Cretaceous
Antarctosaurus
Antarctosaurus wichmannianus
The catalogue presents Antarctosaurus as a herbivore member of Antarctosauridae that lived during the Cretaceous, between 86.0–72.0 Ma. Its estimated range is 18.0–23.0 m in length and 34.0–69.0 t in mass, giving a practical sense of scale. Reference material comes from Anacleto Formation, Río Negro, Argentina. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Antarctosaurus, the PBDB records the taxonomic attribution as Huene (1927).
The PBDB places it in Lithostrotia, and the catalogue record assigns it to the family Antarctosauridae.
- PBDB · taxon.parent
- Antarctosauridae
In the PBDB record, the reported stratigraphic range runs from the Coniacian to the Maastrichtian.
The PBDB catalogues 2 occurrences, with material from the Anacleto Formation (1) and from the Asencio Formation (1). Provenance: Argentina and Uruguay.
The catalogue records the holotype as MLP 26-316 and the type locality as “Anacleto Formation, Río Negro, Argentina”.
- MLP 26-316
- Anacleto Formation, Río Negro, Argentina
The catalogue's reference measurements are 18.0–23.0 m in length and 34.0–69.0 t in mass — estimates, which vary with specimen and method.
- 18.0-23.0 m
- 34.0-69.0 tons
The record gathers 54 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
- 18.0–23.0 m
- Weight
- 34.0–69.0 t
- Period
- Cretaceous
- Time range
- 86.0–72.0 Ma
Discovery Information
- First Discovery
- 1929
- Described by
- Friedrich von Huene
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Saurischia
- Family
- Antarctosauridae
- Genus
- Antarctosaurus
- Species
- A. wichmannianus
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
- MLP 26-316
- Type locality
- Anacleto Formation, Río Negro, Argentina