Jared Grummer and Rob Bryson have described a new species, Sceloporus aurantius. Their paper is published in Zootaxa. You can read an article on the discovery of the new species in the UW Daily.
Grummer & Bryson. 2014. A new species of bunchgrass lizard (Squamata: Phrynosomatidae) from the southern sky islands of the Sierra Madre Occidental, Mexico. Zootaxa 3790(3): 439–450.