Phylogenetic analysis places Ganzhousaurus within Oviraptoridae. Within Oviraptoridae its phylogenetic position is more unstable, with one phylogenetic analysis recovering it as a member of the Oviraptorinae and another recovering it as a more derived member of the group, closely related to "ingeniines"[1][2] However, it also bears some similarities to the basal caenagnathidGigantoraptor.[1]
Paleobiology
Ganzhousaurus shared its habitat with at least four other oviraptorid species, Jiangxisaurus ganzhouensis, Nankangia jiangxiensis, Banji long, and an as-yet unnamed species. This diversity may have been made possible by niche partitioning, with Ganzhousaurus being primarily herbivorous.[3]