| Diet | Herbivore |
| Height | 2m |
| Length | 5m |
| Weight | 800 kg |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Theropod |
| Location | China |
Erliansaurus was a fascinating theropod dinosaur that lived during the Late Cretaceous period, approximately 100 to 94 million years ago, in what is now Inner Mongolia, China. Unlike the fearsome predators typically associated with theropods, Erliansaurus was a plant-eating giant with massive claws that served a very different purpose from those of its carnivorous cousins.
This remarkable dinosaur stood about 2 metres tall at the hip and measured roughly 5 metres in length, making it a medium-sized member of its group. Erliansaurus possessed the characteristic features of its kind: a small head relative to its body size, a long neck for reaching vegetation, powerful arms ending in enormous claws, and a robust build suited to its herbivorous lifestyle. Its most striking features were undoubtedly its massive hand claws, which could reach lengths of over half a metre.
Despite being a theropod, Erliansaurus had evolved to become completely herbivorous, using its impressive claws not for hunting prey but for stripping leaves and bark from trees and pulling down branches to access the most nutritious plant material. Its relatively small teeth were adapted for processing plant matter rather than tearing flesh, representing a remarkable evolutionary shift from the typical theropod body plan.
The discovery of Erliansaurus has provided valuable insights into the diversity of theropod dinosaurs and demonstrates how these creatures adapted to fill various ecological niches, including that of large herbivores in Late Cretaceous ecosystems.
Erliansaurus was distinguished by its massive hand claws that could exceed half a metre in length, combined with a relatively small head and long neck typical of plant-eating theropods. Its robust build and powerful arms made it well-adapted for manipulating vegetation despite its fearsome-looking claws.
Erliansaurus likely spent much of its time foraging for vegetation, using its powerful claws to strip bark and leaves from trees and pull down high branches. It probably moved in small groups through forested areas, constantly searching for the large quantities of plant material needed to sustain its considerable body mass.
| Phylum | Chordata |
| Class | Saurischia |
| Order | Avetheropoda |
| Family | Therizinosauridae |
| Genus | Erliansaurus |
Erliansaurus was first described by Xu Xing and colleagues in 2007. The original fossils were discovered at Iren Dabasu Formation, Inner Mongolia, China.
