The Triassic "Age of Pseudosuchians"

Question 1

Q: What were some crocodile-line archosaurs that thrived during the Triassic?

Answer 1

A:

Phytosaurs (semiaquatic predators).
Aetosaurs (armored herbivores).
Rauisuchids and Prestosuchids (upright terrestrial predators).
Poposauroids (sail-backed or bipedal species).

Question 2

Q: When did true dinosaurs first appear?

Answer 2

A: In the middle Triassic (~230 million years ago).