Hi all! I just ran across a picture of a Phymaturus verdugo, which is a member of the liolaemus squamates of south American lizards and looks like a Chuckwalla! Check it out! It is pretty psychodelic looking, like ornate Uros. If you removed the body color, you'd swear it was a Chuck. And it is herbivorous and...get this...viviparus. Why have I never seen one of these before??? Way cool! Wikepedia has a picture.