Genus
Valid Extinct

Guaibasaurus

Bonaparte et al. 1999

Guaibasaurus is an extinct genus of basal saurischian dinosaur known from the Late Triassic Caturrita Formation of Rio Grande do Sul, southern Brazil. Most analyses recover it as a sauropodomorph, although there are some suggestions that it was a theropod instead. In 2016 Gregory S. Paul estimated it at around 2 meters long and 10 kg, whereas in 2020 Molina-Pérez and Larramendi listed it at 3 meters and 35 kg.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
3
Group
Dinosaures
Terrestrial
Guaibasaurus
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Wikimedia
PBDB ↗ Wikipedia ↗
Classification
Dinosauria Unranked clade
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Saurischia Unranked clade
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Sauropodomorpha Unranked clade
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Guaibasauridae Family
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Guaibasaurus Genus
Measurements
Length
3 m ⓘ
Guaibasaurus candelariensis
1,8 m ⓘ
Mass
35 kg ⓘ
Guaibasaurus candelariensis
Fossil sites 3 geolocated sites
Distribution
Top countries
🇧🇷 Brazil
3
Geological formations
Caturrita
3
Temporal distribution
Norian (227.3–205.7 Ma)
3
Species (1)
Guaibasaurus candelariensis 227 Ma
Images 2
Bibliography
Original description
J. F. Bonaparte, J. Ferigolo, and A. M. Ribeiro. 1999. A new early Late Triassic saurischian dinosaur from Rio Grande do Sol state, Brazil. Proceedings of the Second Gondwanan Dinosaur Symposium, National Science Museum Monographs 15:89-109
Bibliography (3)
M. B. Soares, C. L. Schultz, and B. I. D. Horn. 2011. New information on Riograndia guaibensis Bonaparte, Ferigolo & Ribeiro, 2001 (Eucynodontia, Tritheledontidae) from the Late Triassic of southern Brazil: anatomical and biostratigraphic implications. Anais da Academia Brasileira de Ciências 83(1):329-354 DOI ↗
G. Brea, J. F. Bonaparte, and C. L. Schultz, A. G. Martinelli. 2005. A new specimen of Guaibasaurus candelariensis (basal Saurischia) from the Late Triassic Caturrita Formation of southern Brazil. II Congresso Latino-Americano de Paleontologia de Vertebrados, Boletim de Resumos. Museum Nacional/UFRJ, Rio de Janeiro
J. F. Bonaparte, J. Ferigolo, and A. M. Ribeiro. 1999. A new early Late Triassic saurischian dinosaur from Rio Grande do Sol state, Brazil. Proceedings of the Second Gondwanan Dinosaur Symposium, National Science Museum Monographs 15:89-109