1. Department of Vertebrate Zoology; National Museum of Natural History; Smithsonian Institution; Washington DC USA
2. Department of Paleobiology; National Museum of Natural History; Smithsonian Institution; Washington DC USA
3. Canadian Museum of Nature; Ottawa ON Canada
4. Departments of Mammalogy and Paleontology; Burke Museum of Natural History and Culture; Seattle WA USA
5. Department of Geology; University of Otago; Dunedin New Zealand