 The conclusion was that in the eastern lineage comprising "Zalmoxes" and "Mochlodon", the size ranges of both were too close to that of the ancestral rhabdodontid to support the hypothesis of nanism.Ösi and colleagues instead came to the conclusion that "Rhabdodon" in the western lineage is a case of gigantism in the group Rhabdodontidae.Rhabdodontids and Nodosaurids were overtaken by Hadrosaurids as the dominating herbivorous dinosaur group during the Maastrichtian period, 72.1–66.0 million years ago, of the Late Cretaceous.