Cretaceous
Jaxartosaurus
Jaxartosaurus aralensis
The catalogue presents Jaxartosaurus as a herbivore member of Hadrosauridae that lived during the Cretaceous, between 90.0–85.0 Ma. Its estimated range is 7.0–9.0 m in length and 2.0–3.0 t in mass, giving a practical sense of scale. Reference material comes from Beleutininskaya Formation, Kazakhstan. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Jaxartosaurus, the PBDB records the taxonomic attribution as Riabinin (1937).
The PBDB places it in Lambeosaurinae, 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 Santonian.
The PBDB catalogues 1 occurrence, with material from the Dabrazhin Formation (1). Provenance: Kazakhstan.
The catalogue records the holotype as PIN 252/1 and the type locality as “Beleutininskaya Formation, Kazakhstan”.
- PIN 252/1
- Beleutininskaya Formation, Kazakhstan
The catalogue's reference measurements are 7.0–9.0 m in length and 2.0–3.0 t in mass — estimates, which vary with specimen and method.
- 7.0-9.0 m
- 2.0-3.0 tons
The record gathers 42 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
- 7.0–9.0 m
- Weight
- 2.0–3.0 t
- Period
- Cretaceous
- Time range
- 90.0–85.0 Ma
Discovery Information
- First Discovery
- 1937
- Described by
- Anatoly Ryabinin
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Ornithischia
- Family
- Hadrosauridae
- Genus
- Jaxartosaurus
- Species
- J. aralensis
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
- PIN 252/1
- Type locality
- Beleutininskaya Formation, Kazakhstan