Ornithischian
- Small at first
- Bird-like hip
- Ischium parallel to pubis
- Thyreophora: Armored dinosaur
- Stegosaurus: Armored, plates on back, spiked tail
- Ankylosaurus: Similar characteristics to stegosaurus, but replaced them as top
dominant Thyreophora
- Ornithopods: Duck-billed and Herbivore
- Marginocephalia: Bone-headed and herbivore
- Pachycephalosauria: Bone-headed and herbivore
- Ceratopsians: Huge size, Shield-like bone head, and evolution of horns
Saurischia:
- Shape of hip/pelvis
- Ischium is perpendicular to pubis
- Sauropod
- Herbivore
- Triassic-Cretaceous
- Theropods
- Carnivore
- Bipedal
- Short forelimbs compared to hindlimbs
- Maniraptora
- Includes living birds
Dimetrodon: Dinosaur but not a dinosaur
- Considered a STEM mammal
- “Cousin of mammals”
Oviraptor
- Theropod
- “Egg thief”
- No teeth
- We thought that this theropod doesn’t eat meat but instead eat eggs
- Idea of how oviraptor looks like changes overtime due to new ideas/evidence
Iguanodon
- Ornithopod
- Discovered by Gideon and Mary Ann Mantell
, Deinonychus
- Small, carnivorous dinosaur
- Relative to velociraptor
- Very different from other reptiles, and actually a little more similar to birds instead
- Discovered by John Ostrom
Anomalocaris
- Gigantic shrimp
- From Cambrian period
Opabinia
- Small
- 6 eyes
- Has fins and legs
- From Cambrian period
Dunkleosteus
- Big jaw fish
- Teeth aren’t big however, just a big bone fish that consumes its prey
- One of the biggest bite forces of most animals during its time
Tiktaalik
- Fish with shoulder blades and neck, which most fish obviously don’t have
Pikaia
- Last common ancestor for mammals, fish, birds, etc.
- However, it seems unlikely that we even evolved from this thing
Agnathans
- Jawless Fish
- They have teeth, just no jaws
- Earliest fish
- Really diverse
- Evolution of Jaws
Sarcopterygii
- Lobe-finned fish
- These guys have relatively small bones for muscular support
- Hardened skeletons
- 2 groups alive today
- Lungfish
- Coelacanths
- These are more related to us than to any other fish