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beaked plant-eater
Huallasaurus
Say it like this: “WAH-yah-SOR-us”
Huallasaurus australis
Huallasaurus ate plants and walked on two or four 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
- 2021 · Rozadilla, S.; Brissón Egli, F.; Agnolín, F. L.; Aranciaga Rolando, A. M.; Novas, F. E.
- Hip height
- Not established
- Length
- 8.7 m · 29 ft
- Weight
- Not established
- Found in
- Argentina · Los Alamitos
- Food and walking
- Herbivore · Two or four legs
- Kind
- beaked plant-eater · Ornithopod
- Family branch
- Saurolophinae
The story in short
In 2021, S. Rozadilla and colleagues published the name Huallasaurus.
Fossils referred to Huallasaurus date to the Late Cretaceous (Campanian · Maastrichtian), roughly 83.6 to 66 million years ago. Finds come from Argentina, including the Los Alamitos Formation. It was a herbivore and could move on two or four legs.
Published estimates put Huallasaurus at a length near 8.7 m.
On the family tree it sits in Saurolophinae, among the ornithopod dinosaurs.
Close relatives
Acristavus
Acristavus gagslarsoni
Late Cretaceous (Campanian) · roughly 83.6 to 72.2 million years ago
Ahshislesaurus
Ahshislesaurus wimani
Late Cretaceous (Campanian) · roughly 83.6 to 72.2 million years ago
Anasazisaurus
Anasazisaurus horneri
Late Cretaceous (Campanian) · roughly 83.6 to 72.2 million years ago