Cretaceous
Edmontonia
Edmontonia longiceps
The catalogue presents Edmontonia as a herbivore member of Nodosauridae that lived during the Cretaceous, between 76.5 Ma. Its estimated range is 6.6 m in length and 3.5 t in mass, giving a practical sense of scale. Reference material comes from Alberta, Canada. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Edmontonia, the PBDB records the taxonomic attribution as Sternberg (1928).
The PBDB places it in Nodosauridae, and the catalogue record assigns it to the family Nodosauridae.
- PBDB · taxon.parent
- Nodosauridae
In the PBDB record, the reported stratigraphic range runs from the Campanian to the Maastrichtian.
The PBDB catalogues 4 occurrences, with material from the Judith River Formation (1), from the St. Mary River Formation (1) and from the Lance Formation (1). Provenance: United States and Canada.
The catalogue records the holotype as AMNH 5381 and the type locality as “Alberta, Canada”.
- AMNH 5381
- Alberta, Canada
The catalogue's reference measurements are 6.6 m in length and 3.5 t in mass — estimates, which vary with specimen and method.
- 6.6 m
- 3.5 tons
The record gathers 75 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
- 6.6 m
- Weight
- 3.5 t
- Period
- Cretaceous
- Time range
- 76.5 Ma
Discovery Information
- First Discovery
- 1928
- Described by
- Charles M. Sternberg
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Ornithischia
- Family
- Nodosauridae
- Genus
- Edmontonia
- Species
- E. longiceps
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
- AMNH 5381
- Type locality
- Alberta, Canada