Therizinosaurus || Scythe lizard || Description and Facts!
Channel: Animals Descriptions
Date: 2021-08-15

Therizinosaurus (meaning 'scythe lizard') is a genus of very large therizinosaurid that lived in Asia during the Late Cretaceous period in what is now the Nemegt Formation around 70 million years ago. It contains the single type species Therizinosaurus cheloniformis. The first remains of Therizinosaurus were found in 1948 by a Mongolian field expedition at the Gobi Desert and later described by Evgeny Maleev in 1954. The genus is known only from a few bones, including gigantic manual unguals (claw bones), from which it gets its name, and additional findings comprising fore and hindlimb elements that have been discovered during the 1960s–1980s.


Therizinosaurus was a colossal therizinosaur that could grow up to 9–10 m long and weigh possibly over 3 t. Like other therizinosaurs, it would have been a slow-moving, long-necked high browser equipped with a rhamphotheca (horny beak) and a wide torso for food processing. The forelimbs were particularly robust and had three fingers that bore unguals which, unlike other relatives, were very stiffened, elongated, and only had significant curvatures at the tips. Therizinosaurus had the longest known manual unguals of any land animal, reaching above 50 cm (500 mm) in length. Its hindlimbs ended in four functionally weight-bearing toes differing from other theropod groups in which the first toe was reduced to a dewclaw and also resembling the unrelated sauropodomorphs.


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