Chasmosaurus sp. (75 million years ago) Monoclonius lived at the same time. However, it also lived some millions of years before the emergence of the successful allosauroids, being of the more primitive four fingered Ceratosauria. This article contains information taken from the (removed) Jurassic Park Institute site Ceratosaurus was a medium sized carnivore that lived at the same time as the larger Allosaurus, in the Late Jurassic period. He called it a "nomen dubian" or doubtful name. Styracosaurus ( sti-RAK-ə-SOR-əs; meaning "spiked lizard" from the Ancient Greek styrax/στύραξ "spike at the butt-end of a spear-shaft" and sauros/σαῦρος "lizard") was a genus of herbivorous ceratopsian dinosaur from the Cretaceous Period (Campanian stage), about 75.5 to 75 million years ago. It was first discovered in 1904 by Lawrence Lambe in 1903 and later classified by him in 1904. Centrosaurus was a medium sized Ceratopsian dinosaur of the mid-late Cretaceous Period. 2016, juvenile (below) is known from a complete articulated skeleton lacking only the forelimbs. A 2009 study of Triceratops and Centrosaurus skull lesions found that bone injuries on the skulls were more likely caused by intraspecific combat (horn-to-horn combat) rather than predatory attacks. Centrosaurus differs from Triceratops in that its nose horn is much larger than the other two horns, much like a rhinoceros. Centrosaurus is a species of dinosaur which lived approximately 76.5 to 75.5 million years ago, during the Late Cretaceous Period. It was determined by a team that included Dr. Scott Sampson (of Dinosaur Train fame) that Monoclonius is a mistake. Centrosaurus Combat Configuration vs. Triceratops Combat Configuration (Bill Parsons) Triceratops skeleton (Wikimedia Creative Commons) Triceratops ’ physiology is simple to understand, the dentition consisted of 36-40 teeth packed closely together in batteries and their shape suggests an herbivorous lifestyle. Chasmosaurus belli (Lambe 1902, 1914; Late Cretaceous, up to 4.2m) is distinct from Triceratops in having short orbital horns and a heart-shaped shield lightened by large fontanelles (distinct from the upper temporal fenestrae). For a dinosaur so terrifyingly powerful as Tyrannosaurus, there was no greater rival than Triceratops.Each was the acme of their respective lineage–one a hypercarnivorous bone … Triceratops vs. Quetzalcoatlus April 5, 2017 TBA Dinosaurs: Triceratops and Quetzalcoatlus. 8 8 Parasaurolophus vs. Allosaurus September 13, 2017 A study rejects claims that Triceratops and the lesser-known Torosaurus are one and the same type of dinosaur. 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