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The Jurassic Period was the middle portion of the Mesozoic Era; it followed the Triassic Period. It lasted from about 206 to 144 million years ago. Huge, long-necked dinosaurs appeared during the Jurassic.
In the Middle Jurassic, the supercontinent Pangaea started to drift apart. There was a minor mass extinction toward the end of the Jurassic period. During this extinction, most of the stegosaurid and enormous sauropod dinosaurs died out, as did many genera of ammonoids, marine reptiles, and bivalves. No one knows what caused this extinction.
The Cretaceous Period followed the Jurassic period.
Allosaurus The biggest meat-eating dinosaur from the late Jurassic period. |
Anchisaurus A plant-eating dinosaur, a late prosauropod, from the early Jurassic period. |
Apatosaurus A huge, long-necked, whip-tailed plant-eating dinosaur; it used to be known as Brontosaurus. |
Apatosaurus (Simple version) A long-necked plant-eater; it used to be known as Brontosaurus. |
Barosaurus A huge, long-necked, whip-tailed plant-eater from the Jurassic period. |
Brachiosaurus A tall, long-necked plant-eating dinosaur. |
Brachiosaurus (Simple version) A tall, long-necked plant-eater. |
Brachiosaurus Skeleton Brachiosaurus was a tall, long-necked plant-eater. |
Ceratosaurus A Jurassic theropod with a snout horn. |
Compsognathus The smallest dinosaur yet found; it was a meat-eater that was the size of a chicken. |
Compsognathus (Simple version) The smallest dinosaur yet found; it was a meat-eater that was the size of a chicken. |
Cryptoclidus A large, swimming reptile - a plesiosaur. |
Dilophosaurus A meat-eating dinosaur with a double crest on its head. (early Jurassic) |
Dilophosaurus (Simple version) A meat-eating dinosaur with a double crest on its head. (early Jurassic) |
Diplodocus A long-necked, whip-tailed plant-eater about 90 ft (27 m) long. |
Fabrosaurus A small, primitive plant-eating dinosaur from South Africa. |
Ichthyosaurus An extinct marine reptile from the time of the dinosaurs - not a dinosaur. |
Janenschia Janenschia was a huge, plant-eating dinosaur with an elongated neck and tail. It was a sauropod from the late Jurassic period, about 156 million to 150 million years ago. |
Kentrosaurus A spiked, plated, plant-eating dinosaur from the Jurassic period. |
Liopleurodon Liopleurodon was the biggest plesiosaur. It was a huge, swimming reptile that lived over a hundred million years ago, during the Jurassic period. |
Mamenchisaurus The dinosaur with the longest neck - a plant-eating giant from China. |
Mamenchisaurus (Simple version) The dinosaur with the longest neck - a plant-eating giant from China. |
Massospondylus An early plant eater with a long neck and long tail. |
Megalosaurus This large meat-eater was the first dinosaur named. |
Ornitholestes A fast-moving Jurassic theropod with a small crest on its snout. |
Plesiosaurus An extinct, fish-eating marine reptile with four flippers, a plesiosaur. |
Pterodactylus Flying meat-eaters from the late Jurassic - not a dinosaur. |
Rhamphorhynchus A flying, fish-eating reptile (a pterosaur) with a long tail; it lived during the late Jurassic period. |
Riojasaurus A large, early, South American, plant-eating dinosaur. |
Saurolophus Saurolophus was a duck-billed, plant-eating dinosaur. |
Segisaurus A fast-moving, bird-like meat-eater. |
Seismosaurus A huge, long-necked plant-eater from the Jurassic period. |
Seismosaurus Simple Version A huge, long-necked plant-eater from the Jurassic period. |
Stegosaurus A plant-eating dinosaur with rows of plates on its back and spikes on its tail. |
Stegosaurus (Simple version) A plant-eating dinosaur with rows of plates on its back and spikes on its tail. |
Stegosaurus Skeleton See the bones of this huge, plated plant-eater. |
Supersaurus The longest dinosaur ever found; a long-necked plant-eater from the Jurassic period. |
Supersaurus (Simple version) The longest dinosaur ever found; a long-necked plant-eater. |
Syntarsus A fast-moving, meat-eating dinosaur from the Jurassic period. |
Syntarsus (Simple version) A fast-moving, meat-eating dinosaur from the Jurassic period. |
Ultrasauros A huge, long-necked sauropod dinosaur from the Jurassic period. |
Ultrasauros (Simple version) A huge, long-necked sauropod dinosaur from the Jurassic period. |
Vulcanodon A very early sauropod (long-necked plant-eater). |
Xiaosaurus (pronounced sheow-SAWR-us) A small, plant-eating dinosaur from the Jurassic period. |
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