The existence of giant oviraptorosaurians as Gigantoraptor explains several earlier Asian finds of very large , up to 53 centimetres long , oviraptorosaurian eggs , assigned to the oospecies Macroelongatoolithus xixiaensis .
The existence of giant oviraptorosaurians as Gigantoraptor explains several earlier Asian finds of very large , up to 53 centimetres long , oviraptorosaurian eggs .