Some examples include:

Triceratops: a large, herbivorous dinosaur with three horns on its head and a bony frill.
Ankylosaurus: a heavily-armored herbivorous dinosaur with a club-like tail and a bony shell covering its body.
Edmontosaurus: a large herbivorous dinosaur with a duck-like bill and a toothless beak.
Pachycephalosaurus: a herbivorous dinosaur with a thick, bony dome on its head that it likely used for head-butting.
Parasaurolophus: a herbivorous dinosaur with a distinctive crest on its head that may have been used for communication or display. 
It is important to note that the T. Rex lived near the end of the Cretaceous period and was one of the last dinosaurs to go extinct before the mass extinction event that marked the end of the age of dinosaurs.
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