Pantydraco (where "panty-" is short for Pant-y-ffynnon, (signifying hollow of the spring/well in Welsh) referring to the quarry at Bonvilston in South Wales where it was found) was a genus of basal sauropodomorph dinosaur from the Late Triassic of the United Kingdom. It is based on a partial juvenile skeleton once thought to belong to Thecodontosaurus.