Talking Triceratops repeats everything you say with a funny voice. Triceratops is a genus of herbivorous ceratopsid dinosaur that first appeared during the late Maastrichtian stage of the late Cretaceous period, about 68 million years ago in what is now North America. Individual Triceratops are estimated to have reached about 7. 9 to 9. 0 m in length, 2. 9 to 3.