Restoration of Riojasaurus

Riojasaurus ("Rioja lizard") is a sauropodomorph dinosaur of Late Triassic Argentina.


Riojasaurus is large for a prosauropod, growing to about 10 meters in length. It was especially bulky, and had heavy legs, which meant it was probably quadrupedal.[1]


Riojasaurus has been considered a close relative of the earliest sauropods. However, this is possibly due to convergent evolution.[2]


Riojasaurus was described in 1967 by José Bonaparte from the Los Colorados Formation of Argentina.[3]


  1. Van Heerden, J. and Galton, P.M. (1997). "The affinities of Melanorosaurus a Late Triassic prosauropod dinosaur from South Africa". Neues Jahrbuch für Geologie und Paläontologie Monatshefte. (1):39-55
  2. "Riojasaurus." In: Dodson, Peter & Britt, Brooks & Carpenter, Kenneth & Forster, Catherine A. & Gillette, David D. & Norell, Mark A. & Olshevsky, George & Parrish, J. Michael & Weishampel, David B. The Age of Dinosaurs. Publications International, LTD. p. 41. ISBN 0-7853-0443-6.
  3. Moody, Richard. Dinofile. pg 20. Octopus Publishing Group Ltd., 2006