1. Department of Earth & Environmental Sciences, University of Michigan, 1105 North University Ave, Ann Arbor, Michigan
48109-1382, USA
2. Museum of Paleontology, University of Michigan, 3102 Biological Sciences Building, Ann Arbor, Michigan
48109-1382, USA
3. Elevation Science Institute for Natural History Exploration, PO Box 672, Red Lodge, Montana
59068, USA