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Therizinosaurus was a genus of the therizinosaurid family.

The appearance of Therizinosaurus has been a debate until recent decades. During the early phases of its discovery, it was assumed to be a species of an aquatic turtle. After several examinations and revisions, it was given the description of a gigantic carnosaur that measured 55 ft in length. After the discovery of related species Nothronychus, the debate over its appearance ended. While diet remains unconfirmed, Therizinosaurus was originally thought to be a carnivore. However, today, scientist agree that Therizinosaurus was not exclusively carnivorous with the possibility of being omnivorous, insectivorous, or even herbivorous.

Dinosaur researchers Florence and Charlie Magovern discovered two 18-inch-long fossilized eggs in the Xixia Basin in Nanyang, China. These are perhaps the largest eggs of any animal ever found. In 1995, a study of one of these eggs conducted by the Magoverns and others revealed the bones of a tiny theropod, which possibly belong to a therizinosaur or a herbivore about which little is known. The fossil baby was named "Baby Louie" after photographer Louie Psihoyes.[2]


Therizinosaurus itself doesn't appear in the movies, although its DNA was used in the creation of the Indominus rex in Jurassic World.[1]

Jurassic World: Dominion

Therizinosaurus has been revealed to be in Jurassic World: Dominion, thanks to an image released by Total Film.[3]




  1. 1.0 1.1 WIRED - Creating Jurassic World’s New Genetically Modified Dinosaur (June 12, 2015) https://www.youtube.com/watch?v=7o8GHd17aiE
  2. Inkworks Jurassic Park III Premium Trading Cards #54.
  3. https://twitter.com/JurassicOutpost/status/1467904818941472778