Maria Troncatti was an Italian Salesian Sister of Don Bosco who served as a missionary and nurse in Ecuador. Born into a farming family in 1883, she joined her religious order in 1905 and later provided medical care to wounded soldiers during the First World War. From 1922 until her death in 1969, she lived in the Amazon forest, where she worked among the Shuar people. Known affectionately by the local community as "Mamacita," she dedicated her life to both spiritual and medical service in the region.