Named By: J. F. Bonaparte, J. Ferigolo & A. M. Ribeiro - 2001.
Classification: Chordata, Synapsida, Therapsida, Cynodontia, Tritheledontidae.
Species: R. guaibensis (type).
Known locations: Brazil - Caturrita Formation.
Time period: Norian of the Triassic.
Fossil representation: Based upon a partial skull, remains of several individuals are now known.
Riograndia is a genus of cynodont that lived in Brazil during the Triassic.
- A primitive Late Triassic 'ictidosaur' from Rio Grande do Sul, Brazil. - Palaeontology 44(4):623-635. - J. F. Bonaparte, J. Ferigolo & A. M. Ribeiro - 2001.