Britannica AI Icon

Kronosaurus

fossil marine reptile

Quick Summary

Kronosaurus was a large, carnivorous marine reptile belonging to the pliosaur group, which are characterized by massive heads and short necks. Fossils of Kronosaurus have been found in Australia and Colombia, dating back to the Early Cretaceous period. This ancient creature grew to approximately 9–11 meters (29.5–36 feet) in length, with its skull alone measuring between 2.2 and 2.9 meters (7.2 and 9.5 feet). Pliosaurs, including Kronosaurus, used four large fins for swimming and possessed powerful jaws with large teeth. They were part of the order Plesiosauria, which also included their long-necked relatives, the plesiosaurs.12

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Ask Britannica AI about this topic

Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.