 Non-avian maniraptoran dinosaurs also had these uncinate processes, and they were proportionately as long as in modern diving birds, which indicates that maniraptorans needed a high-capacity oxygen supply.Plates that may have functioned the same way as uncinate processes have been observed in fossils of the ornithischian dinosaur "Thescelosaurus", and have been interpreted as evidence of high oxygen consumption and therefore high metabolic rate.Nasal turbinates are convoluted structures of thin bone in the nasal cavity.