1. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); División Paleontología de Vertebrados; Museo de La Plata; Paseo del Bosque s/n; 1900 La Plata Argentina
2. Evolutionary Studies Institute; Centre of Excellence in Palaeosciences; University of the Witwatersrand; Private Bag 3 Johannesburg Gauteng 2050 South Africa
3. Biological Sciences Department; University of Cape Town; Private Bag Rondebosch Cape Town South Africa
4. CONICET; Museo Paleontológico Egidio Feruglio; Av. Fontana 140 9100 Trelew Argentina
5. NRF/Centre of Excellence in Palaeosciences; University of the Witwatersrand; Private Bag 3 Johannesburg Gauteng 2050 South Africa