Department of Biology, George Washington University, Washington D.C., United States of America DOI 10.7717/peerj.17277 Academic Editor Kenneth De Baets Subject Areas Biodiversity, Evolutionary Studies, Paleontology, Zoology Keywords Biogeography, Squamata, Laurasia, Gondwana, Fossils, DEC, Jurassic, Lizards, Snakes Copyright © Licence This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution,...