Dinosaurs that lived at the same time and place as Triceratops
include the herbivores Edmontosaurus, Ankylosaurus, Torosaurus, and
Leptoceratops, and Thescelosaurus. Carnivores that co-existed with
Triceratops include Tyrannosaurus, Troodon, Pachycephalosaurus,
Struthiomimus, and Chirostenotes.