Found by Nat Camp Animal Extremes!
Pics on big camera, will follow later.
On boardwalk at Badlands Hotel, Lajitas, TX. GTS 1763.
Hembra y macho de Aspidoscelis deppei en apareamiento
Teiidae is a family of lizards native to the Americas, generally known as whiptails. The group includes the parthenogenic genera Cnemidophorus and Aspidoscelis, and the non-parthenogenic Tupinambis. It has over 230 member species in ten genera. About 75% of the species are in two dominant genera, Aspidoscelis and Cnemidophorus.