 Some of the more anterior caudal vertebrae have chevron bones ventral to them which also increase the height of the tail.All presacral vertebrae have small osteoderms at the top of their neural spines.The cervical ribs are elongate, at least four times the length of their corresponding centra, and may have had strong muscles attached enabling it to create suction in its throat while lunging forward at prey by expanding the oesophagus.