chapter 26 ankylosaurs

Question 1

Recall the evolutionary novelty shared by all thyreophorans.

Answer 1

the presence of one or more rows of armour plates in the skin above or alongside the vertebral column

Question 2

What does ankylosaur mean? What does it relate to?

Answer 2

-means fused or stiff lizard
-this realates to the large amount of osteoderms and armour they possessed.

Question 3

What other evolutionary novelties are shared amongst ankylosauria?

Answer 3

-Ankylosauria have a rod of fused
vertebrae along their backside
-Broadly arched rib cages and
hip girdle
-Small triangular-shaped heads
with low skulls (width between
eyes > height of the skull)
-Closed fenestra & added dermal
bones on the skull

Question 4

Describe ankylosaur tracks and their diet?

Answer 4

Ankylosaur tracks reveal a slow-moving, wide-bodied dinosaur, while their teeth and jaw structure indicate a specialized herbivorous diet focused on tough, low-growing plants. Their fossils and tracks together paint a picture of heavily armored grazers that thrived in Cretaceous ecosystems.

Question 5

where and when did Zuul live? and what where its features?

Answer 5

In 2017 a new species of ankylosaur was named following the
discovery of a spectacular specimen from 75 Ma strata in Montana
-skull 50cm and 6 meters in length

Question 5

can you Explain how the two Ankylosauria clades differ?

Answer 5

-Nodosauridae: non compressed airway with no tail club
-Ankylosauridae: compressed airway and tail club.

Question 5

How did ankylosaurs defend themselves against predators?

Answer 5

they got low to the ground to defend their stomachs and used their clubs

Question 6

where and when did Edmontonia live? and what where its features?

Answer 6

is a nodosaur from the Late Cretaceous of
Alberta found in the Dinosaur Park Formation stata 75 Ma

Question 7

where and when did Euoplocephalus live? and what where its features?

Answer 7

is a ankylosaurid from the Late Cretaceous of Alberta found in the Dinosaur Park Formation stata 75 Ma

Question 8

where and when did Ankylosaurus live? and what where its features?

Answer 8

-rare fossils in the Hell Creek Formation (68 – 66 Ma), living alongside T-rex, Triceratops, and Edmontosaurus.
-largest known ankylosaurid at
6 to 8 metres in length and weighing in at 6 tonnes (13,000 pounds)

Question 9

where and when did Borealopelta live? and what where its features?

Answer 9

Early Cretaceous beds (115 Ma) from Alberta
- brown in colour