Cretaceous
Baryonyx
Baryonyx walkeri
The catalogue presents Baryonyx as a carnivore member of Spinosauridae that lived during the Cretaceous, between 130.0–125.0 Ma. Its estimated range is 7.5–10.0 m in length and 1.2–1.9 t in mass, giving a practical sense of scale. Reference material comes from Weald Clay Formation, Surrey, England. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Baryonyx, the PBDB records the taxonomic attribution as Charig and Milner (1986).
The PBDB places it in Baryonychinae, and the catalogue record assigns it to the family Spinosauridae.
- PBDB · taxon.parent
- Spinosauridae
In the PBDB record, the reported stratigraphic range runs from the Berriasian to the Albian.
The PBDB catalogues 2 occurrences, with material from the Weald Clay Formation (2). Provenance: United Kingdom.
The catalogue records the holotype as BMNH R9951 and the type locality as “Weald Clay Formation, Surrey, England”.
- BMNH R9951
- Weald Clay Formation, Surrey, England
The catalogue's reference measurements are 7.5–10.0 m in length and 1.2–1.9 t in mass — estimates, which vary with specimen and method.
- 7.5-10.0 m
- 1.2-1.9 tons
The record gathers 58 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
- 7.5–10.0 m
- Weight
- 1.2–1.9 t
- Period
- Cretaceous
- Time range
- 130.0–125.0 Ma
Discovery Information
- First Discovery
- 1983
- Described by
- William Walker
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Saurischia
- Family
- Spinosauridae
- Genus
- Baryonyx
- Species
- B. walkeri
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
- BMNH R9951
- Type locality
- Weald Clay Formation, Surrey, England