Cretaceous
Kritosaurus
Kritosaurus navajovius
The catalogue presents Kritosaurus as a herbivore member of Hadrosauridae that lived during the Cretaceous, between 74.0–72.0 Ma. Its estimated range is 8.5–10.0 m in length and 2.5–3.0 t in mass, giving a practical sense of scale. Reference material comes from Kirtland Formation, New Mexico, USA. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Kritosaurus, the PBDB records the taxonomic attribution as Brown (1910).
The PBDB places it in Kritosaurini, 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 Santonian to the Maastrichtian.
The PBDB catalogues 7 occurrences, with material from the Kirtland Formation (5) and from the Fruitland Formation (2). Provenance: United States.
The catalogue records the holotype as AMNH 5799 and the type locality as “Kirtland Formation, New Mexico, USA”.
- AMNH 5799
- Kirtland Formation, New Mexico, USA
The catalogue's reference measurements are 8.5–10.0 m in length and 2.5–3.0 t in mass — estimates, which vary with specimen and method.
- 8.5-10.0 m
- 2.5-3.0 tons
The record gathers 86 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
- 8.5–10.0 m
- Weight
- 2.5–3.0 t
- Period
- Cretaceous
- Time range
- 74.0–72.0 Ma
Discovery Information
- First Discovery
- 1910
- Described by
- Barnum Brown
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Ornithischia
- Family
- Hadrosauridae
- Genus
- Kritosaurus
- Species
- K. navajovius
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 5799
- Type locality
- Kirtland Formation, New Mexico, USA