[Ha Ha Thats Very Logical]

the horns on the Agawa Rock glyph were added at a much later date

Do you have a reference for that claim? None of the things I just read about those glyphs mention that, but I was skimming.

Indian oral traditions describe Mishipishu has having a sawblade back

So if they "knew" it had a sawblade back, why did they draw it wrong?

Vine DeLoria’s “Red Earth, White Lies”

I see he further claims the creature "had one eye and in the middle of its forehead was one horn." Not many animals outside mythology have only one eye.

[wendy1946]

You might like the Cambodian version of the thing better:

That's from one of the temple columns at Angkor...