1. Department of Biological Sciences and Advanced Environmental Research Institute, University of North Texas, Denton, TX 76201, USA.
2. Small Mammal Specialist Group Chinchilla Species Coordinator, Gainesville, FL 32605, USA.
3. Colección Boliviana de Fauna, Instituto de Ecología, Carrera de Biología, Universidad Mayor de San Andrés, La Paz, Bolivia.
4. Bioamérica Consultores, Santiago, Chile.
5. Department of Biological Sciences and Director of the International Center for Arid and Semiarid Land Studies, Texas Tech University, Lubbock, TX 79409, USA.
6. Department of Biology, Sciences Faculty, University of Tarapacá, Arica, Chile.