Chapter 3 Dinos

Question 1

In 1888 seeley recognized the two types of Dino’s which are ?

Answer 1

Saurischians and ornithischians

Question 2

What are saurischians characterized by

Answer 2

Lizard like hip bones
Meat eaters like T. rex
And herbivorous long necked sauropod giants

Question 3

Ornithischians characteristics

Answer 3

Hips shaped like those of living bird although not closely related to birds
Herbivorous armored Dino’s horned Dino’s duck bills and bizarre head ramming

Question 4

First ornithischians appeared when

Answer 4

Middle Triassic period 238 mya
30-120 lb
Bipedal

Question 5

All dinosaurs were not what at earliest forms

Answer 5

Giants

Question 6

Attributes of ornithischians

Answer 6

Bird shaped hips (tip of pubis lied along ischium allowed room for expansive guys for digestion)
Beak to crop plants
Nutcracker jaw joint (below tooth row) slowed all teeth to come together

Question 7

Early offshoot of ornithischians lineage was the

Answer 7

Thyreophora 
Shield bearers (armed Dino's)

Question 8

Distinguishing feature of thyreophoran

Answer 8

Armor in skin
Bones referred to as osteoderms
(Similar to those in alligator)

Question 9

Advanced thyreophorans included what two major groups

Answer 9

Ankylosaurs (dinosaur tanks)

Stegosaurs (played lizards)

Question 10

When did played stegosaurus decline and what were they considered? (The least ???)

Answer 10

When flowering plants showed up in Cretaceous

Intelligent

Question 11

Distinguishing attribute of stegosaurs

Answer 11

Plates and spikes along or besides backbone

Question 12

Most famous stegosaur

Answer 12

Stegosaurus enormous plates and two sets of spikes on its tail

Question 13

What is the most valuable theory about the plates on a stegosaurs back
Can they test it

Answer 13

Same species display
More often right than wrong
No

Question 14

What did they determine about plates

Answer 14

More than 17 held upright and major overlap between them

Question 15

How do we know about brain size of stegosaurus ?

Answer 15

Endocarditis ( sediments that I filled the brain cavity during fossilization became solidified)

Question 16

How much does stegosaurus brain weigh
Proportions of stegosaur brain show it had a small? But huge?
Saying that came from them

Answer 16

2.5-2.9 oz
Cerebrum (complex thinking)
Olfactory loves great sense of smell
Dumb as a Dino

Question 17

Ankylosauria means ?known in what time period but primarily

Answer 17

Fused lizard (Dino tanks)
Middle Jurassic , Cretaceous

Question 18

Most famous species of ankylosauria

How long from where

Answer 18

Ankylosaurus
30 foot
Hell creek formation Montana

Question 19

Diagnostic feature of ankylosaurs

Answer 19

Extensive armor over the sides of the body and neck

Question 20

Ankylosaurus was which type of ankylosaur and what time did it live during

Answer 20

Proper bands of armor and tail clubs made from fused vertebrae and osteoderms
T. rex
Hard to imagine it getting by this defensive armament

Question 21

Ankylosaurs had elaborate folding if

Answer 21

Nasal passages

Question 22

Why do they often find ankylosaurs in marine sediments covered with shark bites

Answer 22

Floated out to see like today’s tortoises

Question 23

Why crazy theories ?

Answer 23

Paleontology has a history founded solely in geology