Cretaceous
Chasmosaurus
Chasmosaurus belli
The catalogue presents Chasmosaurus as a herbivore member of Ceratopsidae that lived during the Cretaceous, between 76.5 Ma. Its estimated range is 5.0 m in length and 2 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 Chasmosaurus, the PBDB records the taxonomic attribution as Lambe (1914).
The PBDB places it in Chasmosaurinae, and the catalogue record assigns it to the family Ceratopsidae.
- PBDB · taxon.parent
- Ceratopsidae
In the PBDB record, the reported stratigraphic range is the Campanian.
The PBDB catalogues 7 occurrences, with material from the Dinosaur Park Formation (7). Provenance: Canada.
The catalogue records the holotype as CMN 491 and the type locality as “Alberta, Canada”.
- CMN 491
- Alberta, Canada
The catalogue's reference measurements are 5.0 m in length and 2 t in mass — estimates, which vary with specimen and method.
- 5.0 m
- 2 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
- 5.0 m
- Weight
- 2 t
- Period
- Cretaceous
- Time range
- 76.5 Ma
Discovery Information
- First Discovery
- 1914
- Described by
- Lawrence Lambe
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Ornithischia
- Family
- Ceratopsidae
- Genus
- Chasmosaurus
- Species
- C. belli
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 491
- Type locality
- Alberta, Canada