Allosaurus (Marsh, 1877) = Creosaurus atrox (Marsh,1878) Epanterias amplexus (Cope,1878) Labrosaurus (Marsh,1879) Saurophagus (Ray,1941)  Allosaurus > A. fragilis (Marsh,1877) >> Laelaps trihedrodon (Cope,1877) Creosaurus atrox (Marsh,1878) Epanteris amplexus (Cope,1878) Hypsirophus discurus [partim] (Cope,1878) Allosaurus lucaris (Marsh,1878) Allosaurus ferox (Marsh,1896) ?Saurophagus maximus (Ray,1941) ?Labrosaurus ferox (Marsh,1884) Camptosaurus amplus (Marsh,1879) = Camptonotus amplus (Marsh,1879) A. whitei (Pickering, 1995) Allosaurus > A.tendagurensis (Janensch, 1925)

Based on YPM 1893 (partial skull, partial dentaries, partial surangular, dorsal central fragment, dorsal rib fragments, scapular fragment, ncomplete pedal ungual).