TRAYLER, Robin1, BARGO, M. Susana2, CUITIÑO, José3, KAY, Richard4, KOHN, Matthew J.5, SCHMITZ, Mark D.6, STROMBERG, Caroline A.E.7 and VIZCAÍNO, Sergio2, (1)Life and Environmental Sciences, University of California Merced, Merced, CA 95343, (2)División Paleontología de Vertebrados, Museo de La Plata, Unidades de Investigación, (CIC and CONICET), La Plata, Argentina, (3)Instituto Patagónico de Geología y Paleontología, CENPAT‐ CONICET, Puerto Madryn, Argentina, (4)Department of Evolutionary Anthropology, Duke University, Durham, NC 27708, (5)Department of Geosciences, Boise State University, 1910 University Drive, Boise, ID 83725-1535, (6)Department of Geosciences, Boise State University, Boise, ID 83725, (7)Department of Biology, University of Washington, 253 LSB, Box 351800, Seattle, WA 98195-1800