The Sanga da Alemoa paleontological site is located in the city of Santa Maria, Rio Grande do Sul, in Brazil. It belongs to the Caturrita Formation and the Santa Maria Formation. It is located in the neighborhood of Castelinho. The site belongs to the paleorrota region.

Santa Maria is a municipality (município) in the central region of Rio Grande do Sul, the southernmost state of Brazil. In 2020, its population was 283,677 inhabitants in a total area of 1,823 square kilometres (704 sq mi). Santa Maria is the 5th biggest municipality in the state, and the largest in its micro-region.