The long-necked Brachiosaurus and armored Stegosaurus appear to have little in common, but both lived in North American during the Jurassic period, their geologic timelines overlapping. Also, both were herbivores capable of ignoring all but the largest predators. History: Stegosaurus survived an impossibly long time, with a fossil record extending from 200 million to 146 million years ago. That makes the 5 million-year timespan of Brachiosaurus seem brief in contrast. They did co-exist, however, as Brachiosaurus fossils have been found in rocks dating between 155 million and 150 million years. Scientific Name: Brachiosaurus altithorax and Stegosaurus stenops Characteristics: The Jurassic world comes to life with these realistic mini-figures. Use them in a dinosaur diorama or for a dinosaur-inspired party. Size: The Stegosaurus mini figure is about the size of a grape, while Brachiosaurus is slightly longer. All of our products are Non-toxic and BPA free192 Pieces Per Bag.