At 6 meters in length, the levantadores are the largest viriosaurs on the South American pampas.  Grazing on all fours, levantadores will rear up on their hind legs to escapee predators.  This transition between bipedal and quadripedal plant eater has happened a number of times in dinosaurian evolutionary history, and the levantadores are thus quite reminiscent of the much more primitive Lesothosaurus of the Jurassic.