jurassic barosaurus dinosaurs

america animal barosaurus bird carnivorous claws creature cretaceous dakota dinosaur eating era evolution extinct extinction flight flying genus herbivore herbivorous jurassic lizard long longiceps nature necked north organism paleontology period plant prehistoric primeval primitive pteranodon pterodactyl pterodactyloid pterodactylus pterosaur quadruped reptile sauropod south species tailed teeth themes titanosaur usa utah vertebrate wild wildlife wing lentus