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Thanks for your input. I looked at these again, and I guess originally I didn't feel like the spiny lizard , in my photos, had a complete collar. S. jarrovii in my book calls it Yarrows and notes a complete collar. Do you feel this is a complete collar?
As far as the other, I was leaning towards S. slevini because when I zoom in the side scales look horizontal....what do you think?
And, if your willing, would you call the attached a Desert Spiny? Thanks for you time.