of Dyoplosaurus was recovered from the base of the Dinosaur Park Formation, which dates to the middle Campanian stage of the Late Cretaceous. The lower Dinosaur Park Formation consist primarily of dryland habitats with modified channel-fills that experienced impeded drainage in the lower horizons and were subject to frequent flooding while more distal reaches of the floodplain, flooding was less frequent. Dyoplosaurus would have coexisted with the ankylosaurs Edmontonia, Euoplocephalus, and Scolosaurus, the ceratopsid Chasmosaurus, the hadrosaurids Corythosaurus, Gryposaurus and Parasaurolophus, the tyrannosaurid Gorgosaurus, the dromaeosaurid Hesperonychus, the troodontid Latenivenatrix, and the caenagnathids Caenagnathus and Chirostenotes. See also Timeline of ankylosaur research References Ankylosaurids Late Cretaceous dinosaurs of North America Fossil taxa described in 1924 Taxa named by William Parks Dinosaur Park fauna Paleontology in Alberta Campanian genus first appearances Campanian genus extinctions Ornithischian genera