1. Centre de Recherche en Paléontologie – Paris (CR2P, UMR 7207), (CNRS, MNHN, Sorbonne Université), Muséum national d'Histoire naturelle, case postale 38, 57 rue Cuvier, F-75231 Paris cedex 05 (France) and Max Planck Institute for Evolutionary Anthropo
2. National Museum of Natural History, Bulgarian Academy of Sciences, Tsar Osvoboditel 1, 1000 Sofia (Bulgaria)