 Corythosaurus casuarius is widespread throughout the lower unit of the Dinosaur Park Formation . In it , Corythosaurus was found to be closely associated with the ceratopsid Centrosaurus apertus . Their associating was found in the Dinosaur Park , Judith River , and Mesaverde formations , and also in the Wind River Basin and the Wheatland County area . Corythosaurus lived alongside numerous other giant herbivores , such as the hadrosaurids Gryposaurus and Parasaurolophus , the ceratopsids Centrosaurus and Chasmosaurus , and ankylosaurids Scolosaurus , Edmontonia and Dyoplosaurus in the earliest stages of the formation , Dyoplosaurus , Panoplosaurus and Euoplocephalus in the middle age , and Euoplocephalus alone in later stages of the formation . Studies of the jaw anatomy and mechanics of these dinosaurs suggests they probably all occupied slightly different ecological niches in order to avoid direct competition for food in such a crowded eco @-@ space . The only large predators known from the same levels of the formation as Corythosaurus are the tyrannosaurids Gorgosaurus libratus and an unnamed species of Daspletosaurus . 
 Corythosaurus casuarius <a href='drop_aux' title='1'><mark>is</mark></a>widespread throughout the lower unit of the Dinosaur Park Formation . In it , Corythosaurus was found to be closely associated with the ceratopsid Centrosaurus apertus . Their associating was found in the Dinosaur Park , Judith River , and Mesaverde formations , and also in the Wind River Basin and the Wheatland County area . Corythosaurus lived alongside numerous other giant herbivores , such as the hadrosaurids Gryposaurus and Parasaurolophus , the ceratopsids Centrosaurus and Chasmosaurus , and ankylosaurids Scolosaurus , Edmontonia and Dyoplosaurus in the earliest stages of the formation , Dyoplosaurus , Panoplosaurus and Euoplocephalus in the middle age , and Euoplocephalus alone in later stages of the formation . Studies of the jaw anatomy and mechanics of these dinosaurs <a href='uninflect' title='2'><mark>suggests</mark></a> they probably all occupied slightly different ecological niches in order to avoid direct competition for food in such a crowded eco @-@ space . The only large predators known from the same levels of the formation as Corythosaurus <a href='drop_aux' title='3'><mark>are</mark></a>the tyrannosaurids Gorgosaurus libratus and an unnamed species of Daspletosaurus . 
Corythosaurus casuarius widespread throughout the lower unit of da Dinosaur Park Formation . In it , Corythosaurus was found to b closely associated w/ the ceratopsid Centrosaurus apertus . Their associating was found in the Dinosaur Park , Judith River , and Mesaverde formations , and also in tdaWind River Basin and the Wheatland County area . Corythosaurus lived alongside numerous other giant herbivores , such as thdaadrosaurids Gryposaurus and Parasaurolophus , thedaratopsids Centrosaurus and Chasmosaurus , and ankylosaurids Scolosaurus , Edmontonia and Dyoplosaurus in the daliest stages of the formation , Dyoplosaurus , Panoplosaurus and Euoplocephalus in the middle age , and Euoplocephalus alone in later stages of the formation . Studies of the jaw anatomy and mechanics of these dinosaurs suggest they deff alll occupied slightly different ecological niches in order to avoid direct competition fir food in such a crowded eco @-@ space . The only bigass predators known from the sda levels of the fodation as Corythosaurus the tyrannosaurids Gorgosaurus libratus and an unnamed species of Daspletosaurus .