1. CONICET, Área de Paleontología, Fundación de Historia Natural Félix de Azara, CEBBAD, Universidad Maimónides, Hidalgo 775, 1405 Buenos Aires, Argentina.
2. Department of Biological Sciences, University of Alberta, Edmonton, Alberta T6G 2E9, Canada.
3. College of Science and Engineering, Flinders University, Adelaide, SA 5042, Australia.
4. Earth Sciences Section, South Australian Museum, North Terrace, Adelaide, SA 5000, Australia.
5. CONICET, Departamento de Biodiversidad y Biología Experimental/Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina.
6. Arizona College of Osteopathic Medicine, Midwestern University, 19555 N. 59th Ave., Glendale, AZ 85383, USA.
7. Redpath Museum, McGill University, 859 Sherbrooke Street W., Montreal, Quebec H3A 0C4, Canada.
8. Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E9, Canada.