Data from: A Triassic crown squamate

Here we report a modern-type lizard from the Late Triassic of England (202 Ma), comprising a partial skeleton, skull, and mandibles. It displays at least 15 unique squamate traits, and further, shares unidentatan and anguimorph apomorphies. The new find fixes the origin of crown Squamata as much older than had been thought, and the revised dating shows substantial diversification of modern-type squamates following the Carnian Pluvial Episode, 232 million years ago. The data set comprises five 3D models compiled from primary X-ray scan data.