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plated dinosaur · Doubtful name
Amargastegos
Say it like this: “ah-MAR-guh-STEG-os”
Amargastegos brevicollus
Amargastegos ate plants and walked on four legs. It lived in the Early Cretaceous. Bones have been found in Argentina.
- When
- Early Cretaceous (Barremian) · roughly 125.8 to 121.4 million years ago
- Named in
- 2014 · Ulansky, R. E.
- Hip height
- Not established
- Length
- 4–5 m · 13–16 ft
- Weight
- Not established
- Found in
- Argentina · La Amarga
- Food and walking
- Herbivore · Four legs
- Kind
- plated dinosaur · Stegosaur
- Family branch
- Stegosauria
The story in short
Amargastegos was formally named in 2014 by R. E. Ulansky.
Fossils referred to Amargastegos date to the Early Cretaceous (Barremian), roughly 125.8 to 121.4 million years ago. Finds come from Argentina, including the La Amarga Formation. It was a herbivore and walked on four legs.
Published estimates put Amargastegos at a length near 4–5 m.
On the family tree it sits in Stegosauria, among the plated dinosaurs.
Close relatives
Baiyinosaurus
Baiyinosaurus baojiensis
Middle Jurassic (Bathonian) · roughly 168.2 to 165.3 million years ago
Bashanosaurus
Bashanosaurus primitivus
Middle Jurassic · Late Jurassic (Bajocian–Oxfordian) · roughly 170.9 to 154.8 million years ago
Chialingosaurus
Chialingosaurus kuani
Middle Jurassic · Late Jurassic (Bajocian–Oxfordian) · roughly 170.9 to 154.8 million years ago