What species of horse was coeval with North America's earliest humans in the Paisley Caves?

<p>SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at <a href="http://www.tandfonline.com/UJVP" target="_blank">www.tandfonline.com/UJVP</a></p> <p>Citation for this article: McHorse, B. K., E. Byrd Davis, E. Scott, and D. L. Jenkins. 2016. What species of horse was coeval with North America's earliest humans in the Paisley Caves? Journal of Vertebrate Paleontology. DOI: 10.1080/02724634.2016.1214595.</p>