formation represents a fluvial environment, with the upper part of the formation being extensively reworked by a number of early Tertiary volcanic intrusions. Shanxia would have coexisted with the sauropod Huabeisaurus, the ornithopod Datonglong, the tyrannosauroid Jinbeisaurus and the ankylosaurid Tianzhenosaurus. See also Timeline of ankylosaur research References External links Ankylosaurids Late Cretaceous dinosaurs of Asia Fossil taxa described in 1998 Ornithischian genera