Chilantaisaurus ("Jilantai Salt Lake [zh] lizard"[1]) is a genus of large theropod dinosaur, possibly a neovenatorid or a primitive coelurosaur, from the Late Cretaceous Ulansuhai Formation of China (Turonian age, about 92 million years ago).

[6] Hu considered Chilantaisaurus to be a carnosaur related to Allosaurus,[1] though some subsequent studies suggested that it may be a spinosauroid, possibly a primitive member of the spinosaurid family (Sereno, 1998; Chure, 2000; Rauhut, 2001) because it had large claws on the forelimbs thought to be unique to that group.

sibiricus) is based on a single distal metatarsal discovered in 1915 in the Turginskaya Svita of the Buryat Autonomous Soviet Socialist Republic, Russia, dating to the Early Cretaceous periods (Berriasian to Hauterivian stages).

[9] An additional species named in 1979, "Chilantaisaurus" zheziangensis, based on bones from the foot and a partial tibia,[14] is actually a therizinosaur taxon.

[15][16] The cladogram below follows a 2016 analysis by Sebastián Apesteguía, Nathan D. Smith, Rubén Juarez Valieri, and Peter J. Makovicky based on the dataset of Carrano et al.