Cretaceous
Alamosaurus
Alamosaurus sanjuanensis
The catalogue presents Alamosaurus as a herbivore member of Titanosauridae that lived during the Cretaceous, between 69–66 Ma. Its estimated range is 30.0 m in length and 30 t in mass, giving a practical sense of scale. Reference material comes from New Mexico, USA. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Alamosaurus, the PBDB records the taxonomic attribution as Gilmore (1922).
The PBDB places it in Saltasaurinae, and the catalogue record assigns it to the family Titanosauridae.
- PBDB · taxon.parent
- Titanosauridae
In the PBDB record, the reported stratigraphic range runs from the Campanian to the Maastrichtian.
The PBDB catalogues 31 occurrences, with material from the Ojo Alamo Formation (15), from the Javelina Formation (7) and from the Kirtland Formation (4). Provenance: United States and Mexico.
The catalogue records the holotype as USNM 10486 and the type locality as “New Mexico, USA”.
- USNM 10486
- New Mexico, USA
The catalogue's reference measurements are 30.0 m in length and 30 t in mass — estimates, which vary with specimen and method.
- 30.0 m
- 30 tons
The record gathers 80 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
- 30.0 m
- Weight
- 30 t
- Period
- Cretaceous
- Time range
- 69–66 Ma
Discovery Information
- First Discovery
- 1922
- Described by
- Charles Whitney Gilmore
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Saurischia
- Family
- Titanosauridae
- Genus
- Alamosaurus
- Species
- A. sanjuanensis
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
- USNM 10486
- Type locality
- New Mexico, USA