exam 3

Question 1

Theropod Groups

Answer 1

“Primitive” theropods, Ceratosaur, and Tetanurans

Question 2

Dinosaurs

Answer 2

archosaurs with traits that relate to upright posture

Question 3

upright posture

Answer 3

ball on proximal femur off set from shaft of femur, hip socket thickened, ACETABULUM PERFORATED, novel ankle

Question 4

theropods

Answer 4

dinosaurs with saurischian pelvis, 5 sacral vertebrae, MANY HOLLOW BONES, bowed femur, narrow, symmetrical foot; obligated bipeds, LARGE HANDS WITH GOOD RANGE OF MOTION IN FINGERS, REDUCTION OF DIGITS 4 AND 5, light, flexible, mobile skull, strong bite, CLAWS AND TEETH CONSISTENT WITH CARNIVORY

Question 5

Tetanurans

Answer 5

carnosaurs + spinosaurs and coelurosaurs

Question 6

“Early” or “Primitive” Theropods

Answer 6

Late Triassic
a paraphyletic group, not monophyletic clade
similar shape and habits but different size
have traits of the theropods but none the traits of later theropods

Question 7

where are ceratosaurs forms found

Answer 7

india, africa, madagascar

Question 8

where are carnosaurs + spinosaurs from

Answer 8

Antarctica, south America

Question 9

where are coelurosaurs found

Answer 9

North America and Asia

Question 10

ceratosaurs

Answer 10

late triassic-cretaceous
recess between the pre maxilla and maxilla
often elongate tooth in the lower jaw fits in recess four clawed fingers on the hands
digit 5 missing
digit 4 shorter than others
bones of the pelvis fused into rigid structure
hind limbs terminate in three clawed toes
often quite large, but some small
bony ridges on skulls