a Proto Teotihuacan/Chontal stone mask, Late Preclassic/Early Protoclassic, ca. 300 B.C.-A.D. 200

showing the transition into Teotihuacan, the naturalistically  rendered face with oval eyes under arched brows, aquiline nose with flared nostrils and open mouth, the fine lips revealing gums, with ear flanges; in tan brown stone, pierced at the temples.

The evolution into the distinct Teotihuacan style is evident in the fluid naturalism and refined features, including smaller ear flanges, emphasis on the mouth and the balanced oval eyes and brows.