1. Evolutionary Studies Institute, University of the Witwatersrand, Johannesburg, South Africa
2. School of Geosciences, University of the Witwatersrand, Johannesburg, South Africa
3. Karoo Palaeontology, Iziko South African Museum, Cape Town, South Africa
4. Universidad Nacional de San Luis, Area de Zoología. Chacabuco 914, 5700 San Luis, Argentina
5. Geological Survey of Namibia, 6 Aviation Road, Windhoek, Namibia