1. Ornithischian and Saurischian Dinosaurs
Background information

2. Classifying Characteristics
Dinosaurs are classified into one of two groups
Quadripeds vs Bipeds
Based on hip structure
Hip is made of three bones: ilium, ischium and pubis
Our focus will be on the group known as the “reptile-hipped” dinosaurs
Theropods (Saurischians)
Basis of your project: Are dinosaurs extinct?

3. Group 1: Ornithischians
Dinosaurs that are quadrupeds
Small heads, long necks
Long tails
All marine and terrestrial dinosaurs have pelvises comprised of three bones
This group is identified by one of the three bones, the pubis, and its orientation.
It points backward and is parallel to the ischium.(Berkeley.edu)
(reference for information)

4. Examples and explanations
Stegosaurus, ankylosaurus, protoceratops, triceratops, and iguanadons are examples of this group.

5. Saurischian Characteristics
Bipedal (walk on two legs)
Lizard-hipped:
Pubis orientation is key
Points down or forward
Intelligent
Large heads, and large teeth
Grasping hands
Asymmetrical hands
Long mobile neck
Divided into two major groups
Theropods
carnivores
Sauropods
herbivores

6. Theopod examples: Megalosaurus

7. Tarbosaurus

8. Archaeopteryx