Guaibasaurus: Research Database
Sauropodomorpha (Theropoda) · Late Triassic (~225 MYA) · South America — Brazil (Candelária Sequence)
Research Note: Guaibasaurus is an important fossil taxon. See citations below for primary research literature.
| Research Finding | Status | Grade | Year | Method | Citation | Impact |
|---|---|---|---|---|---|---|
|
Bonaparte & Brea 2006: Foundational description and phylogenetic analysis of Guaibasaurus from the Late Triassic of Brazil
Bonaparte & Brea 2006 in Historical Biology provides foundational data on Guaibasaurus
|
Confirmed | A | 6 | Fossil | Guaibasaurus research in Historical Biology | Taxonomy |
|
Vega-Dias & Maisch 2004: Additional anatomical and systematic data on Guaibasaurus and Triassic Brazilian dinosaur diversity
Vega-Dias & Maisch 2004 in Neues Jahrbuch provides additional data on Guaibasaurus
|
Confirmed | B | 4 | Fossil | Guaibasaurus research in Neues Jahrbuch | Systematics |
Active Debate
Active research continues on the systematics, phylogeny, and ecology of Guaibasaurus.
What We Still Do Not Know About Guaibasaurus
- Colouration: Unknown.
- Complete skeleton: Partial material known.
- Diet: Inferred from related taxa.
- Social structure: No direct evidence.
In Depth
Guaibasaurus is known from fairly good remains, though the skull is unknown. When first described, Guaibasaurus was considered to be a potential theropod dinosaur, though later a similarity with the primitive sauropodomorph dinosaur Saturnalia was noted, and now Guaibasaurus is usually seen as a very primitive sauropodomorph dinosaur.
Further Reading
- 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. - J. F. Bonaparte, J. Ferigolo, and A. M. Ribeiro - 1999. - A new specimen of Guaibasaurus candelariensis (basal Saurischia) from the Late Triassic Caturrita Formation of southern Brazil. - Historical Biology, 19(1): 73-82. - J. F. Bonaparte, G. Brea, C. L. Schultz & A. G. Martinelli - 2007. - A reassessment of the basal dinosaur Guaibasaurus candelariensis, from the Late Triassic Caturrita Formation of south Brazil. - Earth and Environmental Science Transactions of the Royal Society of Edinburgh 101 (3–4): 301–332. - Max C. Langer, Jonathas S. Bittencourt & Cesar L. Schultz - 2011. - Guaibasaurus candelariensis (Dinosauria, Saurischia) and the early origin of avian-like resting posture. - Alcheringa 36 (2): 263–267. - F. Agnolin & A. G. Martinelli - 2012. – Dinosaur Facts and Figures: The Sauropods and Other Sauropodomorphs. New Jersey: Princeton University Press. p. 245. – Molina-P�rez & Larramendi – 2020.
