| Riograndia Temporal range: Late Triassic |
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Synapsida |
| Order: | Therapsida |
| Suborder: | Cynodontia |
| Family: | Tritheledontidae |
| Genus: | Riograndia |
| Species | |
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Riograndia is a genus of tritheledontid cynodont from the Late Triassic of South America. The type species is R. guaibensis. Riograndia guaibensis was estimated to have been about 15 cm long and 30 g in weight. Remains have been found in the Caturrita Formation of the geopark of Paleorrota. It was a small non-mammalian cynodont several advanced features also present in mammals. Several specimens of Riograndia guaibensis have been found in the towns of Candelária and Faxinal do Soturno in the Caturrita Formation.[1]