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. It is uncertain what it ate, scientists agree that it was not an exclusive carnivore, but originally thought it was a carnivore. The theories are it was an insectivore, herbivore, or even an omnivore.
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. Painstaking study of one egg throughout 1995 by the Magoverns and others revealed the bones of a tiny theropod, possibly a therizinosaur, a herbivore about which little is known. The fossil baby was named "Baby Louie" after photographer Louie Psihoyes.
StoryTherizinosaurus itself doesn't appear in the movies, although its DNA was used in the creation of the Indominus rex in Jurassic World.
Therizinosaurus is an enemy in the Game Gear adaption of The Lost World: Jurassic Park, in the Baryonyx level. It is depicted as a burrowing animal.
Therizinosaurus can be created in the game Jurassic Park III: Park Builder.
Therizinosaurus can be created as a legendary herbivore in the game as of September 30th, 2015. An interesting feature to the Therizinosaurus in the game are its fur-like feathers, which it shares with its real life counterpart.Indominus rex.
Inkworks Jurassic Park III Premium Trading Cards series, a discovery of dinosaur eggs is told (see quote in the real-life section). The eggs might be of a Therizinosaurus.
A Therizinosaurus figure was planned to appear in the "Dino Rivals" toy line based around Jurassic World: Fallen Kingdom, as part of their "Mega Dual Attack" assortment, but was unfortunately cancelled. Oddly enough, the leaked image of its toy displays several noticeable differences including an almost larger head and visible teeth, oppositely seen in the real-life animal.
- Therizinosaurus is one of only four therizinosaurs in the franchise. The other three being Beipiaosaurus, Erlikosaurus, and Segnosaurus.
- WIRED - Creating Jurassic World’s New Genetically Modified Dinosaur (June 12, 2015) https://www.youtube.com/watch?v=7o8GHd17aiE
- Inkworks Jurassic Park III Premium Trading Cards #54.