The placement of "Acrocanthosaurus" is unclear, with most researchers favoring Carcharodontosauridae and others favoring Allosauridae. In 2011, a redescription of "Kelmayisaurus" by Stephen L. Brusatte, Roger B. J. Benson and Xing Xu found it to be valid genus of Carcharodontosauridae. A phylogenetic analysis of Tetanurae recovered "K. petrolicus" as a basal carcharodontosaurid in a trichotomy with "Eocarcharia" and a clade comprising more derived carcharodontosaurids. "Bahariasaurus" has also been proposed as a carcharodontosaurid, but its remains are too scarce to be certain.