2018.05.11. On May 21, 2018 in the Institute of Paleobiology will be held lectures presented by Wiktor S. Tereszczenko (Laboratory of Paleoherpetology, Paleontological Institute, Russian Academy of Sciences):  On the polymorphism of the axial skeleton in Protoceratops andrewsi (Protoceratopidae, Neoceratopsia) and Justyna Słowiak (Instytut Paleobiologii PAN): Ontogenetic postural change in Protoceratops andrewsi and the implications for stem ceratopsian locomotion