Thyreophora, Marginocephalia, or Sauropodomorpha? What synapomorphy(s) lead you to this conclusion?
Within the clade you chose above, diagnose your dinosaur to as small (least inclusive) of a clade as possible, and explain what synapomorphy(s) lead you to this conclusion:
6) Consider the skeletal drawing of the titanosauriform sauropod Puertasaurus below:
Puertasaurus reuli
Titanosauriform sauropod
How did the paleontologists who discovered these 4 bones discern that they belong to a titanosauriform sauropod dinosaur? Or, in other words, what synapomorphies must be present among these vertebrae (hint: there are three synapomorphies, and you cannot see one of them in the drawing above)?