Unaysaurus tolentinoi. Reconstitution of the fossil found in sediments of the Caturrita Formation, in the district of Agua Negra, south of the municipality of São Martinho da Serra, in Rio Grande do Sul. The fossil represents the first specimen found In the country belonging to the group Prosauropoda - dinosaurs of herbivorous habit, bulky body and small head supported by long neck. The Unaysaurus tolentinoi lived in the Triassic period, 251 to 199.6 million years ago.