1. Research and Exhibitions Department, Iziko Museums of South Africa, Cape Town, South Africa
2. Department of Biological Sciences, University of Cape Town, Palaeobiological Research Group, Cape Town, South Africa
3. Departamento de Ciencias de la Tierra and Instituto Universitario de Investigación en Ciencias Ambientales de Aragón (IUCA), Universidad de Zaragoza, Zaragoza, Spain
4. Departamento de Paleobiología, Museo Nacional de Ciencias Naturales-CSIC, Madrid, Spain