Struthiomimus, skull Styracosaurus and Anatotitan

and Anatotitan

unlike rodents which have ever-growing teeth

These crowns are taller relative to diameter and more circular in cross section than any other member of the tyrannosaurid family Tinker's lower jaws hold a single nipping tooth and 12-13 tooth sockets per side

It is believed to be 1

a locality dated to the early Permian of about 296 million years ago

Struthiomimus, skull Styracosaurus and AnatotitanStruthiomimus (meaning "ostrich mimic", is a genus of ornithomimid dinosaurs from the late Cretaceous of North America. Ornithomimids were long legged, bipedal, ostrich like dinosaurs with toothless beaks. The type species, Struthiomimus altus, is one of the more common small dinosaurs found in Dinosaur Provincial Park in Alberta, Canada. Its abundance suggests that these animals were herbivores or omnivores rather than pure carnivores. The size of S.