Dyoplosaurus acutosquameus

† Dyoplosaurus acutosquameus is an ankylosaur dinosaur from the Late Cretaceous (Campanian) Dinosaur Park Formation of Alberta, Canada. Estimated at around 6 m in length, it was a low-slung quadruped herbivore covered in sharply-keeled osteoderms (reflected in its species name, acutosquameus, 'sharp-scaled'). It wielded a bony tail club for defence against tyrannosaurids. For decades confused with Euoplocephalus, it was re-established as a distinct genus in 2009.