Ideas:

1. The base of this strange glyph looks like an upside down variant of what is found at the top of this complex glyph (Ea2-17):

2. The rest of the glyph reminds me of a hanging body. The legs are at the top, then comes the fat torso, then the arms and a long neck ending in a head with horns. The bull of the moon sacrificed?

3. The 'horns' have a shape similar to this type of glyph:

In the calendar of the year (according to Small Santiago) we find these 'horns' twice, viz. after midsummer:

and after the winter solstice:

Is there a meaning of having passed away? Only the 'horns' remain. (Or is it a picture of a clam having been opened and the living animal removed?).