Triceratops - Cretaceous Period. Triceratops was the most numerous of the horned cretaceous dinosaurs as well as the largest ceratopsian; it was one of the last to become extinct. Its name means "three horned face". Triceratops was a herbivore and its largest predator was Tyrannosaurus rex.
It may have acted as a radiator, helping Triceratops regulate its body temperature. This ceratopsian, or horned dinosaur, was one of the last dinosaurs in the late Cretaceous period. It lived just before the Cretaceous-Tertiary extinction 65 million years ago.Sep 10, 2010