sentences:  Since both the heads and the bodies are rather crudely shaped from large, rounded basaltic boulders, the subjects have a decidedly corpulent appearance.Because they seem to be male figures, they have been termed "potbellies" in the archaeological literature.Fifteen plain stelas were recorded at Monte Alto and one alignment of three large plain stelae erected in a north–south line could have served astronomical purposes as a means for recording days and the position of the sun for agricultural purposes.