The Sauropodomorphas are not like their order-"brother", they were plant-eaters and they were gigantic. The Theropods could be huge but that was only some of them the rest was small quick animals. In the suborder Sauropodomorphas there are two under-groups, the Sauropods and the Prosauropods. The Prosauropods were the first in the suborder Sauropodomorphas; they were about double as long as a human height and lived as some of the first dinosaurs on earth. But they evolved fast and became bigger and taller, these new dinosaurs were the Sauropods, and they ruled the earth in the Jurassic period until the second dinosaur extinction were all except one died. The Brachiosaurus lived through the extinction in the Jurassic period and about 30 million years in the Cretaceous period.
Dinosaurs in the Ornithischian group (Sub-groups are shown with bold letters):| Prosauropods Anchisaurus Coloradia Lufengosaurus Massospondylus Mussaurus Plateosaurus |
Sauropods Apatosaurus Antarctosaurus Barapasaurus Barosaurus Brachiosaurus Camarasaurus Cetiosaurus Datousaurus Dicraeosaurus Diplodocus Euhelopus Laplatosaurus Nemegtosaurus Omeisaurus Opisthocoelicaudia Ornithopsis Pelorosaurus Rebbachisaurus Saltasaurus Shunosaurus Supersaurus Ultrasaurus Vulcanodon |
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