Cretaceous
Alxasaurus
Alxasaurus elesitaiensis
The catalogue presents Alxasaurus as a herbivore member of Alxasauridae that lived during the Cretaceous, between 112 Ma. Its estimated range is 4.0 m in length and 380 kg in mass, giving a practical sense of scale. Reference material comes from Inner Mongolia, China. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Alxasaurus, the PBDB records the taxonomic attribution as Russell and Dong (1994).
The PBDB places it in Therizinosauroidea, and the catalogue record assigns it to the family Alxasauridae.
- PBDB · taxon.parent
- Alxasauridae
In the PBDB record, the reported stratigraphic range is the Aptian.
The PBDB catalogues 1 occurrence, with material from the Bayangobi Formation (1). Provenance: China.
The catalogue records the holotype as IVPP V9612 and the type locality as “Inner Mongolia, China”.
- IVPP V9612
- Inner Mongolia, China
The catalogue's reference measurements are 4.0 m in length and 380 kg in mass — estimates, which vary with specimen and method.
- 4.0 m
- 380 kg
The record gathers 16 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
- 4.0 m
- Weight
- 380 kg
- Period
- Cretaceous
- Time range
- 112 Ma
Discovery Information
- First Discovery
- 1993
- Described by
- Dale Russell & Dong Zhiming
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Saurischia
- Family
- Alxasauridae
- Genus
- Alxasaurus
- Species
- A. elesitaiensis
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
- IVPP V9612
- Type locality
- Inner Mongolia, China