Spinden cites these masks as an example of extreme elimination of elements so that only the eyes and nose are left. He writes: "Space considerations have something to do with elimination in many instances. The lateral ear ornaments are the most elastic features of the mask panel...If the space is very short, the lateral ornaments are left off entirely. Since the first consideration in placing a mask was to get it centered over the door, this elasticity counted."
Herbert J. Spinden, A Study of Maya Art: Its Subject Matter & Historical Development, p. 122-3