1. School of Natural Resources, School of Biological Sciences, and Nebraska State Museum, University of Nebraska, Lincoln, NE, USA
2. Department of Zoology, Denver Museum of Nature and Science, Denver, CO, USA
3. Universidad Autónoma de Nuevo León, Facultad de Ciencias Biológicas, San Nicolás de los Garza, Nuevo León, Mexico
4. Burke Museum of Natural History and Culture, University of Washington, Seattle, WA, USA