1,600,000 - 40,000 years ago, Pleistocene.
Quinkana belonged to a group of crocodiles (mekosuchines) that are now all extinct.
Did you know?
Crocodiles that live in the water have pointed teeth that are good for holding things, but not for cutting. They use their teeth to hold animals until they drown, then shake them into bite-sized pieces. But Quinkana hunted on the land, so it could not drown its prey. Its teeth have sharp blades that it used to kill and cut up animals.