Triassic
Guaibasaurus
Guaibasaurus candelariensis
The catalogue presents Guaibasaurus as a omnivore member of Guaibasauridae that lived during the Triassic, between 228.0–220.0 Ma. Its estimated range is 1.8–2.0 m in length and 10–15 kg in mass, giving a practical sense of scale. Reference material comes from Caturrita Formation, Rio Grande do Sul, Brasil. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Guaibasaurus, the PBDB records the taxonomic attribution as Bonaparte et al. (1999).
The PBDB places it in Guaibasauridae, and the catalogue record assigns it to the family Guaibasauridae.
- PBDB · taxon.parent
- Guaibasauridae
In the PBDB record, the reported stratigraphic range is the Norian.
The PBDB catalogues 2 occurrences, with material from the Caturrita Formation (2). Provenance: Brazil.
The catalogue records the holotype as MCN-PV 2355 and the type locality as “Caturrita Formation, Rio Grande do Sul, Brasil”.
- MCN-PV 2355
- Caturrita Formation, Rio Grande do Sul, Brasil
The catalogue's reference measurements are 1.8–2.0 m in length and 10–15 kg in mass — estimates, which vary with specimen and method.
- 1.8-2.0 m
- 10-15 kg
The record gathers 11 bibliographic references registered in the PBDB, listed below.
Where it lived
Fossil occurrences on today’s map and in the tectonic reconstruction.
Positions reconstructed by PBDB/GPlates, not observed; this is not an exact habitat map.
Artistic 3D reconstruction
There is no approved species-specific 3D model yet. Generic anatomy will not be presented as if it were evidence.
Physical Specifications
- Length
- 1.8–2.0 m
- Weight
- 10–15 kg
- Period
- Triassic
- Time range
- 228.0–220.0 Ma
Discovery Information
- First Discovery
- 1999
- Described by
- Bonaparte et al.
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Saurischia
- Family
- Guaibasauridae
- Genus
- Guaibasaurus
- Species
- G. candelariensis
Data status
Taxonomic name matched to PBDB and checked on 2026-08-08.
Taxonomic linkage does not automatically validate size, mass, behaviour or appearance.
- Type specimen
- MCN-PV 2355
- Type locality
- Caturrita Formation, Rio Grande do Sul, Brasil