Coelophysis

Coelophysis was one of the first true dinosaurs. It's also one of the most specimen-rich genera, as fragmentary remains have been found worldwide.

Iberomesornis's Idea
Coelophysis would live in packs from 10 to 20, excluiding young. Coelophysis would eat anything avaible: lungifsh, coelacanths, lizards, and even prosauropods. Bigger prey such as Placerias or Massospondylus would be pack-hunted. Due to this, Coelophysis would need tons of space for the entire pack, and lakes and live prey in form of fish and small lizards. A Coelophysis pack's lair would be caves with cliffs, rocks and tons of other "paltforms".