Lecture 9 - What did dinosaurs eat?

Question 1

Where is the jaw joint if you want to achieve a wide gape?

Answer 1

Same level as the tooth row

Question 2

What type of motion does a jaw joint in the same plane as the teeth allow for?

Answer 2

Scissors. Sequential wave = shear

Question 3

What can you not do with a jaw joint in the same plane as the tooth row?

Answer 3

chewing

Question 4

What are the 3 parts of the herbivorous skull?

Answer 4

1. Cropping section (blade that bites of chunks)
2. Diastema (toothless gap for tongue)
3. Cheek teeth

Question 5

Coronoid process

Answer 5

Expansion of bone up by the eye that allows for jaw muscle attachment

Question 6

Teeth occlude

Answer 6

Fit together tightly for grinding

Question 7

Where is the jaw joint in herbivores?

Answer 7

Above the tooth row allowing for the upper and lower teeth to make contact at the same time (like water pump pliers)

Question 8

Would a jaw joint below the tooth row allow for chewing?

Answer 8

yes

Question 9

Do carnivores chew their food?

Answer 9

no

Question 10

Gastroliths

Answer 10

1. help mechanically process their food
2. ballast (weight to provide stability)

Question 11

Were theropods good chewers?

Answer 11

No

Question 12

Can sauropodomorphs chew?

Answer 12

No, they are bad chewers

Question 13

Can ornithischians chew?

Answer 13

yes

Question 14

Rhamphtheca

Answer 14

Beak used to crop food (cropping section)

Question 15

Where is the jaw joint in ornithischia?

Answer 15

below the tooth row which allows for chewing

Question 16

Coprolites

Answer 16

Direct evidence. Dino poop

Question 17

Cololites

Answer 17

Gut contents. Direct evidence