Cretaceous
Animantarx
Animantarx ramaljonesi
The catalogue presents Animantarx as a herbivore member of Nodosauridae that lived during the Cretaceous, between 121.4–121.4 Ma. Its estimated range is 3.0 m in length and 400–600 kg in mass, giving a practical sense of scale. Reference material comes from Cedar Mountain Formation, Utah, USA. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Animantarx, the PBDB records the taxonomic attribution as Carpenter et al. (1999).
The PBDB places it in Nodosauridae, and the catalogue record assigns it to the family Nodosauridae.
- PBDB · taxon.parent
- Nodosauridae
In the PBDB record, the reported stratigraphic range runs from the Aptian to the Albian.
The PBDB catalogues 1 occurrence, with material from the Cedar Mountain Formation (1). Provenance: United States.
The catalogue records the holotype as CEUM 8600 and the type locality as “Cedar Mountain Formation, Utah, USA”.
- CEUM 8600
- Cedar Mountain Formation, Utah, USA
The catalogue's reference measurements are 3.0 m in length and 400–600 kg in mass — estimates, which vary with specimen and method.
- 3.0 m
- 400-600 kg
The record gathers 14 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
- 3.0 m
- Weight
- 400–600 kg
- Period
- Cretaceous
- Time range
- 121.4–121.4 Ma
Discovery Information
- First Discovery
- 1999
- Described by
- Carpenter et al.
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Ornithischia
- Family
- Nodosauridae
- Genus
- Animantarx
- Species
- A. ramaljonesi
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
- CEUM 8600
- Type locality
- Cedar Mountain Formation, Utah, USA