Parasaurolophus are absent. Panoplosaurus, which was found above the contact, is from layers just younger than those bearing Edmontonia, but still corresponding to the upper portion of the older MAZ-1, and would have coexisted with the ankylosaurid Euoplocephalus, ceratopsids Centrosaurus and Chasmosaurus belli, and hadrosaurids Corythosaurus intermedius, Lambeosaurus lambei, Lambeosaurus clavinitialis, and Parasaurolophus. As well as herbivorous megafauna, unnamed ornithopods, the primitive ceratopsian Unescoceratops and the pachycephalosaurians Stegoceras validum, Stegoceras sternbergi and Stegoceras brevis are known from the Dinosaur Park Formation, though their stratigraphic correlations are uncertain. Among theropods, the dromaeosaurids Dromaeosaurus and Saurornitholestes are known, the former from a single specimen of uncertain provenance, and the latter from many specimens such as teeth throughout the entire formation, and troodontids from the MAZ-1 are limited to Stenonychosaurus. Three genera of oviraptorosaurs are known, all of which likely coexisted in the Dinosaur Park Formation, Caenagnathus, Chirostenotes and Citipes. It is possible that a therizinosaur was present based on a single frontal bone, and three ornithomimosaurs are preserved in the MAZ-1, Rativates, Ornithomimus, and Struthiomimus. The only large theropod to coexist with Panoplosaurus was the tyrannosaurid Gorgosaurus, although an unnamed species of Daspletosaurus was present in deposits slightly younger than known for Panoplosaurus. References See also Timeline of ankylosaur research Nodosaurids Late Cretaceous dinosaurs of North America Fossil taxa described in 1919 Taxa named by Lawrence Lambe Dinosaur Park fauna Paleontology in Alberta Campanian genus first appearances Campanian genus extinctions Ornithischian genera