Cretaceous
Amargasaurus
Amargasaurus cazaui
The catalogue presents Amargasaurus as a herbivore member of Dicraeosauridae that lived during the Cretaceous, between 130.0–125.0 Ma. Its estimated range is 9.0–10.0 m in length and 2.6–4.0 t in mass, giving a practical sense of scale. Reference material comes from La Amarga Formation, Argentina. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Amargasaurus, the PBDB records the taxonomic attribution as Bonaparte (1984).
The PBDB places it in Dicraeosaurinae, and the catalogue record assigns it to the family Dicraeosauridae.
- PBDB · taxon.parent
- Dicraeosauridae
In the PBDB record, the reported stratigraphic range is the Barremian.
The PBDB catalogues 2 occurrences, with material from the La Amarga Formation (2). Provenance: Argentina.
The catalogue records the holotype as MACN-N 15 and the type locality as “La Amarga Formation, Argentina”.
- MACN-N 15
- La Amarga Formation, Argentina
The catalogue's reference measurements are 9.0–10.0 m in length and 2.6–4.0 t in mass — estimates, which vary with specimen and method.
- 9.0-10.0 m
- 2.6-4.0 tons
The record gathers 44 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
- 9.0–10.0 m
- Weight
- 2.6–4.0 t
- Period
- Cretaceous
- Time range
- 130.0–125.0 Ma
Discovery Information
- First Discovery
- 1991
- Described by
- José Bonaparte
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Saurischia
- Family
- Dicraeosauridae
- Genus
- Amargasaurus
- Species
- A. cazaui
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
- MACN-N 15
- Type locality
- La Amarga Formation, Argentina