Dinosaurs

Question 0

Synapsids

Answer 0

First appeared in carniforous
Synapomorphy- infra temporal fenestra
(Allowed more room for larger jaw closing muscles more powerful bite)

Question 1

Amniotia

Answer 1

First appeared in early carniforous
Synapomorphy- amniotic eggs
(Laid on dry land, complete colonization of land, shelled eggs)

Question 2

Reptilia

Answer 2

First appeared in carniforous
Synapomorphy- color vision
Post temporal fenestra

Question 3

Sauria

Answer 3

First Appeared in late carniforous
Synapomorphy- infra temporal fenestra
Supra temporal fenestra
Back of the skull concave eardrum

Question 4

Lepidsauria

Answer 4

Late carniforous, early Permian

Synapomorphy- overlapping scales

Question 5

Squalmala

Answer 5

Synapomorphy- moveable joint between quadrants (bone connects with lower jaw) 
Cranial kinesis (ability to move one part of skull in relation to another)

Question 6

Euryapsid

Answer 6

Extinct marine reptiles

Question 7

Archosauriforms

Answer 7

First appeared in late Permian 
Synapomorphy- antorbital fenestra 
Mandibular fenestra 
Symmetrical foot (upright posture) 
Serrated teeth 
Socketed teeth

Question 8

Archosauria

Answer 8

Synapomorphy- four chambered heart
Acetabular crest (brace femur in upright orientation)
Complex nest