It was clear to Xu et al. that Gigantoraptor belonged to the Oviraptorosauria , a group named after Oviraptor , but compared to other known members , Gigantoraptor was much larger , approximately three times as long and 35 times more massive than the heaviest earlier discovered oviraptorosaurid Citipati .
Gigantoraptor belonged to the Oviraptorosauria , a group named after Oviraptor , but compared to other known members , Gigantoraptor was much larger , approximately three times as long and 35 times more massive than the heaviest earlier discovered oviraptorosaurid Citipati .