- Length
- 1.8 m
- Diet
- Plant-eater
- When
- Late Triassic221 to 210 million years ago
- Fossils found in
- Brazil
- Named by
- Bonaparte, Ferigolo and Ribeiro (1999)
- Family tree
- Dinosauria › Saurischia › Theropoda
Prosauropods. Early long-necked plant-eaters, relatives of the sauropods. See all 16
Lived at the same time
Other prosauropods
- Coloradisaurus Late Triassic
- Mussaurus Late Triassic
- Riojasaurus Late Triassic
- Melanorosaurus Late Triassic
- Thecodontosaurus Late Triassic
- Plateosaurus Late Triassic
- Massospondylus Early Jurassic
- Jingshanosaurus Early Jurassic
Source: Guaibasaurus in the Natural History Museum Dino Directory, read 12 November 2026. Sizes are the museum's estimates for a typical adult. "Lived at the same time" lists dinosaurs whose dates overlap, which does not always mean they met.