Therizinosaurus

Therizinosaurus cheloniformis

Therizinosaurus had the longest claws of any known animal, reaching up to 1 meter long. Despite being a theropod (typically carnivorous), it was herbivorous. It was one of the most bizarre-looking dinosaurs ever discovered.

Physical Description

Measurement Value Human Scale
Length 10.0 m about as long as 2 cars end-to-end
Height 4.0 m
Weight 5.0 t about the weight of 0.8 elephants

Diet & Feeding

Herbivore

Therizinosaurus was a plant-eating dinosaur. Herbivores typically fed on ferns, cycads, conifers, and other vegetation available during their era. Many herbivorous dinosaurs developed specialized teeth and digestive systems for processing tough plant material.

Time Period

Cretaceous Late Mesozoic Era

Therizinosaurus lived during the Cretaceous Late period of the Mesozoic Era, approximately 100.5 to 66.0 million years ago.

The final age of dinosaurs, featuring iconic species like Tyrannosaurus rex, Triceratops, and Velociraptor. Dinosaurs reached their peak diversity before the catastrophic asteroid impact at the Chicxulub crater ended the Mesozoic Era.

Discovery & Naming

Named By Evgeny Maleev
Discovery Year 1954
Discovery Location Nemegt Formation, Mongolia

Classification

Dinosauria Saurischia Theropoda Therizinosaurus

Beast feet

Bipedal, mostly carnivorous dinosaurs that include the largest land predators ever to live. Theropods gave rise to modern birds. Ranges from tiny Compsognathus to massive Tyrannosaurus rex.

Size Comparison

At 10.0 meters long and 5000.0 kg, Therizinosaurus was about as long as 2 cars end-to-end and about the weight of 0.8 elephants.

Quick Facts

Classification Theropoda
Geologic Period Cretaceous Late
Diet Herbivore
Size 10.0m long, 4.0m tall, 5.0t

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Frequently Asked Questions

When did Therizinosaurus live?
Therizinosaurus lived during the Cretaceous Late period (Mesozoic Era, 100.5–66.0 million years ago).
What did Therizinosaurus eat?
Therizinosaurus was a herbivore.
How big was Therizinosaurus?
Therizinosaurus was approximately 10.0 meters long, 4.0 meters tall, weighed around 5.0 tonnes.
When was Therizinosaurus discovered?
Therizinosaurus was first described in 1954 by Evgeny Maleev, with fossils found in Nemegt Formation, Mongolia.
What type of dinosaur was Therizinosaurus?
Therizinosaurus belonged to the Theropoda group, which is part of the larger Saurischia clade.
Where were Therizinosaurus fossils found?
Fossils of Therizinosaurus were found in Nemegt Formation, Mongolia.
What is the scientific name of Therizinosaurus?
The scientific name of Therizinosaurus is Therizinosaurus cheloniformis.

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