Deinosuchus

Deinosuchus was a giant extinct crocodylian from the Late Cretaceous of North America.

Deinosuchus was a giant extinct crocodylian from the Late Cretaceous of North America. It was one of the largest crocodilian relatives known and was an apex predator in rivers and estuaries, with evidence that it preyed on dinosaurs. Its name means “terrible crocodile.”

Discovery and naming

The first remains of Deinosuchus were discovered in the United States in the 19th century, and the genus was formally described in 1909. The name refers to its size and fearsome appearance.

Size and anatomy

Deinosuchus was exceptionally large for a crocodylian relative, with estimates around 10.5–11 metres in length and 6–7 tonnes in weight. It had a broad snout, powerful jaws, and large conical teeth suited to crushing prey.

Habitat and range

Fossils indicate that Deinosuchus lived in river and estuary environments across parts of North America. Reported localities include areas in what are now the United States and northern Mexico.

Ecology and behaviour

Deinosuchus was a top predator in its ecosystem. Evidence from bite marks on dinosaur bones suggests it could prey on large vertebrates, including dinosaurs, though it also likely ate smaller aquatic animals.