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beaked plant-eater · Doubtful name
Loncosaurus
Loncosaurus argentinus
Loncosaurus ate plants and walked on two legs. It lived in the Late Cretaceous. Bones have been found in Argentina.
- When
- Late Cretaceous (Cenomanian · Turonian · Coniacian) · roughly 100.5 to 85.7 million years ago
- Named in
- 1899 · Ameghino, F.
- Hip height
- Not established
- Length
- 5 m · 16 ft
- Weight
- Not established
- Found in
- Argentina · Mata Amarilla
- Food and walking
- Herbivore · Two legs
- Kind
- beaked plant-eater · Ornithopod
- Family branch
- Iguanodontia
The story in short
Loncosaurus was formally named in 1899 by F. Ameghino.
Fossils referred to Loncosaurus date to the Late Cretaceous (Cenomanian · Turonian · Coniacian), roughly 100.5 to 85.7 million years ago. Finds come from Argentina, including the Mata Amarilla Formation. It was a herbivore and walked on two legs.
Published estimates put Loncosaurus at a length near 5 m.
On the family tree it sits in Iguanodontia, among the ornithopod dinosaurs.