Jurassic
Coelurus
Coelurus fragilis
The catalogue presents Coelurus as a carnivore member of Coeluridae that lived during the Jurassic, between 154.0–150.8 Ma. Its estimated range is 1.8–2.5 m in length and 13–20 kg in mass, giving a practical sense of scale. Reference material comes from Morrison Formation, Wyoming, USA. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Coelurus, the PBDB records the taxonomic attribution as Marsh (1879).
The PBDB places it in Coelurosauria, and the catalogue record assigns it to the family Coeluridae.
- PBDB · taxon.parent
- Coeluridae
The PBDB catalogues 6 occurrences, with material from the Morrison Formation (6). Provenance: United States.
The catalogue records the holotype as YPM 1991 and the type locality as “Morrison Formation, Wyoming, USA”.
- YPM 1991
- Morrison Formation, Wyoming, USA
The catalogue's reference measurements are 1.8–2.5 m in length and 13–20 kg in mass — estimates, which vary with specimen and method.
- 1.8-2.5 m
- 13-20 kg
The record gathers 68 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
- 1.8–2.5 m
- Weight
- 13–20 kg
- Period
- Jurassic
- Time range
- 154.0–150.8 Ma
Discovery Information
- First Discovery
- 1879
- Described by
- Othniel Charles Marsh
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Saurischia
- Family
- Coeluridae
- Genus
- Coelurus
- Species
- f. fragilis
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
- YPM 1991
- Type locality
- Morrison Formation, Wyoming, USA