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Temporal range: Aptian
An artist's illustration of Koolasuchus cleelandi
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Order: Temnospondyli
Suborder: Stereospondyli
Family: Chigutisauridae
Genus: Koolasuchus
Warren et al., 1997
Binomial name
Koolasuchus cleelandi
Warren et al., 1997

Koolasuchus ( Kool’s crocodile) was a large temnospondyl about the size of a modern day crocodile. Since crocodiles weren't able to live in Antarctica (even without the ice caps), giant amphibians remained. They preyed upon small dinosaurs, such as Leallynasaura. They also lived in Australia 137 to 105 MYA. It was about 4.5 to 5 metres (14.5 - 15 ft) long and weighed 500 kg.

Koolasuchus is one of the last temnospondyl species to survive up into the cretaceous. Most temnospondyl lived and perished through the Carboniferous, Permian, and Triassic.




In popular culture

  • Koolasuchus was seen in Walking with Dinosaurs. It was first seen grabbing a dead Leaellynasaura. Later it was seen ambling out of its hibernation to go swim in the river. It was later seen trying to catch a juvenile Leaellynasaura, but missed. It was finally seen returning from the river back to its stream to go back into hibernation.
  • Koolasuchus appeared in the documentary series called Paleoworld in the episode "Mystery of Dinosaur Cove".
  • It also appears in Jurassic Park: Builder as a limited edition aquatic creature. It uses the Dakosaurus, Geosaurus and Metriorhynchus animations even though they are unrelated, and share almost no anatomical similarities. Furthemore it is innacurately portrayed as a saltwater-loving marine animal, while in reality it wouldn't survive due to being a freshwater-loving terrestrial amphibian.
  • It also appears in Jurassic World: The Game as a rare amphibian.
  • Koolasuchus will be able created in Jurassic World: Alive.

A Scale of the animal


  • In WWD, Koolasuchus lived alongside Leallynasaura. It was extinct at that time.
  • In Jurassic World the Game, It is more accurate than in Jurassic Park Builder. In JWTG, it is shown as a freshwater amphibian, in JPB, it is in saltwater.



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