| A. Examples are: Triceratops, Stegasaurus, Brachiosaurus, and Brontosaurus (Apatosaurus/Diplodocus) B. Characteristics | 1. Reptilian qualities 2. Hip structure is distinct from other modern reptiles (lizard or bird hip) and gave them upright stance that modern reptiles do not have 3. Have found fossil eggs  Dinosaur eggs (Sidebar 1) 4. Have found fossil scale impressions 5. Dinosaur footprints | a. Can determine weight b. Can determine speed | | C. Reconstructing dinosaurs from fossil bones |