Cretaceous
Wannanosaurus
Wannanosaurus yansiensis
The catalogue presents Wannanosaurus as a herbivore member of Pachycephalosauridae that lived during the Cretaceous, between 83.0–72.0 Ma. Its estimated range is 0.6 m in length and 1–2 kg in mass, giving a practical sense of scale. Reference material comes from Xiaoyan Formation, Anhui, China. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Wannanosaurus, the PBDB records the taxonomic attribution as Hou (1977).
The PBDB places it in Pachycephalosauria, and the catalogue record assigns it to the family Pachycephalosauridae.
- PBDB · taxon.parent
- Pachycephalosauridae
In the PBDB record, the reported stratigraphic range is the Maastrichtian.
The PBDB catalogues 1 occurrence, with material from the Xiaoyan Formation (1). Provenance: China.
The catalogue records the holotype as IVPP V4447 and the type locality as “Xiaoyan Formation, Anhui, China”.
- IVPP V4447
- Xiaoyan Formation, Anhui, China
The catalogue's reference measurements are 0.6 m in length and 1–2 kg in mass — estimates, which vary with specimen and method.
- 0.6 m
- 1-2 kg
The record gathers 27 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
- 0.6 m
- Weight
- 1–2 kg
- Period
- Cretaceous
- Time range
- 83.0–72.0 Ma
Discovery Information
- First Discovery
- 1977
- Described by
- Hou Lian-hai
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Ornithischia
- Family
- Pachycephalosauridae
- Genus
- Wannanosaurus
- Species
- W. yansiensis
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
- IVPP V4447
- Type locality
- Xiaoyan Formation, Anhui, China