Crocodilians living in this ecosystem included Leidyosuchus, around 3.5 metres long, and the smaller Albertochampsa. The semiaquatic superficially croc-like Champsosaurus also was present.

The semiaquatic superficially croc-like Champsosaurus also was present. This was a warm, wet and flat ecosystem, bisected by large rivers. There were duck-billed dinosaurs, horned dinosaurs, armored ...

The semiaquatic superficially croc-like Champsosaurus also was present. This was a warm, wet and flat ecosystem, bisected by large rivers. There were duck-billed dinosaurs, horned dinosaurs, armored ...

The semiaquatic superficially croc-like Champsosaurus also was present. This was a warm, wet and flat ecosystem, bisected by large rivers.

About 76 million years ago, a juvenile of one of the largest flying creatures in Earth's history, called Cryodrakon boreas, walked along a riverbank on a lush coastal plain and lowered its ...

Instead, it matched the shape of a croc's tooth. Crocodilians living in this ecosystem included Leidyosuchus, around 12 feet (3.5 meters) long, and the smaller Albertochampsa. The semiaquatic ...

Some, like crocodiles and turtles, didn’t. And still others, like multituberculate mammals and champsosaurus, survived the asteroid but went extinct in the aftermath. Why the difference?

Although the neochoristodere Champsosaurus is well documented in Campanian deposits of western North America, species-diagnostic remains from these strata are restricted to the Dinosaur Park Formation ...