Cretaceous
Secernosaurus
Secernosaurus koerneri
The catalogue presents Secernosaurus as a herbivore member of Hadrosauridae that lived during the Cretaceous, between 72.2–70.0 Ma. Its estimated range is 5.0–7.0 m in length and 500–800 kg in mass, giving a practical sense of scale. Reference material comes from Lago Colhue-Huapi Formation, Patagonia, Argentina. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Secernosaurus, the PBDB records the taxonomic attribution as Brett-Surman (1979).
The PBDB places it in Kritosaurini, and the catalogue record assigns it to the family Hadrosauridae.
- PBDB · taxon.parent
- Hadrosauridae
In the PBDB record, the reported stratigraphic range is the Maastrichtian.
The PBDB catalogues 1 occurrence, with material from the Lago Colhué Huapi Formation (1). Provenance: Argentina.
The catalogue records the holotype as FMNH P13426 and the type locality as “Lago Colhue-Huapi Formation, Patagonia, Argentina”.
- FMNH P13426
- Lago Colhue-Huapi Formation, Patagonia, Argentina
The catalogue's reference measurements are 5.0–7.0 m in length and 500–800 kg in mass — estimates, which vary with specimen and method.
- 5.0-7.0 m
- 500-800 kg
The record gathers 25 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
- 5.0–7.0 m
- Weight
- 500–800 kg
- Period
- Cretaceous
- Time range
- 72.2–70.0 Ma
Discovery Information
- First Discovery
- 1979
- Described by
- Brett-Surman
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Ornithischia
- Family
- Hadrosauridae
- Genus
- Secernosaurus
- Species
- k. koerneri
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
- FMNH P13426
- Type locality
- Lago Colhue-Huapi Formation, Patagonia, Argentina