Cretaceous
Zuul
Zuul crurivastator
The catalogue presents Zuul as a herbivore member of Ankylosauridae that lived during the Cretaceous, between 76.5–75.0 Ma. Its estimated range is 6.0–7.0 m in length and 2.5–3.5 t in mass, giving a practical sense of scale. Reference material comes from Judith River Formation, Montana, USA. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Zuul, the PBDB records the taxonomic attribution as Arbour and Evans (2017).
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 is the Campanian.
The PBDB catalogues 1 occurrence, with material from the Judith River Formation (1). Provenance: United States.
The catalogue records the holotype as ROM 75860 and the type locality as “Judith River Formation, Montana, USA”.
- ROM 75860
- Judith River Formation, Montana, USA
The catalogue's reference measurements are 6.0–7.0 m in length and 2.5–3.5 t in mass — estimates, which vary with specimen and method.
- 6.0-7.0 m
- 2.5-3.5 tons
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
- 6.0–7.0 m
- Weight
- 2.5–3.5 t
- Period
- Cretaceous
- Time range
- 76.5–75.0 Ma
Discovery Information
- First Discovery
- 2016
- Described by
- Arbour & Evans
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Ornithischia
- Family
- Ankylosauridae
- Genus
- Zuul
- Species
- c. crurivastator
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
- ROM 75860
- Type locality
- Judith River Formation, Montana, USA