1. Faculty of Earth Science, Geography and Astronomy Department of Palaeontology University of ViennaGeozentrum Vienna Austria
2. Dipartimento di Scienze della Terra Università degli Studi di Torino Torino Italy
3. Centro de Investigación en Recursos Naturales y Sustentabilidad Universidad Bernardo O'Higgins Santiago Chile
4. Paleontological Institute and Museum University of Zurich Zurich Switzerland