Evidence for Avian Intrathoracic Air Sacs in a New Predatory Dinosaur from Argentina Sereno, Paul C. ; Martinez, Ricardo N. ; Wilson, Jeffrey A. ; Varricchio, David J. ; Alcober, Oscar A. ; Larsson, Hans C. E. Abstract Publication: PLoS ONE Pub Date: September 2008 DOI: 10.1371/journal.pone.0003303 Bibcode: 2008PLoSO...3.3303S