Cretaceous
Edmontosaurus
Edmontosaurus regalis
The catalogue presents Edmontosaurus as a herbivore member of Hadrosauridae that lived during the Cretaceous, between 73.0–66.0 Ma. Its estimated range is 12.0–13.0 m in length and 4.0–4.5 t in mass, giving a practical sense of scale. Reference material comes from Horseshoe Canyon Formation, Alberta, Canada. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Edmontosaurus, the PBDB records the taxonomic attribution as Lambe (1917).
The PBDB places it in Edmontosaurini, and the catalogue record assigns it to the family Hadrosauridae.
- PBDB · taxon.parent
- Hadrosauridae
In the PBDB record, the reported stratigraphic range runs from the Coniacian to the Maastrichtian.
The PBDB catalogues 10 occurrences, with material from the Horseshoe Canyon Formation (8), from the Laramie Formation (1) and from the St. Mary River Formation (1). Provenance: Canada and United States.
The catalogue records the holotype as CMN 2288 and the type locality as “Horseshoe Canyon Formation, Alberta, Canada”.
- CMN 2288
- Horseshoe Canyon Formation, Alberta, Canada
The catalogue's reference measurements are 12.0–13.0 m in length and 4.0–4.5 t in mass — estimates, which vary with specimen and method.
- 12.0-13.0 m
- 4.0-4.5 tons
The record gathers 106 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
- 12.0–13.0 m
- Weight
- 4.0–4.5 t
- Period
- Cretaceous
- Time range
- 73.0–66.0 Ma
Discovery Information
- First Discovery
- 1917
- Described by
- Lawrence Lambe
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Ornithischia
- Family
- Hadrosauridae
- Genus
- Edmontosaurus
- Species
- E. regalis
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
- CMN 2288
- Type locality
- Horseshoe Canyon Formation, Alberta, Canada