Most thecodonts of the Late Triassic lacked certain pelvic features that aided locomotion, such as a deep acetabulum or a crest over the acetabulum. This, in spite of their upright posture, rendered them only slightly more mobile than sprawling reptiles. "Desmatosuchus" possessed both of these features, along with its long femur and elongate pubis, making it more mobile than most thecodonts of its time. This mobility, along with its size, abundance, and specialized beak made it the chief herbivore in the Dockum area.