Artwork showing the relative scale of humans and Styracosaurus. Meaning 'spiky lizard', Styracosaurus is a smaller member of the groud of dinosaurs called ceratopsians, which includes Tricratops, Pentaceratops and Torosaurus. Styracosaurus was substantially shorter than Triceratops, at 5.5 m (18 ft) in length, and lived in similar places (North America) but nearly 10 million tears earlier.