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early long-neck
Guaibasaurus
Say it like this: “GWIE-bah-SAWR-us”
Guaibasaurus candelariensis
Guaibasaurus ate plants and meat and walked on two legs. It lived in the Late Triassic. Bones have been found in Brazil.
- When
- Late Triassic (Norian) · roughly 227.3 to 205.7 million years ago
- Named in
- 1999 · Bonaparte, J. F.; Ferigolo, J.; Ribeiro, A. M.
- Hip height
- 0.7 m · 2 ft
- Length
- 1.8 m · 6 ft
- Weight
- 10–35 kg · 22–77 lb
- Found in
- Brazil · Caturrita
- Food and walking
- Omnivore · Two legs
- Kind
- early long-neck · Sauropodomorph
- Family branch
- Sauropodomorpha
The story in short
The genus Guaibasaurus dates to 1999, the year J. F. Bonaparte and colleagues described it. The name means “guaíba lizard.”
Fossils referred to Guaibasaurus date to the Late Triassic (Norian), roughly 227.3 to 205.7 million years ago. Finds come from Brazil, including the Caturrita Formation. It was an omnivore and walked on two legs.
Published estimates put Guaibasaurus at a length near 1.8 m, hips about 0.7 m high, and a body mass around 10–35 kg.
On the family tree it sits in Sauropodomorpha, among the early long-necked dinosaurs.
Close relatives
Agrosaurus
Agrosaurus macgillivrayi
Late Triassic (Rhaetian) · roughly 205.7 to 201.4 million years ago
Ahvaytum
Ahvaytum bahndooiveche
Late Triassic (Carnian) · roughly 237 to 227.3 million years ago
Arcusaurus
Arcusaurus pereirabdalorum
Early Jurassic (Hettangian · Sinemurian) · roughly 201.4 to 192.9 million years ago