Cretaceous
Siamosaurus
Siamosaurus suteethorni
The catalogue presents Siamosaurus as a carnivore member of Spinosauridae that lived during the Cretaceous, between 130.0–125.0 Ma. Its estimated range is 9.0–10.0 m in length and 2.0–3.0 t in mass, giving a practical sense of scale. Reference material comes from Sao Khua Formation, Thailand. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Siamosaurus, the PBDB records the taxonomic attribution as Buffetaut and Ingavat (1986).
The PBDB places it in Spinosauridae, and the catalogue record assigns it to the family Spinosauridae.
- PBDB · taxon.parent
- Spinosauridae
In the PBDB record, the reported stratigraphic range runs from the Barremian to the Aptian.
The PBDB catalogues 3 occurrences, with material from the Sao Khua Formation (3). Provenance: Thailand.
The catalogue records the type locality as “Sao Khua Formation, Thailand”.
- Sao Khua Formation, Thailand
The catalogue's reference measurements are 9.0–10.0 m in length and 2.0–3.0 t in mass — estimates, which vary with specimen and method.
- 9.0-10.0 m
- 2.0-3.0 tons
The record gathers 19 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
- 9.0–10.0 m
- Weight
- 2.0–3.0 t
- Period
- Cretaceous
- Time range
- 130.0–125.0 Ma
Discovery Information
- First Discovery
- 1986
- Described by
- Buffetaut & Ingavat
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Saurischia
- Family
- Spinosauridae
- Genus
- Siamosaurus
- Species
- S. suteethorni
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
- not documented in this catalogue
- Type locality
- Sao Khua Formation, Thailand