The Early Cretaceous Period was a time in which the Earth was undergoing a process of change. Learn more about some common and not so common Early Cretaceous dinosaurs, including the Iguanodon, Muttaburrasaurus, and Sauropelta.


The first remains of Hypsilophodon were discovered in 1849 from Early Cretaceous rocks on the Isle of Wight, England. They were long-legged, swift and agile. Scientists even thought they might have lived in trees. See why.

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  • Acrocanthosaurus


    Acrocanthosaurus was a sauropod of spectacular proportions. In some ways it looked like many other meat-eating dinosaurs, but it had a sail along its back. See pictures and learn more about this dinosaur. See more »

  • Carnotaurus


    Carnotaurus (its name means "meat bull") is known from a single, nearly complete skeleton that had skin impressions over much of the skull and body. Read more about this South American dinosaur's unusual features. See more »

  • Early Cretaceous Period

    Early Cretaceous Period

    The Early Cretaceous Period was a time in which the Earth was undergoing a process of change. Learn about the Early Cretaceous Period. See more »

  • Iguanodon


    This dinosaur got its name, "iguana tooth," because its tooth looked like those of an iguana. It was a large ornithopod and walked on its stocky back legs. Discover if it was a plant or meat eater. See more »

  • Muttaburrasaurus


    The "reptile from Muttaburra," Muttaburrasaurus is one of the recently discovered ornithopods from Australia is and it is one of the best known from there. Learn more about this plant-eating dinosaur and its relatives. See more »

  • Ouranosaurus


    Discovered in 1966 in Niger is africa, this new dinosaur was first named and studied in 1976. Its name means "brave reptile." See why it is one of the most puzzling large ornithopods of the Cretaceous. See more »

  • Sauropelta


    Sauropelta was different from many ankylosaurs because it had two types of teeth. They are also well-known as having the most accurate skeletal reconstructions and life restorations of any known ankylosaur. Read more. See more »

  • Tenontosaurus


    Tenontosaurus was a medium-size ornithopod dinosaur from Montana and Wyoming. Skeletons range in size from very small juveniles to almost 22-foot-long adults. Learn more about how this dinosaur lived and what it ate. See more »

  • Wuerhosaurus


    The best-documented Early Cretaceous stegosaur is Wuerhosaurus. Skeletons were found in the Tugulo Formations near the northwestern part of the Junggar Basin, China. Learn more about his historic dinosaur. See more »

  • Baryonyx


    Baryonyx was found in 1983 by an amateur fossil collector in Surrey, England. He discovered a large claw that was nearly a foot long is and the animal was named for this fossil, which means "heavy claw." Learn more. See more »

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