Temporal range: Early Triassic
|life restoration of Chasmatosaurus|
| Chasmatosaurus yuani|
Chasmatosaurus was a crocodile-like animal estimated to be about 3 to 4 meters long, and may have been an ancestor of that group. It, probably; hunted in the similiar manner as the modern crocodilians, attacking prey on the waterside. Its upper jaw arched down at the front, and it had teeth well suited for catching fish. It also had teeth on its palate; a primitive feature lost in later archosaurs.