Cretaceous
Sinornithoides
Sinornithoides youngi
The catalogue presents Sinornithoides as a carnivore member of Troodontidae that lived during the Cretaceous, between 137.1–100.5 Ma. Its estimated range is 1.1 m in length and 2–3 kg in mass, giving a practical sense of scale. Reference material comes from Ejinhoro Formation, Ordos Basin, Inner Mongolia, China. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Sinornithoides, the PBDB records the taxonomic attribution as Russell and Dong (1994).
The PBDB places it in Troodontinae, and the catalogue record assigns it to the family Troodontidae.
- PBDB · taxon.parent
- Troodontidae
In the PBDB record, the reported stratigraphic range is the Albian.
The PBDB catalogues 1 occurrence, with material from the Ejinhoro Formation (1). Provenance: China.
The catalogue records the holotype as IVPP V9612 and the type locality as “Ejinhoro Formation, Ordos Basin, Inner Mongolia, China”.
- IVPP V9612
- Ejinhoro Formation, Ordos Basin, Inner Mongolia, China
The catalogue's reference measurements are 1.1 m in length and 2–3 kg in mass — estimates, which vary with specimen and method.
- 1.1 m
- 2-3 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
- 1.1 m
- Weight
- 2–3 kg
- Period
- Cretaceous
- Time range
- 137.1–100.5 Ma
Discovery Information
- First Discovery
- 1993
- Described by
- Dale Russell & Dong Zhiming
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Saurischia
- Family
- Troodontidae
- Genus
- Sinornithoides
- Species
- S. youngi
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 V9612
- Type locality
- Ejinhoro Formation, Ordos Basin, Inner Mongolia, China