Jurassic
Miragaia
Miragaia longicollum
The catalogue presents Miragaia as a herbivore member of Stegosauridae that lived during the Jurassic, between 150.8–145.0 Ma. Its estimated range is 5.5–6.0 m in length and 1.5–2.0 t in mass, giving a practical sense of scale. Reference material comes from Lourinhã Formation, Portugal. Size and mass are approximations and may change with new fossils or methods.
Evidence-backed summary
For Miragaia, the PBDB records the taxonomic attribution as Mateus et al. (2009).
The PBDB places it in Dacentrurinae, and the catalogue record assigns it to the family Stegosauridae.
- PBDB · taxon.parent
- Stegosauridae
In the PBDB record, the reported stratigraphic range runs from the Kimmeridgian to the Barremian.
The PBDB catalogues 2 occurrences, with material from the Lourinhã Formation (2). Provenance: Portugal.
The catalogue records the holotype as ML 433 and the type locality as “Lourinhã Formation, Portugal”.
- ML 433
- Lourinhã Formation, Portugal
The catalogue's reference measurements are 5.5–6.0 m in length and 1.5–2.0 t in mass — estimates, which vary with specimen and method.
- 5.5-6.0 m
- 1.5-2.0 tons
The record gathers 6 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
- 5.5–6.0 m
- Weight
- 1.5–2.0 t
- Period
- Jurassic
- Time range
- 150.8–145.0 Ma
Discovery Information
- First Discovery
- 2009
- Described by
- Mateus et al.
Taxonomic Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Ornithischia
- Family
- Stegosauridae
- Genus
- Miragaia
- Species
- M. longicollum
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
- ML 433
- Type locality
- Lourinhã Formation, Portugal