Ornithischians and Saurischians Flashcards by Charlie Collier | Brainscape

Q

What are the 2 lineages of dinosaurs?

A

ornithischia - bird like hips
saurischia - reptile like hips: birds evolved from these

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Q

Describe the pelvis of earliest amniote

A

ilium fused to sacral vertebrae
ischium and pubis do not extend far anterior or posterior to acetabulum

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Q

Describe the pelvis of early archosaur

A

femur horizontal to pelvis
pubis <-> femur muscle protracts leg
tail <-> femur muscle retracts leg
ischium <-> femur adducts lef

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