 The first two specimens of "Prestosuchus" to be described were found at the Weg Sanga site near the town of Sao Pedro do Sul in Rio Grande do Sul, Brazil.One specimen was a partial skeleton including a jaw and snout fragments, and its bones were labelled SNSB-BSPG AS XXV 1-3, 5-11, 28-41, and 49.This specimen was later designated as the lectotype of "Prestosuchus chiniquensis" in 1972.