Age constraints on the dispersal of dinosaurs in the Late Triassic from magnetochronology of the Los Colorados Formation (Argentina)
www.pnas.org
Granskad: 2026-09-04
VERIFY:period_start_mya: stored=221 suggested=227 confidence=medium — Magnetostratigraphic correlation of the Los Colorados Formation, the unit that yields Riojasaurus incertus (holotype PVL 3808, La Esquina), constrains the whole ~600 m section to 227–213 Ma, so the base of the taxon's range is older than the stored 221 Ma. Palaeobiology Database range data for the genus (228–209 Ma) is likewise older at the base.
Öppna källa ↗Age constraints on the dispersal of dinosaurs in the Late Triassic from magnetochronology of the Los Colorados Formation (Argentina)
www.pnas.org
Granskad: 2026-09-04
VERIFY:period_end_mya: stored=206 suggested=213 confidence=high — Kent et al. (2014) date the Los Colorados Formation to 227–213 Ma and state deposition ended more than 11 Myr before the onset of the Jurassic, so a stored end date of 206 Ma is younger than any horizon that produces Riojasaurus. Subsequent stratigraphic work on the formation (e.g. Ischigualasto–Villa Unión Basin fluvial architecture studies) continues to follow the Norian ~227–213 Ma calibration rather than the older Norian–Rhaetian biostratigraphic estimate.
Öppna källa ↗PBDB Taxon: Riojasaurus incertus (taxon no. 56585)
Paleobiology Database
Granskad: 2026-09-04
Paleobiology Database taxon record giving the formal classification of Riojasaurus incertus within Dinosauria, Saurischia, Sauropodomorpha and Riojasauridae.
Öppna källa ↗Tetrapod association and palaeoenvironment of the Los Colorados Formation (Argentina): a significant sample from Western Gondwana at the end of the Triassic
Geobios (Elsevier)
Granskad: 2026-09-04
Peer-reviewed study documenting the fossil localities and stratigraphic distribution of the Los Colorados Formation tetrapods, including Riojasaurus, in La Rioja Province, north-western Argentina.
Öppna källa ↗Riojasaurus incertus Bonaparte 1969 (sauropodomorph)
Paleobiology Database
Granskad: 2026-09-04
Taxon page recording the collections, environments and Norian-age Los Colorados Formation fluvial-floodplain settings from which Riojasaurus specimens derive.
Öppna källa ↗Herbivorous or omnivorous dinosaurs — Dino Directory
Natural History Museum, London
Granskad: 2026-09-04
Museum Dino Directory listing that classifies the sauropodomorph Riojasaurus among the plant-eating (herbivorous) dinosaurs.
Öppna källa ↗Dinosaurs from the Late Triassic Period — Dino Directory
Natural History Museum, London
Granskad: 2026-09-04
Extinct taxon; conservation status NE
Öppna källa ↗Riojasaurus incertus Bonaparte 1969 (sauropodomorph)
Paleobiology Database
Granskad: 2026-09-04
Authoritative overview of the species covering its original description by Bonaparte (1969), its Late Triassic (Norian) age, ecology and Argentine occurrences.
Öppna källa ↗Riojasaurus incertus Bonaparte 1969 (sauropodomorph)
Paleobiology Database
Granskad: 2026-09-04
Authoritative overview of the species covering its original description by Bonaparte (1969), its Late Triassic (Norian) age, ecology and Argentine occurrences.
Öppna källa ↗Riojasaurus incertus Bonaparte 1969 (sauropodomorph)
Paleobiology Database
Granskad: 2026-09-04
Authoritative overview of the species covering its original description by Bonaparte (1969), its Late Triassic (Norian) age, ecology and Argentine occurrences.
Öppna källa ↗Riojasaurus incertus Bonaparte 1969 (sauropodomorph)
Paleobiology Database
Granskad: 2026-09-04
Authoritative overview of the species covering its original description by Bonaparte (1969), its Late Triassic (Norian) age, ecology and Argentine occurrences.
Öppna källa ↗
