Scientific classification
Kronosaurus, meaning "Lizard of Kronos", was named after the most powerful Titan in Greek Mythology, Kronos. Kronosaurus was a genus of large carnivorous marine reptiles that belong to the order of Plesiosauria and the suborder of Pliosauroidea. Kronosaurus lived during the early Cretaceous Period and was one of the largest genus of pliosaur, reaching about 9–10 meters in total body length. Kronosaurus was probably one of the top under-sea predators of its time. Its diet consisted predominantly of fish and other under sea creatures, including marine dinosaurs and other marine reptiles. Kronosaurus had a head the size of an average human.

The fossils of smaller plesiosaurs strongly suggests that Kronosaurus and its relatives may have preyed upon smaller plesiosaur species. This massive marine reptile was the biggest and baddest marine predator of the large inland sea that covered western Queensland in the Cretaceous. It used teeth the size of bananas to feast on ichthyosaurs, other plesiosaurs, turtles and fish. Kronosaurus has special air chambers on its snout that are used to scent prey in the same way as a pair of ears work, pinpointing exactly where a smell is coming from.

Body-length estimates had previously put the total length of Kronosaurus at 13.0 meters (43 feet). However, a more recent study comparing fossil specimens of Kronosaurus to other pliosaurs suggests that the previous estimate was, likely, an exaggeration, with the more accurate length estimations probably being only 9 to 11.5 meters (30–33 feet). The teeth of Kronosaurus are large in length (exceeding 7 centimeters - the largest up to 30 centimeters long with 12 centimeters crowns). However, they lack carinae (cutting edges) and the distinct trihedral (three facets) of Pliosaurus and Liopleurodon teeth. The combination of large size, conical shape and lack of cutting edges allows for easy identification of Kronosaurus teeth in Cretaceous deposits from Australia. Kronosaurus lived in the Early Cretaceous Period (Aptian-Albian). The holotype specimen of the species K. queenslandicus was described by Longman in 1924, and is currently in the Queensland Museum. Hampe described a second species, K. boyacensis, in 1992 from Colombia. A preserved K. boyacensis can be seen in Villa de Leiva Boyaca, Columbia.



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