Species: mariantensis SCHULTZ, LANGER & MONTEFELTRO, 2016
Etymology: In reference to the Porto Mariante, the nearest town of the type-locality.
Holotype: UFRGS-PV-0168-T
Locality: Mariante 1, along RS-240 road near the town of Porto Mariante, 28 km east of Venancio Aires, 29°41'9.72"S, 51°54'58.01"W, Bom Retiro do Sul municipality, Rio Grande do Sul State, Brazil.
Horizon: Alemoa Member, Santa Maria Formation.
Biostratigraphy: Dinodontosaurus Assemblage Zone.
Age: Ladinian Stage, Late Mid Triassic Epoch, Middle Triassic.
Material: Complete skull lacking the lower jaws, atlas, axis and third cervical vertebra.
Partype:
UFRGS-PV-0315-T: Right maxilla and dentary.