Triceratops: The Three-Horned Dinosaur Who were they? Triceratops, meaning a three-horned face, was a dinosaur genus belonging to the Cretaceous Period about 3 million years ago. The dinosaur was identified by the frill bone structure on the back of its skull and the three horns. Triceratops was one of the few non-avian genera of dinosaurs in the later stages, probably the reason for the high demand for Triceratops tooth for sale.
Where did they belong? Fossils from the Cretaceous Period, especially those belonging to Triceratops, were found in the western North American region. This discovery also led to recognizing several species out of which only two- T. horridus and T. prorsus- could find validity. Were they big?