Cretaceous
Archaeornithomimus
Archaeornithomimus asiaticus
The catalogue presents Archaeornithomimus as a omnivore member of Ornithomimidae that lived during the Cretaceous, between 90.0–75.0 Ma. Its estimated range is 3.5 m in length and 80–100 kg in mass, giving a practical sense of scale. Reference material comes from Iren Dabasu Formation, Inner Mongolia, China. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Archaeornithomimus, the PBDB records the taxonomic attribution as Russell (1972).
The PBDB places it in Ornithomimidae, and the catalogue record assigns it to the family Ornithomimidae.
- PBDB · taxon.parent
- Ornithomimidae
In the PBDB record, the reported stratigraphic range runs from the Coniacian to the Campanian.
The PBDB catalogues 3 occurrences, with material from the Iren Dabasu Formation (2) and from the Dabrazhin Formation (1). Provenance: China and Kazakhstan.
The catalogue records the holotype as AMNH 6567 and the type locality as “Iren Dabasu Formation, Inner Mongolia, China”.
- AMNH 6567
- Iren Dabasu Formation, Inner Mongolia, China
The catalogue's reference measurements are 3.5 m in length and 80–100 kg in mass — estimates, which vary with specimen and method.
- 3.5 m
- 80-100 kg
The record gathers 32 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
- 3.5 m
- Weight
- 80–100 kg
- Period
- Cretaceous
- Time range
- 90.0–75.0 Ma
Discovery Information
- First Discovery
- 1933
- Described by
- Charles Gilmore
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Saurischia
- Family
- Ornithomimidae
- Genus
- Archaeornithomimus
- Species
- A. asiaticus
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
- AMNH 6567
- Type locality
- Iren Dabasu Formation, Inner Mongolia, China