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Holcosus (Ameiva) bridgesii
Thanks Scott. It does look like the picture of Bridges Ameiva you linked and is definitely a better choice than what I originally thought.
I am not positive this is Bridge's ameiva. I am basing this suggestion on just one small image on http://www.spanglefish.com/ppne/index.as... , the facts that bridgesii occurs in Ecuador and A. festiva does not, and that this specimen does not closely resemble your other image of what I suggested was A. septemlineata.