Cretaceous
Lythronax
Lythronax argestes
The catalogue presents Lythronax as a carnivore member of Tyrannosauridae that lived during the Cretaceous, between 80 Ma. Its estimated range is 8.0 m in length and 2.5 t in mass, giving a practical sense of scale. Reference material comes from Utah, USA. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Lythronax, the PBDB records the taxonomic attribution as Loewen et al. (2013).
The PBDB places it in Tyrannosaurinae, and the catalogue record assigns it to the family Tyrannosauridae.
- PBDB · taxon.parent
- Tyrannosauridae
In the PBDB record, the reported stratigraphic range is the Campanian.
The PBDB catalogues 1 occurrence, with material from the Wahweap Formation (1). Provenance: United States.
The catalogue records the holotype as UMNH VP 20200 and the type locality as “Utah, USA”.
- UMNH VP 20200
- Utah, USA
The catalogue's reference measurements are 8.0 m in length and 2.5 t in mass — estimates, which vary with specimen and method.
- 8.0 m
- 2.5 tons
The record gathers 4 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
- 8.0 m
- Weight
- 2.5 t
- Period
- Cretaceous
- Time range
- 80 Ma
Discovery Information
- First Discovery
- 2013
- Described by
- Mark Loewen et al.
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Saurischia
- Family
- Tyrannosauridae
- Genus
- Lythronax
- Species
- L. argestes
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
- UMNH VP 20200
- Type locality
- Utah, USA