1. Smithsonian Tropical Research Institute Ancón Panamá
2. Universidad Nacional de Colombia Medellín Colimbia
3. Facultad de Ciencias Naturales Universidad del Rosario Bogotá Colombia
4. Department of Geology and Geophysics Missouri University of Science and Technology Rolla MO USA
5. Museum of Paleontology and Department of Earth and Environmental Sciences University of Michigan Ann Arbor MI USA
6. Department of Geosciences Boise State University Boise ID USA
7. Corporación geológica ARES Bogotá Colombia