Gigantoraptor
Gigantoraptor belonged to the Oviraptorosauria, a group named after Oviraptor. Compared to other known members, Gigantoraptor was much larger, about three times as long and 35 times more massive than the earlier discovered oviraptorosaurid Citipati. Xu et al. estimated the length at  and the weight at 1400 kilogrammes. In 2010 Gregory S. Paul even gave an estimate of two tonnes (2.2 tons).