Genus
Valid Extinct

Riojasaurus

Bonaparte 1969
Etymology Reptile de La Rioja

Riojasaurus was a herbivorous sauropodomorph dinosaur named after La Rioja Province in Argentina where it was found in the Los Colorados Formation in the Ischigualasto-Villa Unión Basin by José Bonaparte. It lived during the Late Triassic and grew to about 6.6 metres (22 ft) long. Riojasaurus is the only known riojasaurid to live in South America.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
2
Group
Dinosaures
Terrestrial
Riojasaurus
click to enlarge
Riojasaurus skull cast, Copenhagen. © FunkMonk · CC BY 3.0 · Wikimedia
PBDB ↗ Wikipedia ↗
Classification
Dinosauria Unranked clade
›
Saurischia Unranked clade
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Sauropodomorpha Unranked clade
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Massopoda Unranked clade
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Riojasauridae Unranked clade
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Riojasaurus Genus
Measurements
Length
6,8 m ⓘ
Riojasaurus incertus
5,15 m ⓘ
Mass
800 kg ⓘ
Riojasaurus incertus
Fossil sites 2 geolocated sites
Distribution
Top countries
🇦🇷 Argentina
2
Geological formations
Los Colorados
2
Temporal distribution
Norian (227.3–205.7 Ma)
2
Species (2)
Riojasaurus incertus 227 Ma
Strenusaurus procerus subjective synonym of Riojasaurus incertus 227 Ma
Synonyms (1)
Strenusaurus subjective synonym of Riojasaurus
Images 2
Bibliography
Original description
J. F. Bonaparte. 1969. Dos nuevas "faunas" de reptiles triasicos de Argentina [Two new reptilian "faunas" of the Argentine Triassic]. Gondwana Stratigraphy (IUGS Symposium, Buenos Aires) 2:283-306
Bibliography (2)
J. F. Bonaparte and J. A. Pumares. 1995. Notas sobre el primer craneo de Riojasaurus incertus (Dinosauria, Prosauropoda, Melanorosauridae) del Triasico Superior de La Rioja, Argentina [Notes on the first skull and jaws of Riojasaurus incertus (Dinosauria, Prosauropoda, Melanorosauridae), Late Triassic of La Rioja, Argentina]. Ameghiniana 32(4):341-349
J. F. Bonaparte. 1969. Dos nuevas "faunas" de reptiles triasicos de Argentina [Two new reptilian "faunas" of the Argentine Triassic]. Gondwana Stratigraphy (IUGS Symposium, Buenos Aires) 2:283-306