Cretaceous
Oxalaia
Oxalaia quilombensis
The catalogue presents Oxalaia as a carnivore member of Spinosauridae that lived during the Cretaceous, between 100.5–93.9 Ma. Its estimated range is 12.0–14.0 m in length and 4.0–7.0 t in mass, giving a practical sense of scale. Reference material comes from Itapecuru Formation, Maranhão, Brasil. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Oxalaia, the PBDB records the taxonomic attribution as Kellner et al. (2011).
The PBDB places it in Spinosaurinae, and the catalogue record assigns it to the family Spinosauridae.
- PBDB · taxon.parent
- Spinosauridae
In the PBDB record, the reported stratigraphic range is the Cenomanian.
The PBDB catalogues 1 occurrence, with material from the Alcântara Formation (1). Provenance: Brazil.
The catalogue records the holotype as MPSC R 2094 and the type locality as “Itapecuru Formation, Maranhão, Brasil”.
- MPSC R 2094
- Itapecuru Formation, Maranhão, Brasil
The catalogue's reference measurements are 12.0–14.0 m in length and 4.0–7.0 t in mass — estimates, which vary with specimen and method.
- 12.0-14.0 m
- 4.0-7.0 tons
The record gathers 6 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
- 12.0–14.0 m
- Weight
- 4.0–7.0 t
- Period
- Cretaceous
- Time range
- 100.5–93.9 Ma
Discovery Information
- First Discovery
- 2011
- Described by
- Kellner et al.
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Saurischia
- Family
- Spinosauridae
- Genus
- Oxalaia
- Species
- O. quilombensis
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
- MPSC R 2094
- Type locality
- Itapecuru Formation, Maranhão, Brasil