Chilantaisaurus

Chilantaisaurus ("Ch'i-lan-t'ai lizard") was a possible spinosauroid dinosaur from the late Cretaceous Ulansuhai Formation of China (Turonian stage, about 92 million years ago). The type species, C. tashuikouensis, was described by Hu in 1964.

Classification
Hu initially considered Chilantaisaurus to be a carnosaur related to Allosaurus, though subsequent studies suggested that it may be a spinosauroid, possibly a primitive member of the spinosaurid family (Sereno, 1998; Chure, 2002; Rauhut, 2001), or a member of an alternate offshoot of neotetanuran theropods, with some similarities to allosauroids, spinosauroids, and coelurosaurians. A 1999 study by Brusatte and colleagues suggested that it might be synonymous with Shaochilong, and thus a carcharodontosaurid.

Several species have been described based on very poor remains. ''Chilantaisaurus? sibiricus'' is poorly described, so its relationships cannot be accurately determined (Chure, 2002). "Chilantaisaurus" maortuensis was reclassified as Shaochilong maortuensis in 2009. Bones attributed to "Chilantaisaurus" zheziangensis come from a therizinosaur, and may in fact come from the same individual as the type specimen of Nanshiungosaurus.