Cretaceous
Homalocephale
Homalocephale calathocercos
The catalogue presents Homalocephale as a herbivore member of Homalocephalidae that lived during the Cretaceous, between 72.2–66.0 Ma. Its estimated range is 1.5 m in length and 10–20 kg in mass, giving a practical sense of scale. Reference material comes from Nemegt Formation, Mongolia. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Homalocephale, the PBDB records the taxonomic attribution as Maryańska and Osmólska (1974).
The PBDB places it in Eupachycephalosauria, and the catalogue record assigns it to the family Homalocephalidae.
- PBDB · taxon.parent
- Homalocephalidae
In the PBDB record, the reported stratigraphic range is the Maastrichtian.
The PBDB catalogues 2 occurrences, with material from the Nemegt Formation (2). Provenance: Mongolia.
The catalogue records the holotype as ZPAL MgD-I/105 and the type locality as “Nemegt Formation, Mongolia”.
- ZPAL MgD-I/105
- Nemegt Formation, Mongolia
The catalogue's reference measurements are 1.5 m in length and 10–20 kg in mass — estimates, which vary with specimen and method.
- 1.5 m
- 10-20 kg
The record gathers 30 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
- 1.5 m
- Weight
- 10–20 kg
- Period
- Cretaceous
- Time range
- 72.2–66.0 Ma
Discovery Information
- First Discovery
- 1974
- Described by
- Maryańska & Osmólska
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Ornithischia
- Family
- Homalocephalidae
- Genus
- Homalocephale
- Species
- H. calathocercos
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
- ZPAL MgD-I/105
- Type locality
- Nemegt Formation, Mongolia