Triassic
Unaysaurus
Unaysaurus tolentinoi
The catalogue presents Unaysaurus as a herbivore member of Plateosauridae that lived during the Triassic, between 228.0–220.0 Ma. Its estimated range is 2.5 m in length and 70 kg in mass, giving a practical sense of scale. Reference material comes from Santa Maria Formation, Rio Grande do Sul, Brazil. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Unaysaurus, the PBDB records the taxonomic attribution as Leal et al. (2004).
The PBDB places it in Plateosauridae, and the catalogue record assigns it to the family Plateosauridae.
- PBDB · taxon.parent
- Plateosauridae
In the PBDB record, the reported stratigraphic range is the Norian.
The PBDB catalogues 1 occurrence, with material from the Caturrita Formation (1). Provenance: Brazil.
The catalogue records the holotype as MCN-PV10005 and the type locality as “Santa Maria Formation, Rio Grande do Sul, Brazil”.
- MCN-PV10005
- Santa Maria Formation, Rio Grande do Sul, Brazil
The catalogue's reference measurements are 2.5 m in length and 70 kg in mass — estimates, which vary with specimen and method.
- 2.5 m
- 70 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
- 2.5 m
- Weight
- 70 kg
- Period
- Triassic
- Time range
- 228.0–220.0 Ma
Discovery Information
- First Discovery
- 2004
- Described by
- Leal et al.
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Saurischia
- Family
- Plateosauridae
- Genus
- Unaysaurus
- Species
- U. tolentinoi
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-PV10005
- Type locality
- Santa Maria Formation, Rio Grande do Sul, Brazil