New dinosaurs include ornithomimosaur Rativates evadens and bird Septencoracias morsensis.
New studies came out on the development of grasping feet in birds, the dentition of Hesperornis regalis and Ichthyornis dispar, the body size of abelisauroids, and convergent evolution of spinosaurids with muraenesocids. The anatomy of tracheal and esophageal displacement in birds is described. Melanin in feathers is elementally characterized. The evolution of bony cranial ornaments in theropods is found to be correlated with evolution of large body size (except in maniraptoriforms, supporting the idea that pennaceous feathers largely supplanted bony ornaments as display structures). Osteomyelitis is reported in a sauropod. Trackways suggest gregariousness in medium-sized ornithopods. Widespread tool use is discovered in Corvus hawaiiensis. Study of pigmentation in Psittacosaurus suggests that it was countershaded.