(Rayoso lizard - after the Rayoso Formation).
Named By: Jose Fernando Bonaparte - 1996.
Classification: Chordata, Reptilia, Dinosauria, Saurischia, Sauropodomorpha, Sauropoda, Diplodocoidea, Rebbachisauridae.
Species: R. agrionensis (type).
Size: Uncertain, but very roughly estimated to be about 6 meters long.
Known locations: Argentina, Patagonia - Rayoso Formation.
Time period: Cenomanian of the Cretaceous.
Fossil representation: Partial post cranial remains including Scapula, femur and partial fibula.
A very small sauropod, Rayososaurus is considered to be very similar to another genus called Rebbachisaurus. Because Rayososaurus is from South America and Rebbachisaurus is from Africa, this has given rise to the notion that these two continents were joined for much longer than previously thought back in the Cretaceous.
- Cretaceous tetrapods of Argentina. - Münchner Geowissenschaften Abhandlungen 30:73-130. - J. F. Bonaparte - 1996.