 Although possible pneumatic indentations have been found in "Plateosaurus" and "Thecodontosaurus", the indentations are very small.One study in 2007 concluded that prosauropods likely had abdominal and cervical air sacs, based on the evidence for them in sister taxa (theropods and sauropods).The study concluded that it was impossible to determine whether prosauropods had a bird-like flow-through lung, but that the air sacs were almost certainly present.