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Lecture 11 wrld dnsr
Behemoths with Body Armor
| Question | Answer |
|---|---|
| What is the bone before the dentary and what group of dinosaurs is it only found in? | Predentary, Ornithiscians |
| In ornithiscians, what is the bone over the eye? | palpebral |
| What 3 groups make up the ornithiscian? | Thyreophorans, ornithopods, marginocephalians |
| Examples of thyreophorans? | Stegosaurs and anklyosaurs |
| Examples of ornithopods? | hypsilophondontids, iguanadon, hadrosaur |
| marginocephalians? | Pachycephalosaurs, ceratopsians |
| What are some of the most primitive ornithiscians? | Pisanosaurus, Lesothosaurus, heterodontosaurus |
| One of the earliest of thyreophora and when did it appear? | scutellosaurus, early jurassic |
| When do the first stegos appear? | Middle Jurassic (anklysaurs are poorly known in the jurassic period since they reached their peak of diversity in the cretaceous period) |
| A great majority of thyreophora were (blank), which indicated that bipedalism was a trait permanently lost earlier in evolution of this group | quadrupedal |
| Thyrophean anatomy: What is the main characteristic of the thyrophean group? | body armor |
| What are some other characteristics of the thyrophean group? (both stegos and anklyos) | osteoderms (spikes and plates), three palpebrals, forlimbs are much shorter than hindlimbs |
| Stegosaur characteristics? | small heads,basic jaws with leaf-like teeth, and small brains. They also posess rows of plates/spikes running down the dorsal midline and elongate dorsal vertebrae. |
| Anklyosaur characteristics? | Heavily built, medium-sized, armored heads, same leaf-shaped teeth |
| What group possess long, narrow skulls and large shoulder spikes? | Nodosaurids |
| Other major group that has short broad skulls and tail clubs | Anklyosaurids |
| Diet of thyreophorans? | Plants about 1 meter and lower |
| Were stegos and anklyos very fast? How can we tell? | NOO. We can tell by their limb proportions |
| How did thyreophorans defend themselves? | They were slow-moving anyway so they developed osteoderm, or spikes/plates, and armor |
| What is the regulation of body temperature? | thermoregulation |
| The pattern of osteoderm was most likely used to? | Display for species identification |
Created by:
Chelseagirl2508
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