BackgroundFour main dinosaur sites have been investigated in latest cretaceous deposits from the Amur/Heilongjiang Region: Jiayin and Wulaga in China (Yuliangze Formation). Blagoveschensk and Kundur in Russia (Udurchukan Formation). More than 90% of the bones discovered in these localities belong to hollow-crested lambeosaurine saurolophids. but flat-headed saurolophines are also repr... https://foldlyers.shop/product-category/electronic-drum-kits/