So I believe that the explanation for this type of glyph:

is that we here see two arrow-tails fused together ('two sunbeams of light', 'one on top of the other'), an explanation based on the 'anticephalic' concept.

Remember the story from Africa? The rays of the sun are arrows.

In the 'calendar' of the day the texts of H and Q use this type of glyph during that time of the day when sun is strong. What may be meant with showing this double arrow-tail?

That question is still not answered. We must continue.

I remember that we may have an 'anticephalic' (or rather 'anti-anticephalic' as the 'heads' are at top and bottom) toko te ragi in Tahua:

The double character is confirmed by there being two 'eyes' in the following hau tea.

And, come to think of it, I suddenly realize that this 'anti-anticephalic' GD32 might be a combination of GD24 with something else, thumbs = spurs?

Posnansky's explanation of the 'anticephalic' concept as due to a wish to combine the rising and setting moons into one may easily be transformed into GD24 as due to a wish to combine the rising and setting suns into one. Spurs belong to cocks and they announce that sun is rising. Perhaps there is a spur only in the bottom half of the glyph above? The upper one is not so sharp and could be something else, a beak?