Cretaceous
Gorgosaurus
Gorgosaurus libratus
The catalogue presents Gorgosaurus as a carnivore member of Tyrannosauridae that lived during the Cretaceous, between 76.6–75.1 Ma. Its estimated range is 8.0–9.0 m in length and 2.0–2.5 t in mass, giving a practical sense of scale. Reference material comes from Dinosaur Park Formation, Alberta, Canada. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Gorgosaurus, the PBDB records the taxonomic attribution as Lambe (1914).
The PBDB places it in Albertosaurinae, and the catalogue record assigns it to the family Tyrannosauridae.
- PBDB · taxon.parent
- Tyrannosauridae
In the PBDB record, the reported stratigraphic range runs from the Campanian to the Maastrichtian.
The PBDB catalogues 15 occurrences, with material from the Dinosaur Park Formation (12), from the Judith River Formation (2) and from the Oldman Formation (1). Provenance: Canada and United States.
The catalogue records the holotype as NMC 2120 and the type locality as “Dinosaur Park Formation, Alberta, Canada”.
- NMC 2120
- Dinosaur Park Formation, Alberta, Canada
The catalogue's reference measurements are 8.0–9.0 m in length and 2.0–2.5 t in mass — estimates, which vary with specimen and method.
- 8.0-9.0 m
- 2.0-2.5 tons
The record gathers 63 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
- 8.0–9.0 m
- Weight
- 2.0–2.5 t
- Period
- Cretaceous
- Time range
- 76.6–75.1 Ma
Discovery Information
- First Discovery
- 1913
- Described by
- Lawrence Lambe
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Saurischia
- Family
- Tyrannosauridae
- Genus
- Gorgosaurus
- Species
- G. libratus
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
- NMC 2120
- Type locality
- Dinosaur Park Formation, Alberta, Canada