Original: The fossil record does show that the divergence between anguimorphs, iguanians, and advanced snakes dates back roughly 200 MYA to the Late Triassic\/Early Jurassic.
Simplified: The fossil record shows that the divergence between anguimorphs, iguanians, and advanced snakes dates back roughly 200 MYA to the Upper Triassic\/Lower Jurassic.