Jurassic
Omeisaurus
Omeisaurus tianfuensis
The catalogue presents Omeisaurus as a herbivore member of Mamenchisauridae that lived during the Jurassic, between 163 Ma. Its estimated range is 20.0 m in length and 10 t in mass, giving a practical sense of scale. Reference material comes from Sichuan, China. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Omeisaurus, the PBDB records the taxonomic attribution as Young (1939).
The PBDB places it in Mamenchisauridae, and the catalogue record assigns it to the family Mamenchisauridae.
- PBDB · taxon.parent
- Mamenchisauridae
In the PBDB record, the reported stratigraphic range runs from the Aalenian to the Tithonian.
The PBDB catalogues 1 occurrence, with material from the Shaximiao Formation (1). Provenance: China.
The catalogue records the holotype as ZDM T5701 and the type locality as “Sichuan, China”.
- ZDM T5701
- Sichuan, China
The catalogue's reference measurements are 20.0 m in length and 10 t in mass — estimates, which vary with specimen and method.
- 20.0 m
- 10 tons
The record gathers 60 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
- 20.0 m
- Weight
- 10 t
- Period
- Jurassic
- Time range
- 163 Ma
Discovery Information
- First Discovery
- 1939
- Described by
- C.C. Young
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Saurischia
- Family
- Mamenchisauridae
- Genus
- Omeisaurus
- Species
- O. tianfuensis
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
- ZDM T5701
- Type locality
- Sichuan, China