and Koutalisaurus (probable synonym of Pararhabdodon). The position of Tsintaosaurus in the evolutionary tree according to a 2013 study by Prieto-Márquez e.a. is indicated by this cladogram: Paleoecology A study of dinosaur eggs in successive layers of the Wangshi Series of Shandong province, of which the Jingangkou Formation is the most recent layer, shows that the region was one of high dinosaur diversity and that the climate had become drier from the preceding Jiangjunding Formation. See also Timeline of hadrosaur research References Late Cretaceous dinosaurs of Asia Fossil taxa described in 1958 Lambeosaurines Taxa named by Yang Zhongjian Ornithischian genera