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ZoomDinosaurs.com
ALL ABOUT DINOSAURS!
What is a Dinosaur? Dino Info Pages Dinosaur Coloring Print-outs Name That Dino Biggest, Smallest, Oldest,... Evolution of Dinosaurs Dinos and Birds Dino Myths

RIOJASAURUS
"Lizard from La Rioja (a province of Argentina) "
Go to a Riojasaurus printout

Riojasaurus

Riojasaurus was one of the earliest of the large, plant-eating dinosaurs.

ANATOMY
Riojasaurus was a massive quadrupedal (walked on four legs) herbivore. It was a about 30-36 feet (9-11 m) long and was heavily built. It had a long neck, a long tail, a small head, a long, bulky body, and thick, elephant-like legs with claws. The back legs were only slightly larger than the front legs. Its limb bones were solid and thick, but its backbone was hollow. It had spoon-shaped, serrated teeth.



WHEN RIOJASAURUS LIVED
Riojasaurus lived during the late Triassic period, roughly 225-219 million years ago.

DIET
Riojasaurus was an herbivore, a plant eater. Given its leg and ankle structure, it probably couldn't rear up on its back legs to graze or run.

INTELLIGENCE
Riojasaurus was a sauropodomorpha, whose intelligence (as measured by its relative brain to body weight, or EQ) was the lowest among the dinosaurs.

EQ


DISCOVERY OF FOSSILS
ArgentinaAn almost complete Riojasaurus skeleton was found in northwest Argentina, in La Rioja Province. It was named by the Argentinian paleontologist José F. Bonaparte in 1969.

CLASSIFICATION
Riojasaurus was a Saurischian dinosaur, the order of lizard-hipped dinosaurs. It was a sauropodomorph (large, long-necked herbivores) and perhaps a melanorosaurid (the largest prosauropods; quadrupedal, thick-limbed herbivores). The type species is R. incertus (Bonaparte, 1969).



Information Sheets About Dinosaurs
(and Other Prehistoric Creatures)

Just click on an animal's name to go to that information sheet. If the dinosaur you're interested in isn't here, check the Dinosaur Dictionary or the list of Dinosaur Genera. Names with an asterisk (*) were not dinosaurs.
How to write a great dinosaur report.

For dinosaur printouts, click here.

For brief dinosaur fact sheets, click here.





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