·    The element which is described as “two rows of teeth in an open mouth” is no longer considered to be a syllabogram. It only occurs to write ch’ok in the phrase u-ch’ok k’aba’, and always in combination with the so-called “goggle eyes” (also no longer considered to be a variant of ch’o). Instead that fixed combination of “goggle eyes” above “row of teeth” is now considered to be CH’OK (i.e. a logogram) – see under logogram CH’OK for more information.

MC = K&H

·    Do not confuse ko with the visually similar (abstract variant of) CHAK:

o They are both “ovalish” (rectangles with rounded corners), rotatable signs.

o They are both have a dot at each end of the glyph.

but:

o ko has two parallel cross-hatched bands running along the long-axis of glyph.

o CHAK has two parallel cross-hatched bands running perpendicular to the long-axis of glyph (i.e., along the short axis of the glyph).