Cretaceous
Stegouros
Stegouros elengassen
The catalogue presents Stegouros as a herbivore member of Ankylosauria incertae sedis that lived during the Cretaceous, between 74.0–71.0 Ma. Its estimated range is 2.0–2.5 m in length and 150–200 kg in mass, giving a practical sense of scale. Reference material comes from Dorotea Formation, Magallanes, Chile. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Stegouros, the PBDB records the taxonomic attribution as Soto-Acuña et al. (2021).
The PBDB places it in Parankylosauria, and the catalogue record assigns it to the family Ankylosauria incertae sedis.
- PBDB · taxon.parent
- Ankylosauria incertae sedis
In the PBDB record, the reported stratigraphic range runs from the Campanian to the Maastrichtian.
The PBDB catalogues 1 occurrence, with material from the Dorotea Formation (1). Provenance: Chile.
The catalogue records the holotype as CPAP 200 and the type locality as “Dorotea Formation, Magallanes, Chile”.
- CPAP 200
- Dorotea Formation, Magallanes, Chile
The catalogue's reference measurements are 2.0–2.5 m in length and 150–200 kg in mass — estimates, which vary with specimen and method.
- 2.0-2.5 m
- 150-200 kg
The record gathers 2 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
- 2.0–2.5 m
- Weight
- 150–200 kg
- Period
- Cretaceous
- Time range
- 74.0–71.0 Ma
Discovery Information
- First Discovery
- 2021
- Described by
- Soto-Acuña et al.
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Ornithischia
- Family
- Ankylosauria incertae sedis
- Genus
- Stegouros
- Species
- e. elengassen
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
- CPAP 200
- Type locality
- Dorotea Formation, Magallanes, Chile