Jaime Headden wrote- > <(1) the absence of a siphonium and pneumatic quadrate > in all coelurosaurs;> > > Oviraptorids have pnuematic quadrates (Maryanska and > Osmolska, 1996) Not to mention tyrannosaurids, some ornithomimids and troodontids. Also, Confuciusornis lacks this character. Mickey Mortimer