of the
 squamate fossil record suggest that crown pleurodontans were restricted to
 the low-latitude Neotropics prior to their early Palaeogene first
 appearances in the mid-latitudes of North America.
description: ESM Video 1_MOR 7042
 rollThis is a video of a
 three-dimensional model of the skull of Magnuviator ovimonsensis (MOR
 7042).ESM Video 2_MOR 7042
 yawThis is a video of a
 three-dimensional model of the skull of Magnuviator ovimonsensis (MOR
 7042).ESM Video 3_MOR 7042
 pitchThis is a video of a
 three-dimensional model of the skull of Magnuviator ovimonsensis (MOR
 7042).ESM Video 4_MOR 7042
 braincase rollThis is a video of a
 three-dimensional model of the braincase of Magnuviator ovimonsensis (MOR
 7042).ESM Video 5_MOR 7042
 braincase yawThis is a video of a
 three-dimensional model of the braincase of Magnuviator ovimonsensis (MOR
 7042).ESM Video 6_MOR 7042
 braincase pitchThis is a video of a
 three-dimensional model of the braincase of Magnuviator ovimonsensis (MOR
 7042).ESM Video 7_MOR 7042
 snout rollThis is a video of a
 three-dimensional model of the snout of Magnuviator ovimonsensis (MOR
 7042).ESM Video 8_MOR 7042
 snout yawThis is a video of a
 three-dimensional model of the snout of Magnuviator ovimonsensis (MOR
 7042).ESM Video 9_MOR 7042
 snout pitchThis is a video of a
 three-dimensional model of the snout of Magnuviator ovimonsensis (MOR
 7042).DeMar et al._ESM file
 S1This 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.DeMar et al_ESM file
 S1.pdfDeMar_et_al._ESM_file_S2This file contains two tables: Table 1 includes skull, snout-vent length, and total body length measurements of fossil lizards. Table 2 provides a range of snout-vent lengths for extant adult iguanians.