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long-neck giant · Disputed
Trigonosaurus
Say it like this: “try-GON-o-SAWR-us”
Trigonosaurus pricei
Trigonosaurus ate plants and walked on four legs. It lived in the Late Cretaceous. Bones have been found in Brazil.
- When
- Late Cretaceous (Maastrichtian) · roughly 72.2 to 66 million years ago
- Named in
- 2005 · Campos, D. A.; Kellner, A. W. A.; Bertini, R. J.; Santucci, R. M.
- Hip height
- Not established
- Length
- 9.5 m · 31 ft
- Weight
- Not established
- Found in
- Brazil · Serra da Galga
- Food and walking
- Herbivore · Four legs
- Kind
- long-neck giant · Sauropod
- Family branch
- Aeolosaurini
The story in short
In 2005, D. A. Campos and colleagues published the name Trigonosaurus. The name means “triangle lizard.”
It lived in the Late Cretaceous (Maastrichtian), roughly 72.2 to 66 million years ago. Finds come from Brazil, including the Serra da Galga Formation. It was a herbivore and walked on four legs.
Published estimates put Trigonosaurus at a length near 9.5 m.
On the family tree it sits in Aeolosaurini, among the sauropod dinosaurs.
Close relatives
Adamantisaurus
Adamantisaurus mezzalirai
Late Cretaceous (Campanian · Maastrichtian) · roughly 83.6 to 66 million years ago
Aeolosaurus
Aeolosaurus rionegrinus
Late Cretaceous (Campanian · Maastrichtian) · roughly 83.6 to 66 million years ago
Arrudatitan
Arrudatitan maximus
Late Cretaceous (Campanian · Maastrichtian) · roughly 83.6 to 66 million years ago