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sharp-clawed runner
Unquillosaurus
Say it like this: “oong-KEE-yo-SAWR-us”
Unquillosaurus ceibalii
Unquillosaurus ate meat and walked on two legs. It lived in the Late Cretaceous. Bones have been found in Argentina.
- When
- Late Cretaceous (Campanian · Maastrichtian) · roughly 83.6 to 66 million years ago
- Named in
- 1979 · Powell, J. E.
- Hip height
- Not established
- Length
- 5.6 m · 18 ft
- Weight
- Not established
- Found in
- Argentina · Los Blanquitos
- Food and walking
- Carnivore · Two legs
- Kind
- sharp-clawed runner · Theropod
- Family branch
- Avetheropoda
The story in short
Unquillosaurus was formally named in 1979 by J. E. Powell. The name honors a person tied to the fossil or its study.
Fossils referred to Unquillosaurus date to the Late Cretaceous (Campanian · Maastrichtian), roughly 83.6 to 66 million years ago. Finds come from Argentina, including the Los Blanquitos Formation. It was a carnivore and walked on two legs.
Published estimates put Unquillosaurus at a length near 5.6 m.
On the family tree it sits in Avetheropoda, among the theropod dinosaurs.
Close relatives
Aorun
Aorun zhaoi
Middle Jurassic (Callovian) · roughly 165.3 to 161.5 million years ago
Chilantaisaurus
Chilantaisaurus tashuikouensis
Early Cretaceous (Aptian · Albian) · roughly 121.4 to 100.5 million years ago
Datanglong
Datanglong guangxiensis
Early Cretaceous (Aptian) · roughly 121.4 to 113.2 million years ago