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dc.contributor.authorDemar, David G.
dc.contributor.authorConrad, Jack L.
dc.contributor.authorHead, Jason J.
dc.contributor.authorVarricchio, David J.
dc.contributor.authorWilson, Gregory P.
dc.date.accessioned2017-09-13T14:25:50Z
dc.date.available2017-09-13T14:25:50Z
dc.date.issued2017-01
dc.identifier.citationDeMar Jr DG, Conrad JL, Head JJ, Varricchio DJ, Wilson GP. 2017 A new Late Cretaceous iguanomorph from North America and the origin of New World Pleurodonta (Squamata, Iguania). Proc. R. Soc. B 284: 20161902.en_US
dc.identifier.issn1471-2954
dc.identifier.urihttps://scholarworks.montana.edu/xmlui/handle/1/13640
dc.description.abstractIguanomorpha (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.en_US
dc.titleA new Late Cretaceous iguanomorph from North America and the origin of New World Pleurodonta (Squamata, Iguania)en_US
dc.typeArticleen_US
mus.citation.issue1847en_US
mus.citation.journaltitleProceedings of the Royal Society B: Biological Sciencesen_US
mus.citation.volume284en_US
mus.identifier.doi10.1098/rspb.2016.1902en_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.departmentEarth Sciences.en_US
mus.relation.universityMontana State University - Bozemanen_US
mus.data.thumbpage4en_US


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