Cretaceous
Tarchia
Tarchia gigantea
The catalogue presents Tarchia as a herbivore member of Ankylosauridae that lived during the Cretaceous, between 75.0–70.0 Ma. Its estimated range is 8.0–10.0 m in length and 2.0–3.0 t in mass, giving a practical sense of scale. Reference material comes from Nemegt Formation, Mongolia. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Tarchia, the PBDB records the taxonomic attribution as Maryanska (1977).
The PBDB places it in Ankylosaurinae, and the catalogue record assigns it to the family Ankylosauridae.
- PBDB · taxon.parent
- Ankylosauridae
In the PBDB record, the reported stratigraphic range runs from the Campanian to the Maastrichtian.
The catalogue records the holotype as GIN 100/45 and the type locality as “Nemegt Formation, Mongolia”.
- GIN 100/45
- Nemegt Formation, Mongolia
The catalogue's reference measurements are 8.0–10.0 m in length and 2.0–3.0 t in mass — estimates, which vary with specimen and method.
- 8.0-10.0 m
- 2.0-3.0 tons
The record gathers 27 bibliographic references registered in the PBDB, listed below.
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
- 8.0–10.0 m
- Weight
- 2.0–3.0 t
- Period
- Cretaceous
- Time range
- 75.0–70.0 Ma
Discovery Information
- First Discovery
- 1977
- Described by
- Teresa Maryańska
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Ornithischia
- Family
- Ankylosauridae
- Genus
- Tarchia
- Species
- T. gigantea
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
- GIN 100/45
- Type locality
- Nemegt Formation, Mongolia