Papenfuss, Theodore J.Macey, J. RobertSchulte, James A., II2017-11-132017-11-132001-10-12Papenfuss, T. J., Macey, J. R., & Schulte, J. A. (2001). A new lizard species in the genus Xantusia from Arizona / by Theodore J. Papenfuss, J. Robert Macey and James A. Schulte II. Scientific Papers, (23), 1-9. doi:10.5962/bhl.title.162841094-0782https://hdl.handle.net/1808/25345Three species of lizards in the genus Xantusia occur in Arizona: X. vigilis, X. arizonae and a new species described here, X. bezyi. Previous workers have suggested that only a single species of Xa7itusia is found in Arizona with some populations living in yucca-type plants and others specializing in granite rock habitats. Recognition of the three species is based on previously reported allozyme data, new mitochondrial DNA sequence data (1716 aligned sites, 59 parsimony informative), and morphological differences. Phylogenetic analysis of mitochondrial DNA sequences among the three species of Xantusia that occur in Arizona indicate that X. arizonae and X. vigilis are sister taxa with the exclusion of X. bezyi. Genetic differentiation between mitochondrial DNA sequences suggests that species in Arizona are 5-6 million years old.This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.http://creativecommons.org/licenses/by-nc-sa/4.0/ReptiliaSquamataXantusiidaeXantusiaNew speciesSystematicsPhylogeneticsMitochondrial DNAArizonaArticle10.5962/bhl.title.16284openAccess