Saturnalia is an extinct genus of basal sauropodomorph dinosaur known from the Late Triassic Santa Maria Formation of Rio Grande do Sul, southern Brazil. It is one of the earliest known dinosaurs.
Guaibasaurus is an extinct genus of basal saurischian dinosaur known from the Late Triassic Caturrita Formation of Rio Grande do Sul, southern Brazil. Most analyses recover it as a sauropodomorph, although there are some suggestions that it was a theropod instead. In 2016 Gregory S. Paul estimated it at 2 meters and 10 kg, whereas in 2020 Molina-Pérez and Larramendi listed it at 3 meters and 35 kg.
Procolophon is a genus of lizard-like procolophonid parareptiles that first appeared in the Early Triassic (Induan) of South Africa, Brazil, and Antarctica. It persisted through the Permian–Triassic extinction event, but went extinct in the beginning of the Early Middle Triassic. The type species is P. trigoniceps.
The Caturrita Formation is a rock formation found in Rio Grande do Sul, Brazil. Its sediments were deposited in the Paraná Basin. The formation is from the Upper Triassic and forms part of the Santa Maria Supersequence in the upper section of the Rosário do Sul Group.
Luangwa is an extinct genus of traversodontid cynodonts. The species Luangwa drysdalli was discovered 1963 in the valley of the Luangwa river in Zambia, Africa. Luangwa lived in the Triassic period 240 Million years ago.
Protuberum is an extinct genus of traversodontid cynodonts known from a single species Protuberum cabralense, from the Middle Triassic of Brazil.
Riograndia is an extinct genus of prozostrodontian cynodonts from the Late Triassic of Brazil. The type and only species is Riograndia guaibensis, named after the State of Rio Grande do Sul and Guaíba Basin, where it was discovered. Remains have been found in the Caturrita Formation of the geopark of Paleorrota. It was a small non-mammalian cynodont, with 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. The genus defines the Riograndia Assemblage Zone.
Trucidocynodon is an extinct genus of ecteniniid cynodonts from the Upper Triassic (Carnian) of Brazil. It contains a single species, Trucidocynodon riograndensis. Fossils of Trucidocynodon were discovered in outcrops of the Upper Santa Maria Formation in Paleorrota Geopark Agudo. Trucidocynodon is one of the most completely known Triassic cynodonts, as its holotype is a nearly complete and fully articulated skeleton.
Irajatherium is an extinct genus of cynodonts, known only of the type species Irajatherium hernandezi. It is named in honor of Irajá Damiani Pinto.
Menadon is an extinct genus of traversodontid cynodonts. The type and only species is Menadon besairiei.
Teyumbaita is an extinct genus of hyperodapedontine rhynchosaur from the Upper Triassic of southern Brazil. Its fossils were recovered from the early Norian-age Caturrita Formation, one of several fossiliferous formations exposed at Paleorrota Geopark in the state of Rio Grande do Sul. Teyumbaita is likely the youngest valid genus of rhynchosaur, as other members of the group likely died out before the start of the Norian.
Soturnia is an extinct genus of procolophonid parareptile. It is known from rocks of the Late Triassic-age Caturrita Formation of the municipality of Faxinal do Soturno in the geopark of Paleorrota, Brazil. Soturnia was named in 2003 by Cisneros and Schultz; the type species is S. caliodon. It was a leptopleuroninae procolophonid.
Sangaia is an extinct genus of rhytidosteid temnospondyl from the early Triassic period of Rio Grande do Sul, Brazil. It is known from the holotype UMVT 4302, the left half of a partial skull, a partial palate, from the paratype UMVT 4303, a partial right palatal fragment and from the referred specimens PV 0497 T and MCN PV 2606, skull fragments, recovered from the Sanga do Cabral Formation in the Rośario do Sul Group.
Botucaraitherium is an extinct genus of prozostrodontian cynodonts from the early Norian Riograndia Assemblage Zone in the Candelária Formation of the Paraná Basin in southeastern Brazil. It is known from a single type species, Botucaraitherium belarminoi. The genus name is derived from the Botucaraí Hill, which dominates the landscape of Candelária, Rio Grande do Sul. The species epithet honors Belarmino Stefanello, a volunteer at the Museu Municipal Aristides Carlos Rodrigues, who found the fossil.
Dagasuchus is an extinct genus of pseudosuchian archosaur from the Late Triassic (Carnian) of Rio Grande do Sul, Brazil, represented by the type species Dagasuchus santacruzensis. D. santacruzensis was named in 2015 on the basis of a partial hip found in an exposure of the Santa Maria Formation in the Paraná Basin, near the city of Santa Cruz do Sul. Dagasuchus is an early member of a large evolutionary group called Loricata, which originated in the Triassic and includes modern crocodylians and their ancestors. Features of its hip closely resemble those of other early loricatans such as Stagonosuchus and Saurosuchus. Dagasuchus is notable for being the first loricatan found in the Santacruzodon assemblage zone of the Santa Maria Formation; previously loricatans were only known from the older Dinodontosaurus assemblage zone and the younger Hyperodapedon assemblage zone within the Santa Maria Formation, meaning that Dagasuchus fills in a gap in the fossil record of the group.
Ixalerpeton is a genus of lagerpetid avemetatarsalian containing one species, I. polesinensis. It lived in the Late Triassic of Brazil alongside the sauropodomorph dinosaur Buriolestes.
Pagosvenator is an extinct genus of erpetosuchid from the Mid-Late Triassic Dinodontosaurus Assemblage Zone of the Santa Maria Supergroup of Brazil. The type species, Pagosvenator candelariensis, was described in 2018.
Agudotherium is an extinct genus of probainognathian cynodonts from the Late Triassic Candelária Formation of the Paraná Basin in southern Brazil. The genus contains one species, Agudotherium gassenae. A. gassenae is known from three specimens, all consisting of partial lower jaws.
Maehary is a genus of archosaur from the Late Triassic (Norian) Caturrita Formation of Rio Grande do Sul, Brazil. The genus contains a single species, M. bonapartei, known from a partial skull and fragmentary postcrania.
Stenoscelida is a genus of proterochampsid archosauriforms from the Late Triassic Santa Maria Supersequence of Rio Grande do Sul, Brazil. The genus contains a single species, S. aurantiacus, known from a right hind limb.
