GLGY 305 Lecture 9.

GLGY 305 Lecture 9

1. Herbivorous skull - Nature of contact between upper &
is divided into 3
main pairs?
Exam- ples of
skulls?




2. Describe 5
adapta- tions for
chewing?




3. Non-chewers
vs chewers:
- Gape
- Tooth spacing
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, GLGY 305 Lecture 9

The herbivorous skull efficient grinding.
is divided into 3 main
parts: 4.An inset tooth row to support cheeks (teeth
1.The cropping medial in jaw)
section (blade like
teeth called 5.Jaw joint is above the tooth row, allowing all
incisors bite off the upper and lower teeth to make contact at
chunks of food) the same time (like water pump pliers).
2. The diastema (a o This is a less stable jaw joint, but allows teeth
~toothless gap for to make contact simultaneously, then for
food manipulation grinding side to side.
by the tongue) o (Note that a jaw joint below the tooth row
3.The cheek teeth would also allow for chewing.)
(called molars in
mammals, a place
for grinding down
food into a paste)

Herbivorous Mammal
Skulls
a) Horse
b) Lama
c) Rabbit
d) Rat

1.An expansion of
bone called the
coronoid process
for jaw muscle
attachment.

2.Closely-packed
teeth with flat
grinding surfaces

3.Teeth occlude
(fit together
tightly top to
bottom) for
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