a plant-eating riojasaurid sauropodomorph dinosaur from the Late Triassic of Argentina.
La Rioja lizard
Synonyms: Strenusaurus procerus
La Rioja, Argentina
is derived from "La Rioja" (the Province in Argentina where its fossils were found) and the Greek "sauros" (lizard).
The species epithet
, means "uncertain" in Latin.
The first fossils of Riojasaurus
were discovered at La Esquina in the Los Colorados Formation, near Pagancilla, La Rioja Province, Argentina, during a José Bonaparte-led expedition of the Museo Argentino de Ciencias
Naturales and the Universidad Provincial de La Rioja, in 1966.
(PVL 3808) is a chunk of skeleton minus the skull, lower jaw, some vertebrae, both shoulder blades, part of the hip and the hands. A skull was found in the same area attached to PVL 3663—the partial skeleton of a specimen that was around 35% smaller than the holotype. The latter was initially named Strenusaurus procerus
by Bonaparte in 1969.
: 227-209 mya
Est. max. length
: 6.5 meters
Est. max. hip height
: 1.8 meters
Est. max. weight
: 1.2 tons
• Bonaparte JF (1967) "Dos nuevas "faunas" de reptiles triásicos de Argentina
". [Two new reptilian "faunas" of the Argentine Triassic]. Gondwana Stratigraphy, IUGS Symposium, Page 290-291
• Dodson P, Britt B, Carpenter K, Forster CA, Gillette DD, Norell MA, Olshevsky G, Parrish MJ, Weishampel DB (1994)
" in "The Age of Dinosaurs
• Bonaparte JF and Pumares JA (1967) "Notas sobre el primer craneo de Riojasaurus incertus
(Dinosauria, Prosauropoda, Melanorosauridae) del Triasico Superios de La Rioja, Argentina." [Notes on the first skull and jaws of Riojasaurus incertus (Dinosauria, Prosauropoda, Melanorosauridae) of the Late Triassic of La Rioja, Argentina
.] Translated by Jeffrey A Wilson,
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