Why Did the Archelon Go Extinct?

Archelon is believed to have survived the mass extinction that wiped out the dinosaurs because of their slow metabolisms and aquatic lifestyles. Having a slow metabolism allows them to survive on less food therefore requiring less energy to hunt for it.

When did the Archelon go extinct?

Archelon, other turtles (chelonians), and reptiles may have descended from captorhinids, primitive anapsids that lived during the Early Carboniferous period, about 340 million years ago and went extinct at the end of the Triassic period, about 250 million years ago.

Are Archelons extinct?

Archelon, extinct giant sea turtle known from fossilized remains found in North American rocks of the Late Cretaceous epoch (100 million to 66 million years ago). Archelon, protected by a shell similar to that found in modern sea turtles, reached a length of about 3.5 m (12 feet).